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pcb firmware working

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pull/1/head
Clyne 3 months ago
parent b4360fbf44
commit 686e00c921
Signed by: clyne
GPG Key ID: 3267C8EBF3F9AFC7
2 changed files with 69 additions and 30 deletions
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11
board.h
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@ -59,6 +59,17 @@
#define LINE_USART2_TX PAL_LINE(GPIOA, 14U)
#define LINE_LED0 PAL_LINE(GPIOB, 7U)
#define LINE_LED1 PAL_LINE(GPIOC, 14U)
#define LINE_LED2 PAL_LINE(GPIOC, 15U)
#define LINE_LED3 PAL_LINE(GPIOA, 0U)
#define LINE_LED4 PAL_LINE(GPIOA, 1U)
#define LINE_LED5 PAL_LINE(GPIOA, 2U)
#define LINE_LED6 PAL_LINE(GPIOA, 3U)
#define LINE_LED7 PAL_LINE(GPIOA, 6U)
#define LINE_LED8 PAL_LINE(GPIOB, 0U)
#define LINE_LED9 PAL_LINE(GPIOB, 3U)
/*
* I/O ports initial setup, this configuration is established soon after reset
* in the initialization code.

88
main.cpp
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@ -34,7 +34,7 @@ static constexpr auto MIC_BITS = 18u;
static constexpr auto SAMPLE_RATE = 48000u;
static constexpr unsigned I2S_BUFSIZ = 1024;
static constexpr unsigned I2S_STRIDE = 32:
static constexpr unsigned I2S_STRIDE = 32;
// Calculate reference amplitude value at compile time
static const auto MIC_REF_AMPL = sos_t((1 << (MIC_BITS - 1)) - 1) *
@ -45,6 +45,7 @@ static std::array<uint32_t, I2S_BUFSIZ> i2sBuffer;
static sos_t Leq_sum_sqr (0.f);
static unsigned Leq_samples = 0;
static void blinkDb(int db);
static void i2sCallback(I2SDriver *i2s);
static constexpr unsigned I2SPRval = 16'000'000 / SAMPLE_RATE / 32 / 2;
@ -64,49 +65,78 @@ int main(void)
{
halInit();
osalSysEnable();
//osalThreadSleepMilliseconds(2000);
palSetPadMode(GPIOB, 7, PAL_MODE_OUTPUT_PUSHPULL);
palSetPad(GPIOB, 7);
//palSetPadMode(GPIOF, 2, PAL_MODE_UNCONNECTED);
palSetLineMode(LINE_LED0, PAL_MODE_OUTPUT_PUSHPULL); palSetLine(LINE_LED0);
palSetLineMode(LINE_LED1, PAL_MODE_OUTPUT_PUSHPULL); palSetLine(LINE_LED1);
palSetLineMode(LINE_LED2, PAL_MODE_OUTPUT_PUSHPULL); palSetLine(LINE_LED2);
palSetLineMode(LINE_LED3, PAL_MODE_OUTPUT_PUSHPULL); palSetLine(LINE_LED3);
palSetLineMode(LINE_LED4, PAL_MODE_OUTPUT_PUSHPULL); palSetLine(LINE_LED4);
palSetLineMode(LINE_LED5, PAL_MODE_OUTPUT_PUSHPULL); palSetLine(LINE_LED5);
palSetLineMode(LINE_LED6, PAL_MODE_OUTPUT_PUSHPULL); palSetLine(LINE_LED6);
palSetLineMode(LINE_LED7, PAL_MODE_OUTPUT_PUSHPULL); palSetLine(LINE_LED7);
palSetLineMode(LINE_LED8, PAL_MODE_OUTPUT_PUSHPULL); palSetLine(LINE_LED8);
palSetLineMode(LINE_LED9, PAL_MODE_OUTPUT_PUSHPULL); palSetLine(LINE_LED9);
palSetLineMode(LINE_I2S_SD, PAL_MODE_ALTERNATE(0));
palSetLineMode(LINE_I2S_WS, PAL_MODE_ALTERNATE(0));
palSetLineMode(LINE_I2S_CK, PAL_MODE_ALTERNATE(0));
//palSetLineMode(LINE_USART2_TX, PAL_MODE_ALTERNATE(1));
//sdStart(&SD2, NULL);
//sdWrite(&SD2, (uint8_t *)"Noisemeter\n", 11);
//osalThreadSleepMilliseconds(2);
i2sReady.store(true);
i2sStart(&I2SD1, &i2sConfig);
i2sStartExchange(&I2SD1);
// Microphone warmup time
osalThreadSleepMilliseconds(140);
// Reach filter delay steady state
i2sReady.store(false);
osalThreadSleepMilliseconds(120);
// Discard initial readings
Leq_sum_sqr = 0.f;
Leq_samples = 0;
uint8_t strbuf[7] = { 0, 0, 0, 'd', 'B', '\n', '\0' };
for (;;) {
i2sReady.store(false);
SCB->SCR |= SCB_SCR_SLEEPONEXIT_Msk;
__WFI();
//palSetPad(GPIOB, 7);
const sos_t Leq_RMS = qfp_fsqrt(Leq_sum_sqr / qfp_uint2float(Leq_samples));
const auto sum_sqr = std::exchange(Leq_sum_sqr, sos_t(0.f));
const auto count = std::exchange(Leq_samples, 0);
const sos_t Leq_RMS = qfp_fsqrt(sum_sqr / qfp_uint2float(count));
const sos_t Leq_dB = MIC_OFFSET_DB + MIC_REF_DB + sos_t(20.f) *
qfp_flog10(Leq_RMS / MIC_REF_AMPL);
Leq_sum_sqr = sos_t(0.f);
Leq_samples = 0;
auto n = std::clamp(qfp_float2int(Leq_dB), 0, 999);
palClearPad(GPIOB, 7);
osalThreadSleepMicroseconds(200);
palSetPad(GPIOB, 7);
//strbuf[2] = n % 10 + '0'; n /= 10;
//strbuf[1] = n % 10 + '0'; n /= 10;
//strbuf[0] = n ? n + '0' : ' ';
//sdWrite(&SD2, strbuf, sizeof(strbuf));
//osalThreadSleepMilliseconds(2);
////palClearPad(GPIOB, 7);
const auto n = std::clamp(qfp_float2int(Leq_dB), 0, 999);
blinkDb(n);
}
}
void blinkDb(int db)
{
auto line = LINE_LED0;
if (db < 45)
line = LINE_LED0;
else if (db < 55)
line = LINE_LED1;
else if (db < 65)
line = LINE_LED2;
else if (db < 75)
line = LINE_LED3;
else if (db < 82)
line = LINE_LED4;
else if (db < 87)
line = LINE_LED5;
else if (db < 92)
line = LINE_LED6;
else if (db < 97)
line = LINE_LED7;
else if (db < 102)
line = LINE_LED8;
else
line = LINE_LED9;
palClearLine(line);
osalThreadSleepMilliseconds(50);
palSetLine(line);
}
__attribute__((section(".data")))
int32_t fixsample(uint32_t s) {
return (int32_t)(((s & 0xFFFF) << 16) | (s >> 16)) >> (32 - MIC_BITS);
@ -118,7 +148,6 @@ void i2sCallback(I2SDriver *i2s)
if (i2sReady.load())
return;
//palSetPad(GPIOB, 7);
const auto halfsize = i2sBuffer.size() / 2;
const auto source = i2sBuffer.data() + (i2sIsBufferComplete(i2s) ? halfsize : 0);
auto samples = reinterpret_cast<sos_t *>(source);
@ -134,11 +163,10 @@ void i2sCallback(I2SDriver *i2s)
Leq_sum_sqr += WEIGHTING.filter_sum_sqr(samps);
Leq_samples += samps.size();
// Wakeup main thread for dB calculation every second
if (Leq_samples >= SAMPLE_RATE / I2S_STRIDE) {
// Wakeup main thread for dB calculation every half second
if (Leq_samples >= SAMPLE_RATE / I2S_STRIDE / 2) {
i2sReady.store(true);
SCB->SCR &= ~SCB_SCR_SLEEPONEXIT_Msk;
}
//palClearPad(GPIOB, 7);
}

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