hello everyone
i have been working with a custom board F429IG
LTDC RGB565
SDRAM 32MB 16bit data width
STMCUBE IDE and CUBEMX 5.6
i have tested each hardware separately and they seem to work fine .
created a project to show just a button in 7" LCD 800X480 resoulotion
at first i programed the micro to use extrenal SDRAM as buffer but the picture went very bad
then i changed the SDRAM address from 0XC0000000 to internal address of 0X20020000 and i get this result which is perfect
here is 2 other pictures from 800x480 test in external memory
and my memory configuration
/** 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_16;
hsdram1.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
hsdram1.Init.CASLatency = FMC_SDRAM_CAS_LATENCY_3;
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_0;
/* SdramTiming */
SdramTiming.LoadToActiveDelay = 2;
SdramTiming.ExitSelfRefreshDelay = 7;
SdramTiming.SelfRefreshTime = 6;
SdramTiming.RowCycleDelay = 6;
SdramTiming.WriteRecoveryTime = 5;
SdramTiming.RPDelay = 2;
SdramTiming.RCDDelay = 2;
if (HAL_SDRAM_Init(&hsdram1, &SdramTiming) != HAL_OK)
{
Error_Handler( );
}
HAL_SDRAM_WriteProtection_Disable(&hsdram1);
HAL_Delay(100);
FMC_SDRAM_CommandTypeDef command;
///////////////////////////////////////////////////////////Clock
command.CommandMode= FMC_SDRAM_CMD_CLK_ENABLE;
command.CommandTarget= FMC_SDRAM_CMD_TARGET_BANK1;
command.AutoRefreshNumber=1;
command.ModeRegisterDefinition=0;
HAL_SDRAM_SendCommand(&hsdram1, &command, 5000);
HAL_Delay(10);
///////////////////////////////////////////////////////////Precharge
HAL_Delay(100);
command.CommandMode= FMC_SDRAM_CMD_PALL;
command.CommandTarget= FMC_SDRAM_CMD_TARGET_BANK1;
command.AutoRefreshNumber=1;
command.ModeRegisterDefinition=0;
HAL_Delay(10);
///////////////////////////////////////////////////////////SELF REFRESH
command.CommandMode= FMC_SDRAM_CMD_SELFREFRESH_MODE;
command.CommandTarget= FMC_SDRAM_CMD_TARGET_BANK1;
command.AutoRefreshNumber=10;
command.ModeRegisterDefinition=0;
HAL_SDRAM_SendCommand(&hsdram1, &command, 5000);
HAL_Delay(10);
///////////////////////////////////////////////////////////MODE SETTINGS
command.CommandMode= FMC_SDRAM_CMD_LOAD_MODE;
command.CommandTarget= FMC_SDRAM_CMD_TARGET_BANK1;
command.AutoRefreshNumber=1;
command.ModeRegisterDefinition=0X00000133;
HAL_SDRAM_SendCommand(&hsdram1, &command, 5000);
HAL_Delay(10);
HAL_SDRAM_SetAutoRefreshNumber(&hsdram1, 730);My SDRAM is MT48LC16m16
i Think i am missing something but i cant figure it out
i am using no OS and tested the program with and without ChromeART (same result)
