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Provide avr_update_write_byte()

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This commit is contained in:
Stefan Rueger
2026-03-25 18:27:37 +00:00
parent f6e2a80379
commit 5b0d7689d2
2 changed files with 27 additions and 2 deletions
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23
src/avr.c
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@@ -912,6 +912,29 @@ rcerror:
return rc;
}
// Update one byte of data at the specified address, ie, write unless already there
int avr_update_byte(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *mem,
unsigned long addr, unsigned char data) {
pmsg_debug("%s(%s, %s, %s, %s, 0x%02x)\n", __func__, pgmid, p->id, mem->desc,
str_ccaddress(addr, mem->size), data);
if(avr_can_skip_write_byte(pgm, p, mem, addr, data, NULL))
return 0;
if(mem_is_readonly(mem) || (pgm->readonly && pgm->readonly(pgm, p, mem, addr))) {
pmsg_error("cannot write to %s memory %s of %s\n",
mem_is_readonly(mem)? "read-only": "write-protected", mem->desc, p->desc);
return -1;
}
if(pgm->write_byte != avr_write_byte_default)
if(!(p->prog_modes & (PM_UPDI | PM_aWire))) // Initialise unused bits in classic & XMEGA parts
data = avr_bitmask_data(pgm, p, mem, addr, data);
return pgm->write_byte(pgm, p, mem, addr, data);
}
// Write a byte of data at the specified address
int avr_write_byte(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *mem,
unsigned long addr, unsigned char data) {

6
src/libavrdude.h
View File

@@ -1168,8 +1168,6 @@ extern "C" {
uint64_t avr_mstimestamp(void);
double avr_timestamp(void);
void init_cx(PROGRAMMER *pgm);
int avr_write_byte(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *mem,
unsigned long addr, unsigned char data);
int avr_read_byte_silent(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *mem,
unsigned long addr, unsigned char *datap);
int avr_bitmask_data(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *mem,
@@ -1178,6 +1176,10 @@ extern "C" {
unsigned long addr, uint8_t wanted, int *readrc);
int avr_write_byte_default(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *mem,
unsigned long addr, unsigned char data);
int avr_update_byte(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *mem,
unsigned long addr, unsigned char data);
int avr_write_byte(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *mem,
unsigned long addr, unsigned char data);
int avr_write_mem(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *mem, int size, int auto_erase);
int avr_write(const PROGRAMMER *pgm, const AVRPART *p, const char *memstr, int size, int auto_erase);
int avr_signature(const PROGRAMMER *pgm, const AVRPART *p);