diff options
| -rw-r--r-- | ports/stm32/sdram.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/ports/stm32/sdram.c b/ports/stm32/sdram.c index e3500a121..83b002dcf 100644 --- a/ports/stm32/sdram.c +++ b/ports/stm32/sdram.c @@ -180,14 +180,14 @@ static void sdram_init_seq(SDRAM_HandleTypeDef /* Step 6 : Configure a Auto-Refresh command */ command->CommandMode = FMC_SDRAM_CMD_AUTOREFRESH_MODE; command->CommandTarget = FMC_SDRAM_CMD_TARGET_BANK; - command->AutoRefreshNumber = 4; + command->AutoRefreshNumber = MICROPY_HW_SDRAM_AUTOREFRESH_NUM; command->ModeRegisterDefinition = 0; /* Send the command */ HAL_SDRAM_SendCommand(hsdram, command, 0x1000); /* Step 7: Program the external memory mode register */ - tmpmrd = (uint32_t)SDRAM_MODEREG_BURST_LENGTH_2 | + tmpmrd = (uint32_t)FMC_INIT(SDRAM_MODEREG_BURST_LENGTH, MICROPY_HW_SDRAM_BURST_LENGTH) | SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL | FMC_INIT(SDRAM_MODEREG_CAS_LATENCY, MICROPY_HW_SDRAM_CAS_LATENCY) | SDRAM_MODEREG_OPERATING_MODE_STANDARD | @@ -222,19 +222,18 @@ static void sdram_init_seq(SDRAM_HandleTypeDef /* Disable the MPU */ HAL_MPU_Disable(); - /* Configure the MPU attributes for SDRAM */ + /* Configure the MPU attributes as Write-Through for External SDRAM */ MPU_InitStruct.Enable = MPU_REGION_ENABLE; MPU_InitStruct.BaseAddress = SDRAM_START_ADDRESS; - MPU_InitStruct.Size = MPU_REGION_SIZE_4MB; + MPU_InitStruct.Size = MPU_REGION_SIZE_8MB; MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS; MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE; - MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE; + MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE; MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE; MPU_InitStruct.Number = MPU_REGION_NUMBER0; - MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL1; + MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0; MPU_InitStruct.SubRegionDisable = 0x00; - MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE; - + MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE; HAL_MPU_ConfigRegion(&MPU_InitStruct); /* Enable the MPU */ |