STM32F103RCT6 HOW TO USE SDIO & UART4

[young su cho]

Posted on June 08, 2017 at 15:19

I Have a problem using sdio(1bit) and UART4.

UART4 TX does not work when SDIO is INIT.

If SDIO is not INIT, UART4 TX work.

Please tell me how to fix it.

CUBE setting are shown below.

  MX_GPIO_Init();

  MX_DMA_Init();

  MX_ADC1_Init();

  MX_IWDG_Init();

  MX_SDIO_SD_Init();

  MX_SPI1_Init();

  MX_SPI3_Init();

  MX_UART4_Init();

  MX_USART1_UART_Init();

  MX_USART2_UART_Init();

  MX_USART3_UART_Init();

  MX_FATFS_Init();

  MX_TIM6_Init();

HAL_UART_Transmit(&UART4, aTxBuffer, Transmit_Size,1000);

[Tesla DeLorean]

Posted on June 08, 2017 at 15:44

The F1 series has peripheral level remapping rather than pin level, I think PC10/PC11 probably have commonality between UART4 and SDIO, so they will conflict.

Consider a F2/F4 part where pin level association with specific peripherals is possible.

[Imen.D]

Posted on June 08, 2017 at 15:50

Hi

yougnsu.cho

,

There is alimitation related to SDIO and UART4 as mentioned in the

http://www.st.com/content/ccc/resource/technical/document/errata_sheet/f5/50/c9/46/56/db/4a/f6/CD001977pdf/files/CD001977pdf/jcr:content/translations/en.CD001977pdf

.

Please have a look to this section :2.8.8 SDIO with USART3 remapped and UART4

Best Regards

Imen