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add adc.c/adc.h to FM3 IAR project

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git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1318 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
dzzxzz 2011-03-08 07:57:12 +00:00
parent c4b51ff718
commit b2e2825fb8
2 changed files with 148 additions and 0 deletions
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116
bsp/fm3/adc.c Normal file
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/*
* File : adc.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2011, RT-Thread Develop Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2011-03-03 lgnq
*/
#include <rtthread.h>
#include <rthw.h>
#include <rtgui/event.h>
#include <rtgui/rtgui_server.h>
#include <rtgui/rtgui_system.h>
#include "mb9bf506r.h"
#include "adc.h"
static struct rt_device adc;
static rt_err_t rt_adc_init(rt_device_t dev)
{
RT_ASSERT(dev != RT_NULL);
if(!(dev->flag & RT_DEVICE_FLAG_ACTIVATED))
{
/* I/O setting AN08 - P18 */
FM3_GPIO->ADE |= 0x100;
FM3_GPIO->PFR1 = 0x100;
/* A/DC setting */
FM3_ADC0->SCIS1 = 0x01;
FM3_ADC0->ADSS1 = 0x00; /* sampling timming ADST0 */
FM3_ADC0->ADST1 = 0x43;
FM3_ADC0->ADCT = 0x02;
FM3_ADC0->SCCR = 0x10; /* FIFO clear,single mode */
FM3_ADC0->CMPCR = 0x00; /* disable comparator */
/* starting A/DC */
FM3_ADC0->SCCR |= 0x01; /* A/DC start */
dev->flag |= RT_DEVICE_FLAG_ACTIVATED;
}
return RT_EOK;
}
static rt_err_t rt_adc_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
RT_ASSERT(dev != RT_NULL);
switch (cmd)
{
case RT_DEVICE_CTRL_ADC_START:
FM3_ADC0->SCCR |= 0x1;
break;
case RT_DEVICE_CTRL_ADC_RESULT:
while(FM3_ADC0->ADSR & 0x1)
;
*((rt_uint16_t*)args) = FM3_ADC0->SCFD;
*((rt_uint16_t*)args) = *((rt_uint16_t*)args) >> 6;
*((rt_uint16_t*)args) = (*((rt_uint16_t*)args)*3300)/1024;
break;
}
return RT_EOK;
}
extern rt_thread_t info_tid;
rt_uint16_t adc_value;
static void adc_thread_entry(void *parameter)
{
rt_device_t device;
struct rtgui_event_command ecmd;
RTGUI_EVENT_COMMAND_INIT(&ecmd);
ecmd.type = RTGUI_CMD_USER_INT;
ecmd.command_id = ADC_UPDATE;
device = rt_device_find("adc");
while(1)
{
rt_device_control(device, RT_DEVICE_CTRL_ADC_START, RT_NULL);
rt_device_control(device, RT_DEVICE_CTRL_ADC_RESULT, &adc_value);
rtgui_thread_send(info_tid, &ecmd.parent, sizeof(ecmd));
rt_thread_delay(20);
}
}
static rt_thread_t adc_thread;
void rt_hw_adc_init(void)
{
adc.type = RT_Device_Class_Char; /* fixme: should be adc type */
adc.rx_indicate = RT_NULL;
adc.tx_complete = RT_NULL;
adc.init = rt_adc_init;
adc.open = RT_NULL;
adc.close = RT_NULL;
adc.read = RT_NULL;
adc.write = RT_NULL;
adc.control = rt_adc_control;
adc.user_data = RT_NULL;
adc_thread = rt_thread_create("adc", adc_thread_entry, RT_NULL, 384, 29, 5);
if(adc_thread != RT_NULL)
rt_thread_startup(adc_thread);
/* register a character device */
rt_device_register(&adc, "adc", RT_DEVICE_FLAG_RDWR);
}

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/*
* File : adc.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2011, RT-Thread Develop Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2011-03-03 lgnq
*/
#ifndef __ADC_H__
#define __ADC_H__
/* Exported constants ---------------------------------------------------------*/
/* Exported macro -------------------------------------------------------------*/
#define ADC_MODE_SINGLE 0x00UL
#define ADC_MODE_SCAN 0x01UL
#define ADC_MODE_TAILGATE 0x02UL
#define RT_DEVICE_CTRL_ADC_START 0xF1 /* start ADC conversion */
#define RT_DEVICE_CTRL_ADC_RESULT 0xF2 /* get ADC result */
#define ADC_UPDATE 0
/* Exported functions --------------------------------------------------------- */
void rt_hw_adc_init(void);
#endif /*__ADC_H__ */