About AHigg

AHigg · 2022-06-01

Sorry to bring up the elephant in the room. I just reviewed the ST Q1 quarterly results from April and was astonished to not find anything related to lead times, shortages, or allocations.My company is in the Musical Instrument space. We work with a ...

AHigg · 2019-01-14

Hello all,I have worked through a number of issues with the SDMMC system and am currently stuck with not being able to reliably transfer from micro SD. I wrote test code to repeatedly read a file from the external card. In some cases HAL_SD_ErrorCall...

AHigg · 2022-06-06

Thanks all for the answers. We have looked at GigaDevice. They don't have the Cortex M7 we need. We checked notes with another company in our space and they are seeing 1-2 year deliveries on NXP processors. So we are certainly not alone.

AHigg · 2019-05-06

This change ultimately proved to be the answer:uint32_t SDMMC_CmdReadMultiBlock(SDMMC_TypeDef *SDMMCx, uint32_t ReadAdd) { uint32_t maskReg = SDMMCx->MASK; SDMMCx->MASK = 0; SDMMC_CmdInitTypeDef sdmmc_cmdinit; uint32_t errorstate; ...

AHigg · 2019-01-23

Here is a patch to stm32h77xx_II_sdmmc.c that looks promising. Note the difference in line 16 where SDMMC_FLAG_BUSYD0END is removed from the conditional.static uint32_t SDMMC_GetCmdResp1(SDMMC_TypeDef *SDMMCx, uint8_t SD_CMD, uint32_t Timeout) { ui...

AHigg · 2019-01-19

I’m not sure where you are headed with this. I do have a debug port available on USART2, pins PD5 and PD6. I haven’t used it before.I am using a Segger J-Link on the SWD port for debugging purposes.I did run some of your test code on the Nucleo with ...

AHigg · 2019-01-19

Clive,Thanks again, at this point I have to conclude the PCB and circuit is good but there is some kind of SDMMC state machine/driver stack problem. Specifically, I see the state machine crash following a multiblock transfer and a SDMMC_CMD_STOP_TRAN...

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What lead times and deliveries are you seeing?

STM32H743 unreliable micro SD transfers

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Re: STM32H743 unreliable micro SD transfers

Re: STM32H743 unreliable micro SD transfers

Re: STM32H743 unreliable micro SD transfers