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authorbnewbold <bnewbold@robocracy.org>2010-03-31 08:52:45 +0800
committeriperry <iperry@gmail.com>2010-03-31 09:43:10 +0800
commit1d3861ef93f8423176c6010ab606abdab00a7cbd (patch)
tree5c95101e295bcfdd7f9f4292ce9204ddf7e7f662 /src/lib/adc.h
parent8d6bf3b196c2a0bc1adda4a04669e54fdc5b65cb (diff)
downloadlibrambutan-1d3861ef93f8423176c6010ab606abdab00a7cbd.tar.gz
librambutan-1d3861ef93f8423176c6010ab606abdab00a7cbd.zip
Major hierarchy reorganization; see README.
copy-to-ide and Makefile updated to conform; .gitignore added; LICENSE added
Diffstat (limited to 'src/lib/adc.h')
-rw-r--r--src/lib/adc.h93
1 files changed, 0 insertions, 93 deletions
diff --git a/src/lib/adc.h b/src/lib/adc.h
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-/* *****************************************************************************
- * 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 3 of the License, or
- * (at your option) any later version.
- *
- * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
- *
- * Created: 12/18/09 02:35:10
- * Copyright (c) 2009 Perry L. Hung. All rights reserved.
- *
- * ****************************************************************************/
-
-/**
- * @file adc.h
- *
- * @brief ADC prototypes and defines
- */
-
-#ifndef _ADC_H_
-#define _ADC_H_
-#include <inttypes.h>
-#include "util.h"
-
-#ifdef __cplusplus
-extern "C"{
-#endif
-
-/* Notes:
- * The maximum input impedance on each channel MUST be below .4kohms,
- * or face the wrath of incorrect readings...
- * This can be changed at the expense of sample time... see datasheet
- *
- * Need to up the sample time if otherwise... see datasheet */
-
-/* We'll only use ADC1 for now... */
-#define ADC_BASE 0x40012400
-#define ADC_SR *(volatile uint32_t*)(ADC_BASE + 0)
-#define ADC_CR1 *(volatile uint32_t*)(ADC_BASE + 0x4)
-#define ADC_CR2 *(volatile uint32_t*)(ADC_BASE + 0x8)
-#define ADC_SMPR1 *(volatile uint32_t*)(ADC_BASE + 0xC)
-#define ADC_SMPR2 *(volatile uint32_t*)(ADC_BASE + 0x10)
-#define ADC_SQR1 *(volatile uint32_t*)(ADC_BASE + 0x2C)
-#define ADC_SQR3 *(volatile uint32_t*)(ADC_BASE + 0x34)
-#define ADC_DR *(volatile uint32_t*)(ADC_BASE + 0x4C)
-
-#define CR2_EXTSEL_SWSTART (0xE << 16)
-#define CR2_RSTCAL (BIT(3))
-#define CR2_EXTTRIG (BIT(20))
-
-/* Bit banded bits */
-#define CR2_ADON_BIT *(volatile uint32_t*)(BITBAND_PERI(ADC_BASE+0x8, 0))
-#define CR2_CAL_BIT *(volatile uint32_t*)(BITBAND_PERI(ADC_BASE+0x8, 2))
-#define CR2_RSTCAL_BIT *(volatile uint32_t*)(BITBAND_PERI(ADC_BASE+0x8, 3))
-#define CR2_SWSTART_BIT *(volatile uint32_t*)(BITBAND_PERI(ADC_BASE+0x8 + 2, 6))
-#define SR_EOC_BIT *(volatile uint32_t*)(BITBAND_PERI(ADC_BASE+0, 1))
-
-#define NR_ANALOG_PINS 16
-
-/* Initialize ADC1 to do one-shot conversions */
-void adc_init(void);
-void adc_disable(void);
-
-/* Perform a single conversion on ADC[0-16],
- * PRECONDITIONS:
- * adc initialized */
-static inline int adc_read(int channel) {
- /* Set channel */
- ADC_SQR3 = channel;
-
- /* Start the conversion */
- CR2_SWSTART_BIT = 1;
-
- /* Wait for it to finish */
- while(SR_EOC_BIT == 0)
- ;
-
- return ADC_DR;
-}
-
-
-
-#ifdef __cplusplus
-} // extern "C"
-#endif
-#endif
-