/*
* USBaspの通信ブロック単位(200bytes)で分割して書き込む
*/
int usbasp_blockwrite(
int function,
int address,
unsigned char *buffer,
int n_bytes,
int page_size,
unsigned char flags
)
{
unsigned char cmd[4];
int blocksize, n;
int top = address;
int wbytes = n_bytes;
unsigned char blockflags = USBASP_BLOCKFLAG_FIRST;
while (wbytes > 0) {
if (function == USBASP_FUNC_WRITEEEPROM) {
blocksize = 1;
wbytes -= 1;
} else if (wbytes > USBASP_WRITEBLOCKSIZE) {
blocksize = USBASP_WRITEBLOCKSIZE;
wbytes -= USBASP_WRITEBLOCKSIZE;
} else {
blocksize = wbytes;
wbytes = 0;
blockflags |= USBASP_BLOCKFLAG_LAST;
}
cmd[0] = address & 0xFF;
cmd[1] = address >> 8;
cmd[2] = page_size;
cmd[3] = blockflags | flags;
blockflags = 0;
n = usbasp_transmit(0, function, cmd, buffer, blocksize);
if (function == USBASP_FUNC_WRITEEEPROM) {
delay_ms(Device->EepromWait);
}
if (n != blocksize)
break;
buffer += blocksize;
address += blocksize;
#if AVRSPX
report_update(n);
#else
//@ report_progress (address, n_bytes, NULL);
#endif
}
return address - top;
}
/*
* USBaspの通信ブロック単位(200bytes)で分割して読み込む
*/
int usbasp_paged_load_sub(int function, int address,
unsigned char *buffer, int n_bytes, unsigned char flags)
{
int n;
unsigned char cmd[4];
int wbytes = n_bytes;
int blocksize;
while (wbytes > 0) {
if (wbytes > USBASP_READBLOCKSIZE) {
blocksize = USBASP_READBLOCKSIZE;
wbytes -= USBASP_READBLOCKSIZE;
} else {
blocksize = wbytes;
wbytes = 0;
}
cmd[0] = address & 0xFF;
cmd[1] = address >> 8;
cmd[2] = 0x5A; //@@ magic no by t.k
cmd[3] = flags; //@@
n = usbasp_transmit(1, function, cmd, buffer, blocksize);
if (n != blocksize) {
fprintf(stderr, "%s: error: wrong reading bytes %x\n",
progname, n);
return -1;
}
buffer += blocksize;
address += blocksize;
#if AVRSPX
report_update(n);
#else
//@ report_progress (address, n_bytes, NULL);
#endif
}
return n_bytes;
}
void loop() {
scan();
report_update();
}
