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/*
* spreadspace avr utils
*
*
* Copyright (C) 2013 Christian Pointner <equinox@spreadspace.org>
*
* This file is part of spreadspace avr utils.
*
* spreadspace avr utils is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* spreadspace avr utils is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
*/
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
#include <avr/power.h>
#include <stdio.h>
#include "util.h"
#include "led.h"
#include "anyio.h"
#define ATS_PIN PINB
#define ATS_PORT PORTB
#define ATS_DDR DDRB
#define ATS_IN_A_SELECTED 0
#define ATS_IN_B_SELECTED 1
#define ATS_IN_A_OK 2
#define ATS_IN_B_OK 3
#define ATS_STATUS 7
#define ATS_LP_MAX 10000
void ats_init(void)
{
ATS_DDR = 0x00;
ATS_PORT = 0xFF;
}
inline char* ats_get_ats_status(uint8_t stat)
{
return (stat & (1<<ATS_STATUS)) ? "Error" : "Ok";
}
inline char* ats_get_selected(uint8_t stat)
{
stat &= (1<<ATS_IN_A_SELECTED) | (1<<ATS_IN_B_SELECTED);
switch(stat) {
case (1<<ATS_IN_A_SELECTED): return "A";
case (1<<ATS_IN_B_SELECTED): return "B";
default: return "?";
}
}
inline char* ats_get_input_a(uint8_t stat)
{
return (stat & (1<<ATS_IN_A_OK)) ? "Offline" : "Online";
}
inline char* ats_get_input_b(uint8_t stat)
{
return (stat & (1<<ATS_IN_B_OK)) ? "Offline" : "Online";
}
void ats_print_status(uint8_t stat)
{
printf("Status: %s, Input %s is selected (A: %s, B: %s)\r\n",
ats_get_ats_status(stat), ats_get_selected(stat), ats_get_input_a(stat), ats_get_input_b(stat));
}
uint8_t ats_get_status(void)
{
static uint8_t last_stat = 0;
static uint16_t lp_cnt = 0;
uint8_t stat = ATS_PIN;
if(stat != last_stat)
lp_cnt++;
else
lp_cnt += lp_cnt ? -1 : 0;
if(lp_cnt >= ATS_LP_MAX) {
last_stat = stat;
lp_cnt = 0;
}
return last_stat;
}
void ats_task(void)
{
static uint8_t old_stat = 0;
uint8_t new_stat = ats_get_status();
if(old_stat != new_stat) {
ats_print_status(new_stat);
old_stat = new_stat;
}
}
void handle_cmd(uint8_t cmd)
{
switch(cmd) {
case '0': led_off(); printf("ok\r\n"); break;
case '1': led_on(); printf("ok\r\n"); break;
case 't': led_toggle(); printf("ok\r\n"); break;
case 's': ats_print_status(ATS_PIN); break;
/* case 'r': reset2bootloader(); break; */ // for testing only
default: printf("error: unknown command\r\n"); return;
}
}
int main(void)
{
MCUSR &= ~(1 << WDRF);
wdt_disable();
cpu_init();
led_init();
ats_init();
anyio_init(115200, 0);
sei();
for(;;) {
int16_t bytes_received = anyio_bytes_received();
while(bytes_received > 0) {
int received_byte = fgetc(stdin);
if(received_byte != EOF) {
handle_cmd(received_byte);
}
bytes_received--;
}
anyio_task();
ats_task();
}
}
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