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 * 2020-07-27 thread-liu first version
9 */
10
11 #include <board.h>
12
13 #if defined(BSP_USING_TIM14) && defined(BSP_USING_ADC2)
14
15 #include <rtthread.h>
16 #include <rtdevice.h>
17
18 #define HWTIMER_DEV_NAME "timer14"
19 #define HWADC_DEV_NAME "adc2"
20 #define REFER_VOLTAGE 330 /* voltage reference */
21 #define CONVERT_BITS (1 << 12) /* Conversion digit */
22 #define ADC_DEV_CHANNEL 6
23
24 static rt_adc_device_t adc_dev = RT_NULL;
25
timeout_cb(rt_device_t dev,rt_size_t size)26 static rt_err_t timeout_cb(rt_device_t dev, rt_size_t size)
27 {
28 rt_uint32_t value = 0 , vol = 0;
29
30 /* read adc value */
31 value = rt_adc_read(adc_dev, ADC_DEV_CHANNEL);
32 rt_kprintf("the value is :%d \n", value);
33
34 vol = value * REFER_VOLTAGE / CONVERT_BITS;
35 rt_kprintf("the voltage is :%d.%02d \n", vol / 100, vol % 100);
36
37 return 0;
38 }
39
hwtimer_stop(void)40 static int hwtimer_stop(void)
41 {
42 rt_err_t ret = RT_EOK;
43 rt_device_t hw_dev = RT_NULL;
44
45 hw_dev = rt_device_find(HWTIMER_DEV_NAME);
46 if (hw_dev == RT_NULL)
47 {
48 rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
49 return -RT_ERROR;
50 }
51
52 ret = rt_device_close(hw_dev);
53 if (ret != RT_EOK)
54 {
55 rt_kprintf("close %s device failed!\n", HWTIMER_DEV_NAME);
56 return ret;
57 }
58
59 /* close adc channel */
60 ret = rt_adc_disable(adc_dev, ADC_DEV_CHANNEL);
61
62 return ret;
63 }
64
hwtimer_start(void)65 static int hwtimer_start(void)
66 {
67 rt_err_t ret = RT_EOK;
68 rt_hwtimerval_t timeout_s;
69 rt_device_t hw_dev = RT_NULL;
70
71 rt_hwtimer_mode_t mode;
72
73 hw_dev = rt_device_find(HWTIMER_DEV_NAME);
74 if (hw_dev == RT_NULL)
75 {
76 rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
77 return -RT_ERROR;
78 }
79
80 /* find adc dev */
81 adc_dev = (rt_adc_device_t)rt_device_find(HWADC_DEV_NAME);
82 if (adc_dev == RT_NULL)
83 {
84 rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWADC_DEV_NAME);
85 return -RT_ERROR;
86 }
87
88 /* Open the device in read/write mode */
89 ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
90 if (ret != RT_EOK)
91 {
92 rt_kprintf("open %s device failed!\n", HWTIMER_DEV_NAME);
93 return ret;
94 }
95
96 /* Set the timeout callback function */
97 rt_device_set_rx_indicate(hw_dev, timeout_cb);
98
99 /* Set the mode to periodic timer */
100 mode = HWTIMER_MODE_PERIOD;
101 ret = rt_device_control(hw_dev, HWTIMER_CTRL_MODE_SET, &mode);
102 if (ret != RT_EOK)
103 {
104 rt_kprintf("set mode failed! ret is :%d\n", ret);
105 return ret;
106 }
107
108 timeout_s.sec = 5;
109 timeout_s.usec = 0;
110
111 if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
112 {
113 rt_kprintf("set timeout value failed\n");
114 return -RT_ERROR;
115 }
116
117 rt_thread_mdelay(3500);
118
119 rt_device_read(hw_dev, 0, &timeout_s, sizeof(timeout_s));
120 rt_kprintf("Read: Sec = %d, Usec = %d\n", timeout_s.sec, timeout_s.usec);
121
122 /* enable adc channel */
123 ret = rt_adc_enable(adc_dev, ADC_DEV_CHANNEL);
124
125 return ret;
126 }
127
tim_sample(int argc,char * argv[])128 static int tim_sample(int argc, char *argv[])
129 {
130 if (argc > 1)
131 {
132 if (!rt_strcmp(argv[1], "start"))
133 {
134 rt_kprintf("tim14 will start\n");
135 hwtimer_start();
136 return RT_EOK;
137 }
138 else if (!rt_strcmp(argv[1], "stop"))
139 {
140 hwtimer_stop();
141 rt_kprintf("stop tim14 success!\n");
142 return RT_EOK;
143 }
144 else
145 {
146 goto _exit;
147 }
148 }
149 _exit:
150 {
151 rt_kprintf("Usage:\n");
152 rt_kprintf("tim_sample start - start TIM14 \n");
153 rt_kprintf("tim_sample stop - stop TIM14 \n");
154 }
155
156 return -RT_ERROR;
157 }
158 MSH_CMD_EXPORT(tim_sample, tim sample);
159
160 #endif
161