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rgb_lcd: make pclk gpio setting optional

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PCLK may not be necessary in VGA use case.
Closes https://github.com/espressif/esp-idf/issues/11298
This commit is contained in:
morris 2023-05-08 14:47:54 +08:00
parent 9652d8ed6f
commit 5ba53c9294
2 changed files with 9 additions and 6 deletions
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2
components/esp_lcd/include/esp_lcd_panel_rgb.h
View File

@ -126,7 +126,7 @@ typedef struct {
int hsync_gpio_num; /*!< GPIO used for HSYNC signal */
int vsync_gpio_num; /*!< GPIO used for VSYNC signal */
int de_gpio_num; /*!< GPIO used for DE signal, set to -1 if it's not used */
int pclk_gpio_num; /*!< GPIO used for PCLK signal */
int pclk_gpio_num; /*!< GPIO used for PCLK signal, set to -1 if it's not used */
int disp_gpio_num; /*!< GPIO used for display control signal, set to -1 if it's not used */
int data_gpio_nums[SOC_LCD_RGB_DATA_WIDTH]; /*!< GPIOs used for data lines */
struct {

13
components/esp_lcd/src/esp_lcd_panel_rgb.c
View File

@ -866,7 +866,7 @@ static esp_err_t lcd_rgb_panel_configure_gpio(esp_rgb_panel_t *panel, const esp_
{
int panel_id = panel->panel_id;
// check validation of GPIO number
bool valid_gpio = (panel_config->pclk_gpio_num >= 0);
bool valid_gpio = true;
if (panel_config->de_gpio_num < 0) {
// Hsync and Vsync are required in HV mode
valid_gpio = valid_gpio && (panel_config->hsync_gpio_num >= 0) && (panel_config->vsync_gpio_num >= 0);
@ -896,10 +896,13 @@ static esp_err_t lcd_rgb_panel_configure_gpio(esp_rgb_panel_t *panel, const esp_
esp_rom_gpio_connect_out_signal(panel_config->vsync_gpio_num,
lcd_periph_signals.panels[panel_id].vsync_sig, false, false);
}
gpio_hal_iomux_func_sel(GPIO_PIN_MUX_REG[panel_config->pclk_gpio_num], PIN_FUNC_GPIO);
gpio_set_direction(panel_config->pclk_gpio_num, GPIO_MODE_OUTPUT);
esp_rom_gpio_connect_out_signal(panel_config->pclk_gpio_num,
lcd_periph_signals.panels[panel_id].pclk_sig, false, false);
// PCLK may not be necessary in some cases (i.e. VGA output)
if (panel_config->pclk_gpio_num >= 0) {
gpio_hal_iomux_func_sel(GPIO_PIN_MUX_REG[panel_config->pclk_gpio_num], PIN_FUNC_GPIO);
gpio_set_direction(panel_config->pclk_gpio_num, GPIO_MODE_OUTPUT);
esp_rom_gpio_connect_out_signal(panel_config->pclk_gpio_num,
lcd_periph_signals.panels[panel_id].pclk_sig, false, false);
}
// DE signal might not be necessary for some RGB LCD
if (panel_config->de_gpio_num >= 0) {
gpio_hal_iomux_func_sel(GPIO_PIN_MUX_REG[panel_config->de_gpio_num], PIN_FUNC_GPIO);