mca-pendel/sketches/led-driver/led-driver.c
2018-03-23 00:03:12 +01:00

223 lines
4.5 KiB
C

#include <stdint.h>
#include <stddef.h>
#include <avr/io.h>
#define F_CPU 20000000UL
#include <util/delay.h>
#include <stdbool.h>
#define BAUD 9600
#include <util/setbaud.h>
#include "colors.notc"
/*
255 0 0
255 255 0
0 0 255
*/
/*
// f=20MHz -> T=0,05 µs
uint8_t T0H = 6; // == 0.3 µs ~ 0.4 µs (+- 150ns) == [0.25, 0.55] µs
uint8_t T1H = 14; // == 0.7 µs ~ 0.8 µs (+- 150ns) == [0.65, 0.95] µs
uint8_t T0L = 15; // == 0.75 µs ~ 0.85µs (+- 150ns) == [0.70, 1.00] µs
uint8_t T1L = 8; // == 0.35 µs ~ 0.45µs (+- 150ns) == [0.30, 0.60] µs
uint8_t RES = 51; // > 50 µs
*/
// #define VAR1
#ifdef VAR1
#define nop __asm__ ("nop")
#define wait6 __asm__ ("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop")
#define wait8 __asm__ ("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop")
#define wait14 __asm__ ("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop")
#define wait15 __asm__ ("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop")
#else
// https://github.com/cpldcpu/light_ws2812/blob/master/light_ws2812_AVR/Light_WS2812/light_ws2812.c
#define w_nop1 __asm__("nop \n\t")
#define w_nop2 __asm__("rjmp .+0 \n\t")
#define w_nop4 w_nop2; w_nop2
#define w_nop8 w_nop4; w_nop4
#define w_nop16 w_nop8; w_nop8
#define wait6 w_nop2; w_nop4
#define wait8 w_nop4; w_nop4
#define wait14 wait8; wait6
#define wait15 wait14; w_nop1
#endif
#define HUE_DEGREE 120
#define HUE_MAX 610
#define HUE_MIN 350
#define LEDS 30
#define DELAYS 536
void uart_init();
void writeZero();
void writeOne();
void writeRGB(uint8_t red, uint8_t green, uint8_t blue);
void writeNothing(uint8_t c);
void mydelay(uint16_t ms) {
while(ms--) {
_delay_loop_2(5000); // 1ms
}
}
int mainz()
{
DDRC = 1;
uint8_t d = 14;
while(1)
{
for(int i = 0; i < LEDS; i += 1)
writeRGB(85,0,0);
mydelay(DELAYS);
for(int i = 0; i < LEDS; i += 1)
writeRGB(0,0,85);
mydelay(DELAYS);
//~ for(int i = 0; i < LEDS; i += 1)
//~ writeRGB(0,128,0);
//~ mydelay(DELAYS);
}
return 0;
}
int main() {
DDRC = 1; // PORT C0 output
// uart_init();
uint16_t min = HUE_MIN, max = HUE_MAX;
uint8_t vl = 40;
uint16_t steps = 1;
bool falling = true;
hsv_t colorsHSV[LEDS];
rgb_t colorsRGB[LEDS];
do{
//~ if(left == 360){
//~ left = 180;
//~ right = 360;
//~ }else{
//~ left = 360;
//~ right = 180;
//~ }
interpolateLinearly(makeHSV(min, 100, 30), makeHSV(max, 100, 30), LEDS, colorsHSV);
hsv2rgbList(colorsHSV, colorsRGB, LEDS);
for( int i = 0; i < LEDS; i++){
writeRGB( colorsRGB[i].r, colorsRGB[i].g, colorsRGB[i].b);
}
// switch
if(falling){
min = min + steps;
max = max - steps;
} else {
min = min - steps;
max = max + steps;
}
if(min == HUE_MAX || max == HUE_MAX) {
falling = !falling;
}
// pulse
//~ if(falling){
//~ vl -= steps;
//~ // right = right - steps;
//~ } else {
//~ vl += steps;
//~ right = right + steps;
//~ }
//~ if(vl == 5 || vl == 40){
//~ falling = !falling;
//~ }
//_delay_us(100);
}while(true);
}
inline void writeZero() {
PORTC = 1;
wait6;
PORTC = 0;
wait15;
}
inline void writeOne() {
PORTC = 1;
wait14;
PORTC = 0;
wait8;
}
void writeRGB(uint8_t red, uint8_t green, uint8_t blue) {
int i;
for( i = 128; i > 0; i >>= 1 ) {
if( green & i ){
writeOne();
} else {
writeZero();
}
}
for( i = 128; i > 0; i >>= 1 ) {
if( red & i ){
writeOne();
} else {
writeZero();
}
}
for( i = 128; i > 0; i >>= 1 ) {
if( blue & i ){
writeOne();
} else {
writeZero();
}
}
}
void uart_init(void) {
#define BAUDRATE ((F_CPU)/(BAUD*8UL)-1) // set baud rate value for UBRR
UBRR0H = (BAUDRATE>>8); // shift the register right by 8 bits to get the upper 8 bits
UBRR0L = BAUDRATE & 0xff; // set baud rate
// UCSR0A |= (1 << U2X0); // double transmission speed
// UCSR0B = (1 << TXEN0) | (1 << RXEN0);
// UCSR0C = (1 << UCSZ01) | (1 << UCSZ00);
// UBRR0H = UBRRH_VALUE;
// UBRR0L = UBRRL_VALUE;
UCSR0A |= _BV(U2X0);
// UCSR0A &= ~(_BV(U2X0));
// UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); /* 8-bit data */
UCSR0C = 0x06; /* 8-bit data */
UCSR0B = _BV(RXEN0) | _BV(TXEN0) | _BV(RXCIE0); /* Enable RX and TX */
}
void writeNothing(uint8_t c){
for(uint8_t i = 0; i < c; i++){
writeRGB(0,0,0);
}
_delay_ms(500);
}