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Use better ADC resolution, make it faster, allow quick toggling of serial output.

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Daniel H 2023-07-07 12:02:00 +02:00 • committed by GitHub
parent 0da62b2433
commit 1ad0f7db3d
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 23 additions and 13 deletions
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pico-am.ino
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@ -1,8 +1,9 @@
// You will need to install RP2040_PWM in the Arduino IDE first!
// RP2040_PWM is incompatible with Arduino Mbed OS RP2040 at >v4. Use 3.x!
#define F_CPU 204000000
//#define ENABLE_SERIAL
#include "RP2040_PWM.h"
@ -77,7 +78,10 @@ RP2040_PWM* pwm;
RP2040_PWM* led;
void setup() {
#ifdef ENABLE_SERIAL
Serial.begin(9600);
#endif
analogReadResolution(12);
set_sys_clock_khz(204000, true);
pwm = new RP2040_PWM(15, 1557000, 0);
pwm->enablePWM();
@ -93,24 +97,30 @@ void setup() {
PWM_Level = 65535;
// setPWM_manual(uint8_t pin, uint16_t top, uint8_t div, uint16_t level, bool phaseCorrect = false)
led->setPWM_manual(LED_BUILTIN, PWM_TOP, PWM_DIV, PWM_Level, false);
delay(200);
Serial.println(pwm->get_freq_CPU());
Serial.println(pwm->getActualFreq());
delay(200);
}
//long n = 0;
//float m = 0;
long t = millis();
long n = 0;
float m = 0;
void loop() {
float v = ((float) analogRead(26) / 4096.0 * 6 * 100.0 + 10);
float v = ((float) analogRead(26) / 4096.0 * 200.0 + 10);
pwm->setPWM_DCPercentage_manual(15, v);
led->setPWM_DCPercentage_manual(LED_BUILTIN, v);
//n = n + 1;
//if(m < v) { m = v; }
//if(n % 100000 == 0) {
//Serial.print(n);
//Serial.println(": ");
//Serial.println(m);
//m = 0;
//}
#ifdef ENABLE_SERIAL
n = n + 1;
if(m < v) { m = v; }
if(n % 100000 == 0) {
Serial.print((float) n / (((float)(millis() - t)) / 1000) / 1000);
Serial.print("kHz (max=");
Serial.print(m);
Serial.println(")");
t = millis();
n = 0;
m = 0;
}
#endif
}