f800a7e303
Bug fixes and new examples Co-authored-by: Paulo Marques <pm@quant-insight.com> Co-authored-by: martin <admin@crossleys.biz> Co-authored-by: matiasilva <matias.silva@raspberrypi.com> Co-authored-by: Uri Shaked <uri@urishaked.com> Co-authored-by: Diego Solano <diegosolano@gmail.com> Co-authored-by: Andrew Scheller <andrew.scheller@raspberrypi.com> Co-authored-by: Adrian Hesketh <a-h@users.noreply.github.com> Co-authored-by: Emircan Gündoğdu <58917386+emircangun@users.noreply.github.com> Co-authored-by: Josef Wegner <80200012+josefwegner@users.noreply.github.com> Co-authored-by: pmarques-dev <72901351+pmarques-dev@users.noreply.github.com> Co-authored-by: Paulo Marques <pm@quant-insight.com> Co-authored-by: mjcross <mjcross@users.noreply.github.com> Co-authored-by: martin <admin@crossleys.biz>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/**
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* Copyright (c) 2021 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "hardware/gpio.h"
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#include "hardware/adc.h"
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#include "hardware/uart.h"
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#include "pico/binary_info.h"
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/* Example code to extract analog values from a microphone using the ADC
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with accompanying Python file to plot these values
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Connections on Raspberry Pi Pico board, other boards may vary.
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GPIO 26/ADC0 (pin 31)-> AOUT or AUD on microphone board
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3.3v (pin 36) -> VCC on microphone board
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GND (pin 38) -> GND on microphone board
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*/
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#define ADC_NUM 0
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#define ADC_PIN (26 + ADC_NUM)
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#define ADC_VREF 3.3
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#define ADC_RANGE (1 << 12)
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#define ADC_CONVERT (ADC_VREF / (ADC_RANGE - 1))
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int main() {
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stdio_init_all();
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printf("Beep boop, listening...\n");
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bi_decl(bi_program_description("Analog microphone example for Raspberry Pi Pico")); // for picotool
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bi_decl(bi_1pin_with_name(ADC_PIN, "ADC input pin"));
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adc_init();
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adc_gpio_init( ADC_PIN);
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adc_select_input( ADC_NUM);
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uint adc_raw;
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while (1) {
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adc_raw = adc_read(); // raw voltage from ADC
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printf("%.2f\n", adc_raw * ADC_CONVERT);
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sleep_ms(10);
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}
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return 0;
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}
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