rgb-led-string: single-direction white stars

projects/rgb-led-string/Makefile

 
 PROGRAM=rgbstring
-SRC=version.c main.c logging.c
+SRC=version.c main.c logging.c serial.c
 OBJ=$(SRC:.c=.o)
 
 
@@ -8,7 +8,7 @@ MCU=attiny45
 AVRDUDE_MCU=$(MCU)
 AVRDUDE_PROGRAMMER=usbasp
 
-CFLAGS=-Wall -Os -mmcu=$(MCU) -DUSE_LOGGING=1 -DF_CPU=1000000UL -std=gnu99
+CFLAGS=-Wall -Os -mmcu=$(MCU) -DUSE_LOGGING=1 -DF_CPU=8000000UL -std=gnu99
 LDFLAGS=
 AVRDUDE_FLAGS= -p$(AVRDUDE_MCU) -c $(AVRDUDE_PROGRAMMER)
 

projects/rgb-led-string/main.c

@@ -4,17 +4,86 @@
 
 #include "rgbstring.h"
 
+unsigned char jiffies;
+
+typedef struct {
+	unsigned char type : 4;
+	unsigned char order : 4;
+} pixel_t;
+
+pixel_t pixels[STRIP_SIZE];
+
+
 int main(void)
 {
+	unsigned char i, start, rgb, jiffies;
 	init_log();
+	init_serial();
+
+	_delay_ms(3000/8);
+	CLKPR = _BV(CLKPCE);
+	CLKPR = 0;
 
-	log_set_state(3);
+	for (i = 0; i < STRIP_SIZE; i+= 23)
+		pixels[i].type = 2;
 
-	DDRB |= _BV(PB2);
 	while (1) {
-		PORTB |=  _BV( PB2 );
-		_delay_ms(200);
-		PORTB &=~ _BV( PB2 );
-		_delay_ms(200);
+		jiffies++;
+		if ((jiffies & 7) == 0) {
+			pixels[start].type = 1;
+			pixels[start].order = 14;
+		}
+
+		if ((jiffies & 7) == 3) {
+			pixels[start].type = 2;
+			pixels[start].order = 0;
+			start += 19;
+		}
+
+		start += 63;
+		if (start >= STRIP_SIZE)
+			start -= STRIP_SIZE;
+
+		for (i = 0; i < STRIP_SIZE; i++) {
+			unsigned char type = pixels[i].type;
+			unsigned char order = pixels[i].order;
+
+			switch (type) {
+			case 0:
+				send_rgb(0, 0, 4);
+				break;
+			case 1:
+			case 3:
+				send_rgb(
+					6+(1 << (order/2)),
+					6+(1 << (order/2)),
+					6+(1 << (order/2))
+				);
+				pixels[i].type = type == 3 ? 2 : 0;;
+				if (order > 1 && i) {
+					pixels[i-1].type = pixels[i-1].type == 2 ? 3 : 1;
+					pixels[i-1].order = order-1;
+				}
+				break;
+			case 2:
+				if (order >= 8) {
+					send_rgb(1 << ((15-order) / 2), 0, 0);
+				} else {
+					send_rgb(1 << (order/2), 0, 0);
+				}
+				if (++order >= 15)
+					pixels[i].type = 0;
+				pixels[i].order = order;
+				break;
+			}
+		}
+
+		end_frame();
+
+		_delay_ms(50);
+#if 0
+		log_byte(0xFa);
+		log_flush();
+#endif
 	}
 }

projects/rgb-led-string/rgbstring.h

@@ -18,70 +18,12 @@ void inline log_byte(unsigned char byte) { }
 void inline log_word(uint16_t word) { }
 #endif
 
-/* adc.c */
-#define PWMLED_ADC_SHIFT 1 /* 1<<1 measurements per single callback */
-extern volatile unsigned char need_battery_adc;
-extern volatile unsigned char need_pwmled_adc;
-extern volatile unsigned char adc_enabled;
-void init_adc();
-void susp_adc();
-void start_next_adc();
-
-/* pwm.c */
-#define PWM_MAX 0xFF
-extern volatile unsigned char pwm_enabled;
-void init_pwm();
-void susp_pwm();
-void pwm_off();
-void pwm_set(uint8_t stride);
-
-/* pwmled.c */
-void init_pwmled();
-void pwmled_adc(uint16_t adcval);
-void pwmled_set_target(unsigned char mode);
-void pwmled_on_off(unsigned char on);
-
-/* pattern.c */
-void init_pattern();
-void patterns_next_tick();
-void led_set_pattern(unsigned char led, unsigned char bits_len,
-	unsigned char bits_start, unsigned char *data);
-void led_set_number_pattern(unsigned char led,
-	unsigned char num, unsigned char inv);
-void pattern_reload();
-
-/* buttons.c */
-void init_buttons();
-void susp_buttons();
-void timer_check_buttons();
-unsigned char buttons_wait_for_release();
-void status_led_on_off(unsigned char on);
-
-/* battery.c */
-void battery_adc();
-void init_battery();
-unsigned char battery_gauge();
-
-/* control.c */
-void init_control();
-void long_press_start();
-void long_press();
-void short_press();
-void brake_on();
-void brake_off();
-void pwmled_pattern_select(unsigned char led);
-void status_led_pattern_select(unsigned char led);
-#define ERR_BATTERY 1
-#define ERR_PWMLED  2
-void set_error(unsigned char err);
-
-/* wdt.c */
-extern volatile uint16_t jiffies;
-void init_wdt();
-void susp_wdt();
-
-/* main.c */
-void power_down();
+/* serial.c */
+#define STRIP_SIZE 160
+void init_serial();
+void zero_frame();
+void end_frame();
+void send_rgb(unsigned char r, unsigned char g, unsigned char b);
 
 #endif /* !LIGHTS_H__ */
 

projects/rgb-led-string/serial.c

+#include <avr/io.h>
+#include <util/delay.h>
+#include <avr/interrupt.h>
+
+#include "rgbstring.h"
+
+void init_serial()
+{
+	PORTB &= ~(_BV(PB2) | _BV(PB1));
+	DDRB |= _BV(PB2) | _BV(PB1);
+
+#if 0
+	TCCR0A = _BV(WGM01) | _BV(WGM00);
+	TCCR0B = _BV(WGM02) | _BV(CS00);
+	OCR0A = 2;
+#endif
+
+	zero_frame();
+}
+
+static void send_byte(unsigned char b)
+{
+	unsigned char i, mask;
+
+#if 0
+	USIDR = b;
+	USISR = _BV(USIOIF);
+	USICR = _BV(USIWM0) | _BV(USICS0);
+
+	while (!(USISR & _BV(USIOIF)))
+		;
+#endif
+
+#if 1
+	USIDR = b;
+	USISR = _BV(USIOIF);
+
+	while ( (USISR & _BV(USIOIF)) == 0 ) {
+		USICR = _BV(USIWM0) | _BV(USICS1) | _BV(USICLK);
+		USICR = _BV(USIWM0) | _BV(USICS1) | _BV(USICLK) | _BV(USITC);
+	}
+#endif
+
+#if 0
+	for (i = 0; i < 8; i++) {
+		USICR = _BV(USIWM0) | _BV(USITC);
+		USICR = _BV(USIWM0) | _BV(USITC) | _BV(USICLK);
+	}
+#endif
+
+#if 0
+	for (i = 0; i < 8; i++) {
+		PORTB &= ~_BV(PB2);		// clock low
+		if (b & 0x80)			// data bit on or off
+			PORTB |= _BV(PB1);
+		else
+			PORTB &= ~_BV(PB1);
+		b <<= 1;
+		PORTB |= _BV(PB2);		// clock high
+	}
+#endif
+}
+
+void end_frame()
+{
+	PORTB &= ~_BV(PB2);			// clock low
+	_delay_us(1000);
+}
+
+void send_rgb(unsigned char r, unsigned char g, unsigned char b)
+{
+	send_byte(r);
+	send_byte(g);
+	send_byte(b);
+}
+
+
+void zero_frame()
+{
+	unsigned char i;
+
+	for (i = 0; i < STRIP_SIZE; i++) {
+		send_rgb(0, 0, 0);
+	}
+
+	end_frame();
+}
+