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spi_lcd: support CS active high

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Closes https://github.com/espressif/esp-idf/issues/9881
This commit is contained in:
morris 2022-10-10 14:42:47 +08:00
parent 40b48a5393
commit 3a5bc50c2f
2 changed files with 4 additions and 1 deletions
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1
components/esp_lcd/include/esp_lcd_panel_io.h
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@ -117,6 +117,7 @@ typedef struct {
unsigned int dc_low_on_data: 1; /*!< If this flag is enabled, DC line = 0 means transfer data, DC line = 1 means transfer command; vice versa */
unsigned int octal_mode: 1; /*!< transmit with octal mode (8 data lines), this mode is used to simulate Intel 8080 timing */
unsigned int lsb_first: 1; /*!< transmit LSB bit first */
unsigned int cs_high_active: 1; /*!< CS line is high active */
} flags; /*!< Extra flags to fine-tune the SPI device */
} esp_lcd_panel_io_spi_config_t;

4
components/esp_lcd/src/esp_lcd_panel_io_spi.c
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@ -73,7 +73,9 @@ esp_err_t esp_lcd_new_panel_io_spi(esp_lcd_spi_bus_handle_t bus, const esp_lcd_p
ESP_GOTO_ON_FALSE(spi_panel_io, ESP_ERR_NO_MEM, err, TAG, "no mem for spi panel io");
spi_device_interface_config_t devcfg = {
.flags = SPI_DEVICE_HALFDUPLEX | (io_config->flags.lsb_first ? SPI_DEVICE_TXBIT_LSBFIRST : 0),
.flags = SPI_DEVICE_HALFDUPLEX |
(io_config->flags.lsb_first ? SPI_DEVICE_TXBIT_LSBFIRST : 0) |
(io_config->flags.cs_high_active ? SPI_DEVICE_POSITIVE_CS : 0),
.clock_speed_hz = io_config->pclk_hz,
.mode = io_config->spi_mode,
.spics_io_num = io_config->cs_gpio_num,