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Add DAB ANTCAP calibration and fix BT1035 boot banner timing

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Extend the FM-only ANTCAP antenna-varactor override to DAB, mirroring the
existing mechanism end to end (driver, tuner, service, EEPROM storage,
HTTP API). Live sweep on real hardware found no ANTCAP value beating
auto-tune on the ensembles tested, so DAB stays on auto-tune by default.

Also fix BT1035 boot: the module's real boot banner doesn't appear until
~18-24s after RESET# releases, not the 3.5s previously waited; add a
2-attempt retry and a baud-rate probe fallback for diagnostics.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
michele
2026-08-21 08:12:08 +02:00
co-authored by Claude Sonnet 5
parent 9ad2e42fe2
commit 3a58d33aad
38 changed files with 1444 additions and 115 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Software/components/drivers/bt1035/src/Bt1035Driver.cpp
+118 -19
View File
@@ -38,6 +38,23 @@ constexpr int kUartTxBuffer = 256;
constexpr int kResponseTimeoutMs = 2000;
constexpr int kPostResetMs = 500;
constexpr int kPostUartMs = 100;
/** Feasycom BT1035 programming user guide §2.2 (pin 34 SYS_CTRL): "Delay
* 100ms, pull high". */
constexpr int kSysCtlLeadInMs = 100;
/** Margin beyond the datasheet's own >20ms SYS_CTRL-assertion-to-power-up
* minimum (§4.7), for regulator/crystal settling before RESET releases. */
constexpr int kSysCtlSettleMs = 50;
/** Measured live (2026-08-20, power/wiring confirmed sound with a
* multimeter — VBAT_IN/SYS_CTRL/1.8V_OUT/VDD_IO all correct, TX/RX pins
* verified via continuity): the module's spontaneous boot banner
* (+VER=FSC-BT1035,..., +DEVSTAT=1) doesn't appear until ~18.5s after
* RESET# releases — full BT stack init, not just the internal regulator.
* The previous 3500ms wait here was never enough for the module to say
* anything, so every prior boot attempt cut power and restarted before
* the module could finish booting even once. See kBootAttempts below. */
constexpr int kBootBannerWaitMs = 25000;
constexpr int kBootAttempts = 2;
constexpr int kBootRetryDelayMs = 300;
void flushUartRx(int uartPort) noexcept
{
@@ -49,15 +66,53 @@ void flushUartRx(int uartPort) noexcept
}
}
// Diagnostic only: some BT1035 firmware prints an unsolicited boot banner on
// UART right after the hardware RESET# pulse. Capturing it (or its absence)
// tells us whether the UART link is electrically alive independent of the
// AT command layer.
// Diagnostic only, run once if all kBootAttempts fail at 115200 (the
// datasheet's own default). AT+BAUD persists across RESET#/SYS_CTRL power
// cycles (programming guide §5.1.3), so a stray manual AT+BAUD or
// AT+RESTORE sent during earlier interactive testing could have left the
// module listening at a different rate than our fixed assumption — this
// sweep tells us if that's what's happening instead of guessing.
constexpr std::array<int, 8> kBaudProbeCandidates = {
9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600};
void probeBaudRates(int uartPort) noexcept
{
ESP_LOGW(kTag, "115200 unresponsive after %d attempts — sweeping baud rates",
kBootAttempts);
for (const int baud : kBaudProbeCandidates) {
if (uart_set_baudrate(static_cast<uart_port_t>(uartPort), baud)
!= ESP_OK) {
continue;
}
flushUartRx(uartPort);
uart_write_bytes(static_cast<uart_port_t>(uartPort), "AT\r\n", 4);
std::array<char, 64> buf{};
const int n = uart_read_bytes(static_cast<uart_port_t>(uartPort),
buf.data(), buf.size(),
pdMS_TO_TICKS(500));
if (n > 0) {
ESP_LOGW(kTag, "baud probe: module responded at %d baud (%d bytes)",
baud, n);
ESP_LOG_BUFFER_HEX(kTag, buf.data(), static_cast<std::size_t>(n));
} else {
ESP_LOGI(kTag, "baud probe: silent at %d baud", baud);
}
}
uart_set_baudrate(static_cast<uart_port_t>(uartPort), kBaudRate);
flushUartRx(uartPort);
}
// The BT1035 prints an unsolicited boot banner (+VER=..., +DEVSTAT=1, ...)
// once its full Bluetooth stack finishes initialising — this blocks for up
// to kBootBannerWaitMs waiting for it, since that's the real boot-complete
// signal (the module is otherwise silent and won't answer AT commands
// until this appears).
void logRawUartBoot(int uartPort) noexcept
{
std::array<std::uint8_t, 128> buf{};
const int n = uart_read_bytes(static_cast<uart_port_t>(uartPort), buf.data(),
buf.size(), pdMS_TO_TICKS(3500));
buf.size(), pdMS_TO_TICKS(kBootBannerWaitMs));
if (n <= 0) {
ESP_LOGW("Bt1035", "no spontaneous UART bytes after hardware reset");
return;
@@ -904,32 +959,68 @@ std::expected<void, Bt1035Error> Bt1035Driver::runInitSequence()
return {};
}
std::expected<void, Bt1035Error> Bt1035Driver::resetAndInitOnce()
{
// Feasycom BT1035 programming user guide §2.2, pin 34 SYS_CTRL:
// "Delay 100ms, pull high" — the datasheet's own OFF-state timing spec
// (§4.7) says SYS_CTRL must be asserted >20ms before the internal
// regulators start powering up at all, so pulling it high with no
// lead-in delay (the previous sequence here) races the chip's own
// power-on requirement. Held low with RESET already asserted, then a
// 100ms lead-in exactly matching the guide, then SYS_CTRL high, then
// extra settle time before releasing RESET into a chip that's had a
// chance to actually power up first.
const auto sysCtlPin = static_cast<gpio_num_t>(pins_.sysCtlGpio);
const auto resetPin = static_cast<gpio_num_t>(pins_.resetGpio);
gpio_set_level(sysCtlPin, 0);
gpio_set_level(resetPin, 0);
vTaskDelay(pdMS_TO_TICKS(kSysCtlLeadInMs));
ESP_LOGI(kTag, "pre-power: SYS_CTRL=%d RESET=%d (want 0,0)",
gpio_get_level(sysCtlPin), gpio_get_level(resetPin));
gpio_set_level(sysCtlPin, 1);
vTaskDelay(pdMS_TO_TICKS(kSysCtlSettleMs));
ESP_LOGI(kTag, "post-syscl: SYS_CTRL=%d RESET=%d (want 1,0)",
gpio_get_level(sysCtlPin), gpio_get_level(resetPin));
gpio_set_level(resetPin, 1);
vTaskDelay(pdMS_TO_TICKS(kPostResetMs));
ESP_LOGI(kTag, "post-reset: SYS_CTRL=%d RESET=%d (want 1,1)",
gpio_get_level(sysCtlPin), gpio_get_level(resetPin));
logRawUartBoot(uartPort_);
uart_flush_input(static_cast<uart_port_t>(uartPort_));
vTaskDelay(pdMS_TO_TICKS(kPostUartMs));
return runInitSequence();
}
std::expected<void, Bt1035Error> Bt1035Driver::boot()
{
if (booted_) {
return {};
}
// GPIO_MODE_INPUT_OUTPUT (not plain GPIO_MODE_OUTPUT): gpio_config()
// only enables the pad's input buffer when the INPUT bit is set, so a
// pure-output config leaves gpio_get_level() reading a stale/always-0
// register instead of the real driven level — needed for the readback
// diagnostic below to be meaningful.
gpio_config_t resetCfg = {};
resetCfg.pin_bit_mask = 1ULL << pins_.resetGpio;
resetCfg.mode = GPIO_MODE_OUTPUT;
resetCfg.mode = GPIO_MODE_INPUT_OUTPUT;
if (gpio_config(&resetCfg) != ESP_OK) {
return std::unexpected(Bt1035Error::ResetFailed);
}
gpio_config_t sysCfg = {};
sysCfg.pin_bit_mask = 1ULL << pins_.sysCtlGpio;
sysCfg.mode = GPIO_MODE_OUTPUT;
sysCfg.mode = GPIO_MODE_INPUT_OUTPUT;
if (gpio_config(&sysCfg) != ESP_OK) {
return std::unexpected(Bt1035Error::ResetFailed);
}
gpio_set_level(static_cast<gpio_num_t>(pins_.sysCtlGpio), 1);
gpio_set_level(static_cast<gpio_num_t>(pins_.resetGpio), 0);
vTaskDelay(pdMS_TO_TICKS(100));
gpio_set_level(static_cast<gpio_num_t>(pins_.resetGpio), 1);
vTaskDelay(pdMS_TO_TICKS(kPostResetMs));
if (!uartInstalled_) {
const uart_config_t uartCfg = {
.baud_rate = kBaudRate,
@@ -961,12 +1052,20 @@ std::expected<void, Bt1035Error> Bt1035Driver::boot()
uartInstalled_ = true;
}
logRawUartBoot(uartPort_);
uart_flush_input(static_cast<uart_port_t>(uartPort_));
vTaskDelay(pdMS_TO_TICKS(kPostUartMs));
if (auto init = runInitSequence(); !init) {
ESP_LOGE(kTag, "AT init failed");
std::expected<void, Bt1035Error> init = std::unexpected(Bt1035Error::UnexpectedResponse);
for (int attempt = 1; attempt <= kBootAttempts; ++attempt) {
init = resetAndInitOnce();
if (init) {
break;
}
ESP_LOGW(kTag, "boot attempt %d/%d failed", attempt, kBootAttempts);
if (attempt < kBootAttempts) {
vTaskDelay(pdMS_TO_TICKS(kBootRetryDelayMs));
}
}
if (!init) {
ESP_LOGE(kTag, "AT init failed after %d attempts", kBootAttempts);
probeBaudRates(uartPort_);
return init;
}