forked from len0rd/rockbox
S5L8700: Implement ADC driver
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21734 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Bertrik Sikken
parent
402b8ebeae
commit
9ecde3d75c
5 changed files with 100 additions and 77 deletions
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@ -554,7 +554,8 @@ Lyre prototype 1*/
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#endif /* BOOTLOADER */
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#if defined(HAVE_USBSTACK) || (CONFIG_CPU == JZ4732) \
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|| (CONFIG_CPU == AS3525) || (CONFIG_CPU == S3C2440)
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|| (CONFIG_CPU == AS3525) || (CONFIG_CPU == S3C2440) \
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|| (CONFIG_CPU == S5L8700)
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#define HAVE_WAKEUP_OBJECTS
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#endif
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94
firmware/target/arm/s5l8700/adc-s5l8700.c
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94
firmware/target/arm/s5l8700/adc-s5l8700.c
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@ -0,0 +1,94 @@
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2009 by Bertrik Sikken
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "inttypes.h"
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#include "s5l8700.h"
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#include "adc.h"
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#include "adc-target.h"
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#include "kernel.h"
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/* Driver for the built-in ADC of the s5l8700
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The ADC is put into standby mode after each conversion.
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*/
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#define ADC_PRESCALER 100 /* 1MHz ADC clock, assuming 100 MHz PCLK */
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#define ADC_DEFAULT (1<<14) | /* prescale enable */ \
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((ADC_PRESCALER-1)<<6) | /* prescaler */ \
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(0<<3) | /* sel_mux */ \
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(0<<2) | /* stdbm */ \
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(0<<1) | /* read_start */ \
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(0<<0) /* enable start */ \
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static struct mutex adc_mtx;
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static struct wakeup adc_wakeup;
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void INT_ADC(void)
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{
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wakeup_signal(&adc_wakeup);
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}
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unsigned short adc_read(int channel)
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{
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unsigned short data;
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mutex_lock(&adc_mtx);
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/* set channel and start conversion */
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ADCCON = ADC_DEFAULT |
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(channel << 3) |
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(1 << 0); /* enable start */
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/* wait for conversion */
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wakeup_wait(&adc_wakeup, TIMEOUT_BLOCK);
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/* get the converted data */
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data = ADCDAT0;
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/* put ADC back into standby */
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ADCCON |= (1 << 2);
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mutex_unlock(&adc_mtx);
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return data;
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}
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void adc_init(void)
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{
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mutex_init(&adc_mtx);
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wakeup_init(&adc_wakeup);
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/* enable clock to ADC */
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PWRCON &= ~(1 << 10);
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/* configure ADC and put in standby */
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ADCCON = ADC_DEFAULT | (1 << 2);
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/* configure conversion delay (use default) */
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ADCDLY = 0xFF;
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/* enable interrupt */
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INTMSK |= (1 << 31);
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}
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@ -21,15 +21,13 @@
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#ifndef _ADC_TARGET_H_
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#define _ADC_TARGET_H_
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/* only two channels used by the Gigabeat */
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#define NUM_ADC_CHANNELS 1
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#define NUM_ADC_CHANNELS 4
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#define ADC_UNKNOWN_1 0
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#define ADC_UNKNOWN_2 1
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#define ADC_UNKNOWN_0 0
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#define ADC_UNKNOWN_1 1
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#define ADC_BATTERY 2
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#define ADC_UNKNOWN_4 3
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#define ADC_UNKNOWN_3 3
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#define ADC_UNREG_POWER ADC_BATTERY /* For compatibility */
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#define ADC_READ_ERROR 0xFFFF
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#endif
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@ -1,35 +0,0 @@
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2006 by Barry Wardell
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _ADC_TARGET_H_
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#define _ADC_TARGET_H_
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/* only two channels used by the Gigabeat */
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#define NUM_ADC_CHANNELS 1
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#define ADC_UNKNOWN_1 0
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#define ADC_UNKNOWN_2 1
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#define ADC_BATTERY 2
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#define ADC_UNKNOWN_4 3
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#define ADC_UNREG_POWER ADC_BATTERY /* For compatibility */
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#define ADC_READ_ERROR 0xFFFF
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#endif
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@ -1,35 +0,0 @@
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2006 by Barry Wardell
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _ADC_TARGET_H_
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#define _ADC_TARGET_H_
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/* only two channels used by the Gigabeat */
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#define NUM_ADC_CHANNELS 1
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#define ADC_UNKNOWN_1 0
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#define ADC_UNKNOWN_2 1
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#define ADC_BATTERY 2
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#define ADC_UNKNOWN_4 3
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#define ADC_UNREG_POWER ADC_BATTERY /* For compatibility */
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#define ADC_READ_ERROR 0xFFFF
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#endif
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