Re: [I] [HELP] STM32H723+SDMMC2+SDRAM(executing in sdram)+IDMA+FATFS,read/write file failure [nuttx]

[via GitHub]

snikeguo closed issue #16400: [HELP] STM32H723+SDMMC2+SDRAM(executing in 
sdram)+IDMA+FATFS,read/write file failure
URL: https://github.com/apache/nuttx/issues/16400


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Re: [I] [HELP] STM32H723+SDMMC2+SDRAM(executing in sdram)+IDMA+FATFS,read/write file failure [nuttx]

[via GitHub]

snikeguo commented on issue #16400:
URL: https://github.com/apache/nuttx/issues/16400#issuecomment-2888237447

   ```
   static sdio_capset_t stm32_capabilities(struct sdio_dev_s *dev)
   {
 struct stm32_dev_s *priv = (struct stm32_dev_s *)dev;
 sdio_capset_t caps = 0;
   
 if (priv->onebit)
   {
 caps |= SDIO_CAPS_1BIT_ONLY;
   }
   else
   {
 caps |=SDIO_CAPS_4BIT_ONLY;  //add this code
   }
   
 caps |= SDIO_CAPS_DMABEFOREWRITE;
   
   #if defined(CONFIG_STM32H7_SDMMC_IDMA)
 caps |= SDIO_CAPS_DMASUPPORTED;
   #endif
   
 return caps;
   }
   ```


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Re: [I] [HELP] STM32H723+SDMMC2+SDRAM(executing in sdram)+IDMA+FATFS,read/write file failure [nuttx]

[via GitHub]

snikeguo closed issue #16400: [HELP] STM32H723+SDMMC2+SDRAM(executing in 
sdram)+IDMA+FATFS,read/write file failure
URL: https://github.com/apache/nuttx/issues/16400


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Re: [I] [HELP] STM32H723+SDMMC2+SDRAM(executing in sdram)+IDMA+FATFS,read/write file failure [nuttx]

[via GitHub]

snikeguo commented on issue #16400:
URL: https://github.com/apache/nuttx/issues/16400#issuecomment-2888202105

   solution：
   
   CONFIG_FAT_DMAMEMORY=y
   CONFIG_GRAN=y
   CONFIG_STM32H7_SDMMC_IDMA=y
   CONFIG_ARMV7M_DCACHE_WRITETHROUGH=n see:armv7m mpu document
   
   in stm32_dmarecvsetup:
   #if defined(CONFIG_ARCH_HAVE_SDIO_PREFLIGHT)
   // DEBUGASSERT(stm32_dmapreflight(dev, buffer, buflen) == 0);
   #endif
   
   
![Image](https://github.com/user-attachments/assets/2d7b5254-76e8-4862-a80a-ed6a46340758)


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