- <article data-content="[{"type":"block","id":"pfSY-1742737651919","name":"code","data":{"wrap":false,"tokensPerLine":[],"language":"","theme":"default"},"nodes":[{"type":"block","id":"YdWK-1742737651918","name":"code-line","data":{},"nodes":[{"type":"text","id":"GG3Q-1742737651917","leaves":[{"text":"void SPI_Loopback_Test(void) \r","marks":[]}]}]},{"type":"block","id":"jtJY-1742737679191","name":"code-line","data":{},"nodes":[{"type":"text","id":"KKjJ-1742737679190","leaves":[{"text":"{\r","marks":[]}]}]},{"type":"block","id":"y66Y-1742737679193","name":"code-line","data":{},"nodes":[{"type":"text","id":"Q32M-1742737679192","leaves":[{"text":" uint8_t tx_buffer[16] = {0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,\r","marks":[]}]}]},{"type":"block","id":"Dpwb-1742737679196","name":"code-line","data":{},"nodes":[{"type":"text","id":"LLmz-1742737679194","leaves":[{"text":" 0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0x10};\r","marks":[]}]}]},{"type":"block","id":"f9v0-1742737679198","name":"code-line","data":{},"nodes":[{"type":"text","id":"7xI6-1742737679197","leaves":[{"text":" uint8_t rx_buffer[16] = {0};\r","marks":[]}]}]},{"type":"block","id":"pfEo-1742737679200","name":"code-line","data":{},"nodes":[{"type":"text","id":"MHkJ-1742737679199","leaves":[{"text":" \r","marks":[]}]}]},{"type":"block","id":"p03a-1742737679202","name":"code-line","data":{},"nodes":[{"type":"text","id":"UbzP-1742737679201","leaves":[{"text":" // 发送并接收数据\r","marks":[]}]}]},{"type":"block","id":"nLed-1742737679204","name":"code-line","data":{},"nodes":[{"type":"text","id":"AlHr-1742737679203","leaves":[{"text":" HAL_SPI_TransmitReceive(&hspi3, tx_buffer, rx_buffer, 16, 100);\r","marks":[]}]}]},{"type":"block","id":"skOr-1742737679206","name":"code-line","data":{},"nodes":[{"type":"text","id":"8RHW-1742737679205","leaves":[{"text":" \r","marks":[]}]}]},{"type":"block","id":"3D0m-1742737679208","name":"code-line","data":{},"nodes":[{"type":"text","id":"d4rH-1742737679207","leaves":[{"text":" // 验证数据一致性\r","marks":[]}]}]},{"type":"block","id":"vnfE-1742737679210","name":"code-line","data":{},"nodes":[{"type":"text","id":"h6pq-1742737679209","leaves":[{"text":" if(memcmp(tx_buffer, rx_buffer, 16) == 0) {\r","marks":[]}]}]},{"type":"block","id":"X7WW-1742737679212","name":"code-line","data":{},"nodes":[{"type":"text","id":"T6a4-1742737679211","leaves":[{"text":" // 数据匹配，测试通过\r","marks":[]}]}]},{"type":"block","id":"ANN1-1742737679214","name":"code-line","data":{},"nodes":[{"type":"text","id":"Sh10-1742737679213","leaves":[{"text":" HAL_UART_Transmit(&huart1, (uint8_t *)&rx_buffer, 16, 0xFFFF);\r","marks":[]}]}]},{"type":"block","id":"gHL0-1742737679216","name":"code-line","data":{},"nodes":[{"type":"text","id":"oZGd-1742737679215","leaves":[{"text":" }\r","marks":[]}]}]},{"type":"block","id":"jlks-1742737679218","name":"code-line","data":{},"nodes":[{"type":"text","id":"WMMt-1742737679217","leaves":[{"text":"}","marks":[]}]}]}],"state":{}}]"><div yne-bulb-block="code" data-theme="default" style="white-space-collapse: preserve;" data-language="">void SPI_Loopback_Test(void)
- {
- uint8_t tx_buffer[16] = {0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,
- 0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0x10};
- uint8_t rx_buffer[16] = {0};
-
- // 发送并接收数据
- HAL_SPI_TransmitReceive(&hspi3, tx_buffer, rx_buffer, 16, 100);
-
- // 验证数据一致性
- if(memcmp(tx_buffer, rx_buffer, 16) == 0) {
- // 数据匹配，测试通过
- HAL_UART_Transmit(&huart1, (uint8_t *)&rx_buffer, 16, 0xFFFF);
- }
- }</div></article>
效果如下：
可以看到数据收到后通过串口发送了出来，和传输的数据是一样的，其实SPI还有很多用处，很多外设模块使用的都是SPI接口，有时候只发送（比如一些TFT的控制），更多的是传感器，不过需要注意很多从机的传感器是需要主机提供时钟的，也就是说在读取的时候也需要主机给时钟驱动。
楼主
