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/*
* SREC send routine.
*/
#include <string.h>
#include <stdio.h>
#include "srecsend.h"
static void make_srec(struct serial_if *sif, char type, size_t addr,
const void *data, size_t len)
{
char buf[80]; /* More than the largest possible size */
char *p;
const uint8_t *dp = data;
size_t alen = (type == '0') ? 4 : 8;
uint8_t csum;
p = buf;
p += sprintf(p, "S%c%02X%0*zX", type, len+alen+1, alen, addr);
csum = (len+alen+1) + addr + (addr >> 8) + (addr >> 16) + (addr >> 24);
while (len) {
p += sprintf(p, "%02X", *dp);
csum += *dp;
dp++;
}
csum = 0xff - csum;
p += sprintf(p, "%02X\r\n", csum);
sif->write(sif, buf, p-buf);
}
void send_srec(struct serial_if *sif, struct file_info *fileinfo,
void (*gen_data) (void *, size_t, struct file_info *, size_t))
{
uint8_t blk_buf[1024];
const uint8_t *np;
size_t addr, len, bytes, chunk, offset, pos;
int blk;
len = fileinfo->size;
make_srec(sif, '0', 0, NULL, 0);
blk = 0;
pos = 0;
addr = fileinfo->base;
while (len) {
gen_data(blk_buf, sizeof blk_buf, fileinfo, pos);
pos += sizeof blk_buf;
bytes = sizeof blk_buf;
if (bytes > len)
bytes = len;
len -= bytes;
printf("Sending block %d...\r", blk);
np = blk_buf;
while (bytes) {
chunk = bytes > 32 ? 32 : bytes;
make_srec(sif, '3', addr, np, chunk);
bytes -= chunk;
offset += chunk;
np += chunk;
addr += chunk;
}
blk++;
}
printf("\nSending EOT...\n");
make_srec(sif, '7', fileinfo->base, NULL, 0);
printf("Done.\n");
}
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