Posted on May 17, 2011 at 09:59Dear All,
I are facing a problem while writing secondary flash, the time taken to write a single halfword is more then 500ms.
As per Eratta sheet(rev 5) for STR912FAw44 MCU, for writing to flash we need to set the bit 18 of configuration register of ARM core.
I have tried by writing the code given in eratta sheet
1. Before flash writing command, in this case the MCU takes more then 500 ms to write a single half word to flash. i.e. no change from earlier case.
2. After the flash writing command, in this case the MCU hangs as soon as the first halfword command is executed.
The code is pasted below.
Please help us, we need to reduce the time required the flash.
The scu clock for flash is also enable while initializing the MCU.
u8 Flash_Write_Word(u32 FlashSector,u32 Offset,u16 *DataWord)
{
u8 FMI_Timeout_Status=0;
u32 flashAddress;
FMI_WriteProtectionCmd(FlashSector, DISABLE);
FMI_EraseSector(FlashSector);
FMI_WaitForLastOperation(FMI_BANK_1);
flashAddress=FlashSector+Offset*2;
__asm
{
MOV R0, #0x00000
MCR p15,0x1,R0,c15,c1,0
}
// the following steps consume more then 500 ms....?
FMI_WriteHalfWord(flashAddress,*DataWord);
FMI_WaitForLastOperation(FMI_BANK_1);
}
Thanks in advance.
Satnam Singh
