kopia lustrzana https://github.com/AlexFWulff/awulff-pico-playground
Added lots of comments
rodzic
a70c90628c
commit
64501dac6c
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@ -12,7 +12,16 @@
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// ############ ADC and Model Stuff ############
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// NSAMP is the number of samples collected between each run of the
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// machine learning code. An NSAMP of 1000 at a 4 kHz sample rate
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// means the model will run once every quarter second. As each new
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// batch of NSAMP samples are collected, the last INSIZE-NSAMP samples
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// collected from the previous run are wrapped around to the beginning
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// of the sample buffer, and the next NSAMP samples are added on
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#define NSAMP 1000
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// INSIZE is the input size of the model. In most cases, this should
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// be one second's worth of data, so it should be equal to the sample
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// rate of the ADC.
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#define INSIZE 4000
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// set this to determine sample rate
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@ -21,13 +30,19 @@
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// 9600 = 5,000 Hz
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#define CLOCK_DIV 12000
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// ADC channel
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#define CAPTURE_CHANNEL 0
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// Pin for light strip
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#define LED_PIN 25
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// cooldown time for activating start
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#define COOLDOWN_US 1000000
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float features[INSIZE];
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uint16_t capture_buf[NSAMP];
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uint16_t intermediate_buf[INSIZE];
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uint64_t last_on_time = 0;
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// ############ Functions ############
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int raw_feature_get_data(size_t offset, size_t length, float *out_ptr) {
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@ -40,18 +55,17 @@ int main()
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stdio_usb_init();
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stdio_init_all();
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// function lives in lights.cpp
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// Launch lighting core - function lives in lights.cpp
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multicore_launch_core1(core1_entry);
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gpio_init(LED_PIN);
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gpio_set_dir(LED_PIN, GPIO_OUT);
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// configure Edge Impulse things
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ei_impulse_result_t result = {nullptr};
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signal_t features_signal;
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features_signal.total_length = INSIZE;
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features_signal.get_data = &raw_feature_get_data;
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if (INSIZE != EI_CLASSIFIER_DSP_INPUT_FRAME_SIZE) {
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while (1) {
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printf("Input frame size incorrect!\n");
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@ -60,7 +74,6 @@ int main()
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}
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adc_gpio_init(26 + CAPTURE_CHANNEL);
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adc_init();
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adc_select_input(CAPTURE_CHANNEL);
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adc_fifo_setup(
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@ -87,8 +100,6 @@ int main()
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// Pace transfers based on availability of ADC samples
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channel_config_set_dreq(&cfg, DREQ_ADC);
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uint64_t last_on_time = 0;
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while (true) {
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adc_fifo_drain();
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adc_run(false);
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@ -132,21 +143,22 @@ int main()
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const float thresh = 0.6;
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uint32_t state = 0;
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uint32_t model_result = 0;
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for (size_t ix = 0; ix < EI_CLASSIFIER_LABEL_COUNT; ix++) {
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// activate only if it's above the threshold and cooldown is over
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if (ix == 2 && result.classification[ix].value > thresh &&
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time_us_64()-last_on_time>COOLDOWN_US) {
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printf("START\n");
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last_on_time = time_us_64();
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// Set the state to 1 for the keyword you use to turn the lights
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// on and change the lighting state
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state = 1;
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// Set the result to 1 for the keyword you use to turn the
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// lights on and or change the lighting state
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model_result = 1;
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}
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if (ix == 3 && result.classification[ix].value > thresh) {
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printf("STOP\n");
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// Set the state to 2 for the keyword that turns off the lights
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state = 2;
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// Set the result to 2 for the keyword that turns off the lights
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model_result = 2;
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}
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printf("%0.2f, ",result.classification[ix].value);
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@ -156,14 +168,23 @@ int main()
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// If the lighting core wants a state update, and there's a state
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// update to give, then we'll send it over.
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if (multicore_fifo_rvalid() && state != 0) {
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if (multicore_fifo_rvalid() && model_result != 0) {
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multicore_fifo_pop_blocking();
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multicore_fifo_push_blocking(state);
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multicore_fifo_push_blocking(model_result);
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}
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// Signal processing done. Now wait for audio sampling to finish...
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// You should see the LED flashing during the sampling period. If
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// it is not flashing, the inferencing is taking too long and there
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// is data loss between inferencing windows. See the tutorial for
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// this project for more information.
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gpio_put(LED_PIN, 0);
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dma_channel_wait_for_finish_blocking(dma_chan);
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// We want to be really quick here, otherwise we'll lose lots of
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// audio between when we stopped sampling and when we start the next
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// sampling window. Just doing some very fast moves (no conversions)
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// wrap newest samples to beginning
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for (uint32_t i=0; i<INSIZE-NSAMP; i++) {
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intermediate_buf[i] = intermediate_buf[i+NSAMP];
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