Hi All,
I wish to use an 8 GByte Hi speed micro SD card to log data on an STM32H743VIT (100 Pin pkg) custom board. The system is being used as a precision mains voltage and power quality monitor with a basic WiFi Modem.
I have got all the analog processing working fine but am struggling with the SD Card software.
I am using freeRTOS and wish to read and write to the card in non-blocking mode.
I noticed that the driver config file (stm32h7xx_hal_conf.h) has the following entry:
#define USE_SD_TRANSCEIVER 1U /*!< use uSD Transceiver */
The example for the H7 Eval board (which is now unobtainable) uses a transceiver for the SD Card. I guess that's for reliable operation at high speed. I don't have any experience with SD cards and I have the following questions.
- Should I use an SD card transceiver or can I connect the card up to the sdmmc1 port without it?
- Is the example SD Card freeRTOS code example for the Eval board STM32H743XI OK to use and is it non-blocking?
- If the code has errors does anyone know what they are?
- Has anyone got a u sd card working in non-blocking mode?
- Does anyone know where I can get the H743 Evaluation Board?
The software example I am using is:
\STM32Cube_FW_H7_V1.3.0\Projects\STM32H743I_EVAL\Applications\FatFs\FatFs_uSD_DMA_RTOS
Rob
