diff options
author | Christian Pointner <equinox@spreadspace.org> | 2015-02-24 23:23:30 +0100 |
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committer | Christian Pointner <equinox@spreadspace.org> | 2015-02-24 23:23:30 +0100 |
commit | 1193ef26a1f1431d4974a0235cd923786509bab1 (patch) | |
tree | b2b6c74003a8531c746b33dbcf3a88715cca6534 /tuer-rfid/limits.c | |
parent | moved tube-rotator to realraum github repo (diff) |
moved tuer-rfid to realraum github repo
Diffstat (limited to 'tuer-rfid/limits.c')
-rw-r--r-- | tuer-rfid/limits.c | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/tuer-rfid/limits.c b/tuer-rfid/limits.c deleted file mode 100644 index 28c30ca..0000000 --- a/tuer-rfid/limits.c +++ /dev/null @@ -1,81 +0,0 @@ -/* - * spreadspace avr utils - * - * - * Copyright (C) 2013-2014 Christian Pointner <equinox@spreadspace.org> - * Othmar Gsenger <otti@wirdorange.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 "limits.h" -#include <LUFA/Drivers/Peripheral/ADC.h> - -#define LIMITS_ADC_CHAN_NUM 8 -#define LIMITS_ADC_CHAN ADC_CHANNEL8 - -#define LIMITS_RINGBUF_SIZE 5 -/* HINT: this is compared to a sliding sum not an average! */ -#define LIMITS_TH_CLOSE 800 -#define LIMITS_TH_OPEN 2700 - -void limits_init(void) -{ - ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_128); - ADC_SetupChannel(LIMITS_ADC_CHAN_NUM); - ADC_StartReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | LIMITS_ADC_CHAN); -} - -static uint16_t sum = 0; - -void limits_task(void) -{ - static uint16_t r[LIMITS_RINGBUF_SIZE] = { 0 }; - static uint8_t idx = 0; - - if(ADC_IsReadingComplete()) { - r[idx] = ADC_GetResult(); - idx = (idx + 1) % LIMITS_RINGBUF_SIZE; - cli(); - sum = 0; - uint8_t i; - for(i=0; i<LIMITS_RINGBUF_SIZE; ++i) sum += r[i]; - sei(); - } -} - -limits_t limits_get(void) -{ - if(sum < LIMITS_TH_CLOSE) - return close; - - if(sum < LIMITS_TH_OPEN) - return moving; - - return open; -} - -const char* limits_to_string(limits_t limits) -{ - switch(limits) { - case moving: return "..."; - case open: return "opened"; - case close: return "closed"; - case both: return "error"; - } - return "invalid"; // gcc - shut the fuck up!!! -} |