mirror of
https://github.com/digistump/DigistumpArduino.git
synced 2025-04-28 15:49:02 -07:00
76 lines
3.1 KiB
C++
76 lines
3.1 KiB
C++
#include <TinySoftPwm.h>
|
|
|
|
/*
|
|
_____ ____ __ _ ____ _ _ _ _
|
|
| __ \ / __ \ | \ | | / __ \ | | | | | | | |
|
|
| |__| | | / \_| | . \ | | / / \ \ | | | | \ \ / /
|
|
| _ / | | _ | |\ \| | | |__| | | | | | \ ' /
|
|
| | \ \ | \__/ | | | \ ' | | __ | \ \/ / | |
|
|
|_| \_\ \____/ |_| \__| |_| |_| \__/ |_| 2015
|
|
|
|
http://p.loussouarn.free.fr
|
|
|
|
****************************************
|
|
* <TinySoftPwm> library Demo *
|
|
****************************************
|
|
|
|
This sketch generates simultaneously PWM signals on 13 pins (Pin 0 to pin 12 of the Digispark pro).
|
|
It also increases the luminosity of the built-in LED of the Digispark whilst the duty cycle remains constant for all other pins.
|
|
When the luminosity reaches its maximum, the luminosity decreases.
|
|
When the luminosity reaches its minimum, the luminosity increases, and so on...
|
|
|
|
Note:
|
|
====
|
|
Declare the Pin(s) used in "librarie/TinySoftPwm/TinySoftPwm.h"
|
|
In this sketch, #define TINY_SOFT_PWM_USES_PINO to TINY_SOFT_PWM_USES_PIN12 must be enabled (not commented) since it uses the first 13 pins of the DigiSpark pro.
|
|
|
|
In this basic example, TinySoftPwm_process() is called periodically using micros(), but it is recommanded to call it from a timer ISR
|
|
to ensure a better periodicity.
|
|
|
|
*/
|
|
|
|
#define BUILT_IN_LED_PIN 1 /* Digispark Model A (Rev2) built-in LED pin number (Change it to 2 for Model B) */
|
|
|
|
void setup()
|
|
{
|
|
TinySoftPwm_begin(255, 0); /* 255 x TinySoftPwm_process() calls before overlap (Frequency tuning), 0 = PWM init for all declared pins */
|
|
for(uint8_t PinIdx = 0; PinIdx <= 12; PinIdx++)
|
|
{
|
|
TinySoftPwm_analogWrite(PinIdx, (PinIdx + 1) * 19); /* Low to high duty cycle for pin 0 to 12 */
|
|
}
|
|
}
|
|
|
|
void loop()
|
|
{
|
|
static uint32_t StartUs = micros();
|
|
static uint32_t StartMs = millis();
|
|
static uint8_t Pwm = 0;
|
|
static int8_t Dir = 1;
|
|
|
|
/***********************************************************/
|
|
/* Call TinySoftPwm_process() with a period of 40 us */
|
|
/* The PWM frequency = 255 x 40 # 10.2 ms -> F # 100Hz */
|
|
/* 255 is the first argument passed to TinySoftPwm_begin() */
|
|
/***********************************************************/
|
|
if((micros() - StartUs) >= 40)
|
|
{
|
|
/* We arrived here every 40 microseconds */
|
|
StartUs = micros();
|
|
TinySoftPwm_process(); /* This function shall be called periodically (like here, based on micros(), or in a timer ISR) */
|
|
}
|
|
|
|
/*************************************************************/
|
|
/* Increment/decrement PWM on LED Pin with a period of 10 ms */
|
|
/*************************************************************/
|
|
if((millis() - StartMs) >= 10)
|
|
{
|
|
/* We arrived here every 10 milliseconds */
|
|
StartMs = millis();
|
|
Pwm += Dir; /* increment or decrement PWM depending of sign of Dir */
|
|
TinySoftPwm_analogWrite(BUILT_IN_LED_PIN, Pwm); /* Update built-in LED for Digispark */
|
|
if(Pwm == 255) Dir = -1; /* if PWM reaches the maximum: change direction */
|
|
if(Pwm == 0) Dir = +1; /* if PWM reaches the minimum: change direction */
|
|
}
|
|
}
|
|
|