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spi_lcd: allow dc gpio set to -1

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Closes https://github.com/espressif/esp-idf/issues/9881
This commit is contained in:
morris
2022-10-10 14:57:17 +08:00
parent 39d2a2e0bd
commit e518e3efd3
2 changed files with 1 additions and 4 deletions
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2
components/esp_lcd/include/esp_lcd_panel_io.h
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@ -105,7 +105,7 @@ typedef bool (*esp_lcd_panel_io_color_trans_done_cb_t)(esp_lcd_panel_io_handle_t
*/
typedef struct {
int cs_gpio_num; /*!< GPIO used for CS line */
int dc_gpio_num; /*!< GPIO used to select the D/C line, set this to -1 if the D/C line not controlled by manually pulling high/low GPIO */
int dc_gpio_num; /*!< GPIO used to select the D/C line, set this to -1 if the D/C line is not used */
int spi_mode; /*!< Traditional SPI mode (0~3) */
unsigned int pclk_hz; /*!< Frequency of pixel clock */
size_t trans_queue_depth; /*!< Size of internal transaction queue */

3
components/esp_lcd/src/esp_lcd_panel_io_spi.c
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@ -66,9 +66,6 @@ esp_err_t esp_lcd_new_panel_io_spi(esp_lcd_spi_bus_handle_t bus, const esp_lcd_p
esp_err_t ret = ESP_OK;
esp_lcd_panel_io_spi_t *spi_panel_io = NULL;
ESP_GOTO_ON_FALSE(bus && io_config && ret_io, ESP_ERR_INVALID_ARG, err, TAG, "invalid argument");
// at the moment, the hardware doesn't support 9-bit SPI LCD, but in the future, there will be such a feature
// so for now, we will force the user to use the GPIO to control the LCD's D/C line.
ESP_GOTO_ON_FALSE(io_config->dc_gpio_num >= 0, ESP_ERR_INVALID_ARG, err, TAG, "invalid DC mode");
spi_panel_io = calloc(1, sizeof(esp_lcd_panel_io_spi_t) + sizeof(lcd_spi_trans_descriptor_t) * io_config->trans_queue_depth);
ESP_GOTO_ON_FALSE(spi_panel_io, ESP_ERR_NO_MEM, err, TAG, "no mem for spi panel io");