arduino: src/hello.c@975a2dffdcda (annotated)

47 7f930a94ee1e bravely step into the modern world of C-programming, using avr-gcc for a hello world... Tero Marttila <terom@paivola.fi> parents: diff changeset	1	#include <avr/io.h>
49 f01fb659e54d hello: timer-based sleeps Tero Marttila <terom@paivola.fi> parents: 47 diff changeset	2
52 237d1f5c1c32 hello: split out timer; add serial Tero Marttila <terom@paivola.fi> parents: 50 diff changeset	3	#include "stdlib.h"
57 ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	4
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	5	// XXX
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	6	#include "timer.c"
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	7	#include "serial.c"
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	8	#include "spi.c"
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	9	#include "led7.c"
47 7f930a94ee1e bravely step into the modern world of C-programming, using avr-gcc for a hello world... Tero Marttila <terom@paivola.fi> parents: diff changeset	10
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	11	static enum state {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	12	START = '\n',
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	13	CMD_SET = 's',
57 ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	14	CMD_INC = '+',
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	15	CMD_DEC = '-',
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	16	CMD_READ = 'r',
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	17	ARG_CHAR = '0',
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	18	ERROR = '!',
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	19	} state = START, cmd = 0;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	20
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	21	static enum {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	22	CMD_LED_1 = 0,
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	23	} cmd_led = 0;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	24
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	25	static char arg_char;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	26
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	27	static unsigned char led_state = 0;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	28
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	29	int command (enum state cmd)
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	30	{
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	31	switch (cmd) {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	32	case CMD_SET:
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	33	led_state = arg_char;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	34
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	35	return 0;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	36
57 ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	37	case CMD_INC:
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	38	if (led_state == 0xff)
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	39	return 1;
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	40
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	41	led_state++;
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	42	return 0;
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	43
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	44	case CMD_DEC:
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	45	if (!led_state)
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	46	return 1;
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	47
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	48	led_state--;
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	49	return 0;
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	50
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	51	case CMD_READ:
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	52	led_state = spi_rx[1]; // XXX
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	53	return 0;
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	54
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	55	default:
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	56	return 1;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	57	}
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	58	}
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	59
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	60	char input (char c)
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	61	{
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	62	if (c == '\r') {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	63	char ret = '?';
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	64
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	65	// command state
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	66	switch (state) {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	67	case START:
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	68	cmd = 0;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	69	break;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	70
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	71	case CMD_SET:
57 ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	72	case CMD_INC:
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	73	case CMD_DEC:
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	74	break;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	75
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	76	case ARG_CHAR:
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	77	break;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	78
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	79	case ERROR:
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	80	cmd = 0;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	81	break;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	82	}
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	83
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	84	// command
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	85	if (!cmd) {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	86	ret = ' ';
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	87	} else if (command(cmd)) {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	88	ret = '!';
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	89	} else {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	90	ret = '\n';
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	91	}
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	92
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	93	// return to START with response
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	94	state = START;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	95	return ret;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	96
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	97	} else if (31 < c && c < 128) {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	98	// process input char
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	99	switch (state) {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	100	case START:
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	101	if (c == 's') {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	102	cmd = CMD_SET;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	103	state = ARG_CHAR;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	104	arg_char = 0;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	105	} else if (c == 'S') {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	106	cmd = state = CMD_SET;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	107	arg_char = 255;
57 ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	108	} else if (c == '+') {
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	109	cmd = state = CMD_INC;
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	110	} else if (c == '-') {
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	111	cmd = state = CMD_DEC;
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	112	} else if (c == 'r') {
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	113	cmd = state = CMD_READ;
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	114	} else {
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	115	break;
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	116	}
57 ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	117
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	118	return state;
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	119	break;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	120
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	121	/*
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	122	case CMD_SET:
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	123	if (c == '1') {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	124	cmd_led = CMD_LED_1;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	125	state = ARG_CHAR;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	126	arg_char = 0;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	127	} else {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	128	state = ERROR;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	129	}
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	130
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	131	break;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	132	*/
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	133	case ARG_CHAR:
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	134	if (c >= '0' && c <= '9') {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	135	arg_char *= 10;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	136	arg_char += (c - '0');
57 ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	137	} else {
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	138	break;
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	139	}
57 ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	140
ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	141	return c;
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	142	break;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	143	}
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	144
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	145	// reject
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	146	state = ERROR;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	147	return ERROR;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	148
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	149	} else {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	150	// ignore
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	151	return ' ';
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	152	}
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	153	}
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	154
55 04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	155
04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	156	#define DEBUG_DDR DDRB
04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	157	#define DEBUG_PORT PORTB
04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	158	#define DEBUG_LED 0
04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	159
47 7f930a94ee1e bravely step into the modern world of C-programming, using avr-gcc for a hello world... Tero Marttila <terom@paivola.fi> parents: diff changeset	160	int main (void)
7f930a94ee1e bravely step into the modern world of C-programming, using avr-gcc for a hello world... Tero Marttila <terom@paivola.fi> parents: diff changeset	161	{
55 04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	162	led7_init();
49 f01fb659e54d hello: timer-based sleeps Tero Marttila <terom@paivola.fi> parents: 47 diff changeset	163	timer_init();
52 237d1f5c1c32 hello: split out timer; add serial Tero Marttila <terom@paivola.fi> parents: 50 diff changeset	164	serial_init();
55 04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	165	spi_init();
49 f01fb659e54d hello: timer-based sleeps Tero Marttila <terom@paivola.fi> parents: 47 diff changeset	166
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	167	// led_init();
55 04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	168	sbi(&DEBUG_DDR, DEBUG_LED);
49 f01fb659e54d hello: timer-based sleeps Tero Marttila <terom@paivola.fi> parents: 47 diff changeset	169
f01fb659e54d hello: timer-based sleeps Tero Marttila <terom@paivola.fi> parents: 47 diff changeset	170	sei();
f01fb659e54d hello: timer-based sleeps Tero Marttila <terom@paivola.fi> parents: 47 diff changeset	171
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	172	// start
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	173	char c;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	174	unsigned short timeout = 0;
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	175
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	176	serial_write(state);
47 7f930a94ee1e bravely step into the modern world of C-programming, using avr-gcc for a hello world... Tero Marttila <terom@paivola.fi> parents: diff changeset	177
7f930a94ee1e bravely step into the modern world of C-programming, using avr-gcc for a hello world... Tero Marttila <terom@paivola.fi> parents: diff changeset	178	while (true) {
55 04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	179	// TODO: SPI timer
57 ee412c5be8b1 hello: split led7, inc/dec commands; read to read in dip state Tero Marttila <terom@paivola.fi> parents: 56 diff changeset	180	led7_update(led_state);
55 04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	181	spi_update();
04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	182
53 dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	183	// toggle
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	184	if (led_state == 0) {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	185	timeout = 0;
55 04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	186	cbi(&DEBUG_PORT, DEBUG_LED);
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	187
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	188	} else if (led_state == 255) {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	189	timeout = 0;
55 04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	190	sbi(&DEBUG_PORT, DEBUG_LED);
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	191
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	192	} else {
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	193	// as Hz
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	194	timeout = (16000 / led_state);
55 04c625712e35 hello: trivial spi bits Tero Marttila <terom@paivola.fi> parents: 54 diff changeset	195	xbi(&DEBUG_PORT, DEBUG_LED);
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	196	}
47 7f930a94ee1e bravely step into the modern world of C-programming, using avr-gcc for a hello world... Tero Marttila <terom@paivola.fi> parents: diff changeset	197
53 dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	198	// sleep
dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	199	if (timer_sleep(timeout)) {
dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	200	c = '.';
dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	201
dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	202	} else if ((c = serial_read())) {
dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	203	// got serial data
54 ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	204	c = input(c);
ec42f36d8614 hello: interactive console Tero Marttila <terom@paivola.fi> parents: 53 diff changeset	205
53 dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	206	} else {
dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	207	c = '?';
dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	208	}
49 f01fb659e54d hello: timer-based sleeps Tero Marttila <terom@paivola.fi> parents: 47 diff changeset	209
53 dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	210	// output...
dfe67409fbcd hello: interruptable timer sleep, with buffered serial IO Tero Marttila <terom@paivola.fi> parents: 52 diff changeset	211	serial_write(c);
47 7f930a94ee1e bravely step into the modern world of C-programming, using avr-gcc for a hello world... Tero Marttila <terom@paivola.fi> parents: diff changeset	212	}
7f930a94ee1e bravely step into the modern world of C-programming, using avr-gcc for a hello world... Tero Marttila <terom@paivola.fi> parents: diff changeset	213	}

author	Tero Marttila <terom@paivola.fi>
	Sun, 20 Apr 2014 21:55:44 +0300
changeset 77	975a2dffdcda
parent 57	ee412c5be8b1
permissions	-rw-r--r--