diff --git a/board.h b/board.h index 9576dba..98fa567 100644 --- a/board.h +++ b/board.h @@ -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. diff --git a/main.cpp b/main.cpp index f7c8027..c3abd77 100644 --- a/main.cpp +++ b/main.cpp @@ -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 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(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); }