diff options
Diffstat (limited to 'drivers/gdisp/HX8347D/gdisp_lld_board_st_stm32f4_discovery.h')
| -rw-r--r-- | drivers/gdisp/HX8347D/gdisp_lld_board_st_stm32f4_discovery.h | 155 |
1 files changed, 75 insertions, 80 deletions
diff --git a/drivers/gdisp/HX8347D/gdisp_lld_board_st_stm32f4_discovery.h b/drivers/gdisp/HX8347D/gdisp_lld_board_st_stm32f4_discovery.h index 984b92dd..8365fe74 100644 --- a/drivers/gdisp/HX8347D/gdisp_lld_board_st_stm32f4_discovery.h +++ b/drivers/gdisp/HX8347D/gdisp_lld_board_st_stm32f4_discovery.h @@ -16,21 +16,31 @@ #ifndef _GDISP_LLD_BOARD_H
#define _GDISP_LLD_BOARD_H
-#define SET_RST palSetPad(GPIOB, 8);
-#define CLR_RST palClearPad(GPIOB, 8);
+// Overrides
+#ifndef GDISP_INITIAL_BACKLIGHT
+ #define GDISP_INITIAL_BACKLIGHT 50
+#endif
+
+/* Pin assignments */
+#define SET_RST palSetPad(GPIOB, 8)
+#define CLR_RST palClearPad(GPIOB, 8)
+#define SET_DATA palSetPad(GPIOB, 9)
+#define CLR_DATA palClearPad(GPIOB, 9)
+#define SET_CS palSetPad(GPIOA, 4)
+#define CLR_CS palClearPad(GPIOA, 4)
/* PWM configuration structure. We use timer 4 channel 2 (orange LED on board). */
static const PWMConfig pwmcfg = {
- 1000000, /* 1 MHz PWM clock frequency. */
- 100, /* PWM period is 100 cycles. */
- NULL,
- {
- {PWM_OUTPUT_ACTIVE_HIGH, NULL},
- {PWM_OUTPUT_ACTIVE_HIGH, NULL},
- {PWM_OUTPUT_ACTIVE_HIGH, NULL},
- {PWM_OUTPUT_ACTIVE_HIGH, NULL}
- },
- 0
+ 1000000, /* 1 MHz PWM clock frequency. */
+ 100, /* PWM period is 100 cycles. */
+ NULL,
+ {
+ {PWM_OUTPUT_ACTIVE_HIGH, NULL},
+ {PWM_OUTPUT_ACTIVE_HIGH, NULL},
+ {PWM_OUTPUT_ACTIVE_HIGH, NULL},
+ {PWM_OUTPUT_ACTIVE_HIGH, NULL}
+ },
+ 0
};
/*
@@ -38,12 +48,12 @@ static const PWMConfig pwmcfg = { * Speed 42MHz, CPHA=0, CPOL=0, 8bits frames, MSb transmitted first.
* The slave select line is the pin 4 on the port GPIOA.
*/
-static const SPIConfig spi1cfg1 = {
- NULL,
- /* HW dependent part.*/
- GPIOA,
- 4,
- 0 //SPI_CR1_BR_0
+static const SPIConfig spi1cfg_8bit = {
+ NULL,
+ /* HW dependent part.*/
+ GPIOA,
+ 4,
+ 0 //SPI_CR1_BR_0
};
/*
@@ -51,48 +61,42 @@ static const SPIConfig spi1cfg1 = { * Speed 42MHz, CPHA=0, CPOL=0, 16bits frames, MSb transmitted first.
* The slave select line is the pin 4 on the port GPIOA.
*/
-static const SPIConfig spi1cfg2 = {
- NULL,
- /* HW dependent part.*/
- GPIOA,
- 4,
- SPI_CR1_DFF //SPI_CR1_BR_0
+static const SPIConfig spi1cfg_16bit = {
+ NULL,
+ /* HW dependent part.*/
+ GPIOA,
+ 4,
+ SPI_CR1_DFF //SPI_CR1_BR_0
};
/**
* @brief Initialise the board for the display.
- * @notes This board definition uses GPIO and assumes exclusive access to these GPIO pins
+ * @notes This board definition uses GPIO and SPI. It assumes exclusive access to these GPIO pins but not necessarily the SPI port.
*
* @notapi
*/
static inline void init_board(void) {
-
/* Display backlight control */
/* TIM4 is an alternate function 2 (AF2) */
pwmStart(&PWMD4, &pwmcfg);
palSetPadMode(GPIOD, 13, PAL_MODE_ALTERNATE(2));
pwmEnableChannel(&PWMD4, 1, 100);
- palSetPadMode(GPIOB, 8, PAL_MODE_OUTPUT_PUSHPULL |
- PAL_STM32_OSPEED_HIGHEST); /* RST */
- palSetPadMode(GPIOB, 9, PAL_MODE_OUTPUT_PUSHPULL |
- PAL_STM32_OSPEED_HIGHEST); /* RS */
+ palSetPadMode(GPIOB, 8, PAL_MODE_OUTPUT_PUSHPULL|PAL_STM32_OSPEED_HIGHEST); /* RST */
+ palSetPadMode(GPIOB, 9, PAL_MODE_OUTPUT_PUSHPULL|PAL_STM32_OSPEED_HIGHEST); /* RS */
/*
- * Initializes the SPI driver 1. The SPI1 signals are routed as follow:
- * PB12 - NSS.
- * PB13 - SCK.
- * PB14 - MISO.
- * PB15 - MOSI.
- */
- spiStart(&SPID1, &spi1cfg1);
- palSetPad(GPIOA, 4);
- palSetPadMode(GPIOA, 4, PAL_MODE_OUTPUT_PUSHPULL |
- PAL_STM32_OSPEED_HIGHEST); /* NSS. */
- palSetPadMode(GPIOA, 5, PAL_MODE_ALTERNATE(5) |
- PAL_STM32_OSPEED_HIGHEST); /* SCK. */
- palSetPadMode(GPIOA, 6, PAL_MODE_ALTERNATE(5)); /* MISO. */
- palSetPadMode(GPIOA, 7, PAL_MODE_ALTERNATE(5) |
- PAL_STM32_OSPEED_HIGHEST); /* MOSI. */
+ * Initializes the SPI driver 1. The SPI1 signals are routed as follow:
+ * PB12 - NSS.
+ * PB13 - SCK.
+ * PB14 - MISO.
+ * PB15 - MOSI.
+ */
+ SET_CS; SET_DATA;
+ spiStart(&SPID1, &spi1cfg_8bit);
+ palSetPadMode(GPIOA, 4, PAL_MODE_OUTPUT_PUSHPULL|PAL_STM32_OSPEED_HIGHEST); /* NSS. */
+ palSetPadMode(GPIOA, 5, PAL_MODE_ALTERNATE(5)|PAL_STM32_OSPEED_HIGHEST); /* SCK. */
+ palSetPadMode(GPIOA, 6, PAL_MODE_ALTERNATE(5)); /* MISO. */
+ palSetPadMode(GPIOA, 7, PAL_MODE_ALTERNATE(5)|PAL_STM32_OSPEED_HIGHEST); /* MOSI. */
}
@@ -124,79 +128,70 @@ static inline void set_backlight(uint8_t percent) { /**
* @brief Take exclusive control of the bus
- * @note Not needed, not implemented
- *
* @notapi
*/
static inline void acquire_bus(void) {
spiAcquireBus(&SPID1);
+ while(((SPI1->SR & SPI_SR_TXE) == 0) || ((SPI1->SR & SPI_SR_BSY) != 0)); // Safety
+ CLR_CS;
}
/**
* @brief Release exclusive control of the bus
- * @note Not needed, not implemented
- *
* @notapi
*/
static inline void release_bus(void) {
+ SET_CS;
spiReleaseBus(&SPID1);
}
/**
- * @brief Send data to the index register.
+ * @brief Set the bus in 16 bit mode
+ * @notapi
+ */
+static inline void busmode16(void) {
+ spiStart(&SPID1, &spi1cfg_16bit);
+}
+
+/**
+ * @brief Set the bus in 8 bit mode (the default)
+ * @notapi
+ */
+static inline void busmode8(void) {
+ spiStart(&SPID1, &spi1cfg_8bit);
+}
+
+/**
+ * @brief Set which index register to use.
*
* @param[in] index The index register to set
*
* @notapi
*/
static inline void write_index(uint8_t cmd) {
- palClearPad(GPIOB, 9);
- palClearPad(GPIOA, 4);
- while((SPI1->SR & SPI_SR_TXE) == 0);
+ CLR_DATA;
SPI1->DR = cmd;
while(((SPI1->SR & SPI_SR_TXE) == 0) || ((SPI1->SR & SPI_SR_BSY) != 0));
- palSetPad(GPIOB, 9);
+ SET_DATA;
}
/**
- * @brief Send data to the lcd.
+ * @brief Send a command to the lcd.
*
* @param[in] data The data to send
*
* @notapi
*/
-static inline void write_data(uint8_t data) {
+static inline void write_reg(uint8_t cmd, uint8_t data) {
+ write_index(cmd);
SPI1->DR = data;
while(((SPI1->SR & SPI_SR_TXE) == 0) || ((SPI1->SR & SPI_SR_BSY) != 0));
- palSetPad(GPIOA, 4);
-}
-
-static inline void write_ram8(uint8_t data1, uint8_t data2) {
- SPI1->DR = data1;
- while((SPI1->SR & SPI_SR_TXE) == 0);
- SPI1->DR = data2;
- while(((SPI1->SR & SPI_SR_TXE) == 0) || ((SPI1->SR & SPI_SR_BSY) != 0));
- palSetPad(GPIOA, 4);
}
static inline void write_ram16(uint16_t data) {
- while((SPI1->SR & SPI_SR_TXE) == 0);
SPI1->DR = data;
+ while((SPI1->SR & SPI_SR_TXE) == 0);
}
-#if GDISP_HARDWARE_READPIXEL || defined(__DOXYGEN__)
-/**
- * @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) {
-}
-#endif
-
#endif /* _GDISP_LLD_BOARD_H */
/** @} */
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