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fix(wio-tracker-l2): USB power detection works - charge bolt, Power row, GPS hint

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- The AW35615 USB-C controller (FUSB302-style registers, ID 0x91) only
  reports VBUSOK with its measure block on; POWER resets to bandgap only,
  so isExternalPowered() was always false. Board init turns it on
- Status bar shows a charge bolt on the cable, Diagnostics > Live has a
  Power row, the GPS screen notes that charging disturbs GPS, and the
  low-battery warning is skipped on USB as intended
- Roadmap: USB detection closed; GPS indoors still worse than the L1
  even on battery, left open for later

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-09-26 22:12:05 +02:00
co-authored by Claude Opus 5.5
parent 70921cd865
commit f849ee0b00
6 changed files with 45 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
variants/wio-tracker-l2/WioTrackerL2Board.cpp
+25 -6
View File
@@ -125,6 +125,20 @@ void WioTrackerL2Board::begin() {
Wire.beginTransmission(0x22);
aw_ok = Wire.endTransmission() == 0;
if (aw_ok) {
// AW35615 = FUSB302-style register map. VBUSOK (STATUS0 bit 7) only
// works with the measure block powered: POWER (0x0B) resets to 0x01
// (bandgap only), which reads "no USB" forever. Add the receiver /
// current references and the measure block (PWR[1..2]).
// Verified on hardware: device ID 0x91; STATUS0 0x01 -> 0x80 on USB.
int pw = awRead(0x0B);
if (pw >= 0) {
Wire.beginTransmission(0x22);
Wire.write((uint8_t)0x0B);
Wire.write((uint8_t)(pw | 0x07));
Wire.endTransmission();
}
}
MESH_DEBUG_PRINTLN("WioTrackerL2Board: init done");
esp_reset_reason_t reason = esp_reset_reason();
@@ -156,13 +170,18 @@ int WioTrackerL2Board::expReadInputs() {
return lo | (hi << 8);
}
bool WioTrackerL2Board::isExternalPowered() {
if (!aw_ok) return false;
int WioTrackerL2Board::awRead(uint8_t reg) {
if (!aw_ok) return -1;
Wire.beginTransmission(0x22);
Wire.write((uint8_t)0x40); // STATUS0
if (Wire.endTransmission() != 0) return false;
if (Wire.requestFrom(0x22, 1) != 1) return false;
return (Wire.read() & 0x80) != 0; // VBUSOK bit
Wire.write(reg);
if (Wire.endTransmission() != 0) return -1;
if (Wire.requestFrom(0x22, 1) != 1) return -1;
return Wire.read();
}
bool WioTrackerL2Board::isExternalPowered() {
int st0 = awRead(0x40); // STATUS0
return st0 >= 0 && (st0 & 0x80) != 0; // VBUSOK
}
bool WioTrackerL2Board::readWakeButton() {
variants/wio-tracker-l2/WioTrackerL2Board.h
+1
View File
@@ -84,6 +84,7 @@ public:
// VBUS presence via the AW35615 USB-C controller (I2C 0x22)
bool isExternalPowered() override;
int awRead(uint8_t reg); // AW35615 register, -1 on error
bool expanderOK() const { return expander_ok; }