Created
October 24, 2018 23:09
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/* | |
Based on https://github.com/maltesemanTS1/Charlieplexing-the-Arduino | |
http://arduino.cc/en/Tutorial/BitMask | |
*/ | |
int16_t shifter = 0; | |
uint8_t shifter_factor = 8; // also speed influence | |
bool toggle = true; | |
const uint8_t max_leds = 20; | |
uint8_t pwm_value; | |
uint8_t pwm_values[20] = { 0,0,0,0,0, 0,0,0,0,0, 0,0,0,0,0, 23,15,8,1,1 }; | |
void setup() | |
{ | |
} | |
void loop() { | |
buffer_write(); | |
} | |
void buffer_write() | |
{ | |
for (uint8_t p = 0; p < 24; p++) | |
{ | |
for (int8_t i = 0; i < max_leds; i++) | |
{ | |
int16_t led_index = i + shifter/shifter_factor; | |
if (led_index > max_leds || led_index < 0) | |
{ | |
pwm_value = 0; | |
} | |
else | |
{ | |
pwm_value = pwm_values[led_index]; | |
} | |
if (p < pwm_value) | |
{ | |
if (toggle) charlie(i); | |
else charlie(max_leds - i -1); // -1 to get to zero | |
} | |
else | |
{ | |
charlie(-1); | |
} | |
} | |
} | |
shifter++; | |
if (shifter == shifter_factor * max_leds) | |
{ | |
toggle = !toggle; | |
shifter = -(shifter_factor * 5); | |
if (toggle) delay(2000); | |
} | |
} | |
void charlie_combo(uint8_t a, uint8_t b) | |
{ | |
// output | |
DDRB |= (1 << a); | |
// output | |
DDRB |= (1 << b); | |
// high | |
PORTB |= (1<<a); | |
// low | |
PORTB &= ~(1<<b); | |
} | |
void charlie (uint8_t var) | |
{ | |
// DDRB |= (0x1F); | |
DDRB &= ~(0x1F); | |
PORTB &= ~(0x1F); | |
switch (var) { | |
case 0: charlie_combo(0, 1); break; | |
case 1: charlie_combo(1, 0); break; | |
case 2: charlie_combo(0, 2); break; | |
case 3: charlie_combo(2, 0); break; | |
case 4: charlie_combo(0, 3); break; | |
case 5: charlie_combo(3, 0); break; | |
case 6: charlie_combo(0, 4); break; | |
case 7: charlie_combo(4, 0); break; | |
case 8: charlie_combo(1, 2); break; | |
case 9: charlie_combo(2, 1); break; | |
case 10: charlie_combo(1, 3); break; | |
case 11: charlie_combo(3, 1); break; | |
case 12: charlie_combo(1, 4); break; | |
case 13: charlie_combo(4, 1); break; | |
case 14: charlie_combo(2, 3); break; | |
case 15: charlie_combo(3, 2); break; | |
case 16: charlie_combo(2, 4); break; | |
case 17: charlie_combo(4, 2); break; | |
case 18: charlie_combo(3, 4); break; | |
case 19: charlie_combo(4, 3); break; | |
default: ; | |
} | |
} |
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