Posted on October 12, 2015 at 22:02Hi,
The Micron M25P128 flash seems to be writing and reading OK. As clive1 suggested, the SPI flash functionality is written in the Std Peripheral examples, so I am using that.
When I execute the call to: sFLASH_EraseSector, this function calls:
sFLASH_WaitForWriteEnd
which waits for the read status register's WIP bit to go low. Well, it never happens. It just sits there.....and spins.
How long should a call to
sFLASH_EraseSector take?
The function sFLASH_WaitForWriteEnd is pasted below.
Thanks,
Gary
*****************************************************************
void sFLASH_WaitForWriteEnd(void)
{
uint8_t flashstatus = 0;
/*!< Select the FLASH: Chip Select low */
sFLASH_CS_LOW();
/*!< Send ''Read Status Register'' instruction */
sFLASH_SendByte(sFLASH_CMD_RDSR);
/*!< Loop as long as the memory is busy with a write cycle */
do
{
/*!< Send a dummy byte to generate the clock needed by the FLASH
and put the value of the status register in FLASH_Status variable */
flashstatus = sFLASH_SendByte(sFLASH_DUMMY_BYTE);
}
while ((flashstatus & sFLASH_WIP_FLAG) == SET); /* Write in progress */
/*!< Deselect the FLASH: Chip Select high */
sFLASH_CS_HIGH();
}
