qmsk-dmx: src/hello-dmx.c@2d68a76322cb (annotated)

62 2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	1	/*
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	2	* DMX output.
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	3	*
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	4	* See doc/dmx.txt for the RX-485 bus protocol details...
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	5	*/
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	6
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	7	#include <avr/io.h>
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	8	#include <util/delay.h>
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	9
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	10	#include "stdlib.h"
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	11
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	12	// debug
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	13	#define DEBUG_DDR DDRB
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	14	#define DEBUG_PORT PORTB
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	15	#define DEBUG_LED 0
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	16
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	17	void led_init ()
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	18	{
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	19	sbi(&DEBUG_DDR, DEBUG_LED);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	20	}
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	21
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	22	void led_on ()
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	23	{
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	24	sbi(&DEBUG_PORT, DEBUG_LED);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	25	}
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	26
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	27	void led_off ()
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	28	{
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	29	cbi(&DEBUG_PORT, DEBUG_LED);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	30	}
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	31
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	32	void led_toggle ()
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	33	{
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	34	xbi(&DEBUG_PORT, DEBUG_LED);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	35	}
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	36
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	37	// DMX
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	38	#define DMX_DDR DDRB
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	39	#define DMX_PORT PORTB
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	40	#define DMX_DATA 3 // SPI MOSI
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	41
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	42	// baud rate: 250k = 4µs / bit
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	43	#define DMX_BAUD (250 * 1000)
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	44	#define DMX_US 4
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	45
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	46	// CPU cycles / bit: 64 @ 16Mhz
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	47	#define DMX_CYCLES (F_CPU / DMX_BAUD)
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	48
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	49	void dmx_init ()
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	50	{
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	51	// dmx data out: idle (high)
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	52	sbi(&DMX_PORT, DMX_DATA);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	53	sbi(&DMX_DDR, DMX_DATA);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	54	}
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	55
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	56	static inline void dmx_high ()
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	57	{
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	58	sbi(&DMX_PORT, DMX_DATA);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	59	}
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	60
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	61	static inline void dmx_low ()
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	62	{
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	63	cbi(&DMX_PORT, DMX_DATA);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	64	}
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	65
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	66	#define dmx_pause(bits) _delay_us((DMX_US * bits))
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	67
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	68	static void dmx_break ()
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	69	{
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	70	// break
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	71	dmx_low();
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	72	dmx_pause(22);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	73
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	74	// mark-after-break (MAB)
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	75	dmx_high();
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	76	dmx_pause(2);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	77	}
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	78
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	79	#include "dmx_frame.c"
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	80
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	81	static void dmx_packet (byte r, byte g, byte b)
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	82	{
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	83	dmx_break();
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	84	dmx_frame(0);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	85
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	86	dmx_frame(0); // control
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	87	dmx_frame(r);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	88	dmx_frame(g);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	89	dmx_frame(b);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	90	dmx_frame(0); // madness
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	91	}
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	92
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	93	void main ()
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	94	{
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	95	led_init();
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	96	dmx_init();
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	97
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	98	// dmx
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	99	while (true) {
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	100	dmx_packet(0x00, 0x00, 0xff);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	101	dmx_pause(100);
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	102
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	103	led_toggle();
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	104	}
2d68a76322cb hello-dmx: working basic dmx output using DmxSimple's frame-timing inline assembler code Tero Marttila <terom@paivola.fi> parents: diff changeset	105	}

author	Tero Marttila <terom@paivola.fi>
	Sun, 06 Apr 2014 18:25:55 +0300
changeset 62	2d68a76322cb
child 65	625f34328820
permissions	-rw-r--r--