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Utilise avr_can_skip_write_byte()

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This commit is contained in:
Stefan Rueger
2026-03-25 17:58:00 +00:00
parent 7a7b072a9b
commit 2a5425245d
1 changed files with 7 additions and 17 deletions
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24
src/avr.c
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@@ -693,7 +693,6 @@ int avr_write_byte_default(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM
int ready;
int tries;
unsigned long start, now;
unsigned char b;
unsigned short caddr;
OPCODE *writeop;
int rc;
@@ -770,29 +769,19 @@ int avr_write_byte_default(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM
goto success;
}
int bm = avr_mem_bitmask(p, mem, addr);
if(!mem->paged && (p->flags & AVRPART_IS_AT90S1200) == 0) {
/*
* Check to see if the write is necessary by reading the existing value and
* only write if we are changing the value; we can't use this optimization
* for paged addressing.
*
* For mysterious reasons, on the AT90S1200, this read operation sometimes
* causes the high byte of the same word to be programmed to the value of
* the low byte that has just been programmed before. Avoid that
* optimization on this device.
*/
rc = pgm->read_byte(pgm, p, mem, addr, &b);
// Check to see if writing could be skipped
int rbrc, skip = avr_can_skip_write_byte(pgm, p, mem, addr, data, &rbrc);
if(rbrc != -99) { // read_byte() was executed
rc = rbrc;
if(rc != 0) {
if(rc != -1) {
rc = -2;
goto rcerror;
}
// Read operation is not support on this memory
// Read operation is not supported on this memory
} else {
readok = 1;
if((b & bm) == (data & bm))
if(skip)
goto success;
}
}
@@ -836,6 +825,7 @@ int avr_write_byte_default(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM
goto success;
}
int bm = avr_mem_bitmask(p, mem, addr);
tries = 0;
ready = 0;
while(!ready) {