Originally I had the project initialize all devices in main.c. Since the file was starting to get large, i went to the Code Generator in CubeMX and selected:
The option to "Keep User Code when re-generating" just doesn't work reliably. It seems it did not keep the "User Code" for the FMC device, and possibly the RTC device.... I now have to check each and every device manually.
Original FMC init code:
/* FMC initialization function */
static void MX_FMC_Init(void)
{
/* USER CODE BEGIN FMC_Init 0 */
/* USER CODE END FMC_Init 0 */
FMC_SDRAM_TimingTypeDef SdramTiming = {0};
/* USER CODE BEGIN FMC_Init 1 */
/* USER CODE END FMC_Init 1 */
/** Perform the SDRAM1 memory initialization sequence
*/
hsdram1.Instance = FMC_SDRAM_DEVICE;
/* hsdram1.Init */
hsdram1.Init.SDBank = FMC_SDRAM_BANK1;
hsdram1.Init.ColumnBitsNumber = FMC_SDRAM_COLUMN_BITS_NUM_9;
hsdram1.Init.RowBitsNumber = FMC_SDRAM_ROW_BITS_NUM_13;
hsdram1.Init.MemoryDataWidth = FMC_SDRAM_MEM_BUS_WIDTH_32;
hsdram1.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
hsdram1.Init.CASLatency = FMC_SDRAM_CAS_LATENCY_2;
hsdram1.Init.WriteProtection = FMC_SDRAM_WRITE_PROTECTION_DISABLE;
hsdram1.Init.SDClockPeriod = FMC_SDRAM_CLOCK_PERIOD_2;
hsdram1.Init.ReadBurst = FMC_SDRAM_RBURST_ENABLE;
hsdram1.Init.ReadPipeDelay = FMC_SDRAM_RPIPE_DELAY_2;
/* SdramTiming */
SdramTiming.LoadToActiveDelay = 2;
SdramTiming.ExitSelfRefreshDelay = 7;
SdramTiming.SelfRefreshTime = 5;
SdramTiming.RowCycleDelay = 6;
SdramTiming.WriteRecoveryTime = 3;
SdramTiming.RPDelay = 2;
SdramTiming.RCDDelay = 2;
if (HAL_SDRAM_Init(&hsdram1, &SdramTiming) != HAL_OK)
{
Error_Handler( );
}
/* USER CODE BEGIN FMC_Init 2 */
FMC_SDRAM_CommandTypeDef Command;
/* Step 1 and Step 2 already done in HAL_SDRAM_Init() */
/* Step 3: Configure a clock configuration enable command */
Command.CommandMode = FMC_SDRAM_CMD_CLK_ENABLE; /* Set MODE bits to "001" */
Command.CommandTarget = FMC_SDRAM_CMD_TARGET_BANK1; /* configure the Target Bank bits */
Command.AutoRefreshNumber = 1;
Command.ModeRegisterDefinition = 0;
if (HAL_SDRAM_SendCommand(&hsdram1, &Command, 0xfff) != HAL_OK) {
printf("Step 3 error\r\n");
}
/* Step 4: Insert 100 us minimum delay - Min HAL Delay is 1ms */
HAL_Delay(1);
/* Step 5: Configure a PALL (precharge all) command */
Command.CommandMode = FMC_SDRAM_CMD_PALL; /* Set MODE bits to "010" */
if (HAL_SDRAM_SendCommand(&hsdram1, &Command, 0xfff) != HAL_OK) {
printf("Step 5 error\r\n");
}
/* Step 6: Configure an Auto Refresh command */
Command.CommandMode = FMC_SDRAM_CMD_AUTOREFRESH_MODE; /* Set MODE bits to "011" */
Command.AutoRefreshNumber = 2;
if (HAL_SDRAM_SendCommand(&hsdram1, &Command, 0xfff) != HAL_OK) {
printf("Step 6 error\r\n");
}
/* Step 7: Program the external memory mode register */
Command.CommandMode = FMC_SDRAM_CMD_LOAD_MODE;/*set the MODE bits to "100" */
Command.ModeRegisterDefinition = (uint32_t) 0 | 0 << 3 | 2 << 4 | 0 << 7
| 1 << 9;
if (HAL_SDRAM_SendCommand(&hsdram1, &Command, 0xfff) != HAL_OK) {
printf("Step 7 error\r\n");
}
/* Step 8: Set the refresh rate counter - refer to section SDRAM refresh timer register in RM0455 */
/* Set the device refresh rate
* COUNT = [(SDRAM self refresh time / number of row) x SDRAM CLK] – 20
= [(64ms/4096) * 100MHz] - 20 = 1562.5 - 20 ~ 1542 */
/* (64ms/8192) * 100MHz) - 20 = 781.25 - 20 = 761 */
if (HAL_SDRAM_ProgramRefreshRate(&hsdram1, 761) != HAL_OK) {
printf("Step 8 error\r\n");
}
/* USER CODE END FMC_Init 2 */
}
What CubeMX put in the fmc.c file is:
/* FMC initialization function */
void MX_FMC_Init(void)
{
/* USER CODE BEGIN FMC_Init 0 */
/* USER CODE END FMC_Init 0 */
FMC_SDRAM_TimingTypeDef SdramTiming = {0};
/* USER CODE BEGIN FMC_Init 1 */
/* USER CODE END FMC_Init 1 */
/** Perform the SDRAM1 memory initialization sequence
*/
hsdram1.Instance = FMC_SDRAM_DEVICE;
/* hsdram1.Init */
hsdram1.Init.SDBank = FMC_SDRAM_BANK1;
hsdram1.Init.ColumnBitsNumber = FMC_SDRAM_COLUMN_BITS_NUM_9;
hsdram1.Init.RowBitsNumber = FMC_SDRAM_ROW_BITS_NUM_13;
hsdram1.Init.MemoryDataWidth = FMC_SDRAM_MEM_BUS_WIDTH_32;
hsdram1.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
hsdram1.Init.CASLatency = FMC_SDRAM_CAS_LATENCY_2;
hsdram1.Init.WriteProtection = FMC_SDRAM_WRITE_PROTECTION_DISABLE;
hsdram1.Init.SDClockPeriod = FMC_SDRAM_CLOCK_PERIOD_2;
hsdram1.Init.ReadBurst = FMC_SDRAM_RBURST_ENABLE;
hsdram1.Init.ReadPipeDelay = FMC_SDRAM_RPIPE_DELAY_2;
/* SdramTiming */
SdramTiming.LoadToActiveDelay = 2;
SdramTiming.ExitSelfRefreshDelay = 7;
SdramTiming.SelfRefreshTime = 5;
SdramTiming.RowCycleDelay = 6;
SdramTiming.WriteRecoveryTime = 3;
SdramTiming.RPDelay = 2;
SdramTiming.RCDDelay = 2;
if (HAL_SDRAM_Init(&hsdram1, &SdramTiming) != HAL_OK)
{
Error_Handler( );
}
/* USER CODE BEGIN FMC_Init 2 */
/* USER CODE END FMC_Init 2 */
}
Some "User Code" was put in the new files, in other places it just dropped the user code.
