diff options
Diffstat (limited to 'demos/STM32/RT-STM32F429-DISCOVERY-DMA2D/ili9341.c')
| -rw-r--r-- | demos/STM32/RT-STM32F429-DISCOVERY-DMA2D/ili9341.c | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/demos/STM32/RT-STM32F429-DISCOVERY-DMA2D/ili9341.c b/demos/STM32/RT-STM32F429-DISCOVERY-DMA2D/ili9341.c new file mode 100644 index 0000000..f2efa8d --- /dev/null +++ b/demos/STM32/RT-STM32F429-DISCOVERY-DMA2D/ili9341.c @@ -0,0 +1,418 @@ +/*
+ Copyright (C) 2013-2015 Andrea Zoppi
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file ili9341.c
+ * @brief ILI9341 TFT LCD diaplay controller driver.
+ * @note Does not support multiple calling threads natively.
+ */
+
+#include "ch.h"
+#include "hal.h"
+#include "ili9341.h"
+
+/**
+ * @addtogroup ili9341
+ * @{
+ */
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+#if !ILI9341_USE_CHECKS && !defined(__DOXYGEN__)
+/* Disable checks as needed.*/
+
+#ifdef osalDbgCheck
+#undef osalDbgCheck
+#endif
+#define osalDbgCheck(c, func) { \
+ (void)(c), (void)__QUOTE_THIS(func)"()"; \
+}
+
+#ifdef osalDbgAssert
+#undef osalDbgAssert
+#endif
+#define osalDbgAssert(c, m, r) { \
+ (void)(c); \
+}
+
+#ifdef osalDbgCheckClassS
+#undef osalDbgCheckClassS
+#endif
+#define osalDbgCheckClassS() {}
+
+#ifdef osalDbgCheckClassS
+#undef osalDbgCheckClassS
+#endif
+#define osalDbgCheckClassI() {}
+
+#endif /* ILI9341_USE_CHECKS */
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/** @brief ILI9341D1 driver identifier.*/
+ILI9341Driver ILI9341D1;
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Initializes the standard part of a @p ILI9341Driver structure.
+ *
+ * @param[out] driverp pointer to the @p ILI9341Driver object
+ *
+ * @init
+ */
+void ili9341ObjectInit(ILI9341Driver *driverp) {
+
+ osalDbgCheck(driverp != NULL);
+
+ driverp->state = ILI9341_STOP;
+ driverp->config = NULL;
+#if (TRUE == ILI9341_USE_MUTUAL_EXCLUSION)
+#if (TRUE == CH_CFG_USE_MUTEXES)
+ chMtxObjectInit(&driverp->lock);
+#else
+ chSemObjectInit(&driverp->lock, 1);
+#endif
+#endif /* (TRUE == ILI9341_USE_MUTUAL_EXCLUSION) */
+}
+
+/**
+ * @brief Configures and activates the ILI9341 peripheral.
+ * @pre ILI9341 is stopped.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ * @param[in] configp pointer to the @p ILI9341Config object
+ *
+ * @api
+ */
+void ili9341Start(ILI9341Driver *driverp, const ILI9341Config *configp) {
+
+ chSysLock();
+ osalDbgCheck(driverp != NULL);
+ osalDbgCheck(configp != NULL);
+ osalDbgCheck(configp->spi != NULL);
+ osalDbgAssert(driverp->state == ILI9341_STOP, "invalid state");
+
+ spiSelectI(configp->spi);
+ spiUnselectI(configp->spi);
+ driverp->config = configp;
+ driverp->state = ILI9341_READY;
+ chSysUnlock();
+}
+
+/**
+ * @brief Deactivates the ILI9341 peripheral.
+ * @pre ILI9341 is ready.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ *
+ * @api
+ */
+void ili9341Stop(ILI9341Driver *driverp) {
+
+ chSysLock();
+ osalDbgCheck(driverp != NULL);
+ osalDbgAssert(driverp->state == ILI9341_READY, "invalid state");
+
+ driverp->state = ILI9341_STOP;
+ chSysUnlock();
+}
+
+#if ILI9341_USE_MUTUAL_EXCLUSION
+
+/**
+ * @brief Gains exclusive access to the ILI9341 module.
+ * @details This function tries to gain ownership to the ILI9341 module, if the
+ * module is already being used then the invoking thread is queued.
+ * @pre In order to use this function the option
+ * @p ILI9341_USE_MUTUAL_EXCLUSION must be enabled.
+ * @pre ILI9341 is ready.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ *
+ * @sclass
+ */
+void ili9341AcquireBusS(ILI9341Driver *driverp) {
+
+ osalDbgCheckClassS();
+ osalDbgCheck(driverp == &ILI9341D1);
+ osalDbgAssert(driverp->state == ILI9341_READY, "not ready");
+
+#if (TRUE == CH_CFG_USE_MUTEXES)
+ chMtxLockS(&driverp->lock);
+#else
+ chSemWaitS(&driverp->lock);
+#endif
+}
+
+/**
+ * @brief Gains exclusive access to the ILI9341 module.
+ * @details This function tries to gain ownership to the ILI9341 module, if the
+ * module is already being used then the invoking thread is queued.
+ * @pre In order to use this function the option
+ * @p ILI9341_USE_MUTUAL_EXCLUSION must be enabled.
+ * @pre ILI9341 is ready.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ *
+ * @api
+ */
+void ili9341AcquireBus(ILI9341Driver *driverp) {
+
+ chSysLock();
+ ili9341AcquireBusS(driverp);
+ chSysUnlock();
+}
+
+/**
+ * @brief Releases exclusive access to the ILI9341 module.
+ * @pre In order to use this function the option
+ * @p ILI9341_USE_MUTUAL_EXCLUSION must be enabled.
+ * @pre ILI9341 is ready.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ *
+ * @sclass
+ */
+void ili9341ReleaseBusS(ILI9341Driver *driverp) {
+
+ osalDbgCheckClassS();
+ osalDbgCheck(driverp == &ILI9341D1);
+ osalDbgAssert(driverp->state == ILI9341_READY, "not ready");
+
+#if (TRUE == CH_CFG_USE_MUTEXES)
+ chMtxUnlockS(&driverp->lock);
+#else
+ chSemSignalI(&driverp->lock);
+#endif
+}
+
+/**
+ * @brief Releases exclusive access to the ILI9341 module.
+ * @pre In order to use this function the option
+ * @p ILI9341_USE_MUTUAL_EXCLUSION must be enabled.
+ * @pre ILI9341 is ready.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ *
+ * @api
+ */
+void ili9341ReleaseBus(ILI9341Driver *driverp) {
+
+ chSysLock();
+ ili9341ReleaseBusS(driverp);
+ chSysUnlock();
+}
+
+#endif /* ILI9341_USE_MUTUAL_EXCLUSION */
+
+#if ILI9341_IM == ILI9341_IM_4LSI_1 /* 4-wire, half-duplex */
+
+/**
+ * @brief Asserts the slave select signal and prepares for transfers.
+ * @pre ILI9341 is ready.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ *
+ * @iclass
+ */
+void ili9341SelectI(ILI9341Driver *driverp) {
+
+ osalDbgCheckClassI();
+ osalDbgCheck(driverp != NULL);
+ osalDbgAssert(driverp->state == ILI9341_READY, "invalid state");
+
+ driverp->state = ILI9341_ACTIVE;
+ spiSelectI(driverp->config->spi);
+}
+
+/**
+ * @brief Asserts the slave select signal and prepares for transfers.
+ * @pre ILI9341 is ready.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ *
+ * @api
+ */
+void ili9341Select(ILI9341Driver *driverp) {
+
+ chSysLock();
+ ili9341SelectI(driverp);
+ chSysUnlock();
+}
+
+/**
+ * @brief Deasserts the slave select signal.
+ * @details The previously selected peripheral is unselected.
+ * @pre ILI9341 is active.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ *
+ * @iclass
+ */
+void ili9341UnselectI(ILI9341Driver *driverp) {
+
+ osalDbgCheckClassI();
+ osalDbgCheck(driverp != NULL);
+ osalDbgAssert(driverp->state == ILI9341_ACTIVE, "invalid state");
+
+ spiUnselectI(driverp->config->spi);
+ driverp->state = ILI9341_READY;
+}
+
+/**
+ * @brief Deasserts the slave select signal.
+ * @details The previously selected peripheral is unselected.
+ * @pre ILI9341 is active.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ *
+ * @iclass
+ */
+void ili9341Unselect(ILI9341Driver *driverp) {
+
+ chSysLock();
+ ili9341UnselectI(driverp);
+ chSysUnlock();
+}
+
+/**
+ * @brief Write command byte.
+ * @details Sends a command byte via SPI.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ * @param[in] cmd command byte
+ *
+ * @api
+ */
+void ili9341WriteCommand(ILI9341Driver *driverp, uint8_t cmd) {
+
+ osalDbgCheck(driverp != NULL);
+ osalDbgAssert(driverp->state == ILI9341_ACTIVE, "invalid state");
+
+ driverp->value = cmd;
+ palClearPad(driverp->config->dcx_port, driverp->config->dcx_pad); /* !Cmd */
+ spiSend(driverp->config->spi, 1, &driverp->value);
+}
+
+/**
+ * @brief Write data byte.
+ * @details Sends a data byte via SPI.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ * @param[in] value data byte
+ *
+ * @api
+ */
+void ili9341WriteByte(ILI9341Driver *driverp, uint8_t value) {
+
+ osalDbgCheck(driverp != NULL);
+ osalDbgAssert(driverp->state == ILI9341_ACTIVE, "invalid state");
+
+ driverp->value = value;
+ palSetPad(driverp->config->dcx_port, driverp->config->dcx_pad); /* Data */
+ spiSend(driverp->config->spi, 1, &driverp->value);
+}
+
+/**
+ * @brief Read data byte.
+ * @details Receives a data byte via SPI.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ *
+ * @return data byte
+ *
+ * @api
+ */
+uint8_t ili9341ReadByte(ILI9341Driver *driverp) {
+
+ osalDbgAssert(FALSE, "should not be used");
+
+ osalDbgCheck(driverp != NULL);
+ osalDbgAssert(driverp->state == ILI9341_ACTIVE, "invalid state");
+
+ palSetPad(driverp->config->dcx_port, driverp->config->dcx_pad); /* Data */
+ spiReceive(driverp->config->spi, 1, &driverp->value);
+ return driverp->value;
+}
+
+/**
+ * @brief Write data chunk.
+ * @details Sends a data chunk via SPI.
+ * @pre The chunk must be accessed by DMA.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ * @param[in] chunk chunk bytes
+ * @param[in] length chunk length
+ *
+ * @api
+ */
+void ili9341WriteChunk(ILI9341Driver *driverp, const uint8_t chunk[],
+ size_t length) {
+
+ osalDbgCheck(driverp != NULL);
+ osalDbgCheck(chunk != NULL);
+ osalDbgAssert(driverp->state == ILI9341_ACTIVE, "invalid state");
+
+ if (length != 0) {
+ palSetPad(driverp->config->dcx_port, driverp->config->dcx_pad); /* Data */
+ spiSend(driverp->config->spi, length, chunk);
+ }
+}
+
+/**
+ * @brief Read data chunk.
+ * @details Receives a data chunk via SPI.
+ * @pre The chunk must be accessed by DMA.
+ *
+ * @param[in] driverp pointer to the @p ILI9341Driver object
+ * @param[out] chunk chunk bytes
+ * @param[in] length chunk length
+ *
+ * @api
+ */
+void ili9341ReadChunk(ILI9341Driver *driverp, uint8_t chunk[],
+ size_t length) {
+
+ osalDbgCheck(driverp != NULL);
+ osalDbgCheck(chunk != NULL);
+ osalDbgAssert(driverp->state == ILI9341_ACTIVE, "invalid state");
+
+ if (length != 0) {
+ palSetPad(driverp->config->dcx_port, driverp->config->dcx_pad); /* Data */
+ spiReceive(driverp->config->spi, length, chunk);
+ }
+}
+
+#else /* ILI9341_IM == * */
+#error "Only the ILI9341_IM_4LSI_1 interface mode is currently supported"
+#endif /* ILI9341_IM == * */
+
+/** @} */
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