mirror of https://github.com/ArduPilot/ardupilot
44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
// -*- Mode: C++; c-basic-offset: 8; indent-tabs-mode: nil -*-
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//
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// Example code for the AP_HAL_FLYMAPLE AnalogIn
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//
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// This code is placed into the public domain.
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//
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#include <AP_Common/AP_Common.h>
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#include <AP_Math/AP_Math.h>
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#include <AP_Param/AP_Param.h>
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#include <AP_HAL/AP_HAL.h>
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#include <AP_HAL_FLYMAPLE/AP_HAL_FLYMAPLE.h>
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const AP_HAL::HAL& hal = AP_HAL::get_HAL();
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// Expects pin 15 to be connected to board VCC 3.3V
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static AP_HAL::AnalogSource *vcc_pin; // GPIO pin 15
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static AP_HAL::AnalogSource *batt_pin; // GPIO pin 20
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void setup(void)
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{
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hal.console->println("AnalogIn test starts");
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vcc_pin = hal.analogin->channel(ANALOG_INPUT_BOARD_VCC);
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batt_pin = hal.analogin->channel(20);
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}
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void loop(void)
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{
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float vcc = vcc_pin->voltage_average();
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float batt = batt_pin->voltage_average();
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// Flymaple board pin 20 is connected to the external battery supply
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// via a 24k/5.1k voltage divider. The schematic claims the divider is 25k/5k,
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// but the actual installed resistors are not so.
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batt *= 5.70588; // (24000+5100)/5100
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hal.console->printf("Vcc pin 15: %f\n", vcc);
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hal.console->printf("VIN (via pin 20): %f\n", batt);
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hal.scheduler->delay(1000);
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}
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AP_HAL_MAIN();
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