From cf22a7f8e377bd6ae94c982aff0c7410013e6ed2 Mon Sep 17 00:00:00 2001 From: inmarket Date: Fri, 28 Mar 2014 08:51:36 +1000 Subject: [PATCH] Example spi board config for ILI9341 --- boards/addons/gdisp/board_ILI9341_spi.h | 222 ++++++++++++++++++++++++ 1 file changed, 222 insertions(+) create mode 100644 boards/addons/gdisp/board_ILI9341_spi.h 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 */ +