From af7a78dd5ec99909f27fea799859d4ae806bcb8e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Emmanuel=20Beno=C3=AEt?= Date: Thu, 1 Nov 2012 19:42:59 +0100 Subject: [PATCH] XPT2046 touchscreen access ... finally. --- 06-TouchScreen/Makefile | 221 ++++++++++++++++ 06-TouchScreen/README.txt | 16 ++ 06-TouchScreen/chconf.h | 535 ++++++++++++++++++++++++++++++++++++++ 06-TouchScreen/halconf.h | 349 +++++++++++++++++++++++++ 06-TouchScreen/main.c | 117 +++++++++ 06-TouchScreen/mcuconf.h | 257 ++++++++++++++++++ 06-TouchScreen/xpt2046.c | 125 +++++++++ 06-TouchScreen/xpt2046.h | 31 +++ 8 files changed, 1651 insertions(+) create mode 100644 06-TouchScreen/Makefile create mode 100644 06-TouchScreen/README.txt create mode 100644 06-TouchScreen/chconf.h create mode 100644 06-TouchScreen/halconf.h create mode 100644 06-TouchScreen/main.c create mode 100644 06-TouchScreen/mcuconf.h create mode 100644 06-TouchScreen/xpt2046.c create mode 100644 06-TouchScreen/xpt2046.h diff --git a/06-TouchScreen/Makefile b/06-TouchScreen/Makefile new file mode 100644 index 0000000..69a2df7 --- /dev/null +++ b/06-TouchScreen/Makefile @@ -0,0 +1,221 @@ +PROJECT = TouchScreen +PRJ_C_SRC = main.c \ + xpt2046.c + +############################################################################## +# Build global options +# NOTE: Can be overridden externally. +# + +# Compiler options here. +ifeq ($(USE_OPT),) + USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16 +endif + +# C specific options here (added to USE_OPT). +ifeq ($(USE_COPT),) + USE_COPT = +endif + +# C++ specific options here (added to USE_OPT). +ifeq ($(USE_CPPOPT),) + USE_CPPOPT = -fno-rtti +endif + +# Enable this if you want the linker to remove unused code and data +ifeq ($(USE_LINK_GC),) + USE_LINK_GC = yes +endif + +# If enabled, this option allows to compile the application in THUMB mode. +ifeq ($(USE_THUMB),) + USE_THUMB = yes +endif + +# Enable this if you want to see the full log while compiling. +ifeq ($(USE_VERBOSE_COMPILE),) + USE_VERBOSE_COMPILE = no +endif + +# +# Build global options +############################################################################## + +############################################################################## +# Architecture or project specific options +# + +# Enables the use of FPU on Cortex-M4. +# Enable this if you really want to use the STM FWLib. +ifeq ($(USE_FPU),) + USE_FPU = no +endif + +# Enable this if you really want to use the STM FWLib. +ifeq ($(USE_FWLIB),) + USE_FWLIB = no +endif + +# +# Architecture or project specific options +############################################################################## + +############################################################################## +# Project, sources and paths +# + +# Imported source files and paths +CHIBIOS = ../ChibiOS +include $(CHIBIOS)/boards/ST_STM32F4_DISCOVERY/board.mk +include $(CHIBIOS)/os/hal/platforms/STM32F4xx/platform.mk +include $(CHIBIOS)/os/hal/hal.mk +include $(CHIBIOS)/os/ports/GCC/ARMCMx/STM32F4xx/port.mk +include $(CHIBIOS)/os/kernel/kernel.mk + +# Define linker script file here +LDSCRIPT= $(PORTLD)/STM32F407xG.ld +#LDSCRIPT= $(PORTLD)/STM32F407xG_CCM.ld + +# C sources that can be compiled in ARM or THUMB mode depending on the global +# setting. +CSRC = $(PORTSRC) \ + $(KERNSRC) \ + $(HALSRC) \ + $(PLATFORMSRC) \ + $(BOARDSRC) \ + $(PRJ_C_SRC) + +# C++ sources that can be compiled in ARM or THUMB mode depending on the global +# setting. +CPPSRC = + +# C sources to be compiled in ARM mode regardless of the global setting. +# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler +# option that results in lower performance and larger code size. +ACSRC = + +# C++ sources to be compiled in ARM mode regardless of the global setting. +# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler +# option that results in lower performance and larger code size. +ACPPSRC = + +# C sources to be compiled in THUMB mode regardless of the global setting. +# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler +# option that results in lower performance and larger code size. +TCSRC = + +# C sources to be compiled in THUMB mode regardless of the global setting. +# NOTE: Mixing ARM and THUMB mode enables the -mthumb-interwork compiler +# option that results in lower performance and larger code size. +TCPPSRC = + +# List ASM source files here +ASMSRC = $(PORTASM) + +INCDIR = $(PORTINC) $(KERNINC) $(TESTINC) \ + $(HALINC) $(PLATFORMINC) $(BOARDINC) \ + $(CHIBIOS)/os/various/devices_lib/accel \ + $(CHIBIOS)/os/various + +# +# Project, sources and paths +############################################################################## + +############################################################################## +# Compiler settings +# + +MCU = cortex-m4 + +#TRGT = arm-elf- +TRGT = arm-none-eabi- +CC = $(TRGT)gcc +CPPC = $(TRGT)g++ +# Enable loading with g++ only if you need C++ runtime support. +# NOTE: You can use C++ even without C++ support if you are careful. C++ +# runtime support makes code size explode. +LD = $(TRGT)gcc +#LD = $(TRGT)g++ +CP = $(TRGT)objcopy +AS = $(TRGT)gcc -x assembler-with-cpp +OD = $(TRGT)objdump +HEX = $(CP) -O ihex +BIN = $(CP) -O binary + +# ARM-specific options here +AOPT = + +# THUMB-specific options here +TOPT = -mthumb -DTHUMB + +# Define C warning options here +CWARN = -Wall -Wextra -Wstrict-prototypes + +# Define C++ warning options here +CPPWARN = -Wall -Wextra + +# +# Compiler settings +############################################################################## + +############################################################################## +# Start of default section +# + +# List all default C defines here, like -D_DEBUG=1 +DDEFS = + +# List all default ASM defines here, like -D_DEBUG=1 +DADEFS = + +# List all default directories to look for include files here +DINCDIR = + +# List the default directory to look for the libraries here +DLIBDIR = + +# List all default libraries here +DLIBS = + +# +# End of default section +############################################################################## + +############################################################################## +# Start of user section +# + +# List all user C define here, like -D_DEBUG=1 +UDEFS = + +# Define ASM defines here +UADEFS = + +# List all user directories here +UINCDIR = + +# List the user directory to look for the libraries here +ULIBDIR = + +# List all user libraries here +ULIBS = + +# +# End of user defines +############################################################################## + +ifeq ($(USE_FPU),yes) + USE_OPT += -mfloat-abi=softfp -mfpu=fpv4-sp-d16 -fsingle-precision-constant + DDEFS += -DCORTEX_USE_FPU=TRUE +else + DDEFS += -DCORTEX_USE_FPU=FALSE +endif + +ifeq ($(USE_FWLIB),yes) + include $(CHIBIOS)/ext/stm32lib/stm32lib.mk + CSRC += $(STM32SRC) + INCDIR += $(STM32INC) + USE_OPT += -DUSE_STDPERIPH_DRIVER +endif + +include $(CHIBIOS)/os/ports/GCC/ARMCMx/rules.mk diff --git a/06-TouchScreen/README.txt b/06-TouchScreen/README.txt new file mode 100644 index 0000000..ebb1a6a --- /dev/null +++ b/06-TouchScreen/README.txt @@ -0,0 +1,16 @@ +Read coordinates from an XPT2046 touchscreen and displays the coordinates by +flashing the blue and orange LEDs (MSB to LSB, red LED serves as a clock). + +Sounds simple enough. Yeah, right. + +Mistakes made (in addition to misreading docs): + - Trying to sample in 8-bit mode. This is damned useless. + - Trying to use the BUSY signal. Pointless, better left alone. + - Not oversampling. + +Connections to use: see xpt2046.h +Requires an SPI driver with SPI_USE_WAIT; SPI_USE_MUTUAL_EXCLUSION supported. + +Program includes some idiot-proofing to prevent being unable to flash the board +(press user button, press reset button, release reset button, red LED lights up +to indicate idiot-proof mode). diff --git a/06-TouchScreen/chconf.h b/06-TouchScreen/chconf.h new file mode 100644 index 0000000..b1f2cd6 --- /dev/null +++ b/06-TouchScreen/chconf.h @@ -0,0 +1,535 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, + 2011,2012 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/** + * @file templates/chconf.h + * @brief Configuration file template. + * @details A copy of this file must be placed in each project directory, it + * contains the application specific kernel settings. + * + * @addtogroup config + * @details Kernel related settings and hooks. + * @{ + */ + +#ifndef _CHCONF_H_ +#define _CHCONF_H_ + +/*===========================================================================*/ +/** + * @name Kernel parameters and options + * @{ + */ +/*===========================================================================*/ + +/** + * @brief System tick frequency. + * @details Frequency of the system timer that drives the system ticks. This + * setting also defines the system tick time unit. + */ +#if !defined(CH_FREQUENCY) || defined(__DOXYGEN__) +#define CH_FREQUENCY 1000 +#endif + +/** + * @brief Round robin interval. + * @details This constant is the number of system ticks allowed for the + * threads before preemption occurs. Setting this value to zero + * disables the preemption for threads with equal priority and the + * round robin becomes cooperative. Note that higher priority + * threads can still preempt, the kernel is always preemptive. + * + * @note Disabling the round robin preemption makes the kernel more compact + * and generally faster. + */ +#if !defined(CH_TIME_QUANTUM) || defined(__DOXYGEN__) +#define CH_TIME_QUANTUM 20 +#endif + +/** + * @brief Managed RAM size. + * @details Size of the RAM area to be managed by the OS. If set to zero + * then the whole available RAM is used. The core memory is made + * available to the heap allocator and/or can be used directly through + * the simplified core memory allocator. + * + * @note In order to let the OS manage the whole RAM the linker script must + * provide the @p __heap_base__ and @p __heap_end__ symbols. + * @note Requires @p CH_USE_MEMCORE. + */ +#if !defined(CH_MEMCORE_SIZE) || defined(__DOXYGEN__) +#define CH_MEMCORE_SIZE 0 +#endif + +/** + * @brief Idle thread automatic spawn suppression. + * @details When this option is activated the function @p chSysInit() + * does not spawn the idle thread automatically. The application has + * then the responsibility to do one of the following: + * - Spawn a custom idle thread at priority @p IDLEPRIO. + * - Change the main() thread priority to @p IDLEPRIO then enter + * an endless loop. In this scenario the @p main() thread acts as + * the idle thread. + * . + * @note Unless an idle thread is spawned the @p main() thread must not + * enter a sleep state. + */ +#if !defined(CH_NO_IDLE_THREAD) || defined(__DOXYGEN__) +#define CH_NO_IDLE_THREAD FALSE +#endif + +/** @} */ + +/*===========================================================================*/ +/** + * @name Performance options + * @{ + */ +/*===========================================================================*/ + +/** + * @brief OS optimization. + * @details If enabled then time efficient rather than space efficient code + * is used when two possible implementations exist. + * + * @note This is not related to the compiler optimization options. + * @note The default is @p TRUE. + */ +#if !defined(CH_OPTIMIZE_SPEED) || defined(__DOXYGEN__) +#define CH_OPTIMIZE_SPEED TRUE +#endif + +/** @} */ + +/*===========================================================================*/ +/** + * @name Subsystem options + * @{ + */ +/*===========================================================================*/ + +/** + * @brief Threads registry APIs. + * @details If enabled then the registry APIs are included in the kernel. + * + * @note The default is @p TRUE. + */ +#if !defined(CH_USE_REGISTRY) || defined(__DOXYGEN__) +#define CH_USE_REGISTRY TRUE +#endif + +/** + * @brief Threads synchronization APIs. + * @details If enabled then the @p chThdWait() function is included in + * the kernel. + * + * @note The default is @p TRUE. + */ +#if !defined(CH_USE_WAITEXIT) || defined(__DOXYGEN__) +#define CH_USE_WAITEXIT TRUE +#endif + +/** + * @brief Semaphores APIs. + * @details If enabled then the Semaphores APIs are included in the kernel. + * + * @note The default is @p TRUE. + */ +#if !defined(CH_USE_SEMAPHORES) || defined(__DOXYGEN__) +#define CH_USE_SEMAPHORES TRUE +#endif + +/** + * @brief Semaphores queuing mode. + * @details If enabled then the threads are enqueued on semaphores by + * priority rather than in FIFO order. + * + * @note The default is @p FALSE. Enable this if you have special requirements. + * @note Requires @p CH_USE_SEMAPHORES. + */ +#if !defined(CH_USE_SEMAPHORES_PRIORITY) || defined(__DOXYGEN__) +#define CH_USE_SEMAPHORES_PRIORITY FALSE +#endif + +/** + * @brief Atomic semaphore API. + * @details If enabled then the semaphores the @p chSemSignalWait() API + * is included in the kernel. + * + * @note The default is @p TRUE. + * @note Requires @p CH_USE_SEMAPHORES. + */ +#if !defined(CH_USE_SEMSW) || defined(__DOXYGEN__) +#define CH_USE_SEMSW TRUE +#endif + +/** + * @brief Mutexes APIs. + * @details If enabled then the mutexes APIs are included in the kernel. + * + * @note The default is @p TRUE. + */ +#if !defined(CH_USE_MUTEXES) || defined(__DOXYGEN__) +#define CH_USE_MUTEXES TRUE +#endif + +/** + * @brief Conditional Variables APIs. + * @details If enabled then the conditional variables APIs are included + * in the kernel. + * + * @note The default is @p TRUE. + * @note Requires @p CH_USE_MUTEXES. + */ +#if !defined(CH_USE_CONDVARS) || defined(__DOXYGEN__) +#define CH_USE_CONDVARS TRUE +#endif + +/** + * @brief Conditional Variables APIs with timeout. + * @details If enabled then the conditional variables APIs with timeout + * specification are included in the kernel. + * + * @note The default is @p TRUE. + * @note Requires @p CH_USE_CONDVARS. + */ +#if !defined(CH_USE_CONDVARS_TIMEOUT) || defined(__DOXYGEN__) +#define CH_USE_CONDVARS_TIMEOUT TRUE +#endif + +/** + * @brief Events Flags APIs. + * @details If enabled then the event flags APIs are included in the kernel. + * + * @note The default is @p TRUE. + */ +#if !defined(CH_USE_EVENTS) || defined(__DOXYGEN__) +#define CH_USE_EVENTS TRUE +#endif + +/** + * @brief Events Flags APIs with timeout. + * @details If enabled then the events APIs with timeout specification + * are included in the kernel. + * + * @note The default is @p TRUE. + * @note Requires @p CH_USE_EVENTS. + */ +#if !defined(CH_USE_EVENTS_TIMEOUT) || defined(__DOXYGEN__) +#define CH_USE_EVENTS_TIMEOUT TRUE +#endif + +/** + * @brief Synchronous Messages APIs. + * @details If enabled then the synchronous messages APIs are included + * in the kernel. + * + * @note The default is @p TRUE. + */ +#if !defined(CH_USE_MESSAGES) || defined(__DOXYGEN__) +#define CH_USE_MESSAGES TRUE +#endif + +/** + * @brief Synchronous Messages queuing mode. + * @details If enabled then messages are served by priority rather than in + * FIFO order. + * + * @note The default is @p FALSE. Enable this if you have special requirements. + * @note Requires @p CH_USE_MESSAGES. + */ +#if !defined(CH_USE_MESSAGES_PRIORITY) || defined(__DOXYGEN__) +#define CH_USE_MESSAGES_PRIORITY FALSE +#endif + +/** + * @brief Mailboxes APIs. + * @details If enabled then the asynchronous messages (mailboxes) APIs are + * included in the kernel. + * + * @note The default is @p TRUE. + * @note Requires @p CH_USE_SEMAPHORES. + */ +#if !defined(CH_USE_MAILBOXES) || defined(__DOXYGEN__) +#define CH_USE_MAILBOXES TRUE +#endif + +/** + * @brief I/O Queues APIs. + * @details If enabled then the I/O queues APIs are included in the kernel. + * + * @note The default is @p TRUE. + */ +#if !defined(CH_USE_QUEUES) || defined(__DOXYGEN__) +#define CH_USE_QUEUES TRUE +#endif + +/** + * @brief Core Memory Manager APIs. + * @details If enabled then the core memory manager APIs are included + * in the kernel. + * + * @note The default is @p TRUE. + */ +#if !defined(CH_USE_MEMCORE) || defined(__DOXYGEN__) +#define CH_USE_MEMCORE TRUE +#endif + +/** + * @brief Heap Allocator APIs. + * @details If enabled then the memory heap allocator APIs are included + * in the kernel. + * + * @note The default is @p TRUE. + * @note Requires @p CH_USE_MEMCORE and either @p CH_USE_MUTEXES or + * @p CH_USE_SEMAPHORES. + * @note Mutexes are recommended. + */ +#if !defined(CH_USE_HEAP) || defined(__DOXYGEN__) +#define CH_USE_HEAP TRUE +#endif + +/** + * @brief C-runtime allocator. + * @details If enabled the the heap allocator APIs just wrap the C-runtime + * @p malloc() and @p free() functions. + * + * @note The default is @p FALSE. + * @note Requires @p CH_USE_HEAP. + * @note The C-runtime may or may not require @p CH_USE_MEMCORE, see the + * appropriate documentation. + */ +#if !defined(CH_USE_MALLOC_HEAP) || defined(__DOXYGEN__) +#define CH_USE_MALLOC_HEAP FALSE +#endif + +/** + * @brief Memory Pools Allocator APIs. + * @details If enabled then the memory pools allocator APIs are included + * in the kernel. + * + * @note The default is @p TRUE. + */ +#if !defined(CH_USE_MEMPOOLS) || defined(__DOXYGEN__) +#define CH_USE_MEMPOOLS TRUE +#endif + +/** + * @brief Dynamic Threads APIs. + * @details If enabled then the dynamic threads creation APIs are included + * in the kernel. + * + * @note The default is @p TRUE. + * @note Requires @p CH_USE_WAITEXIT. + * @note Requires @p CH_USE_HEAP and/or @p CH_USE_MEMPOOLS. + */ +#if !defined(CH_USE_DYNAMIC) || defined(__DOXYGEN__) +#define CH_USE_DYNAMIC TRUE +#endif + +/** @} */ + +/*===========================================================================*/ +/** + * @name Debug options + * @{ + */ +/*===========================================================================*/ + +/** + * @brief Debug option, system state check. + * @details If enabled the correct call protocol for system APIs is checked + * at runtime. + * + * @note The default is @p FALSE. + */ +#if !defined(CH_DBG_SYSTEM_STATE_CHECK) || defined(__DOXYGEN__) +#define CH_DBG_SYSTEM_STATE_CHECK FALSE +#endif + +/** + * @brief Debug option, parameters checks. + * @details If enabled then the checks on the API functions input + * parameters are activated. + * + * @note The default is @p FALSE. + */ +#if !defined(CH_DBG_ENABLE_CHECKS) || defined(__DOXYGEN__) +#define CH_DBG_ENABLE_CHECKS FALSE +#endif + +/** + * @brief Debug option, consistency checks. + * @details If enabled then all the assertions in the kernel code are + * activated. This includes consistency checks inside the kernel, + * runtime anomalies and port-defined checks. + * + * @note The default is @p FALSE. + */ +#if !defined(CH_DBG_ENABLE_ASSERTS) || defined(__DOXYGEN__) +#define CH_DBG_ENABLE_ASSERTS FALSE +#endif + +/** + * @brief Debug option, trace buffer. + * @details If enabled then the context switch circular trace buffer is + * activated. + * + * @note The default is @p FALSE. + */ +#if !defined(CH_DBG_ENABLE_TRACE) || defined(__DOXYGEN__) +#define CH_DBG_ENABLE_TRACE FALSE +#endif + +/** + * @brief Debug option, stack checks. + * @details If enabled then a runtime stack check is performed. + * + * @note The default is @p FALSE. + * @note The stack check is performed in a architecture/port dependent way. + * It may not be implemented or some ports. + * @note The default failure mode is to halt the system with the global + * @p panic_msg variable set to @p NULL. + */ +#if !defined(CH_DBG_ENABLE_STACK_CHECK) || defined(__DOXYGEN__) +#define CH_DBG_ENABLE_STACK_CHECK FALSE +#endif + +/** + * @brief Debug option, stacks initialization. + * @details If enabled then the threads working area is filled with a byte + * value when a thread is created. This can be useful for the + * runtime measurement of the used stack. + * + * @note The default is @p FALSE. + */ +#if !defined(CH_DBG_FILL_THREADS) || defined(__DOXYGEN__) +#define CH_DBG_FILL_THREADS FALSE +#endif + +/** + * @brief Debug option, threads profiling. + * @details If enabled then a field is added to the @p Thread structure that + * counts the system ticks occurred while executing the thread. + * + * @note The default is @p TRUE. + * @note This debug option is defaulted to TRUE because it is required by + * some test cases into the test suite. + */ +#if !defined(CH_DBG_THREADS_PROFILING) || defined(__DOXYGEN__) +#define CH_DBG_THREADS_PROFILING TRUE +#endif + +/** @} */ + +/*===========================================================================*/ +/** + * @name Kernel hooks + * @{ + */ +/*===========================================================================*/ + +/** + * @brief Threads descriptor structure extension. + * @details User fields added to the end of the @p Thread structure. + */ +#if !defined(THREAD_EXT_FIELDS) || defined(__DOXYGEN__) +#define THREAD_EXT_FIELDS \ + /* Add threads custom fields here.*/ +#endif + +/** + * @brief Threads initialization hook. + * @details User initialization code added to the @p chThdInit() API. + * + * @note It is invoked from within @p chThdInit() and implicitly from all + * the threads creation APIs. + */ +#if !defined(THREAD_EXT_INIT_HOOK) || defined(__DOXYGEN__) +#define THREAD_EXT_INIT_HOOK(tp) { \ + /* Add threads initialization code here.*/ \ +} +#endif + +/** + * @brief Threads finalization hook. + * @details User finalization code added to the @p chThdExit() API. + * + * @note It is inserted into lock zone. + * @note It is also invoked when the threads simply return in order to + * terminate. + */ +#if !defined(THREAD_EXT_EXIT_HOOK) || defined(__DOXYGEN__) +#define THREAD_EXT_EXIT_HOOK(tp) { \ + /* Add threads finalization code here.*/ \ +} +#endif + +/** + * @brief Context switch hook. + * @details This hook is invoked just before switching between threads. + */ +#if !defined(THREAD_CONTEXT_SWITCH_HOOK) || defined(__DOXYGEN__) +#define THREAD_CONTEXT_SWITCH_HOOK(ntp, otp) { \ + /* System halt code here.*/ \ +} +#endif + +/** + * @brief Idle Loop hook. + * @details This hook is continuously invoked by the idle thread loop. + */ +#if !defined(IDLE_LOOP_HOOK) || defined(__DOXYGEN__) +#define IDLE_LOOP_HOOK() { \ + /* Idle loop code here.*/ \ +} +#endif + +/** + * @brief System tick event hook. + * @details This hook is invoked in the system tick handler immediately + * after processing the virtual timers queue. + */ +#if !defined(SYSTEM_TICK_EVENT_HOOK) || defined(__DOXYGEN__) +#define SYSTEM_TICK_EVENT_HOOK() { \ + /* System tick event code here.*/ \ +} +#endif + +/** + * @brief System halt hook. + * @details This hook is invoked in case to a system halting error before + * the system is halted. + */ +#if !defined(SYSTEM_HALT_HOOK) || defined(__DOXYGEN__) +#define SYSTEM_HALT_HOOK() { \ + /* System halt code here.*/ \ +} +#endif + +/** @} */ + +/*===========================================================================*/ +/* Port-specific settings (override port settings defaulted in chcore.h). */ +/*===========================================================================*/ + +#endif /* _CHCONF_H_ */ + +/** @} */ diff --git a/06-TouchScreen/halconf.h b/06-TouchScreen/halconf.h new file mode 100644 index 0000000..8fc799c --- /dev/null +++ b/06-TouchScreen/halconf.h @@ -0,0 +1,349 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, + 2011,2012 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + + --- + + A special exception to the GPL can be applied should you wish to distribute + a combined work that includes ChibiOS/RT, without being obliged to provide + the source code for any proprietary components. See the file exception.txt + for full details of how and when the exception can be applied. +*/ + +/** + * @file templates/halconf.h + * @brief HAL configuration header. + * @details HAL configuration file, this file allows to enable or disable the + * various device drivers from your application. You may also use + * this file in order to override the device drivers default settings. + * + * @addtogroup HAL_CONF + * @{ + */ + +#ifndef _HALCONF_H_ +#define _HALCONF_H_ + +#include "mcuconf.h" + +/** + * @brief Enables the TM subsystem. + */ +#if !defined(HAL_USE_TM) || defined(__DOXYGEN__) +#define HAL_USE_TM FALSE +#endif + +/** + * @brief Enables the PAL subsystem. + */ +#if !defined(HAL_USE_PAL) || defined(__DOXYGEN__) +#define HAL_USE_PAL TRUE +#endif + +/** + * @brief Enables the ADC subsystem. + */ +#if !defined(HAL_USE_ADC) || defined(__DOXYGEN__) +#define HAL_USE_ADC FALSE +#endif + +/** + * @brief Enables the CAN subsystem. + */ +#if !defined(HAL_USE_CAN) || defined(__DOXYGEN__) +#define HAL_USE_CAN FALSE +#endif + +/** + * @brief Enables the EXT subsystem. + */ +#if !defined(HAL_USE_EXT) || defined(__DOXYGEN__) +#define HAL_USE_EXT TRUE +#endif + +/** + * @brief Enables the GPT subsystem. + */ +#if !defined(HAL_USE_GPT) || defined(__DOXYGEN__) +#define HAL_USE_GPT FALSE +#endif + +/** + * @brief Enables the I2C subsystem. + */ +#if !defined(HAL_USE_I2C) || defined(__DOXYGEN__) +#define HAL_USE_I2C FALSE +#endif + +/** + * @brief Enables the ICU subsystem. + */ +#if !defined(HAL_USE_ICU) || defined(__DOXYGEN__) +#define HAL_USE_ICU FALSE +#endif + +/** + * @brief Enables the MAC subsystem. + */ +#if !defined(HAL_USE_MAC) || defined(__DOXYGEN__) +#define HAL_USE_MAC FALSE +#endif + +/** + * @brief Enables the MMC_SPI subsystem. + */ +#if !defined(HAL_USE_MMC_SPI) || defined(__DOXYGEN__) +#define HAL_USE_MMC_SPI FALSE +#endif + +/** + * @brief Enables the PWM subsystem. + */ +#if !defined(HAL_USE_PWM) || defined(__DOXYGEN__) +#define HAL_USE_PWM FALSE +#endif + +/** + * @brief Enables the RTC subsystem. + */ +#if !defined(HAL_USE_RTC) || defined(__DOXYGEN__) +#define HAL_USE_RTC FALSE +#endif + +/** + * @brief Enables the SDC subsystem. + */ +#if !defined(HAL_USE_SDC) || defined(__DOXYGEN__) +#define HAL_USE_SDC FALSE +#endif + +/** + * @brief Enables the SERIAL subsystem. + */ +#if !defined(HAL_USE_SERIAL) || defined(__DOXYGEN__) +#define HAL_USE_SERIAL FALSE +#endif + +/** + * @brief Enables the SERIAL over USB subsystem. + */ +#if !defined(HAL_USE_SERIAL_USB) || defined(__DOXYGEN__) +#define HAL_USE_SERIAL_USB FALSE +#endif + +/** + * @brief Enables the SPI subsystem. + */ +#if !defined(HAL_USE_SPI) || defined(__DOXYGEN__) +#define HAL_USE_SPI TRUE +#endif + +/** + * @brief Enables the UART subsystem. + */ +#if !defined(HAL_USE_UART) || defined(__DOXYGEN__) +#define HAL_USE_UART FALSE +#endif + +/** + * @brief Enables the USB subsystem. + */ +#if !defined(HAL_USE_USB) || defined(__DOXYGEN__) +#define HAL_USE_USB FALSE +#endif + +/*===========================================================================*/ +/* ADC driver related settings. */ +/*===========================================================================*/ + +/** + * @brief Enables synchronous APIs. + * @note Disabling this option saves both code and data space. + */ +#if !defined(ADC_USE_WAIT) || defined(__DOXYGEN__) +#define ADC_USE_WAIT TRUE +#endif + +/** + * @brief Enables the @p adcAcquireBus() and @p adcReleaseBus() APIs. + * @note Disabling this option saves both code and data space. + */ +#if !defined(ADC_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__) +#define ADC_USE_MUTUAL_EXCLUSION TRUE +#endif + +/*===========================================================================*/ +/* CAN driver related settings. */ +/*===========================================================================*/ + +/** + * @brief Sleep mode related APIs inclusion switch. + */ +#if !defined(CAN_USE_SLEEP_MODE) || defined(__DOXYGEN__) +#define CAN_USE_SLEEP_MODE TRUE +#endif + +/*===========================================================================*/ +/* I2C driver related settings. */ +/*===========================================================================*/ + +/** + * @brief Enables the mutual exclusion APIs on the I2C bus. + */ +#if !defined(I2C_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__) +#define I2C_USE_MUTUAL_EXCLUSION TRUE +#endif + +/*===========================================================================*/ +/* MAC driver related settings. */ +/*===========================================================================*/ + +/** + * @brief Enables an event sources for incoming packets. + */ +#if !defined(MAC_USE_EVENTS) || defined(__DOXYGEN__) +#define MAC_USE_EVENTS TRUE +#endif + +/*===========================================================================*/ +/* MMC_SPI driver related settings. */ +/*===========================================================================*/ + +/** + * @brief Block size for MMC transfers. + */ +#if !defined(MMC_SECTOR_SIZE) || defined(__DOXYGEN__) +#define MMC_SECTOR_SIZE 512 +#endif + +/** + * @brief Delays insertions. + * @details If enabled this options inserts delays into the MMC waiting + * routines releasing some extra CPU time for the threads with + * lower priority, this may slow down the driver a bit however. + * This option is recommended also if the SPI driver does not + * use a DMA channel and heavily loads the CPU. + */ +#if !defined(MMC_NICE_WAITING) || defined(__DOXYGEN__) +#define MMC_NICE_WAITING TRUE +#endif + +/** + * @brief Number of positive insertion queries before generating the + * insertion event. + */ +#if !defined(MMC_POLLING_INTERVAL) || defined(__DOXYGEN__) +#define MMC_POLLING_INTERVAL 10 +#endif + +/** + * @brief Interval, in milliseconds, between insertion queries. + */ +#if !defined(MMC_POLLING_DELAY) || defined(__DOXYGEN__) +#define MMC_POLLING_DELAY 10 +#endif + +/** + * @brief Uses the SPI polled API for small data transfers. + * @details Polled transfers usually improve performance because it + * saves two context switches and interrupt servicing. Note + * that this option has no effect on large transfers which + * are always performed using DMAs/IRQs. + */ +#if !defined(MMC_USE_SPI_POLLING) || defined(__DOXYGEN__) +#define MMC_USE_SPI_POLLING TRUE +#endif + +/*===========================================================================*/ +/* SDC driver related settings. */ +/*===========================================================================*/ + +/** + * @brief Number of initialization attempts before rejecting the card. + * @note Attempts are performed at 10mS intervals. + */ +#if !defined(SDC_INIT_RETRY) || defined(__DOXYGEN__) +#define SDC_INIT_RETRY 100 +#endif + +/** + * @brief Include support for MMC cards. + * @note MMC support is not yet implemented so this option must be kept + * at @p FALSE. + */ +#if !defined(SDC_MMC_SUPPORT) || defined(__DOXYGEN__) +#define SDC_MMC_SUPPORT FALSE +#endif + +/** + * @brief Delays insertions. + * @details If enabled this options inserts delays into the MMC waiting + * routines releasing some extra CPU time for the threads with + * lower priority, this may slow down the driver a bit however. + */ +#if !defined(SDC_NICE_WAITING) || defined(__DOXYGEN__) +#define SDC_NICE_WAITING TRUE +#endif + +/*===========================================================================*/ +/* SERIAL driver related settings. */ +/*===========================================================================*/ + +/** + * @brief Default bit rate. + * @details Configuration parameter, this is the baud rate selected for the + * default configuration. + */ +#if !defined(SERIAL_DEFAULT_BITRATE) || defined(__DOXYGEN__) +#define SERIAL_DEFAULT_BITRATE 38400 +#endif + +/** + * @brief Serial buffers size. + * @details Configuration parameter, you can change the depth of the queue + * buffers depending on the requirements of your application. + * @note The default is 64 bytes for both the transmission and receive + * buffers. + */ +#if !defined(SERIAL_BUFFERS_SIZE) || defined(__DOXYGEN__) +#define SERIAL_BUFFERS_SIZE 16 +#endif + +/*===========================================================================*/ +/* SPI driver related settings. */ +/*===========================================================================*/ + +/** + * @brief Enables synchronous APIs. + * @note Disabling this option saves both code and data space. + */ +#if !defined(SPI_USE_WAIT) || defined(__DOXYGEN__) +#define SPI_USE_WAIT TRUE +#endif + +/** + * @brief Enables the @p spiAcquireBus() and @p spiReleaseBus() APIs. + * @note Disabling this option saves both code and data space. + */ +#if !defined(SPI_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__) +#define SPI_USE_MUTUAL_EXCLUSION FALSE +#endif + +#endif /* _HALCONF_H_ */ + +/** @} */ diff --git a/06-TouchScreen/main.c b/06-TouchScreen/main.c new file mode 100644 index 0000000..3458cd7 --- /dev/null +++ b/06-TouchScreen/main.c @@ -0,0 +1,117 @@ +#include "ch.h" +#include "hal.h" + +#include "xpt2046.h" + + +// This is called when the board boots up with the user button pressed. The +// idea is to enter this mode if the wrong SPI device has been used and flashing +// is no longer possible. +__attribute__ ((noreturn)) +static void lockdown( void ) +{ + palSetPad( GPIOD , GPIOD_LED5 ); + while (TRUE) { + // EMPTY + } +} + + +static void checkTouchScreen( void ) +{ + int x , y; + if ( ! xpt2046GetAverageCoordinates( &x , &y , 3 ) ) { + return; + } + + palClearPad( GPIOD , GPIOD_LED4 ); + chThdSleep( 500 ); + int mask = 0x800; + while ( mask != 0 ) { + palTogglePad( GPIOD , GPIOD_LED5 ); + if ( ( x & mask ) != 0 ) { + palSetPad( GPIOD , GPIOD_LED3 ); + } else { + palClearPad( GPIOD , GPIOD_LED3 ); + } + if ( ( y & mask ) != 0 ) { + palSetPad( GPIOD , GPIOD_LED6 ); + } else { + palClearPad( GPIOD , GPIOD_LED6 ); + } + mask >>= 1; + + chThdSleep( 250 ); + palTogglePad( GPIOD , GPIOD_LED5 ); + palClearPad( GPIOD , GPIOD_LED3 ); + palClearPad( GPIOD , GPIOD_LED6 ); + chThdSleep( 250 ); + } +} + + +static int tryReading; + +static void onTouchscreenIRQ( EXTDriver * driver __attribute__((unused)) , + expchannel_t channel __attribute__((unused)) ) +{ + tryReading = TRUE; +} + + +#define PORT(P) \ + case (int) GPIO##P : \ + port = EXT_MODE_GPIO##P; \ + break; + +static void initIRQs( void ) +{ + EXTConfig config; + u32 i; + + for ( i = 0 ; i < EXT_MAX_CHANNELS ; i ++ ) { + if ( i == XPT2046_IRQ_PAD ) { + int port; + switch ( (int) XPT2046_IRQ_PORT ) { + default: PORT(A); PORT(B); + PORT(C); PORT(D); PORT(E); + PORT(F); PORT(G); PORT(H); + } + config.channels[ i ].mode = EXT_CH_MODE_FALLING_EDGE + | EXT_CH_MODE_AUTOSTART | port; + config.channels[ i ].cb = &onTouchscreenIRQ; + } else { + config.channels[ i ].mode = EXT_CH_MODE_DISABLED; + config.channels[ i ].cb = NULL; + } + } + extStart( &EXTD1 , &config ); +} + + + +int main( void ) +{ + halInit(); + chSysInit(); + + if ( palReadPad( GPIOA , GPIOA_BUTTON ) ) { + lockdown( ); + } + + xpt2046Init( ); + initIRQs(); + + palSetPad( GPIOD , GPIOD_LED4 ); + while (TRUE) { + if ( tryReading ) { + checkTouchScreen( ); + tryReading = FALSE; + } + + chThdSleep( 25 ); + palClearPad( GPIOD , GPIOD_LED4 ); + chThdSleep( 25 ); + palSetPad( GPIOD , GPIOD_LED4 ); + } +} diff --git a/06-TouchScreen/mcuconf.h b/06-TouchScreen/mcuconf.h new file mode 100644 index 0000000..c7c66c3 --- /dev/null +++ b/06-TouchScreen/mcuconf.h @@ -0,0 +1,257 @@ +/* + ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, + 2011,2012 Giovanni Di Sirio. + + This file is part of ChibiOS/RT. + + ChibiOS/RT is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + ChibiOS/RT is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +/* + * STM32F4xx drivers configuration. + * The following settings override the default settings present in + * the various device driver implementation headers. + * Note that the settings for each driver only have effect if the whole + * driver is enabled in halconf.h. + * + * IRQ priorities: + * 15...0 Lowest...Highest. + * + * DMA priorities: + * 0...3 Lowest...Highest. + */ + +#define STM32F4xx_MCUCONF + +/* + * HAL driver system settings. + */ +#define STM32_NO_INIT FALSE +#define STM32_HSI_ENABLED TRUE +#define STM32_LSI_ENABLED TRUE +#define STM32_HSE_ENABLED TRUE +#define STM32_LSE_ENABLED FALSE +#define STM32_CLOCK48_REQUIRED TRUE +#define STM32_SW STM32_SW_PLL +#define STM32_PLLSRC STM32_PLLSRC_HSE +#define STM32_PLLM_VALUE 8 +#define STM32_PLLN_VALUE 336 +#define STM32_PLLP_VALUE 2 +#define STM32_PLLQ_VALUE 7 +#define STM32_HPRE STM32_HPRE_DIV1 +#define STM32_PPRE1 STM32_PPRE1_DIV4 +#define STM32_PPRE2 STM32_PPRE2_DIV2 +#define STM32_RTCSEL STM32_RTCSEL_LSI +#define STM32_RTCPRE_VALUE 8 +#define STM32_MCO1SEL STM32_MCO1SEL_HSI +#define STM32_MCO1PRE STM32_MCO1PRE_DIV1 +#define STM32_MCO2SEL STM32_MCO2SEL_SYSCLK +#define STM32_MCO2PRE STM32_MCO2PRE_DIV5 +#define STM32_I2SSRC STM32_I2SSRC_CKIN +#define STM32_PLLI2SN_VALUE 192 +#define STM32_PLLI2SR_VALUE 5 +#define STM32_VOS STM32_VOS_HIGH +#define STM32_PVD_ENABLE FALSE +#define STM32_PLS STM32_PLS_LEV0 + +/* + * ADC driver system settings. + */ +#define STM32_ADC_ADCPRE ADC_CCR_ADCPRE_DIV4 +#define STM32_ADC_USE_ADC1 FALSE +#define STM32_ADC_USE_ADC2 FALSE +#define STM32_ADC_USE_ADC3 FALSE +#define STM32_ADC_ADC1_DMA_STREAM STM32_DMA_STREAM_ID(2, 4) +#define STM32_ADC_ADC2_DMA_STREAM STM32_DMA_STREAM_ID(2, 2) +#define STM32_ADC_ADC3_DMA_STREAM STM32_DMA_STREAM_ID(2, 1) +#define STM32_ADC_ADC1_DMA_PRIORITY 2 +#define STM32_ADC_ADC2_DMA_PRIORITY 2 +#define STM32_ADC_ADC3_DMA_PRIORITY 2 +#define STM32_ADC_IRQ_PRIORITY 6 +#define STM32_ADC_ADC1_DMA_IRQ_PRIORITY 6 +#define STM32_ADC_ADC2_DMA_IRQ_PRIORITY 6 +#define STM32_ADC_ADC3_DMA_IRQ_PRIORITY 6 + +/* + * CAN driver system settings. + */ +#define STM32_CAN_USE_CAN1 FALSE +#define STM32_CAN_USE_CAN2 FALSE +#define STM32_CAN_CAN1_IRQ_PRIORITY 11 +#define STM32_CAN_CAN2_IRQ_PRIORITY 11 + +/* + * EXT driver system settings. + */ +#define STM32_EXT_EXTI0_IRQ_PRIORITY 6 +#define STM32_EXT_EXTI1_IRQ_PRIORITY 6 +#define STM32_EXT_EXTI2_IRQ_PRIORITY 6 +#define STM32_EXT_EXTI3_IRQ_PRIORITY 6 +#define STM32_EXT_EXTI4_IRQ_PRIORITY 6 +#define STM32_EXT_EXTI5_9_IRQ_PRIORITY 6 +#define STM32_EXT_EXTI10_15_IRQ_PRIORITY 6 +#define STM32_EXT_EXTI16_IRQ_PRIORITY 6 +#define STM32_EXT_EXTI17_IRQ_PRIORITY 15 +#define STM32_EXT_EXTI18_IRQ_PRIORITY 6 +#define STM32_EXT_EXTI19_IRQ_PRIORITY 6 +#define STM32_EXT_EXTI20_IRQ_PRIORITY 6 +#define STM32_EXT_EXTI21_IRQ_PRIORITY 15 +#define STM32_EXT_EXTI22_IRQ_PRIORITY 15 + +/* + * GPT driver system settings. + */ +#define STM32_GPT_USE_TIM1 FALSE +#define STM32_GPT_USE_TIM2 FALSE +#define STM32_GPT_USE_TIM3 FALSE +#define STM32_GPT_USE_TIM4 FALSE +#define STM32_GPT_USE_TIM5 FALSE +#define STM32_GPT_USE_TIM8 FALSE +#define STM32_GPT_TIM1_IRQ_PRIORITY 7 +#define STM32_GPT_TIM2_IRQ_PRIORITY 7 +#define STM32_GPT_TIM3_IRQ_PRIORITY 7 +#define STM32_GPT_TIM4_IRQ_PRIORITY 7 +#define STM32_GPT_TIM5_IRQ_PRIORITY 7 +#define STM32_GPT_TIM8_IRQ_PRIORITY 7 + +/* + * I2C driver system settings. + */ +#define STM32_I2C_USE_I2C1 FALSE +#define STM32_I2C_USE_I2C2 FALSE +#define STM32_I2C_USE_I2C3 FALSE +#define STM32_I2C_I2C1_RX_DMA_STREAM STM32_DMA_STREAM_ID(1, 0) +#define STM32_I2C_I2C1_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 6) +#define STM32_I2C_I2C2_RX_DMA_STREAM STM32_DMA_STREAM_ID(1, 2) +#define STM32_I2C_I2C2_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 7) +#define STM32_I2C_I2C3_RX_DMA_STREAM STM32_DMA_STREAM_ID(1, 2) +#define STM32_I2C_I2C3_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 4) +#define STM32_I2C_I2C1_IRQ_PRIORITY 5 +#define STM32_I2C_I2C2_IRQ_PRIORITY 5 +#define STM32_I2C_I2C3_IRQ_PRIORITY 5 +#define STM32_I2C_I2C1_DMA_PRIORITY 3 +#define STM32_I2C_I2C2_DMA_PRIORITY 3 +#define STM32_I2C_I2C3_DMA_PRIORITY 3 +#define STM32_I2C_I2C1_DMA_ERROR_HOOK() chSysHalt() +#define STM32_I2C_I2C2_DMA_ERROR_HOOK() chSysHalt() +#define STM32_I2C_I2C3_DMA_ERROR_HOOK() chSysHalt() + +/* + * ICU driver system settings. + */ +#define STM32_ICU_USE_TIM1 FALSE +#define STM32_ICU_USE_TIM2 FALSE +#define STM32_ICU_USE_TIM3 FALSE +#define STM32_ICU_USE_TIM4 FALSE +#define STM32_ICU_USE_TIM5 FALSE +#define STM32_ICU_USE_TIM8 FALSE +#define STM32_ICU_TIM1_IRQ_PRIORITY 7 +#define STM32_ICU_TIM2_IRQ_PRIORITY 7 +#define STM32_ICU_TIM3_IRQ_PRIORITY 7 +#define STM32_ICU_TIM4_IRQ_PRIORITY 7 +#define STM32_ICU_TIM5_IRQ_PRIORITY 7 +#define STM32_ICU_TIM8_IRQ_PRIORITY 7 + +/* + * PWM driver system settings. + */ +#define STM32_PWM_USE_ADVANCED FALSE +#define STM32_PWM_USE_TIM1 FALSE +#define STM32_PWM_USE_TIM2 FALSE +#define STM32_PWM_USE_TIM3 FALSE +#define STM32_PWM_USE_TIM4 FALSE +#define STM32_PWM_USE_TIM5 FALSE +#define STM32_PWM_USE_TIM8 FALSE +#define STM32_PWM_TIM1_IRQ_PRIORITY 7 +#define STM32_PWM_TIM2_IRQ_PRIORITY 7 +#define STM32_PWM_TIM3_IRQ_PRIORITY 7 +#define STM32_PWM_TIM4_IRQ_PRIORITY 7 +#define STM32_PWM_TIM5_IRQ_PRIORITY 7 +#define STM32_PWM_TIM8_IRQ_PRIORITY 7 + +/* + * SERIAL driver system settings. + */ +#define STM32_SERIAL_USE_USART1 FALSE +#define STM32_SERIAL_USE_USART2 FALSE +#define STM32_SERIAL_USE_USART3 FALSE +#define STM32_SERIAL_USE_UART4 FALSE +#define STM32_SERIAL_USE_UART5 FALSE +#define STM32_SERIAL_USE_USART6 FALSE +#define STM32_SERIAL_USART1_PRIORITY 12 +#define STM32_SERIAL_USART2_PRIORITY 12 +#define STM32_SERIAL_USART3_PRIORITY 12 +#define STM32_SERIAL_UART4_PRIORITY 12 +#define STM32_SERIAL_UART5_PRIORITY 12 +#define STM32_SERIAL_USART6_PRIORITY 12 + +/* + * SPI driver system settings. + */ +#define STM32_SPI_USE_SPI1 TRUE +#define STM32_SPI_USE_SPI2 FALSE +#define STM32_SPI_USE_SPI3 FALSE +#define STM32_SPI_SPI1_RX_DMA_STREAM STM32_DMA_STREAM_ID(2, 0) +#define STM32_SPI_SPI1_TX_DMA_STREAM STM32_DMA_STREAM_ID(2, 3) +#define STM32_SPI_SPI2_RX_DMA_STREAM STM32_DMA_STREAM_ID(1, 3) +#define STM32_SPI_SPI2_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 4) +#define STM32_SPI_SPI3_RX_DMA_STREAM STM32_DMA_STREAM_ID(1, 0) +#define STM32_SPI_SPI3_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 7) +#define STM32_SPI_SPI1_DMA_PRIORITY 1 +#define STM32_SPI_SPI2_DMA_PRIORITY 1 +#define STM32_SPI_SPI3_DMA_PRIORITY 1 +#define STM32_SPI_SPI1_IRQ_PRIORITY 10 +#define STM32_SPI_SPI2_IRQ_PRIORITY 10 +#define STM32_SPI_SPI3_IRQ_PRIORITY 10 +#define STM32_SPI_DMA_ERROR_HOOK(spip) chSysHalt() + +/* + * UART driver system settings. + */ +#define STM32_UART_USE_USART1 FALSE +#define STM32_UART_USE_USART2 FALSE +#define STM32_UART_USE_USART3 FALSE +#define STM32_UART_USE_USART6 FALSE +#define STM32_UART_USART1_RX_DMA_STREAM STM32_DMA_STREAM_ID(2, 5) +#define STM32_UART_USART1_TX_DMA_STREAM STM32_DMA_STREAM_ID(2, 7) +#define STM32_UART_USART2_RX_DMA_STREAM STM32_DMA_STREAM_ID(1, 5) +#define STM32_UART_USART2_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 6) +#define STM32_UART_USART3_RX_DMA_STREAM STM32_DMA_STREAM_ID(1, 1) +#define STM32_UART_USART3_TX_DMA_STREAM STM32_DMA_STREAM_ID(1, 3) +#define STM32_UART_USART6_RX_DMA_STREAM STM32_DMA_STREAM_ID(2, 2) +#define STM32_UART_USART6_TX_DMA_STREAM STM32_DMA_STREAM_ID(2, 7) +#define STM32_UART_USART1_IRQ_PRIORITY 12 +#define STM32_UART_USART2_IRQ_PRIORITY 12 +#define STM32_UART_USART3_IRQ_PRIORITY 12 +#define STM32_UART_USART6_IRQ_PRIORITY 12 +#define STM32_UART_USART1_DMA_PRIORITY 0 +#define STM32_UART_USART2_DMA_PRIORITY 0 +#define STM32_UART_USART3_DMA_PRIORITY 0 +#define STM32_UART_USART6_DMA_PRIORITY 0 +#define STM32_UART_DMA_ERROR_HOOK(uartp) chSysHalt() + +/* + * USB driver system settings. + */ +#define STM32_USB_USE_OTG1 FALSE +#define STM32_USB_USE_OTG2 FALSE +#define STM32_USB_OTG1_IRQ_PRIORITY 14 +#define STM32_USB_OTG2_IRQ_PRIORITY 14 +#define STM32_USB_OTG1_RX_FIFO_SIZE 512 +#define STM32_USB_OTG2_RX_FIFO_SIZE 1024 +#define STM32_USB_OTG_THREAD_PRIO LOWPRIO +#define STM32_USB_OTG_THREAD_STACK_SIZE 128 +#define STM32_USB_OTGFIFO_FILL_BASEPRI 0 + + diff --git a/06-TouchScreen/xpt2046.c b/06-TouchScreen/xpt2046.c new file mode 100644 index 0000000..ff552e6 --- /dev/null +++ b/06-TouchScreen/xpt2046.c @@ -0,0 +1,125 @@ +#include "ch.h" +#include "hal.h" + +#include "xpt2046.h" + +static const SPIConfig _xpt2046_spi_config = { + NULL , + XPT2046_NSS_PORT , + XPT2046_NSS_PAD , + SPI_CR1_BR_2 | SPI_CR1_BR_1 | SPI_CR1_BR_0 +}; + + + +u16 _xpt2046_get_reading( u8 control ) +{ + u8 tData[3] = { control , 0 , 0 }; + u8 rData[3] = { 0 , 0 , 0 }; + +#if SPI_USE_MUTUAL_EXCLUSION + spiAcquireBus( &( XPT2046_SPI_DRIVER ) ); +#endif + + palClearPad( XPT2046_NSS_PORT , XPT2046_NSS_PAD ); + spiExchange( &( XPT2046_SPI_DRIVER ) , 3 , tData , rData ); + palSetPad( XPT2046_NSS_PORT , XPT2046_NSS_PAD ); + +#if SPI_USE_MUTUAL_EXCLUSION + spiReleaseBus( &( XPT2046_SPI_DRIVER ) ); +#endif + + if ( ( control & 0x08 ) == 0 ) { + return ( rData[1] << 5 ) | ( rData[2] >> 3 ); + } + return ( rData[1] << 4 ) | ( rData[2] >> 4 ); +} + + + +void xpt2046Init( void ) +{ + // Initialise SPI + spiStart( &( XPT2046_SPI_DRIVER ) , &_xpt2046_spi_config ); + + // NSS signal + palSetPadMode( XPT2046_NSS_PORT , XPT2046_NSS_PAD , + PAL_MODE_OUTPUT_PUSHPULL ); + palSetPad( XPT2046_NSS_PORT , XPT2046_NSS_PAD ); + + // Main SPI signals + palSetPadMode( XPT2046_CLK_PORT , XPT2046_CLK_PAD , + PAL_MODE_ALTERNATE( 5 ) ); + palSetPadMode( XPT2046_DIN_PORT , XPT2046_DIN_PAD , + PAL_MODE_ALTERNATE( 5 ) ); + palSetPadMode( XPT2046_DOUT_PORT , XPT2046_DOUT_PAD , + PAL_MODE_ALTERNATE( 5 ) ); + + // PENIRQ signal + palSetPadMode( XPT2046_IRQ_PORT , XPT2046_IRQ_PAD , PAL_MODE_INPUT ); + + // Read a sample, leaving PENIRQ active + _xpt2046_get_reading( 0x90 ); +} + + +int xpt2046GetCoordinates( int * pX , int * pY ) +{ + int i; + int allX[ 7 ] , allY[ 7 ]; + _xpt2046_get_reading( 0xd1 ); + _xpt2046_get_reading( 0x91 ); + for ( i = 0 ; i < 7 ; i ++ ) { + allX[ i ] = _xpt2046_get_reading( 0xd1 ); + allY[ i ] = _xpt2046_get_reading( 0x91 ); + } + + int j; + for ( i = 0 ; i < 4 ; i ++ ) { + for ( j = i ; j < 7 ; j ++ ) { + int temp = allX[ i ]; + if ( temp > allX[ j ] ) { + allX[ i ] = allX[ j ]; + allX[ j ] = temp; + } + temp = allY[ i ]; + if ( temp > allY[ j ] ) { + allY[ i ] = allY[ j ]; + allY[ j ] = temp; + } + } + } + _xpt2046_get_reading( 0x90 ); + + if ( palReadPad( XPT2046_IRQ_PORT , XPT2046_IRQ_PAD ) ) { + return 0; + } + + *pX = allX[ 3 ]; + *pY = allY[ 3 ]; + + return 1; +} + +int xpt2046GetAverageCoordinates( int * pX , int * pY , int nSamples ) +{ + int nRead = 0; + int xAcc = 0 , yAcc = 0; + int x , y; + + while ( nRead < nSamples ) { + if ( !xpt2046GetCoordinates( &x , &y ) ) { + break; + } + xAcc += x; + yAcc += y; + nRead ++; + } + + if ( nRead == 0 ) { + return 0; + } + *pX = xAcc / nRead; + *pY = yAcc / nRead; + return 1; +} diff --git a/06-TouchScreen/xpt2046.h b/06-TouchScreen/xpt2046.h new file mode 100644 index 0000000..640b8e0 --- /dev/null +++ b/06-TouchScreen/xpt2046.h @@ -0,0 +1,31 @@ +#ifndef _H_XPT2046_STM32F4 +#define _H_XPT2046_STM32F4 + + +// Ports and controllers for the various touchscreen pins +// IRQ (any port will do) +#define XPT2046_IRQ_PORT GPIOC +#define XPT2046_IRQ_PAD 4 +// NSS (any port will do, this is done manually) +#define XPT2046_NSS_PORT GPIOA +#define XPT2046_NSS_PAD 4 +// CLK (must be a SPI clock port) +#define XPT2046_CLK_PORT GPIOA +#define XPT2046_CLK_PAD 5 +// DIN (must be a SPI MOSI port) +#define XPT2046_DIN_PORT GPIOA +#define XPT2046_DIN_PAD 7 +// DOUT (must be a SPI MISO port) +#define XPT2046_DOUT_PORT GPIOA +#define XPT2046_DOUT_PAD 6 + +// SPI driver to use +#define XPT2046_SPI_DRIVER SPID1 + + +void xpt2046Init( void ); +int xpt2046GetCoordinates( int * pX , int * pY ); +int xpt2046GetAverageCoordinates( int * pX , int * pY , int nSamples ); + + +#endif //_H_XPT2046_STM32F4