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ftdi_transfer: add reset command

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This commit is contained in:
Zack Buhman 2025-08-26 19:57:29 -05:00
parent b54b635e61
commit 77f7869e91
1 changed files with 44 additions and 42 deletions
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86
tools/ftdi_transfer.cpp
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@ -88,48 +88,6 @@ int init_ftdi_context(struct ftdi_context * ftdi, uint32_t scbrr)
} }
ftdi_list_free(&devlist); ftdi_list_free(&devlist);
if (0) {
for (int i = 0; i < 2; i++) {
timespec t = {.tv_sec = 0, .tv_nsec = 33000 * 2 };
// toggle ACBUS5 low (g reset asserted)
uint8_t bitmask1 = (0b0001 << 4) | (0b0001 << 0);
res = ftdi_set_bitmode(ftdi, bitmask1, BITMODE_CBUS);
if (res < 0) {
fprintf(stderr, "ftdi_set_bitmode: %s\n", ftdi_get_error_string(ftdi));
return -1;
}
printf("cbus1\n");
nanosleep(&t, NULL);
// toggle ACBUS5 low (g reset deasserted)
uint8_t bitmask2 = (0b0000 << 4) | (0b0001 << 0);
res = ftdi_set_bitmode(ftdi, bitmask2, BITMODE_CBUS);
if (res < 0) {
fprintf(stderr, "ftdi_set_bitmode: %s\n", ftdi_get_error_string(ftdi));
return -1;
}
printf("cbus2\n");
nanosleep(&t, NULL);
}
uint8_t bitmask2 = (0b0000 << 4) | (0b0000 << 0);
res = ftdi_set_bitmode(ftdi, bitmask2, BITMODE_CBUS);
if (res < 0) {
fprintf(stderr, "ftdi_set_bitmode: %s\n", ftdi_get_error_string(ftdi));
return -1;
}
sleep(2);
printf("cbus3\n");
ftdi_disable_bitbang(ftdi);
//while (1);
//return 0;
}
res = ftdi_set_baudrate(ftdi, round(dreamcast_rate(current_cks, scbrr))); res = ftdi_set_baudrate(ftdi, round(dreamcast_rate(current_cks, scbrr)));
if (res < 0) { if (res < 0) {
fprintf(stderr, "ftdi_set_baudrate: %s\n", ftdi_get_error_string(ftdi)); fprintf(stderr, "ftdi_set_baudrate: %s\n", ftdi_get_error_string(ftdi));
@ -431,6 +389,49 @@ int do_list_baudrates(struct ftdi_context * ftdi)
return 0; return 0;
} }
int do_reset(struct ftdi_context * ftdi)
{
int res;
for (int i = 0; i < 2; i++) {
timespec t = {.tv_sec = 0, .tv_nsec = 33000 * 2 };
// toggle ACBUS5 low (g reset asserted)
uint8_t bitmask1 = (0b0001 << 4) | (0b0001 << 0);
res = ftdi_set_bitmode(ftdi, bitmask1, BITMODE_CBUS);
if (res < 0) {
fprintf(stderr, "ftdi_set_bitmode: %s\n", ftdi_get_error_string(ftdi));
return -1;
}
printf("cbus1\n");
nanosleep(&t, NULL);
// toggle ACBUS5 low (g reset deasserted)
uint8_t bitmask2 = (0b0000 << 4) | (0b0001 << 0);
res = ftdi_set_bitmode(ftdi, bitmask2, BITMODE_CBUS);
if (res < 0) {
fprintf(stderr, "ftdi_set_bitmode: %s\n", ftdi_get_error_string(ftdi));
return -1;
}
printf("cbus2\n");
nanosleep(&t, NULL);
}
uint8_t bitmask2 = (0b0000 << 4) | (0b0000 << 0);
res = ftdi_set_bitmode(ftdi, bitmask2, BITMODE_CBUS);
if (res < 0) {
fprintf(stderr, "ftdi_set_bitmode: %s\n", ftdi_get_error_string(ftdi));
return -1;
}
printf("cbus3\n");
ftdi_disable_bitbang(ftdi);
return 0;
}
int read_file(const char * filename, uint8_t ** buf, uint32_t * size_out) int read_file(const char * filename, uint8_t ** buf, uint32_t * size_out)
{ {
FILE * file = fopen(filename, "rb"); FILE * file = fopen(filename, "rb");
@ -752,6 +753,7 @@ const struct cli_command commands[] = {
{ "list_baudrates" , 0, (void *)&do_list_baudrates , false, NULL}, { "list_baudrates" , 0, (void *)&do_list_baudrates , false, NULL},
{ "show_baudrate_error", 0, (void *)&do_show_baudrate_error , true, NULL}, { "show_baudrate_error", 0, (void *)&do_show_baudrate_error , true, NULL},
{ "help" , 0, (void *)&do_help , false, NULL}, { "help" , 0, (void *)&do_help , false, NULL},
{ "reset" , 0, (void *)&do_reset , true, NULL},
}; };
constexpr int commands_length = (sizeof (commands)) / (sizeof (commands[0])); constexpr int commands_length = (sizeof (commands)) / (sizeof (commands[0]));