From 6107cd79180603660374c626da15e70ac4f26a5e Mon Sep 17 00:00:00 2001 From: Joel Bodenmann Date: Sat, 22 Jun 2013 03:09:45 +0200 Subject: Added RA8875 GDISP driver --- drivers/gdisp/RA8875/gdisp_lld_board.h | 199 +++++++++++++++++++++++++++++++++ 1 file changed, 199 insertions(+) create mode 100644 drivers/gdisp/RA8875/gdisp_lld_board.h (limited to 'drivers/gdisp/RA8875/gdisp_lld_board.h') diff --git a/drivers/gdisp/RA8875/gdisp_lld_board.h b/drivers/gdisp/RA8875/gdisp_lld_board.h new file mode 100644 index 00000000..c8370020 --- /dev/null +++ b/drivers/gdisp/RA8875/gdisp_lld_board.h @@ -0,0 +1,199 @@ +/* + * 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://chibios-gfx.com/license.html + */ + +/** + * @file drivers/gdisp/SSD1289/gdisp_lld_board_example_fsmc.h + * @brief GDISP Graphic Driver subsystem board interface for the SSD1289 display. + * + * @addtogroup GDISP + * @{ + */ + +#ifndef _GDISP_LLD_BOARD_H +#define _GDISP_LLD_BOARD_H + +#if defined(GDISP_USE_GPIO) + #define Set_CS palSetPad(GDISP_CMD_PORT, GDISP_CS); + #define Clr_CS palClearPad(GDISP_CMD_PORT, GDISP_CS); + #define Set_RS palSetPad(GDISP_CMD_PORT, GDISP_RS); + #define Clr_RS palClearPad(GDISP_CMD_PORT, GDISP_RS); + #define Set_WR palSetPad(GDISP_CMD_PORT, GDISP_WR); + #define Clr_WR palClearPad(GDISP_CMD_PORT, GDISP_WR); + #define Set_RD palSetPad(GDISP_CMD_PORT, GDISP_RD); + #define Clr_RD palClearPad(GDISP_CMD_PORT, GDISP_RD); +#endif + +#if defined(GDISP_USE_FSMC) + /* Using FSMC A16 as RS */ + #define GDISP_RAM (*((volatile uint16_t *) 0x68000000)) /* RS = 0 */ + #define GDISP_REG (*((volatile uint16_t *) 0x68020000)) /* RS = 1 */ +#endif + +/** + * @brief Send data to the index register. + * + * @param[in] index The index register to set + * + * @notapi + */ +static inline void write_index(uint16_t index) { GDISP_REG = index; } + +/** + * @brief Send data to the lcd. + * + * @param[in] data The data to send + * + * @notapi + */ +static inline void write_data(uint16_t data) { GDISP_RAM = data; } + +/** + * @brief Read data from the lcd. + * + * @return The data from the lcd + * @note The chip select may need to be asserted/de-asserted + * around the actual spi read + * + * @notapi + */ +static inline uint16_t read_data(void) { return GDISP_RAM; } + +/** + * @brief Initialise the board for the display. + * @notes Performs the following functions: + * 1. initialise the io port used by your display + * 2. initialise the reset pin (initial state not-in-reset) + * 3. initialise the chip select pin (initial state not-active) + * 4. initialise the backlight pin (initial state back-light off) + * + * @notapi + */ +static inline void init_board(void) { + const unsigned char FSMC_Bank = 4; + + #if defined(STM32F1XX) || defined(STM32F3XX) + /* FSMC setup for F1/F3 */ + rccEnableAHB(RCC_AHBENR_FSMCEN, 0); + + #if defined(GDISP_USE_DMA) && defined(GDISP_DMA_STREAM) + #error "DMA not implemented for F1/F3 Devices" + #endif + #elif defined(STM32F4XX) || defined(STM32F2XX) + /* STM32F2-F4 FSMC init */ + rccEnableAHB3(RCC_AHB3ENR_FSMCEN, 0); + + #if defined(GDISP_USE_DMA) && defined(GDISP_DMA_STREAM) + if (dmaStreamAllocate(GDISP_DMA_STREAM, 0, NULL, NULL)) chSysHalt(); + dmaStreamSetMemory0(GDISP_DMA_STREAM, &GDISP_RAM); + dmaStreamSetMode(GDISP_DMA_STREAM, STM32_DMA_CR_PL(0) | STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD | STM32_DMA_CR_DIR_M2M); + #endif + #else + #error "FSMC not implemented for this device" + #endif + + /* set pins to FSMC mode */ + IOBus busD = {GPIOD, (1 << 0) | (1 << 1) | (1 << 4) | (1 << 5) | (1 << 8) | + (1 << 9) | (1 << 10) | (1 << 11) | (1 << 14) | (1 << 15), 0}; + + IOBus busE = {GPIOE, (1 << 7) | (1 << 8) | (1 << 9) | (1 << 10) | (1 << 11) | (1 << 12) | + (1 << 13) | (1 << 14) | (1 << 15), 0}; + + IOBus busG = {GPIOG, (1 << 10), 0}; + + palSetBusMode(&busD, PAL_MODE_ALTERNATE(12)); + palSetBusMode(&busE, PAL_MODE_ALTERNATE(12)); + palSetBusMode(&busG, PAL_MODE_ALTERNATE(12)); + + /* FSMC timing */ + FSMC_Bank1->BTCR[FSMC_Bank+1] = (FSMC_BTR1_ADDSET_1 | FSMC_BTR1_ADDSET_3) \ + | (FSMC_BTR1_DATAST_1 | FSMC_BTR1_DATAST_3) \ + | (FSMC_BTR1_BUSTURN_1 | FSMC_BTR1_BUSTURN_3) ; + + /* Bank1 NOR/SRAM control register configuration + * This is actually not needed as already set by default after reset */ + FSMC_Bank1->BTCR[FSMC_Bank] = FSMC_BCR1_MWID_0 | FSMC_BCR1_WREN | FSMC_BCR1_MBKEN; +} + +static inline void post_init_board(void) { + const unsigned char FSMC_Bank = 2; + /* FSMC delay reduced as the controller now runs at full speed */ + FSMC_Bank1->BTCR[FSMC_Bank+1] = FSMC_BTR1_ADDSET_0 | FSMC_BTR1_DATAST_2 | FSMC_BTR1_BUSTURN_0 ; + FSMC_Bank1->BTCR[FSMC_Bank] = FSMC_BCR1_MWID_0 | FSMC_BCR1_WREN | FSMC_BCR1_MBKEN; +} + +/** + * @brief Set or clear the lcd reset pin. + * + * @param[in] state TRUE = lcd in reset, FALSE = normal operation + * + * @notapi + */ +static inline void setpin_reset(bool_t state) { + (void) state; + /* Nothing to do here */ +} + +/** + * @brief Set the lcd back-light level. + * + * @param[in] percent 0 to 100% + * + * @notapi + */ +static inline void set_backlight(uint8_t percent) { + + //duty_cycle is 00..FF + //Work in progress: the RA8875 has a built-in PWM, its output can + //be used by a Dynamic Background Control or by a host (user) + + uint8_t temp, temp1; + // Enable PWM1 + write_index(0x8a);//MCLR + temp = read_data(); + temp |= 1<<7 ; + write_data(temp); + + // PWM1 function select + write_index(0x8a);//MCLR + temp = read_data(); + temp &= ~(1<<4); + write_data(temp); + + // PWM1 Clock ratio + temp1= 0x0b&0x0f; + write_index(0x8a);//MCLR + temp = read_data(); + temp &= 0xf0; + temp |= temp1 ; + write_data(temp); + + // Write duty cycle + write_index(0x8b);//PTNO + write_data(percent); + // PWM1 duty cycle +} + +/** + * @brief Take exclusive control of the bus + * + * @notapi + */ +static inline void acquire_bus(void) { + /* Nothing to do here */ +} + +/** + * @brief Release exclusive control of the bus + * + * @notapi + */ +static inline void release_bus(void) { + /* Nothing to do here */ +} + +#endif /* _GDISP_LLD_BOARD_H */ +/** @} */ -- cgit v1.2.3