Example spi board config for ILI9341
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boards/addons/gdisp/board_ILI9341_spi.h
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boards/addons/gdisp/board_ILI9341_spi.h
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/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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*/
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/**
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* @file boards/addons/gdisp/board_ILI9341_spi.h
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* @brief GDISP Graphic Driver subsystem board interface for the ILI9341 display.
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*
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* @note This file contains a mix of hardware specific and operating system specific
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* code. You will need to change it for your CPU and/or operating system.
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*/
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#ifndef _GDISP_LLD_BOARD_H
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#define _GDISP_LLD_BOARD_H
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#define LCD_PORT GPIOB
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#define LCD_MOSI 15
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#define LCD_MISO 14
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#define LCD_SCK 13
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#define LCD_CS 12
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#define LCD_DC 11
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#define LCD_RES 10
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#define LCD_DC_CMD palClearPad(LCD_PORT, LCD_DC)
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#define LCD_DC_DATA palSetPad(LCD_PORT, LCD_DC)
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#define LCD_SCK_SET palSetPad(LCD_PORT, LCD_SCK)
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#define LCD_SCK_RES palClearPad(LCD_PORT, LCD_SCK)
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#define LCD_CS_RES palSetPad(LCD_PORT, LCD_CS)
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#define LCD_CS_SET palClearPad(LCD_PORT, LCD_CS)
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/**
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* SPI configuration structure.
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* Speed 12 MHz, CPHA=0, CPOL=0, 8bits frames, MSb transmitted first.
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* Soft slave select.
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*/
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static const SPIConfig spi2cfg = {
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NULL,
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LCD_PORT,
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LCD_CS,
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(SPI_CR1_MSTR | SPI_CR1_SPE | SPI_CR1_SSM | SPI_CR1_SSI)
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};
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static void send_data(uint16_t data);
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/**
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* @brief Initialise the board for the display.
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*
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* @param[in] g The GDisplay structure
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*
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* @note Set the g->board member to whatever is appropriate. For multiple
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* displays this might be a pointer to the appropriate register set.
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*
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* @notapi
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*/
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static inline void init_board(GDisplay *g) {
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// As we are not using multiple displays we set g->board to NULL as we don't use it.
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g->board = 0;
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palSetPadMode(LCD_PORT, LCD_CS, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(LCD_PORT, LCD_DC, PAL_MODE_OUTPUT_PUSHPULL);
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palSetPadMode(LCD_PORT, LCD_RES, PAL_MODE_OUTPUT_PUSHPULL);
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spiStart(&SPID2, &spi2cfg);
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spiSelectI(&SPID2);
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}
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/**
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* @brief After the initialisation.
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*
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* @param[in] g The GDisplay structure
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*
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* @notapi
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*/
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static inline void post_init_board(GDisplay *g) {
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(void) g;
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}
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/**
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* @brief Set or clear the lcd reset pin.
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*
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* @param[in] g The GDisplay structure
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* @param[in] state TRUE = lcd in reset, FALSE = normal operation
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*
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* @notapi
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*/
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static inline void setpin_reset(GDisplay *g, bool_t state) {
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(void) g;
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if (state == TRUE) {
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palClearPad(LCD_PORT, LCD_RES);
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} else {
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palSetPad(LCD_PORT, LCD_RES);
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}
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}
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/**
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* @brief Set the lcd back-light level.
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*
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* @param[in] g The GDisplay structure
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* @param[in] percent 0 to 100%
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*
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* @notapi
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*/
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static inline void set_backlight(GDisplay *g, uint8_t percent) {
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(void) g;
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(void) percent;
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}
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/**
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* @brief Take exclusive control of the bus
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*
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* @param[in] g The GDisplay structure
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*
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* @notapi
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*/
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static inline void acquire_bus(GDisplay *g) {
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(void) g;
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}
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/**
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* @brief Release exclusive control of the bus
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*
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* @param[in] g The GDisplay structure
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*
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* @notapi
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*/
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static inline void release_bus(GDisplay *g) {
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(void) g;
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}
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/**
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* @brief Send data to the lcd.
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*
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* @param[in] data The data to send
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*
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* @notapi
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*/
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static inline void send_data(uint16_t data) {
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// http://forum.easyelectronics.ru/viewtopic.php?p=262122#p262122
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while (!(SPI2->SR & SPI_SR_TXE)); // ïðè âõîäå íà îòïðàâêó ïðîâåðÿåì - à ïóñòîé ëè SPI_DR
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SPI2->DR = data; // çàãðóçèëè â SPI_DR êîä êîìàíäû
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}
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/**
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* @brief Send data to the index register.
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*
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* @param[in] g The GDisplay structure
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* @param[in] index The index register to set
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*
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* @notapi
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*/
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static inline void write_index(GDisplay *g, uint16_t index) {
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(void) g;
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while (SPI2->SR & SPI_SR_BSY);
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LCD_CS_RES;
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LCD_DC_CMD; // ïåðåâîäèì äèñïëåé â ðåæèì êîìàíä
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LCD_CS_SET;
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send_data(index);
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while (SPI2->SR & SPI_SR_BSY); // ïîêà ôëàã óñòàíîâëåí (==1) -- ìîäóëü SPI çàíÿò
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/* ëèøíèé öèêë îæèäàíèÿ îêîí÷àíèÿ ïåðåäà÷è êîìàíäû ïîçâîëÿåò â äàëüíåéøåì ñëàòü
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* áàéòû äàííûõ áåç íåíóæíûõ îæèäàíèé è çàäåðæåê.
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*/
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LCD_DC_DATA; // ïåðåâîäèì äèñïëåé â ðåæèì äàííûõ
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}
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/**
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* @brief Send data to the lcd with DC control.
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*
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* @param[in] g The GDisplay structure
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* @param[in] data The data to send
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*
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* @notapi
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*/
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static inline void write_data(GDisplay *g, uint16_t data) {
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(void) g;
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send_data(data);
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}
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/**
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* @brief Set the bus in read mode
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*
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* @param[in] g The GDisplay structure
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*
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* @notapi
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*/
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static inline void setreadmode(GDisplay *g) {
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(void) g;
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}
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/**
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* @brief Set the bus back into write mode
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*
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* @param[in] g The GDisplay structure
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*
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* @notapi
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*/
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static inline void setwritemode(GDisplay *g) {
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(void) g;
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}
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/**
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* @brief Read data from the lcd.
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* @return The data from the lcd
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*
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* @param[in] g The GDisplay structure
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*
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* @notapi
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*/
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static inline uint16_t read_data(GDisplay *g) {
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(void) g;
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return 0;
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}
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#endif /* _GDISP_LLD_BOARD_H */
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