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lcd: spi lcd support transmit lsb first

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Closes https://github.com/espressif/esp-idf/issues/8790
This commit is contained in:
morris
2022-04-18 18:30:47 +08:00
parent 2f1393ad53
commit 5e49369a2c
2 changed files with 4 additions and 2 deletions
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3
components/esp_lcd/include/esp_lcd_panel_io.h
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@@ -98,7 +98,8 @@ typedef struct {
unsigned int dc_as_cmd_phase: 1; /*!< D/C line value is encoded into SPI transaction command phase */ unsigned int dc_as_cmd_phase: 1; /*!< D/C line value is encoded into SPI transaction command phase */
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 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 octal_mode: 1; /*!< transmit with octal mode (8 data lines), this mode is used to simulate Intel 8080 timing */
} flags; unsigned int lsb_first: 1; /*!< transmit LSB bit first */
} flags; /*!< Extra flags to fine-tune the SPI device */
} esp_lcd_panel_io_spi_config_t; } esp_lcd_panel_io_spi_config_t;
/** /**

3
components/esp_lcd/src/esp_lcd_panel_io_spi.c
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@@ -65,7 +65,8 @@ 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"); 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 = { spi_device_interface_config_t devcfg = {
.flags = SPI_DEVICE_HALFDUPLEX, // only use TX path, so half duplex is enough // currently the driver only supports TX path, so half duplex is enough
.flags = SPI_DEVICE_HALFDUPLEX | (io_config->flags.lsb_first ? SPI_DEVICE_TXBIT_LSBFIRST : 0),
.clock_speed_hz = io_config->pclk_hz, .clock_speed_hz = io_config->pclk_hz,
.mode = io_config->spi_mode, .mode = io_config->spi_mode,
.spics_io_num = io_config->cs_gpio_num, .spics_io_num = io_config->cs_gpio_num,