esp32 spi 正常一个标准流程

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uint8_t cmd[10] = {0x55, 0x00, 0xB0, 0x99, 0x00, 0x00, 0x02, 0x00, 0x08, 0x00};     cmd[9] = getLRCx(&cmd[1], 8);     char sendbuf[10];     char recvbuf[10];       memcpy(sendbuf, cmd, 10);       // vSetSSN(0);     //   vSetMOSI(1);     //    vSetMISO(1);     // vSetSCK(1);       vSetSSN(0);     vTaskDelay(pdMS_TO_TICKS(100));        spi_transaction_t SPITransaction;     memset(&SPITransaction, 0, sizeof(spi_transaction_t));     SPITransaction.length = 10 * 8;     SPITransaction.tx_buffer = sendbuf;     SPITransaction.rx_buffer = recvbuf;     esp_err_t ret = spi_device_transmit(dev._SPIHandle, &SPITransaction);     assert(ret == ESP_OK);     if (_DEBUG_)         ESP_LOGI(TAG, "W25Q64_readStatusReg2=%x %x %x", recvbuf[0], recvbuf[1], recvbuf[2]);     vTaskDelay(pdMS_TO_TICKS(5));     //  vTaskDelay(100);     vSetSSN(1);     vTaskDelay(pdMS_TO_TICKS(10));     vSetSSN(0);     vTaskDelay(pdMS_TO_TICKS(100));       uint8_t cmd2[1] = {0x00};     char sendbuf2[1];     char recvbuf2[1];     memcpy(sendbuf2, cmd2, 1);     /*    spi_transaction_t SPITransaction2;    memset(&SPITransaction2, 0, sizeof(spi_transaction_t));    SPITransaction2.length = 1 * 8;    SPITransaction2.tx_buffer = sendbuf2;    SPITransaction2.rx_buffer = recvbuf2;    ret = spi_device_transmit(dev._SPIHandle, &SPITransaction2);    */       spi_transaction_t recv2;     memset(&recv2, 0, sizeof(recv2));     recv2.length = 1 * 8;     recv2.rxlength = 1 * 8;     recv2.rx_buffer = recvbuf2;           ret = spi_device_polling_transmit(dev._SPIHandle, &recv2);     memcpy(recvbuf2,recv2.rx_buffer,1);     assert(ret == ESP_OK);     if (_DEBUG_)         ESP_LOGI(TAG, "W25Q64_readStatusReg2=%x", recvbuf2[0]);