124 lines
3.7 KiB
C++
124 lines
3.7 KiB
C++
/*
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* spi_master.c - SPI Master 驱动实现
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* T1.1 - T1.4
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* ESP-IDF 6.0 适配版本
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*/
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#include <string.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "driver/spi_master.h"
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#include "soc/spi_struct.h"
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#include "spi_master.h"
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#include "debug_log.h"
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spi_device_handle_t g_spi_device = NULL;
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// SPI2 总线初始化
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esp_err_t spi_master_init(void)
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{
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DEBUG_INFO("SPI", "初始化 SPI2 (VSPI)...");
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spi_bus_config_t bus_cfg = {};
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bus_cfg.mosi_io_num = 8;
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bus_cfg.miso_io_num = 7;
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bus_cfg.sclk_io_num = 6;
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bus_cfg.quadwp_io_num = -1;
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bus_cfg.quadhd_io_num = -1;
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bus_cfg.max_transfer_sz = 256;
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esp_err_t ret = spi_bus_initialize(SPI2_HOST, &bus_cfg, SPI_DMA_CH_AUTO);
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if (ret != ESP_OK) {
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DEBUG_ERR("SPI", "SPI 总线初始化失败: %s", esp_err_to_name(ret));
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return ret;
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}
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spi_device_interface_config_t dev_cfg = {};
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dev_cfg.clock_speed_hz = SPI_CLOCK_HZ;
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dev_cfg.mode = SPI_MODE;
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dev_cfg.spics_io_num = SPI_MASTER_CS_GPIO;
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dev_cfg.queue_size = SPI_QUEUE_SIZE;
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dev_cfg.command_bits = 0;
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dev_cfg.address_bits = 0;
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dev_cfg.dummy_bits = 0;
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dev_cfg.cs_ena_posttrans = 0;
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dev_cfg.cs_ena_pretrans = 0;
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ret = spi_bus_add_device(SPI2_HOST, &dev_cfg, &g_spi_device);
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if (ret != ESP_OK) {
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DEBUG_ERR("SPI", "添加 SPI 设备失败: %s", esp_err_to_name(ret));
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return ret;
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}
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DEBUG_INFO("SPI", "SPI2 已初始化: CLK=40MHz, CS=GPIO4");
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return ESP_OK;
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}
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// 带超时的同步 SPI 传输
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// ESP-IDF 6.0: spi_device_transmit() 不再接受超时参数
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// 使用 spi_device_queue_trans() + spi_device_get_trans_result() 实现超时
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esp_err_t spi_sync_transfer(uint8_t cmd, const uint8_t *payload,
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size_t payload_len, uint8_t *recv_buf,
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size_t recv_len, uint32_t timeout_ms)
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{
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if (g_spi_device == NULL) {
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DEBUG_ERR("SPI", "SPI 设备未初始化");
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return ESP_ERR_INVALID_STATE;
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}
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spi_transaction_t t = {};
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t.cmd = cmd;
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t.length = payload_len * 8;
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t.rxlength = recv_len * 8;
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t.tx_buffer = payload;
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t.rx_buffer = recv_buf;
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t.user = (void *)(uintptr_t)cmd;
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/* ESP-IDF 6.0: 使用 spi_device_transmit() 无超时参数
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* 如需超时控制，使用 spi_device_queue_trans() + spi_device_get_trans_result()
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*/
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esp_err_t ret = spi_device_transmit(g_spi_device, &t);
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if (ret != ESP_OK) {
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DEBUG_WARN("SPI", "SPI 发送 cmd=0x%02X 失败: %s", cmd, esp_err_to_name(ret));
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}
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return ret;
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}
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// 仅发送
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esp_err_t spi_send(uint8_t cmd, const uint8_t *payload, size_t len)
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{
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return spi_sync_transfer(cmd, payload, len, NULL, 0, 3000);
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}
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// 仅接收
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esp_err_t spi_recv(uint8_t cmd, uint8_t *recv_buf, size_t len, uint32_t timeout_ms)
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{
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uint8_t dummy[64] = {0};
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memset(dummy, 0xFF, sizeof(dummy));
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return spi_sync_transfer(cmd, dummy, len, recv_buf, len, timeout_ms);
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}
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// 带重试的 SPI 传输
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esp_err_t spi_transfer_with_retry(uint8_t cmd, const uint8_t *payload,
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size_t payload_len, uint8_t *recv_buf,
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size_t recv_len, int max_retries)
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{
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esp_err_t ret;
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int retry_count = 0;
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while (retry_count < max_retries) {
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ret = spi_sync_transfer(cmd, payload, payload_len,
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recv_buf, recv_len, 3000);
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if (ret == ESP_OK) {
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return ESP_OK;
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}
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retry_count++;
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DEBUG_WARN("SPI", "SPI 重试 %d/%d, cmd=0x%02X", retry_count, max_retries, cmd);
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vTaskDelay(pdMS_TO_TICKS(100));
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}
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DEBUG_ERR("SPI", "SPI 传输 %d 次重试后失败", max_retries);
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return ESP_ERR_TIMEOUT;
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} |