134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/*
|
|
* 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 "mb9bf506r.h"
|
|
#include "adc.h"
|
|
#include "led.h"
|
|
#include "lcd.h"
|
|
|
|
#ifdef RT_USING_RTGUI
|
|
#include <rtgui/event.h>
|
|
#include <rtgui/rtgui_server.h>
|
|
#include <rtgui/rtgui_system.h>
|
|
#endif
|
|
|
|
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 struct rt_messagequeue mq;
|
|
extern rt_thread_t info_tid;
|
|
rt_uint16_t adc_value;
|
|
static void adc_thread_entry(void *parameter)
|
|
{
|
|
rt_device_t device;
|
|
|
|
#ifdef RT_USING_RTGUI
|
|
struct rtgui_event_command ecmd;
|
|
|
|
RTGUI_EVENT_COMMAND_INIT(&ecmd);
|
|
ecmd.type = RTGUI_CMD_USER_INT;
|
|
ecmd.command_id = ADC_UPDATE;
|
|
#else
|
|
struct lcd_msg msg;
|
|
#endif
|
|
|
|
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);
|
|
pwm_update(adc_value/3);
|
|
#ifdef RT_USING_RTGUI
|
|
rtgui_thread_send(info_tid, &ecmd.parent, sizeof(ecmd));
|
|
#else
|
|
msg.type = ADC_MSG;
|
|
msg.adc_value = adc_value;
|
|
rt_mq_send(&mq, &msg, sizeof(msg));
|
|
#endif
|
|
rt_thread_delay(20);
|
|
}
|
|
}
|
|
|
|
static rt_thread_t adc_thread;
|
|
void rt_hw_adc_init(void)
|
|
{
|
|
adc.type = RT_Device_Class_Char;
|
|
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, 26, 5);
|
|
if(adc_thread != RT_NULL)
|
|
rt_thread_startup(adc_thread);
|
|
|
|
/* register a character device */
|
|
rt_device_register(&adc, "adc", RT_DEVICE_FLAG_RDWR);
|
|
}
|
|
|