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Cleaned and improved TPI send and receive.

This commit is contained in:
Jan Egil Ruud 2022-11-22 14:05:01 +01:00
parent 3afdd55089
commit 5dc2545716
1 changed files with 26 additions and 14 deletions
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40
src/jtag3.c
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@ -165,6 +165,22 @@ u16_to_b2(unsigned char *b, unsigned short l)
b[1] = (l >> 8) & 0xff;
}
static void
u32_to_b4_big_endian(unsigned char *b, unsigned long l)
{
b[0] = (l >> 24) & 0xff;
b[1] = (l >> 16) & 0xff;
b[2] = (l >> 8) & 0xff;
b[3] = l & 0xff;
}
static void
u16_to_b2_big_endian(unsigned char *b, unsigned short l)
{
b[0] = (l >> 8) & 0xff;
b[1] = l & 0xff;
}
static bool matches(const char *s, const char *pat)
{
return strncmp(s, pat, strlen(pat)) == 0;
@ -2491,7 +2507,7 @@ static int jtag3_send_tpi(const PROGRAMMER *pgm, unsigned char *data, size_t len
memcpy(cmdbuf + 1, data, len);
msg_trace("STK500V2: jtag3_send_tpi(");
for (size_t i=0; i<len+1; i++)
for (size_t i=1; i<=len; i++)
msg_trace("0x%02x ", cmdbuf[i]);
msg_trace(", %d)\n", (int) len);
@ -2511,14 +2527,15 @@ int jtag3_recv_tpi(const PROGRAMMER *pgm, unsigned char *resp) {
pmsg_error("unable to receive\n");
return -1;
}
rv = rv - 1;
memcpy(resp, tpimsg + 1, rv);
free(tpimsg);
msg_trace("STK500V2: jtag3_recv_tpi(");
for (size_t i=0; i<rv; i++)
msg_trace("0x%02x ", tpimsg[i]);
msg_trace("0x%02x ", resp[i]);
msg_trace(", %d)\n", (int) rv);
memcpy(resp, tpimsg + 1, rv - 1);
free(tpimsg);
return resp[1];
}
@ -2608,22 +2625,17 @@ static int jtag3_read_byte_tpi(const PROGRAMMER *pgm, const AVRPART *p, const AV
addr = 2;
} else if (strcmp(mem->desc, "lock") == 0) {
buf[1] = XPRG_MEM_TYPE_LOCKBITS;
paddr = 0x3F00 + addr;
paddr = mem->offset + addr;
} else if (strcmp(mem->desc, "calibration") == 0) {
buf[1] = XPRG_MEM_TYPE_LOCKBITS;
paddr = 0x3F80 + addr;
paddr = mem->offset + addr;
} else if (strcmp(mem->desc, "signature") == 0) {
buf[1] = XPRG_MEM_TYPE_LOCKBITS;
paddr = 0x3FC0 + addr;
paddr = mem->offset + addr;
}
buf[2] = (paddr>>24) & 0xFF;
buf[3] = (paddr>>16) & 0xFF;
buf[4] = (paddr>>8) & 0xFF;
buf[5] = paddr & 0xFF;
buf[6] = 0; // Length MSB
buf[7] = 1; // Length LSB, 1 since we are reading only one byte
u32_to_b4_big_endian((buf+2), paddr); // Address
u16_to_b2_big_endian((buf+6), 1); // Size
if (jtag3_send_tpi(pgm, buf, len) < 0)
return -1;