RT，看了下头文件stm32f1xx_hal_spi.h，非DMA收发才有超时参数，也就是DMA都是非阻塞式。

1. int SPI3_Flash_DMA_RD(unsigned long Off, unsigned short NumBytes, void *pVoid, void *pBuffer)
   
2. {
   
3.     (void)pVoid;
   
4.     assert_param(pBuffer != 0);
   
5.     SPI3_CS_LOW();
   
6.     unsigned char init_str[] = {READ, (Off & 0xFF0000) >> 16, (Off & 0xFF00) >> 8, (Off & 0xFF)};
   
7.     HAL_SPI_Transmit(&hSPI3, init_str, sizeof(init_str), 5);
   
8.     HAL_SPI_Receive_DMA(&hSPI3, pBuffer, NumBytes);
   
9.     /* 等待发送完毕 */
   
10.     SPI3_CS_HIGH();
    
11.     return 0;
    
12. }

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不懂，帮顶

不懂，帮顶

不懂，帮顶