134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/*
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* File : adc.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2011, RT-Thread Develop Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2011-03-03 lgnq
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*/
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#include <rtthread.h>
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#include <rthw.h>
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#include "mb9bf506r.h"
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#include "adc.h"
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#include "led.h"
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#include "lcd.h"
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#ifdef RT_USING_RTGUI
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#include <rtgui/event.h>
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#include <rtgui/rtgui_server.h>
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#include <rtgui/rtgui_system.h>
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#endif
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static struct rt_device adc;
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static rt_err_t rt_adc_init(rt_device_t dev)
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{
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RT_ASSERT(dev != RT_NULL);
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if(!(dev->flag & RT_DEVICE_FLAG_ACTIVATED))
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{
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/* I/O setting AN08 - P18 */
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FM3_GPIO->ADE |= 0x100;
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FM3_GPIO->PFR1 = 0x100;
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/* A/DC setting */
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FM3_ADC0->SCIS1 = 0x01;
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FM3_ADC0->ADSS1 = 0x00; /* sampling timming ADST0 */
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FM3_ADC0->ADST1 = 0x43;
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FM3_ADC0->ADCT = 0x02;
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FM3_ADC0->SCCR = 0x10; /* FIFO clear,single mode */
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FM3_ADC0->CMPCR = 0x00; /* disable comparator */
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/* starting A/DC */
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FM3_ADC0->SCCR |= 0x01; /* A/DC start */
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dev->flag |= RT_DEVICE_FLAG_ACTIVATED;
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}
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return RT_EOK;
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}
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static rt_err_t rt_adc_control(rt_device_t dev, int cmd, void *args)
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{
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RT_ASSERT(dev != RT_NULL);
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switch (cmd)
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{
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case RT_DEVICE_CTRL_ADC_START:
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FM3_ADC0->SCCR |= 0x1;
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break;
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case RT_DEVICE_CTRL_ADC_RESULT:
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while(FM3_ADC0->ADSR & 0x1)
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;
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*((rt_uint16_t*)args) = FM3_ADC0->SCFD;
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*((rt_uint16_t*)args) = *((rt_uint16_t*)args) >> 6;
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*((rt_uint16_t*)args) = (*((rt_uint16_t*)args)*3300)/1024;
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break;
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}
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return RT_EOK;
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}
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extern struct rt_messagequeue mq;
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extern rt_thread_t info_tid;
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rt_uint16_t adc_value;
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static void adc_thread_entry(void *parameter)
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{
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rt_device_t device;
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#ifdef RT_USING_RTGUI
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struct rtgui_event_command ecmd;
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RTGUI_EVENT_COMMAND_INIT(&ecmd);
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ecmd.type = RTGUI_CMD_USER_INT;
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ecmd.command_id = ADC_UPDATE;
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#else
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struct lcd_msg msg;
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#endif
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device = rt_device_find("adc");
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while(1)
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{
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rt_device_control(device, RT_DEVICE_CTRL_ADC_START, RT_NULL);
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rt_device_control(device, RT_DEVICE_CTRL_ADC_RESULT, &adc_value);
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pwm_update(adc_value/3);
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#ifdef RT_USING_RTGUI
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rtgui_thread_send(info_tid, &ecmd.parent, sizeof(ecmd));
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#else
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msg.type = ADC_MSG;
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msg.adc_value = adc_value;
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rt_mq_send(&mq, &msg, sizeof(msg));
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#endif
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rt_thread_delay(20);
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}
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}
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static rt_thread_t adc_thread;
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void rt_hw_adc_init(void)
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{
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adc.type = RT_Device_Class_Char;
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adc.rx_indicate = RT_NULL;
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adc.tx_complete = RT_NULL;
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adc.init = rt_adc_init;
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adc.open = RT_NULL;
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adc.close = RT_NULL;
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adc.read = RT_NULL;
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adc.write = RT_NULL;
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adc.control = rt_adc_control;
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adc.user_data = RT_NULL;
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adc_thread = rt_thread_create("adc", adc_thread_entry, RT_NULL, 384, 26, 5);
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if(adc_thread != RT_NULL)
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rt_thread_startup(adc_thread);
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/* register a character device */
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rt_device_register(&adc, "adc", RT_DEVICE_FLAG_RDWR);
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}
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