[嵌入式]STM32 SPI 读取12位RM08 SSI 编码器信号

不多bb 直接代码

PS : IO 模拟的看不上，遂有此作，点赞投币谢谢

	HAL_SPI_Receive(&hspi3,rx_buf,1,0xff);
	DATA = ((rx_buf[1]&0x0f)<<8 | rx_buf[0]);

SPI 配置（只在G4 平台测试 f1 f4估计不好弄）

static void MX_SPI3_Init(void)
{
  hspi3.Instance = SPI3;
  hspi3.Init.Mode = SPI_MODE_MASTER;
  hspi3.Init.Direction = SPI_DIRECTION_2LINES;
  hspi3.Init.DataSize = SPI_DATASIZE_13BIT;
  hspi3.Init.CLKPolarity = SPI_POLARITY_HIGH;
  hspi3.Init.CLKPhase = SPI_PHASE_1EDGE;
  hspi3.Init.NSS = SPI_NSS_SOFT;
  hspi3.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_128;
  hspi3.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi3.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi3.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi3.Init.CRCPolynomial = 7;
  hspi3.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
  hspi3.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
  if (HAL_SPI_Init(&hspi3) != HAL_OK)
  {
    Error_Handler();
  }
}