63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
#include "spi.h"
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#include "driver/spi_master.h"
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#include "esp_log.h"
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#define VSPI_MISO -1 //接收引脚不使用，仅发送
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#define VSPI_MOSI 3
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#define VSPI_SCLK 2
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#define LCD_CS 7
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#define LCD_DS 6
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static const char *TAG = "SPI_2";
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spi_device_handle_t lcd_spi;
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void spi_init()
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{
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ESP_LOGI(TAG,"初始化SPI IO总线");
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esp_err_t ret;
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// 1. SPI 总线配置
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spi_bus_config_t buscfg = {
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.miso_io_num = VSPI_MISO, // MISO 引脚
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.mosi_io_num = VSPI_MOSI, // MOSI 引脚
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.sclk_io_num = VSPI_SCLK, // 时钟引脚
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.quadwp_io_num = -1, // 不使用 QWP
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.quadhd_io_num = -1, // 不使用 QHD
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.max_transfer_sz = 4096, // 最大传输大小
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};
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// 2. 初始化 SPI 总线
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ret = spi_bus_initialize(SPI2_HOST, &buscfg, SPI_DMA_CH_AUTO);
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if (ret != ESP_OK) {
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ESP_LOGE(TAG, "SPI2 IO总线初始化失败");
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return;
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}
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ESP_LOGI(TAG,"SPI IO总线初始化成功");
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ESP_LOGI(TAG,"挂载设备片选IO");
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spi_device_interface_config_t devcfg = {
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.mode = 0, // SPI 模式 0
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.clock_speed_hz = 80 * 1000 * 1000, //
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.spics_io_num = LCD_CS,
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.queue_size = 7, // 队列深度
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.command_bits = 8, // 命令 8 位
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.address_bits = 8,
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};
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ret = spi_bus_add_device(SPI2_HOST, &devcfg, &lcd_spi);
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if (ret != ESP_OK) {
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ESP_LOGE(TAG, "挂载设备片选IO失败");
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return;
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}
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}
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