75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
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#include <cstdio>
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#include "pico/stdlib.h"
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#include "servo2040.hpp"
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#include "analogmux.hpp"
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#include "analog.hpp"
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#include "button.hpp"
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/*
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Show how to read the 6 external sensors and
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display their values on the neighbouring LEDs.
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Press "Boot" to exit the program.
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*/
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using namespace plasma;
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using namespace servo;
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// The brightness of the LEDs
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constexpr float BRIGHTNESS = 0.4f;
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// How many times to update LEDs and Servos per second
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const uint UPDATES = 50;
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// Set up the shared analog inputs
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Analog sen_adc = Analog(servo2040::SHARED_ADC);
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// Set up the analog multiplexer, including the pin for controlling pull-up/pull-down
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AnalogMux mux = AnalogMux(servo2040::ADC_ADDR_0, servo2040::ADC_ADDR_1, servo2040::ADC_ADDR_2,
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PIN_UNUSED, servo2040::SHARED_ADC);
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// Create the LED bar, using PIO 1 and State Machine 0
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WS2812 led_bar = WS2812(servo2040::NUM_LEDS, pio1, 0, servo2040::LED_DATA);
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// Create the user button
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Button user_sw(servo2040::USER_SW);
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int main() {
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stdio_init_all();
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// Set up the sensor addresses with pull downs
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for(auto i = 0u; i < servo2040::NUM_SENSORS; i++) {
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mux.configure_pulls(servo2040::SENSOR_1_ADDR + i, false, true);
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}
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// Start updating the LED bar
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led_bar.start();
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// Read sensors until the user button is pressed
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while(!user_sw.raw()) {
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// Read each sensor in turn and print its voltage
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for(auto i = 0u; i < servo2040::NUM_SENSORS; i++) {
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mux.select(servo2040::SENSOR_1_ADDR + i);
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float sensor_voltage = sen_adc.read_voltage();
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// Calculate the LED's hue, with Green for high voltages and Blue for low
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float hue = (2.0f - (sensor_voltage / 3.3f)) * 0.333f;
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led_bar.set_hsv(i, hue, 1.0f, BRIGHTNESS);
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printf("S%d = %f,", i + 1, sensor_voltage);
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}
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printf("\n");
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sleep_ms(1000 / UPDATES);
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}
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// Turn off the LED bar
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led_bar.clear();
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// Sleep a short time so the clear takes effect
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sleep_ms(100);
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}
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