About M.CHN

M.CHN · 2020-08-13

Hello everyone, I am facing a strange issue. I am working with a nucleo-h743ZI2 biard using SDMMC1with fatfs to write data on µSD card. I have 2 SD card with apparently the same characteristics : 4GB, SDHC, class 10. SDMMC is set in 1 bit mode (4 bi...

M.CHN · 2020-08-13

Hello, I am trying to use a µSD card with a nucleo-h743zi2card. I use SDMMC1 peripheral and FatFS middleware. When I set SDMMC1 in 1 bit mode my program works perfectly, but when I set the peripheral in 4 bits mode the card is not mounted. When I deb...

M.CHN · 2020-08-11

Hello, I am working on a project in which I have to store the data from my ADC (in continuous mode with DMA) on a SD card (with FATFS and SDMMC1) without losses. I try to use a ping pong buffer but when I want to change the bufferinwhich the ADC stor...

M.CHN · 2020-07-29

Hello, I am working on a project in which I have to write data from my adc into a µSD card using SDMMC1 peripheral.In my testing program to see the ADC1 behaviour with the DMA all work. My buffer stores the datas from my ADC using DMA and the callaba...

M.CHN · 2020-07-15

Hello everyone, I am working on a project in which I need to store data on extern memory with a nucleo-H743ZI2 board. I choose to use an SD card (SDHC Class 10, with 4Gb) because it is smaller than a usb key.I use SDMMC1 on PLL1Q at 48MHz and the clo...

M.CHN · 2020-08-18

I finally succeded in using my SD card in 4 bit mode. I was still loosing some datas but when I set my buffer length to 32768 as @Community member told me to do all work perfectly. Thank you all for your help. :grinning_face:

M.CHN · 2020-08-17

Hello Clive thank you for your help, I don't find SB117, SB116 on my board (I higher SB that I see is SB82), if you were talking about SB17/SB16, there are no resistors on these SB. I use your hex file to understand what happens on 2 different µSD ( ...

M.CHN · 2020-08-14

I agree but the problem is that wen I try to maximize my file write speed I have error. I had "better" results when I set my SDMMC clock to 48 MHz with a divider of 10 ( if I understood well the datasheet I should have sdmmc clk near to 2,4 MHz which...

M.CHN · 2020-08-12

Ok, thanks four your help, I will try with these buffer sizes. However, I don't understand why I have the RXOVERRUN flag when I mount the card in 4 bits mode. I saw things about the parameter clock divider, or setting SDMMC1 pin with pull-up but not...

M.CHN · 2020-08-12

Thank you for your help. I was already using HAL_ADC_ConvHalfCpltCallback and even with it I lose datas :downcast_face_with_sweat: .

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Why 2 SD cards with the same characteristics won't work the same way on SDMMC1 peripheral (STM32H743ZI)

SDMMC1 working in 4bits mode with FatFS STM32H743

Store ADC's data stream without losses

Making ADC with DMA working with µSD card (SDMMC1 + FATFS) on NUCLEO-H743ZI2

HAL_SD_ERROR_DATA_TIMEOUT on stm32H743ZI2 when I try to use SD card with SDMMC1+ FATFS

Re: Store ADC's data stream without losses

Re: SDMMC1 working in 4bits mode with FatFS STM32H743

Re: Store ADC's data stream without losses

Re: Store ADC's data stream without losses

Re: Store ADC's data stream without losses