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/*
* USB CDC multiplexer: KISS binary (0xC0 frames) + ASCII service commands.
* Transparent Host↔Chip bit bridge stays abandoned — KISS half-TNC is the exception.
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include "usb_cmd.h"
#include "pico/stdlib.h"
#include "ptt.h"
#include "status.h"
#include "config.h"
#include "sense.h"
#include "board_pins.h"
#include "afsk_bitbang.h"
#include "kiss.h"
#include "hardware/gpio.h"
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#define LINE_MAX 96
static char g_line[LINE_MAX];
static unsigned g_len;
static kiss_rx_t g_kiss;
static uint8_t g_kiss_payload[KISS_MAX_PAYLOAD];
static void trim_copy_upper_cmd(char *dst, size_t dstsz, const char *src)
{
while (*src && isspace((unsigned char)*src)) {
src++;
}
size_t i = 0;
while (src[i] && i + 1 < dstsz) {
dst[i] = (char)toupper((unsigned char)src[i]);
i++;
}
dst[i] = '\0';
while (i > 0 && isspace((unsigned char)dst[i - 1])) {
dst[--i] = '\0';
}
}
static void handle_line(void)
{
char cmd[LINE_MAX];
trim_copy_upper_cmd(cmd, sizeof(cmd), g_line);
if (cmd[0] == '\0') {
return;
}
if (strcmp(cmd, "PTT ON") == 0 || strcmp(cmd, "PTT 1") == 0) {
ptt_set(true);
status_tick();
printf("OK PTT ON\r\n");
return;
}
if (strcmp(cmd, "PTT OFF") == 0 || strcmp(cmd, "PTT 0") == 0) {
ptt_set(false);
status_tick();
printf("OK PTT OFF\r\n");
return;
}
if (strcmp(cmd, "STATUS") == 0) {
printf("STATUS state=%s ptt=%d signal=%d packet=%d flag=%d "
"cdt_raw=%d rxd_raw=%d bitrate=%u kiss_half_tnc=1\r\n",
c1224_state_string(status_get()),
(int)ptt_get(),
(int)sense_signal_active(),
(int)sense_packet_active(),
(int)sense_packet_flag(),
(int)gpio_get(PIN_MODEM_CDT),
(int)gpio_get(PIN_MODEM_RXD),
afsk_bitrate());
return;
}
if (strcmp(cmd, "HELP") == 0) {
printf("Commands:\r\n");
printf(" PTT ON | PTT OFF\r\n");
printf(" STATUS | HELP | ID\r\n");
printf(" QUIET ON|OFF | VERBOSE ON|OFF\r\n");
printf(" INI | GET <key> | SET <key>=<value>\r\n");
printf(" SAVE | RELOAD | DEFAULTS\r\n");
printf("Dual protocol: byte 0xC0 → KISS; line ASCII → service.\r\n");
printf("Packet: use KISS-only (any host). Service cmds optional.\r\n");
printf("Boot banner always on (source). quiet=1 damps extra ASCII.\r\n");
printf("PTT = GP9 (auto during KISS TX; manual PTT ON/OFF kept).\r\n");
printf("Rate = stuffed crystal (FW bitbang C1224_BITRATE=%u).\r\n",
afsk_bitrate());
printf("No softmodem · no Host↔Chip bit bridge · no baud switch.\r\n");
printf("INI: texts + callsign device_id quiet + sense keys\r\n");
return;
}
if (strcmp(cmd, "ID") == 0) {
const c1224_config_t *cfg = config_get();
printf("ID device_id=%s callsign=%s bitrate=%u quiet=%d\r\n",
cfg->device_id[0] ? cfg->device_id : "c1224",
cfg->callsign,
afsk_bitrate(),
(int)cfg->quiet);
return;
}
if (strcmp(cmd, "QUIET ON") == 0 || strcmp(cmd, "QUIET 1") == 0) {
config_mutable()->quiet = true;
printf("OK QUIET ON\r\n");
return;
}
if (strcmp(cmd, "QUIET OFF") == 0 || strcmp(cmd, "QUIET 0") == 0) {
config_mutable()->quiet = false;
printf("OK QUIET OFF\r\n");
return;
}
if (strcmp(cmd, "VERBOSE ON") == 0 || strcmp(cmd, "VERBOSE 1") == 0) {
config_mutable()->quiet = false;
printf("OK VERBOSE ON\r\n");
return;
}
if (strcmp(cmd, "VERBOSE OFF") == 0 || strcmp(cmd, "VERBOSE 0") == 0) {
config_mutable()->quiet = true;
printf("OK VERBOSE OFF\r\n");
return;
}
if (strcmp(cmd, "INI") == 0) {
config_dump_ini();
return;
}
if (strcmp(cmd, "SAVE") == 0) {
printf(config_save_flash() ? "OK SAVE\r\n" : "ERR SAVE\r\n");
return;
}
if (strcmp(cmd, "RELOAD") == 0) {
config_load_defaults();
if (config_load_flash()) {
printf("OK RELOAD flash\r\n");
} else {
printf("OK RELOAD defaults (no flash)\r\n");
}
status_publish();
return;
}
if (strcmp(cmd, "DEFAULTS") == 0) {
config_load_defaults();
printf("OK DEFAULTS (RAM; SAVE to persist)\r\n");
status_publish();
return;
}
if (strncmp(cmd, "GET ", 4) == 0) {
char key[32];
const char *p = g_line;
while (*p && isspace((unsigned char)*p)) {
p++;
}
if (strncasecmp(p, "GET", 3) == 0) {
p += 3;
}
while (*p && isspace((unsigned char)*p)) {
p++;
}
size_t i = 0;
while (*p && !isspace((unsigned char)*p) && i + 1 < sizeof(key)) {
key[i++] = *p++;
}
key[i] = '\0';
char val[C1224_TEXT_MAX];
if (config_get_kv(key, val, sizeof(val))) {
printf("OK %s=%s\r\n", key, val);
} else {
printf("ERR unknown key\r\n");
}
return;
}
if (strncmp(cmd, "SET ", 4) == 0) {
const char *p = g_line;
while (*p && isspace((unsigned char)*p)) {
p++;
}
if (strncasecmp(p, "SET", 3) == 0) {
p += 3;
}
while (*p && isspace((unsigned char)*p)) {
p++;
}
char tmp[LINE_MAX];
snprintf(tmp, sizeof(tmp), "%s", p);
char *eq = strchr(tmp, '=');
if (!eq) {
printf("ERR SET key=value\r\n");
return;
}
*eq = '\0';
char *k = tmp;
char *v = eq + 1;
while (*k && isspace((unsigned char)*k)) {
k++;
}
char *ke = k + strlen(k);
while (ke > k && isspace((unsigned char)ke[-1])) {
*--ke = '\0';
}
while (*v && isspace((unsigned char)*v)) {
v++;
}
char *ve = v + strlen(v);
while (ve > v && isspace((unsigned char)ve[-1])) {
*--ve = '\0';
}
if (config_set_kv(k, v)) {
printf("OK SET %s=%s (SAVE to persist)\r\n", k, v);
status_publish();
} else {
printf("ERR unknown key or bad value\r\n");
}
return;
}
printf("ERR unknown (try HELP)\r\n");
}
void usb_cmd_on_rx_frame(const uint8_t *info, size_t len)
{
uint8_t frame[KISS_MAX_PAYLOAD + 16];
size_t n = kiss_encode_data(info, len, frame, sizeof(frame));
for (size_t i = 0; i < n; i++) {
putchar_raw((int)frame[i]);
}
}
void usb_cmd_poll(void)
{
int c;
while ((c = getchar_timeout_us(0)) != PICO_ERROR_TIMEOUT) {
uint8_t b = (uint8_t)c;
/* KISS path: FEND or mid-frame */
if (b == KISS_FEND || g_kiss.in_frame) {
size_t plen = 0;
if (kiss_rx_byte(&g_kiss, b, g_kiss_payload, &plen)) {
if (plen > 0 && !afsk_tx_busy()) {
afsk_tx_frame(g_kiss_payload, plen);
}
}
continue;
}
if (c == '\r' || c == '\n') {
if (g_len > 0) {
g_line[g_len] = '\0';
handle_line();
g_len = 0;
}
continue;
}
if (c == 0x08 || c == 0x7f) {
if (g_len > 0) {
g_len--;
}
continue;
}
if (g_len + 1 < LINE_MAX && c >= 32 && c < 127) {
g_line[g_len++] = (char)c;
}
}
}
void usb_cmd_init(void)
{
g_len = 0;
kiss_rx_init(&g_kiss);
}
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