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mini-jtag: remove globle buf, use independent out buffer

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This commit is contained in:
Xiangfu 2012-09-25 22:19:21 +08:00
parent df613b4e80
commit aeddee61ff
1 changed files with 16 additions and 14 deletions
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30
mini-jtag/mini-jtag.c
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@ -66,8 +66,7 @@ static void usage(char *name)
int main(int argc, char **argv)
{
struct ftdi_context ftdi;
uint8_t buf[65536];
uint8_t buf[4];
uint8_t conf_buf[] = {SET_BITS_LOW, 0x08, 0x0b,
SET_BITS_HIGH, 0x00, 0x00,
TCK_DIVISOR, 0x00, 0x00,
@ -111,17 +110,18 @@ int main(int argc, char **argv)
"Can't send command to device\n");
return 1;
}
ftdi_read_data(&ftdi, &buf[3], 1);
if (!(buf[3] & 0x10)) {
ftdi_read_data(&ftdi, &buf[2], 1);
if (!(buf[2] & 0x10)) {
fprintf(stderr,
"Vref not detected. Please power on target board\n");
return 1;
}
if (!strcmp(argv[1], "idcode")) {
uint8_t out[4];
tap_reset_rti(&ftdi);
tap_shift_dr_bits(&ftdi, NULL, 32, buf);
rev_dump(buf, 4);
tap_shift_dr_bits(&ftdi, NULL, 32, out);
rev_dump(out, 4);
printf("\n");
}
@ -212,6 +212,7 @@ int main(int argc, char **argv)
}
if (!strcmp(argv[1], "readreg") && argc == 3) {
uint8_t out[2];
uint8_t in[14] = {
0xaa, 0x99, 0x55, 0x66,
0x00, 0x00, 0x20, 0x00,
@ -229,11 +230,11 @@ int main(int argc, char **argv)
tap_shift_ir(&ftdi, CFG_IN);
tap_shift_dr_bits(&ftdi, in, 14 * 8, NULL);
tap_shift_ir(&ftdi, CFG_OUT);
tap_shift_dr_bits(&ftdi, NULL, 2 * 8, buf);
tap_shift_dr_bits(&ftdi, NULL, 2 * 8, out);
printf("Read: ");
rev_dump(buf, 2);
printf("\t[%d]\n",(uint32_t) (buf[1] << 8 | buf[0]));
rev_dump(out, 2);
printf("\t[%d]\n",(uint32_t) (out[1] << 8 | out[0]));
tap_reset_rti(&ftdi);
}
@ -246,6 +247,7 @@ int main(int argc, char **argv)
if (!strcmp (argv[1], "read") && argc == 3) {
uint8_t addr, checksum;
uint8_t in[5];
uint8_t out[4];
tap_reset_rti(&ftdi);
tap_shift_ir(&ftdi, USER1);
@ -261,11 +263,11 @@ int main(int argc, char **argv)
tap_shift_dr_bits(&ftdi, in, 6, NULL);
/* Now read back the register */
tap_shift_dr_bits(&ftdi, NULL, 32, buf);
tap_shift_dr_bits(&ftdi, NULL, 32, out);
printf("Read: ");
rev_dump(buf, 4);
printf("\t[%d]\n",(uint32_t) (buf[3] << 24 | buf[2] << 16 |
buf[1] << 8 | buf[0]));
rev_dump(out, 4);
printf("\t[%d]\n",(uint32_t) (out[3] << 24 | out[2] << 16 |
out[1] << 8 | out[0]));
tap_reset_rti(&ftdi);
}
@ -295,7 +297,7 @@ int main(int argc, char **argv)
rev_dump(in, 5);
printf("\n");
tap_shift_dr_bits(&ftdi, in, 38, buf);
tap_shift_dr_bits(&ftdi, in, 38, NULL);
tap_reset_rti(&ftdi);
}