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M2 step 3: GNSS Service, with standby and the clock from a Fix

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The GNSS Service reads the receiver (UART 15/13, 115200, 1 KB buffer)
from its 50 ms tick and feeds the NMEA parser. With a Fix it sets the
clock (GNSS is the most trusted TimeSource) and refreshes it every 10
min. Settings gets GNSS On/Off and the coordinate format (Q64).

Off puts the receiver in standby with $PCAS12,65535, renewed hourly; On
wakes it with a hot start, $PCAS10,0. Both measured on the device: the
output stops within a second, and a command wakes it within a second.

Commands: gnss status (Fix, satellites per constellation, bytes and
sentences), gnss nmea on|off, gnss send <sentence>, gnss restart. The
probe is gone; never drive GPIO 15 (the receiver's output): the first
probe's swapped-pin attempt silenced it until a power cycle.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT
This commit is contained in:
twisla
2026-10-04 22:26:53 +02:00
co-authored by Claude Opus 5.5
parent c9b1ecb772
commit 988253ef02
13 changed files with 257 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/main.cpp
+10 -28
View File
@@ -2,7 +2,6 @@
#include <M5Cardputer.h>
#include <SD.h>
#include <esp_task_wdt.h>
#include <atomic>
#include <memory>
@@ -27,6 +26,7 @@
#include "services/irc_service.h"
#include "services/clock_service.h"
#include "services/debug_console.h"
#include "services/gnss_service.h"
#include "services/power_service.h"
#include "services/storage_service.h"
#include "services/update_service.h"
@@ -52,6 +52,7 @@ static BatteryService* battery;
static StorageService* storageService;
static PowerService* power;
static ClockService* clockService;
static GnssService* gnssService;
static SavedNetworks* savedNetworks;
static WifiService* wifi;
static IrcService* irc;
@@ -131,6 +132,7 @@ void setup() {
storageService = new StorageService(bus);
power = new PowerService(settings);
clockService = new ClockService(settings, bus);
gnssService = new GnssService(settings, *clockService, bus);
savedNetworks = new SavedNetworks(nvs);
savedNetworks->load();
wifi = new WifiService(settings, *savedNetworks, *clockService);
@@ -141,6 +143,7 @@ void setup() {
services.add(*power);
services.add(*clockService);
services.add(*battery);
services.add(*gnssService);
services.add(*storageService);
services.add(*wifi);
services.add(*irc);
@@ -325,6 +328,7 @@ static const char* const kHelp =
"reboot restart\n"
"boot other restart into the other app slot (manual Rollback)\n"
"log level <0-5> ESP-IDF log level (0 none ... 5 verbose)\n"
"gnss status | gnss restart | gnss nmea on|off | gnss send <sentence without $ and checksum>\n"
"crash the last crash: firmware, reason, task, backtrace\n"
"coredump erase forget the core dump in flash\n"
"key <name|char> press a key: up down left right select back home del tab, or one character\n"
@@ -386,33 +390,11 @@ static void runCommand(String line) {
});
}
if (line.startsWith("install ")) update->installFromSd(line.substring(8).c_str()); // Update from SD
if (line == "gnss probe") { // M2 step 1: which pins and baud rate carry NMEA (temporary)
struct Try { int rx, tx; uint32_t baud; } tries[] = {{15, 13, 115200}, {13, 15, 115200}, {15, 13, 9600}, {13, 15, 9600}};
for (auto& t : tries) {
Serial1.begin(t.baud, SERIAL_8N1, t.rx, t.tx);
uint32_t start = millis(), bytes = 0, lines = 0;
std::string current, sample;
while (millis() - start < 1200) {
esp_task_wdt_reset(); // four listens outlast the 5 s loop watchdog
while (Serial1.available()) {
char c = Serial1.read();
bytes++;
if (c == '\n') {
if (current.size() > 6 && current[0] == '$') {
lines++;
if (sample.size() < 400) sample += " " + current + "\n";
}
current.clear();
} else if (c != '\r' && current.size() < 120) current += c;
}
delay(5);
}
Serial1.end();
console.printf("gnss probe: rx %d tx %d at %lu: %lu bytes, %lu NMEA lines\n", t.rx, t.tx,
(unsigned long)t.baud, (unsigned long)bytes, (unsigned long)lines);
if (lines) console.print(sample.c_str());
}
}
if (line == "gnss status" && gnssService) gnssService->printStatus(console, millis());
if ((line == "gnss nmea on" || line == "gnss nmea off") && gnssService) gnssService->setEcho(line.endsWith("on"));
if (line == "gnss restart" && gnssService) gnssService->restart(millis());
if (line.startsWith("gnss send ") && gnssService) // the checksum is added
console.println(gnssService->send(line.substring(10).c_str()) ? "gnss: sent" : "gnss: off");
if (line == "crash") crash_report::print(console, nvs);
if (line == "coredump erase") console.println(crash_report::erase() ? "coredump: erased" : "coredump: nothing to erase");
#ifdef RORO_DEBUG