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/*
* Copyright © 2008 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "ccdbg.h"
static uint8_t
get_bit(char *line, int i, char on, uint8_t bit)
{
if (line[i] == on)
return bit;
if (line[i] == '.')
return 0;
fprintf(stderr, "bad line %s\n", line);
exit (1);
}
static char
is_bit(uint8_t get, char on, uint8_t bit)
{
if (get&bit)
return on;
else
return '.';
}
static uint8_t
ccdbg_write_read(struct ccdbg *dbg, uint8_t set)
{
uint8_t get;
cccp_write(dbg, CC_DATA|CC_CLOCK|CC_RESET_N, set);
get = cccp_read_all(dbg);
printf("%c %c %c -> %c %c %c\n",
is_bit(set, 'C', CC_CLOCK),
is_bit(set, 'D', CC_DATA),
is_bit(set, 'R', CC_RESET_N),
is_bit(get, 'C', CC_CLOCK),
is_bit(get, 'D', CC_DATA),
is_bit(get, 'R', CC_RESET_N));
ccdbg_half_clock(dbg);
return get;
}
static void
_ccdbg_debug_mode(struct ccdbg *dbg)
{
ccdbg_write_read(dbg, CC_CLOCK|CC_DATA|CC_RESET_N);
ccdbg_write_read(dbg, CC_DATA );
ccdbg_write_read(dbg, CC_CLOCK|CC_DATA );
ccdbg_write_read(dbg, CC_DATA );
ccdbg_write_read(dbg, CC_CLOCK|CC_DATA );
ccdbg_write_read(dbg, CC_DATA|CC_RESET_N);
}
static void
_ccdbg_reset(struct ccdbg *dbg)
{
ccdbg_write_read(dbg, CC_CLOCK|CC_DATA|CC_RESET_N);
ccdbg_write_read(dbg, CC_CLOCK|CC_DATA );
ccdbg_write_read(dbg, CC_CLOCK|CC_DATA );
ccdbg_write_read(dbg, CC_CLOCK|CC_DATA|CC_RESET_N);
}
static void
ccdbg_manual(struct ccdbg *dbg, FILE *input)
{
char line[80];
uint8_t set;
while (fgets(line, sizeof line, input)) {
if (line[0] == '#' || line[0] == '\n') {
printf ("%s", line);
continue;
}
set = 0;
set |= get_bit(line, 0, 'C', CC_CLOCK);
set |= get_bit(line, 2, 'D', CC_DATA);
set |= get_bit(line, 4, 'R', CC_RESET_N);
ccdbg_write_read(dbg, set);
}
}
int
main (int argc, char **argv)
{
struct ccdbg *dbg;
uint8_t status;
uint16_t chip_id;
dbg = ccdbg_open("/dev/ttyUSB0");
if (!dbg)
exit (1);
ccdbg_manual(dbg, stdin);
#if 0
ccdbg_debug_mode(dbg);
status = ccdbg_read_status(dbg);
printf("Status: 0x%02x\n", status);
chip_id = ccdbg_get_chip_id(dbg);
printf("Chip id: 0x%04x\n", chip_id);
#endif
_ccdbg_reset(dbg);
ccdbg_close(dbg);
exit (0);
}
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