1 /*
2 * Copyright (c) 2006-2021, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2011-03-03 lgnq First version
9 */
10
11 #include <rtthread.h>
12 #include <rthw.h>
13 #include "mb9bf506r.h"
14 #include "adc.h"
15 #include "led.h"
16 #include "lcd.h"
17
18 #ifdef RT_USING_RTGUI
19 #include <rtgui/event.h>
20 #include <rtgui/rtgui_server.h>
21 #include <rtgui/rtgui_system.h>
22 #endif
23
24 static struct rt_device adc;
25
rt_adc_init(rt_device_t dev)26 static rt_err_t rt_adc_init(rt_device_t dev)
27 {
28 RT_ASSERT(dev != RT_NULL);
29
30 if(!(dev->flag & RT_DEVICE_FLAG_ACTIVATED))
31 {
32 /* I/O setting AN08 - P18 */
33 FM3_GPIO->ADE |= 0x100;
34 FM3_GPIO->PFR1 = 0x100;
35
36 /* A/DC setting */
37 FM3_ADC0->SCIS1 = 0x01;
38 FM3_ADC0->ADSS1 = 0x00; /* sampling timming ADST0 */
39 FM3_ADC0->ADST1 = 0x43;
40 FM3_ADC0->ADCT = 0x02;
41 FM3_ADC0->SCCR = 0x10; /* FIFO clear,single mode */
42 FM3_ADC0->CMPCR = 0x00; /* disable comparator */
43
44 /* starting A/DC */
45 FM3_ADC0->SCCR |= 0x01; /* A/DC start */
46
47 dev->flag |= RT_DEVICE_FLAG_ACTIVATED;
48 }
49 return RT_EOK;
50 }
51
rt_adc_control(rt_device_t dev,int cmd,void * args)52 static rt_err_t rt_adc_control(rt_device_t dev, int cmd, void *args)
53 {
54 RT_ASSERT(dev != RT_NULL);
55
56 switch (cmd)
57 {
58 case RT_DEVICE_CTRL_ADC_START:
59 FM3_ADC0->SCCR |= 0x1;
60 break;
61
62 case RT_DEVICE_CTRL_ADC_RESULT:
63 while(FM3_ADC0->ADSR & 0x1)
64 ;
65 *((rt_uint16_t*)args) = FM3_ADC0->SCFD;
66 *((rt_uint16_t*)args) = *((rt_uint16_t*)args) >> 6;
67 *((rt_uint16_t*)args) = (*((rt_uint16_t*)args)*3300)/1024;
68 break;
69 }
70 return RT_EOK;
71 }
72
73 extern struct rt_messagequeue mq;
74 extern rt_thread_t info_tid;
75 rt_uint16_t adc_value;
adc_thread_entry(void * parameter)76 static void adc_thread_entry(void *parameter)
77 {
78 rt_device_t device;
79
80 #ifdef RT_USING_RTGUI
81 struct rtgui_event_command ecmd;
82
83 RTGUI_EVENT_COMMAND_INIT(&ecmd);
84 ecmd.type = RTGUI_CMD_USER_INT;
85 ecmd.command_id = ADC_UPDATE;
86 #else
87 struct lcd_msg msg;
88 #endif
89
90 device = rt_device_find("adc");
91
92 while(1)
93 {
94 rt_device_control(device, RT_DEVICE_CTRL_ADC_START, RT_NULL);
95 rt_device_control(device, RT_DEVICE_CTRL_ADC_RESULT, &adc_value);
96 pwm_update(adc_value/3);
97 #ifdef RT_USING_RTGUI
98 rtgui_thread_send(info_tid, &ecmd.parent, sizeof(ecmd));
99 #else
100 msg.type = ADC_MSG;
101 msg.adc_value = adc_value;
102 rt_mq_send(&mq, &msg, sizeof(msg));
103 #endif
104 rt_thread_delay(20);
105 }
106 }
107
108 static rt_thread_t adc_thread;
rt_hw_adc_init(void)109 void rt_hw_adc_init(void)
110 {
111 adc.type = RT_Device_Class_Char;
112 adc.rx_indicate = RT_NULL;
113 adc.tx_complete = RT_NULL;
114 adc.init = rt_adc_init;
115 adc.open = RT_NULL;
116 adc.close = RT_NULL;
117 adc.read = RT_NULL;
118 adc.write = RT_NULL;
119 adc.control = rt_adc_control;
120 adc.user_data = RT_NULL;
121
122 adc_thread = rt_thread_create("adc", adc_thread_entry, RT_NULL, 384, 26, 5);
123 if(adc_thread != RT_NULL)
124 rt_thread_startup(adc_thread);
125
126 /* register a character device */
127 rt_device_register(&adc, "adc", RT_DEVICE_FLAG_RDWR);
128 }
129
130