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ST7789: Hardware abstraction layer prototype

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This commit is contained in:
C47D 2021-05-17 09:29:32 -05:00
parent 31f340d864
commit 0b09769dcc
1 changed files with 63 additions and 21 deletions
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84
lvgl_tft/st7789.c
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@ -37,6 +37,13 @@ static void st7789_set_orientation(uint8_t orientation);
static void st7789_send_color(void *data, size_t length);
static void st7789_reset(void);
/* The user should init all the hardware related to the display in this
* function, maybe it's better to do this outside the display code, e.g.
* in main before calling anything related to LVGL.
* Some platforms, like STM32CubeIDE init and configure all the hardware
* with auto generated code. */
static void bsp_init_hardware(void);
/**********************
* STATIC VARIABLES
**********************/
@ -50,6 +57,8 @@ static void st7789_send_color(void *data, size_t length);
**********************/
void st7789_init(void)
{
bsp_init_hardware();
lcd_init_cmd_t st7789_init_cmds[] = {
{0xCF, {0x00, 0x83, 0X30}, 3},
{0xED, {0x64, 0x03, 0X12, 0X81}, 4},
@ -85,24 +94,7 @@ void st7789_init(void)
{0, {0}, 0xff},
};
//Initialize non-SPI GPIOs
gpio_pad_select_gpio(ST7789_DC);
gpio_set_direction(ST7789_DC, GPIO_MODE_OUTPUT);
#if !defined(ST7789_SOFT_RST)
gpio_pad_select_gpio(ST7789_RST);
gpio_set_direction(ST7789_RST, GPIO_MODE_OUTPUT);
#endif
//Reset the display
#if !defined(ST7789_SOFT_RST)
gpio_set_level(ST7789_RST, 0);
vTaskDelay(100 / portTICK_RATE_MS);
gpio_set_level(ST7789_RST, 1);
vTaskDelay(100 / portTICK_RATE_MS);
#else
st7789_send_cmd(ST7789_SWRESET);
#endif
st7789_reset();
printf("ST7789 initialization.\n");
@ -179,24 +171,37 @@ void st7789_flush(lv_disp_drv_t * drv, const lv_area_t * area, lv_color_t * colo
void st7789_send_cmd(uint8_t cmd)
{
disp_wait_for_pending_transactions();
gpio_set_level(ST7789_DC, 0);
bsp_gpio_dc(0);
disp_spi_send_data(&cmd, 1);
}
void st7789_send_data(void * data, uint16_t length)
{
disp_wait_for_pending_transactions();
gpio_set_level(ST7789_DC, 1);
bsp_gpio_dc(1);
disp_spi_send_data(data, length);
}
static void st7789_send_color(void * data, size_t length)
{
disp_wait_for_pending_transactions();
gpio_set_level(ST7789_DC, 1);
bsp_gpio_dc(1);
disp_spi_send_colors(data, length);
}
/* Reset the display, if we don't have a reset pin we use software reset */
static void st7789_reset(void)
{
#if !defined(CONFIG_LV_DISP_ST7789_SOFT_RESET)
bsp_gpio_rst(0);
bsp_delay(100);
bsp_gpio_rst(1);
bsp_delay(100);
#else
st7789_send_cmd(ST7789_SWRESET);
#endif
}
static void st7789_set_orientation(uint8_t orientation)
{
// ESP_ASSERT(orientation < 4);
@ -221,3 +226,40 @@ static void st7789_set_orientation(uint8_t orientation)
st7789_send_cmd(ST7789_MADCTL);
st7789_send_data((void *) &data[orientation], 1);
}
static void bsp_delay(uint32_t delay_ms)
{
vTaskDelay(delay_ms / portTICK_RATE_MS);
}
static void bsp_backlight(uint8_t state)
{
gpio_set_level(ST7789_BCKL, state);
}
static void bsp_gpio_dc(uint8_t state)
{
gpio_set_level(ST7789_DC, state);
}
static void bsp_gpio_rst(uint8_t state)
{
gpio_set_level(ST7789_RST, state);
}
static void bsp_init_hardware(void)
{
//Initialize non-SPI GPIOs
gpio_pad_select_gpio(ST7789_DC);
gpio_set_direction(ST7789_DC, GPIO_MODE_OUTPUT);
#if !defined(CONFIG_LV_DISP_ST7789_SOFT_RESET)
gpio_pad_select_gpio(ST7789_RST);
gpio_set_direction(ST7789_RST, GPIO_MODE_OUTPUT);
#endif
#if ST7789_ENABLE_BACKLIGHT_CONTROL
gpio_pad_select_gpio(ST7789_BCKL);
gpio_set_direction(ST7789_BCKL, GPIO_MODE_OUTPUT);
#endif
}