porklib: Simple library for programming Arduino in C
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avr-lib/examples/sipo_pwm_74HC4094/main.c

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#include <stdint.h>
#include "lib/iopins.h"
#include "lib/sipo_pwm.h"
#include "sipo_pwm_config.h"
// Example with 3 chained 74HC4094
// Pins configured in sipo_pwm_config.h
const uint8_t rainbow[] = {
128, 161, 192, 218, 238, 251, 255, 251,
238, 218, 191, 161, 128, 95, 64, 38, 18,
5, 1, 5, 18, 38, 65, 95
};
void main()
{
// Initialize SIPO PWM module (74HC4094)
spwm_init();
// Tnitialize the array with default values
for (uint8_t i = 0; i < SPWM_CHANNELS; i++) {
spwm_levels[i] = rainbow[i];
}
// Animation
while(1)
{
// SHOW THE PWM
spwm_send();
// Make a change - effect
uint8_t first = spwm_levels[0];
for (uint8_t bit = 0; bit < SPWM_CHANNELS - 1; bit++)
{
spwm_levels[bit] = spwm_levels[bit + 1];
}
spwm_levels[SPWM_CHANNELS - 1] = first;
}
}