nand_check_erased_buf9
Check if a buffer contains (almost) only 0xff data
Usage
int nand_check_erased_buf(void * buf, int len, int bitflips_threshold);
Arguments
buf
buffer to test
len
buffer length
bitflips_threshold
maximum number of bitflips
Overview
Check if a buffer contains only 0xff, which means the underlying region has been erased and is ready to be programmed. The bitflips_threshold specify the maximum number of bitflips before considering the region is not erased.
Note
The logic of this function has been extracted from the memweight implementation, except that nand_check_erased_buf function exit before testing the whole buffer if the number of bitflips exceed the bitflips_threshold value.
Returns a positive number of bitflips less than or equal to bitflips_threshold, or -ERROR_CODE for bitflips in excess of the threshold.