Hey, I gonna use uGFX with ST7735, unfortunately there is no board_ST7735_template.h for this driver and I wrote my own:
#ifndef GDISP_LLD_BOARD_H
#define GDISP_LLD_BOARD_H
#include "nrf_gpio.h"
#include "nrf_drv_spi.h"
#include "nrf_delay.h"
#include "nrf_log.h"
#include "app_error.h"
#define GDISP_LLD_PIXELFORMAT GDISP_PIXELFORMAT_RGB565
#define LCD_SCK 29
#define LCD_MISO 22
#define LCD_MOSI 28
#define LCD_CS 24
#define LCD_DC 20
#define LCD_RST 23
//#define LCD_RW 6
#define SPI_INSTANCE 1 /**< SPI instance index. */
static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE); /**< SPI instance. */
nrf_drv_spi_config_t lcd_spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
static volatile bool lcd_spi_xfer_done; /**< Flag used to indicate that SPI instance completed the transfer. */
void lcd_spi_event_handler(nrf_drv_spi_evt_t const * p_event)
{
lcd_spi_xfer_done = true;
//NRF_LOG_DEBUG("spi transfer completed.\n");
}
static GFXINLINE void init_board(GDisplay *g) {
NRF_LOG_RAW_INFO("ST7735 init_board\n");
// setup pins
nrf_gpio_cfg_output(LCD_CS);
nrf_gpio_cfg_output(LCD_DC);
nrf_gpio_cfg_output(LCD_RST);
//nrf_gpio_cfg_output(LCD_RW);
nrf_gpio_pin_write(LCD_CS, 1);
//nrf_gpio_pin_write(LCD_RW, 1);
// reset board
nrf_gpio_pin_write(LCD_RST, 0);
nrf_delay_ms(100);
nrf_gpio_pin_write(LCD_RST, 1);
// setup spi
lcd_spi_config.miso_pin = LCD_MISO;
lcd_spi_config.mosi_pin = LCD_MOSI;
lcd_spi_config.sck_pin = LCD_SCK;
lcd_spi_config.frequency = NRF_DRV_SPI_FREQ_8M;
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &lcd_spi_config, lcd_spi_event_handler));
(void) g;
}
static GFXINLINE void post_init_board(GDisplay *g) {
(void) g;
}
static GFXINLINE void setpin_reset(GDisplay *g, gBool state) {
NRF_LOG_RAW_INFO("setpin_reset: %d\r\n", state);
nrf_gpio_pin_write(LCD_RST, state);
(void) g;
(void) state;
}
static GFXINLINE void set_backlight(GDisplay *g, uint8_t percent) {
(void) g;
(void) percent;
}
static GFXINLINE void acquire_bus(GDisplay *g) {
nrf_gpio_pin_write(LCD_CS, 0);
(void) g;
}
static GFXINLINE void release_bus(GDisplay *g) {
nrf_gpio_pin_write(LCD_CS, 1);
(void) g;
}
static GFXINLINE void write_cmd(GDisplay *g, uint8_t cmd) {
// dc low
nrf_gpio_pin_write(LCD_DC, 0);
lcd_spi_xfer_done = false;
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, &cmd, 1, NULL, 0));
//while (!lcd_spi_xfer_done){};
(void) g;
(void) cmd;
}
static GFXINLINE void write_data(GDisplay *g, uint8_t data) {
(void) g;
(void) data;
nrf_gpio_pin_write(LCD_DC, 1);
lcd_spi_xfer_done = false;
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, &data, sizeof(data), NULL, 0));
//while (!lcd_spi_xfer_done){};
}
static GFXINLINE void write_data_byte(GDisplay *g, uint8_t arg) {
// dc high
nrf_gpio_pin_write(LCD_DC, 1);
lcd_spi_xfer_done = false;
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, &arg, 1, NULL, 0));
//while (!lcd_spi_xfer_done){};
(void) g;
(void) arg;
}
static GFXINLINE uint16_t read_data(GDisplay *g) {
(void) g;
return 0;
}
#endif /* GDISP_LLD_BOARD_H */
nrf51 doesn't have systick and instead of this one I use RTC timer with frequency 32kHz, but when I compile it (without errors) I see nothing on my display and in the console output. if I comment out everything with uGFX I see console output, more over I have my own lib for ST7735 and it works fine. May I use uGFX without systick, I think it needs for display's backligh?
Maybe someone had have an experience with this display and nrf51822?
