1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*
* 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);
}
|
