Example spi board config for ILI9341

1 files changed, 222 insertions, 0 deletions

diff --git a/boards/addons/gdisp/board_ILI9341_spi.h b/boards/addons/gdisp/board_ILI9341_spi.h
new file mode 100644
index 00000000..4b3b058d
--- /dev/null
+++ b/boards/addons/gdisp/board_ILI9341_spi.h
@@ -0,0 +1,222 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/**
+ * @file    boards/addons/gdisp/board_ILI9341_spi.h
+ * @brief   GDISP Graphic Driver subsystem board interface for the ILI9341 display.
+ *
+ * @note	This file contains a mix of hardware specific and operating system specific
+ *			code. You will need to change it for your CPU and/or operating system.
+ */
+
+#ifndef _GDISP_LLD_BOARD_H
+#define _GDISP_LLD_BOARD_H
+
+#define LCD_PORT	GPIOB
+#define LCD_MOSI	15
+#define LCD_MISO	14
+#define LCD_SCK		13
+#define LCD_CS		12
+#define LCD_DC		11
+#define LCD_RES		10
+
+#define LCD_DC_CMD	palClearPad(LCD_PORT, LCD_DC)
+#define LCD_DC_DATA	palSetPad(LCD_PORT, LCD_DC)
+#define LCD_SCK_SET	palSetPad(LCD_PORT, LCD_SCK)
+#define LCD_SCK_RES	palClearPad(LCD_PORT, LCD_SCK)
+#define LCD_CS_RES	palSetPad(LCD_PORT, LCD_CS)
+#define LCD_CS_SET	palClearPad(LCD_PORT, LCD_CS)
+
+/**
+ * SPI configuration structure.
+ * Speed 12 MHz, CPHA=0, CPOL=0, 8bits frames, MSb transmitted first.
+ * Soft slave select.
+ */
+static const SPIConfig spi2cfg = {
+  NULL,
+  LCD_PORT,
+  LCD_CS,
+  (SPI_CR1_MSTR | SPI_CR1_SPE | SPI_CR1_SSM | SPI_CR1_SSI)
+};
+
+static void send_data(uint16_t data);
+
+/**
+ * @brief   Initialise the board for the display.
+ *
+ * @param[in] g			The GDisplay structure
+ *
+ * @note	Set the g->board member to whatever is appropriate. For multiple
+ * 			displays this might be a pointer to the appropriate register set.
+ *
+ * @notapi
+ */
+static inline void init_board(GDisplay *g) {
+
+  // As we are not using multiple displays we set g->board to NULL as we don't use it.
+  g->board = 0;
+
+  palSetPadMode(LCD_PORT, LCD_CS, PAL_MODE_OUTPUT_PUSHPULL);
+  palSetPadMode(LCD_PORT, LCD_DC, PAL_MODE_OUTPUT_PUSHPULL);
+  palSetPadMode(LCD_PORT, LCD_RES, PAL_MODE_OUTPUT_PUSHPULL);
+
+  spiStart(&SPID2, &spi2cfg);
+  spiSelectI(&SPID2);
+}
+
+/**
+ * @brief   After the initialisation.
+ *
+ * @param[in] g			The GDisplay structure
+ *
+ * @notapi
+ */
+static inline void post_init_board(GDisplay *g) {
+	(void) g;
+}
+
+/**
+ * @brief   Set or clear the lcd reset pin.
+ *
+ * @param[in] g			The GDisplay structure
+ * @param[in] state		TRUE = lcd in reset, FALSE = normal operation
+ * 
+ * @notapi
+ */
+static inline void setpin_reset(GDisplay *g, bool_t state) {
+	(void) g;
+
+	if (state == TRUE) {
+		palClearPad(LCD_PORT, LCD_RES);
+	} else {
+		palSetPad(LCD_PORT, LCD_RES);
+	}
+}
+
+/**
+ * @brief   Set the lcd back-light level.
+ *
+ * @param[in] g				The GDisplay structure
+ * @param[in] percent		0 to 100%
+ * 
+ * @notapi
+ */
+static inline void set_backlight(GDisplay *g, uint8_t percent) {
+	(void) g;
+	(void) percent;
+}
+
+/**
+ * @brief   Take exclusive control of the bus
+ *
+ * @param[in] g				The GDisplay structure
+ *
+ * @notapi
+ */
+static inline void acquire_bus(GDisplay *g) {
+	(void) g;
+}
+
+/**
+ * @brief   Release exclusive control of the bus
+ *
+ * @param[in] g				The GDisplay structure
+ *
+ * @notapi
+ */
+static inline void release_bus(GDisplay *g) {
+	(void) g;
+}
+
+/**
+ * @brief   Send data to the lcd.
+ *
+ * @param[in] data			The data to send
+ * 
+ * @notapi
+ */
+static inline void send_data(uint16_t data) {
+// http://forum.easyelectronics.ru/viewtopic.php?p=262122#p262122
+  while (!(SPI2->SR & SPI_SR_TXE)); // при входе на отправку проверяем - а пустой ли SPI_DR
+  SPI2->DR = data; // загрузили в SPI_DR код команды
+
+}
+
+/**
+ * @brief   Send data to the index register.
+ *
+ * @param[in] g				The GDisplay structure
+ * @param[in] index			The index register to set
+ *
+ * @notapi
+ */
+static inline void write_index(GDisplay *g, uint16_t index) {
+	(void) g;
+
+  while (SPI2->SR & SPI_SR_BSY);
+  LCD_CS_RES;
+  LCD_DC_CMD; // переводим дисплей в режим команд
+  LCD_CS_SET;
+  send_data(index);
+  while (SPI2->SR & SPI_SR_BSY); // пока флаг установлен (==1) -- модуль SPI занят
+  /* лишний цикл ожидания окончания передачи команды позволяет в дальнейшем слать
+   * байты данных без ненужных ожиданий и задержек.
+   */
+  LCD_DC_DATA; // переводим дисплей в режим данных
+}
+
+/**
+ * @brief   Send data to the lcd with DC control.
+ *
+ * @param[in] g				The GDisplay structure
+ * @param[in] data			The data to send
+ * 
+ * @notapi
+ */
+static inline void write_data(GDisplay *g, uint16_t data) {
+	(void) g;
+
+  send_data(data);
+}
+
+/**
+ * @brief   Set the bus in read mode
+ *
+ * @param[in] g				The GDisplay structure
+ *
+ * @notapi
+ */
+static inline void setreadmode(GDisplay *g) {
+	(void) g;
+}
+
+/**
+ * @brief   Set the bus back into write mode
+ *
+ * @param[in] g				The GDisplay structure
+ *
+ * @notapi
+ */
+static inline void setwritemode(GDisplay *g) {
+	(void) g;
+}
+
+/**
+ * @brief   Read data from the lcd.
+ * @return	The data from the lcd
+ *
+ * @param[in] g				The GDisplay structure
+ *
+ * @notapi
+ */
+static inline uint16_t read_data(GDisplay *g) {
+	(void) g;
+	return 0;
+}
+
+#endif /* _GDISP_LLD_BOARD_H */
+