1

我正在发送正确的命令,并且可以在示波器上看到它。但是,我没有从 SD 卡(SDHC)(SanDisk Ultra 40MB/s ...16GB)获得 0x01 响应(我一直收到 0xff)我正在使用以下代码:

uint8_t cmd0[6]={0x40,0x00,0x00,0x00,0x00,0x95};
uint8_t dumb=0xff;
FATFS_CS_HIGH;
for (int i = 0; i < 10; i++) {
   HAL_SPI_Transmit(&hspi1, &dumb, 1, 10);
   while (HAL_SPI_GetState(&hspi1) != HAL_SPI_STATE_READY);
}

FATFS_CS_LOW;

HAL_SPI_Transmit(&hspi1, cmd0, 6, 10);
while (HAL_SPI_GetState(&hspi1) != HAL_SPI_STATE_READY);

for (int i = 0; i < 10; i++) {
   HAL_SPI_Transmit(&hspi1, &dumb, 1, 10);
   while (HAL_SPI_GetState(&hspi1) != HAL_SPI_STATE_READY);
}
HAL_SPI_Receive(&hspi1, &c, 1, 10);// I keep getting 0xff

这是我从 cubeMX 用于 SPI 的配置 来自 cubeMX 的 SPI

4

0 回答 0