| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2006 by Barry Wardell |
| * |
| * This program 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 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| #include "config.h" |
| #include "cpu.h" |
| #include "system.h" |
| #include "kernel.h" |
| #include "thread.h" |
| #include "adc.h" |
| |
| static unsigned short adcdata[NUM_ADC_CHANNELS]; |
| |
| unsigned short adc_read(int channel) |
| { |
| return adcdata[channel]; |
| } |
| |
| static void adc_tick(void) |
| { |
| if (ADCST & 0x10) { |
| adcdata[0] = ADCCH0 & 0x3ff; |
| adcdata[1] = ADCCH1 & 0x3ff; |
| adcdata[2] = ADCCH2 & 0x3ff; |
| adcdata[3] = ADCCH3 & 0x3ff; |
| adcdata[4] = ADCCH4 & 0x3ff; |
| ADCST = 0xa; |
| } |
| } |
| |
| void adc_init(void) |
| { |
| ADCR24 = 0xaaaaa; |
| ADCR28 = 0; |
| ADCST = 2; |
| ADCST = 0xa; |
| |
| while (!(ADCST & 0x10)); |
| adc_tick(); |
| |
| tick_add_task(adc_tick); |
| } |
| |