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* stk500.c: If writing flash, skip empty pages in paged write. 

git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@369 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
arcanum 2003-09-16 20:40:13 +00:00
parent e1c2db2ab1
commit 50e6ec49ae
2 changed files with 31 additions and 0 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2003-09-16 Eric B. Weddington <eric@ecentral.com>
* stk500.c: If writing flash, skip empty pages in paged write.
2003-09-06 Theodore A. Roth <troth@openavr.org>
* NEWS: Add 'Current:' header.

27
stk500.c
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@ -50,6 +50,9 @@ extern int do_cycles;
static int stk500_getparm(PROGRAMMER * pgm, unsigned parm, unsigned * value);
static int stk500_setparm(PROGRAMMER * pgm, unsigned parm, unsigned value);
static void stk500_print_parms1(PROGRAMMER * pgm, char * p);
static int stk500_is_page_empty(unsigned int address, int page_size,
const unsigned char *buf);
static int stk500_send(PROGRAMMER * pgm, char * buf, size_t len)
{
@ -687,6 +690,7 @@ static int stk500_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
int i;
int tries;
unsigned int n;
int flash;
if (page_size == 0) {
page_size = 128;
@ -694,9 +698,11 @@ static int stk500_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
if (strcmp(m->desc, "flash") == 0) {
memtype = 'F';
flash = 1;
}
else if (strcmp(m->desc, "eeprom") == 0) {
memtype = 'E';
flash = 0;
}
else {
return -2;
@ -731,6 +737,13 @@ static int stk500_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
for (addr = 0; addr < n; addr += page_size) {
report_progress (addr, n_bytes, NULL);
/* Only skip on empty page if programming flash. */
if (flash) {
if (stk500_is_page_empty(addr, page_size, m->buf)) {
continue;
}
}
tries = 0;
retry:
tries++;
@ -778,6 +791,20 @@ static int stk500_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
return n;
}
static int stk500_is_page_empty(unsigned int address, int page_size,
const unsigned char *buf)
{
int i;
for(i = 0; i < page_size; i++) {
if(buf[address + i] != 0xFF) {
/* Page is not empty. */
return(0);
}
}
/* Page is empty. */
return(1);
}
static int stk500_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
int page_size, int n_bytes)