STM32H7 - SDMMC Fix the short busy loop being compiled out by newer
versions of GCC. STM32H7 - Don't go into an infinite loop if an SDIO read fails. STM32H7 - Generate compiliation error for non-8Mhz crystals when SDCARD via SDIO is used. Prevents accidental overclocking of hardware. Avoid double-init of SD card when CONFIG_IN_SDCARD is used. Note: There's no SD_DeInit() function. STM32H7 - Fix MSC SD initialisation when using USE_DMA_SPEC.
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@ -446,13 +446,13 @@ HAL_StatusTypeDef SDMMC_ConfigData(SDMMC_TypeDef *SDMMCx, SDMMC_DataInitTypeDef*
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// DC - See errata 2.11.4 - 8 SDMMC clock cycles must elapse before DTEN can be set.
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// 32U below is used as a VERY rough guess that the SDMMC clock is 1/4 of the sytem clock, 8 * 4 = 32 and that the
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// assembly below only takes 1 CPU cycle to run. All of which will be wrong, but right enough most of the time, especially
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// when considering other processing overheads.
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// loop code below only takes 2 CPU cycles to run. All of which will likely be wrong, but right enough most of the time.
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// It's important that the code isn't optimized-out by the compiler or linker too, see
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// https://stackoverflow.com/questions/7083482/how-to-prevent-gcc-from-optimizing-out-a-busy-wait-loop
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register uint32_t count = 32U;
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do
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{
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count--;
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} while(count > 0);
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for (unsigned i = 0; i < count; i++) {
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__asm__ volatile("" : "+g" (i) : :);
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}
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// DC - See errata 2.11.4
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/* Write to SDMMC DCTRL */
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@ -1654,7 +1654,7 @@ bool SD_GetState(void)
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/** -----------------------------------------------------------------------------------------------------------------*/
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SD_Error_t SD_Init(void)
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static SD_Error_t SD_DoInit(void)
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{
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SD_Error_t errorState;
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@ -1704,6 +1704,22 @@ SD_Error_t SD_Init(void)
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return errorState;
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}
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SD_Error_t SD_Init(void)
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{
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static bool sdInitAttempted = false;
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static SD_Error_t result = SD_ERROR;
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if (sdInitAttempted) {
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return result;
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}
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sdInitAttempted = true;
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result = SD_DoInit();
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return result;
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}
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/** -----------------------------------------------------------------------------------------------------------------*/
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/**
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* @brief This function handles SD card interrupt request.
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@ -1637,7 +1637,7 @@ bool SD_GetState(void)
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/** -----------------------------------------------------------------------------------------------------------------*/
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SD_Error_t SD_Init(void)
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static SD_Error_t SD_DoInit(void)
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{
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SD_Error_t errorState;
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@ -1683,6 +1683,23 @@ SD_Error_t SD_Init(void)
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return errorState;
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}
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SD_Error_t SD_Init(void)
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{
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static bool sdInitAttempted = false;
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static SD_Error_t result = SD_ERROR;
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if (sdInitAttempted) {
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return result;
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}
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sdInitAttempted = true;
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result = SD_DoInit();
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return result;
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}
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/** -----------------------------------------------------------------------------------------------------------------*/
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/**
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* @brief This function handles SD card interrupt request.
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@ -47,6 +47,9 @@ typedef struct SD_Handle_s
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uint32_t CID[4]; // SD card identification number table
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volatile uint32_t RXCplt; // SD RX Complete is equal 0 when no transfer
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volatile uint32_t TXCplt; // SD TX Complete is equal 0 when no transfer
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uint32_t RXErrors;
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uint32_t TXErrors;
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} SD_Handle_t;
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SD_HandleTypeDef hsd1;
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@ -54,7 +57,7 @@ SD_HandleTypeDef hsd1;
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SD_CardInfo_t SD_CardInfo;
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SD_CardType_t SD_CardType;
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static SD_Handle_t SD_Handle;
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SD_Handle_t SD_Handle;
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typedef struct sdioPin_s {
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ioTag_t pin;
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@ -260,7 +263,7 @@ bool SD_GetState(void)
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return (cardState == HAL_SD_CARD_TRANSFER);
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}
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SD_Error_t SD_Init(void)
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static SD_Error_t SD_DoInit(void)
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{
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HAL_StatusTypeDef status;
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@ -516,6 +519,22 @@ SD_Error_t SD_GetCardInfo(void)
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return ErrorState;
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}
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SD_Error_t SD_Init(void)
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{
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static bool sdInitAttempted = false;
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static SD_Error_t result = SD_ERROR;
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if (sdInitAttempted) {
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return result;
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}
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sdInitAttempted = true;
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result = SD_DoInit();
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return result;
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}
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SD_Error_t SD_CheckWrite(void) {
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if (SD_Handle.TXCplt != 0) return SD_BUSY;
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return SD_OK;
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@ -615,6 +634,20 @@ void HAL_SD_RxCpltCallback(SD_HandleTypeDef *hsd)
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SCB_InvalidateDCache_by_Addr((uint32_t*)alignedAddr, sdReadParameters.NumberOfBlocks * sdReadParameters.BlockSize + ((uint32_t)sdReadParameters.buffer - alignedAddr));
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}
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void HAL_SD_ErrorCallback(SD_HandleTypeDef *hsd)
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{
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UNUSED(hsd);
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if (SD_Handle.RXCplt) {
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SD_Handle.RXErrors++;
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SD_Handle.RXCplt = 0;
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}
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if (SD_Handle.TXCplt) {
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SD_Handle.TXErrors++;
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SD_Handle.TXCplt = 0;
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}
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}
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void HAL_SD_AbortCallback(SD_HandleTypeDef *hsd)
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{
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UNUSED(hsd);
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@ -167,13 +167,17 @@ static int8_t STORAGE_Init (uint8_t lun)
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LED0_OFF;
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#ifdef USE_DMA_SPEC
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const dmaChannelSpec_t *dmaChannelSpec = dmaGetChannelSpecByPeripheral(DMA_PERIPH_SDIO, 0, sdioConfig()->dmaopt);
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#if defined(STM32H7) // H7 uses IDMA
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SD_Initialize_LL(0);
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#else
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const dmaChannelSpec_t *dmaChannelSpec = dmaGetChannelSpecByPeripheral(DMA_PERIPH_SDIO, 0, sdioConfig()->dmaopt);
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if (!dmaChannelSpec) {
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return 1;
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}
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SD_Initialize_LL((DMA_ARCH_TYPE *)dmaChannelSpec->ref);
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#endif
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#else
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SD_Initialize_LL(SDCARD_SDIO_DMA_OPT);
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#endif
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@ -181,7 +185,7 @@ static int8_t STORAGE_Init (uint8_t lun)
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if (!sdcard_isInserted()) {
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return 1;
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}
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if (SD_Init() != 0) {
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if (SD_Init() != SD_OK) {
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return 1;
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}
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@ -596,6 +596,11 @@ void SystemClock_Config(void)
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#ifdef USE_SDCARD_SDIO
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RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_SDMMC;
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#if (HSE_VALUE != 8000000)
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#error Unsupported external oscillator speed. The calculations below are based on 8Mhz resonators
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// if you are seeing this, then calculate the PLL2 settings for your resonator and add support as required.
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#else
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RCC_PeriphClkInit.PLL2.PLL2M = 5;
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RCC_PeriphClkInit.PLL2.PLL2N = 500;
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RCC_PeriphClkInit.PLL2.PLL2P = 2; // 500Mhz
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@ -606,6 +611,8 @@ void SystemClock_Config(void)
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RCC_PeriphClkInit.PLL2.PLL2FRACN = 0;
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RCC_PeriphClkInit.SdmmcClockSelection = RCC_SDMMCCLKSOURCE_PLL2;
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HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit);
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#endif // 8Mhz HSE_VALUE
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#endif
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// Configure MCO clocks for clock test/verification
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