161 lines
3.9 KiB
C
161 lines
3.9 KiB
C
/*
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2020-07-27 thread-liu first version
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*/
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#include <board.h>
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#if defined(BSP_USING_TIM14) && defined(BSP_USING_ADC2)
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#include <rtthread.h>
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#include <rtdevice.h>
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#define HWTIMER_DEV_NAME "timer14"
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#define HWADC_DEV_NAME "adc2"
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#define REFER_VOLTAGE 330 /* voltage reference */
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#define CONVERT_BITS (1 << 12) /* Conversion digit */
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#define ADC_DEV_CHANNEL 6
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static rt_adc_device_t adc_dev = RT_NULL;
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static rt_err_t timeout_cb(rt_device_t dev, rt_size_t size)
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{
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rt_uint32_t value = 0 , vol = 0;
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/* read adc value */
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value = rt_adc_read(adc_dev, ADC_DEV_CHANNEL);
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rt_kprintf("the value is :%d \n", value);
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vol = value * REFER_VOLTAGE / CONVERT_BITS;
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rt_kprintf("the voltage is :%d.%02d \n", vol / 100, vol % 100);
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return 0;
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}
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static int hwtimer_stop(void)
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{
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rt_err_t ret = RT_EOK;
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rt_device_t hw_dev = RT_NULL;
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hw_dev = rt_device_find(HWTIMER_DEV_NAME);
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if (hw_dev == RT_NULL)
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{
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rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
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return RT_ERROR;
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}
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ret = rt_device_close(hw_dev);
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if (ret != RT_EOK)
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{
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rt_kprintf("close %s device failed!\n", HWTIMER_DEV_NAME);
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return ret;
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}
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/* close adc channel */
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ret = rt_adc_disable(adc_dev, ADC_DEV_CHANNEL);
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return ret;
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}
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static int hwtimer_start(void)
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{
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rt_err_t ret = RT_EOK;
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rt_hwtimerval_t timeout_s;
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rt_device_t hw_dev = RT_NULL;
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rt_hwtimer_mode_t mode;
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hw_dev = rt_device_find(HWTIMER_DEV_NAME);
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if (hw_dev == RT_NULL)
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{
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rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
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return RT_ERROR;
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}
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/* find adc dev */
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adc_dev = (rt_adc_device_t)rt_device_find(HWADC_DEV_NAME);
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if (adc_dev == RT_NULL)
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{
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rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWADC_DEV_NAME);
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return RT_ERROR;
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}
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/* Open the device in read/write mode */
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ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
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if (ret != RT_EOK)
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{
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rt_kprintf("open %s device failed!\n", HWTIMER_DEV_NAME);
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return ret;
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}
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/* Set the timeout callback function */
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rt_device_set_rx_indicate(hw_dev, timeout_cb);
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/* Set the mode to periodic timer */
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mode = HWTIMER_MODE_PERIOD;
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ret = rt_device_control(hw_dev, HWTIMER_CTRL_MODE_SET, &mode);
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if (ret != RT_EOK)
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{
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rt_kprintf("set mode failed! ret is :%d\n", ret);
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return ret;
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}
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timeout_s.sec = 5;
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timeout_s.usec = 0;
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if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
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{
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rt_kprintf("set timeout value failed\n");
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return RT_ERROR;
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}
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rt_thread_mdelay(3500);
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rt_device_read(hw_dev, 0, &timeout_s, sizeof(timeout_s));
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rt_kprintf("Read: Sec = %d, Usec = %d\n", timeout_s.sec, timeout_s.usec);
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/* enable adc channel */
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ret = rt_adc_enable(adc_dev, ADC_DEV_CHANNEL);
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return ret;
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}
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static int tim_sample(int argc, char *argv[])
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{
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if (argc > 1)
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{
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if (!rt_strcmp(argv[1], "start"))
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{
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rt_kprintf("tim14 will start\n");
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hwtimer_start();
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return RT_EOK;
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}
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else if (!rt_strcmp(argv[1], "stop"))
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{
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hwtimer_stop();
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rt_kprintf("stop tim14 success!\n");
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return RT_EOK;
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}
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else
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{
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goto _exit;
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}
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}
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_exit:
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{
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rt_kprintf("Usage:\n");
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rt_kprintf("tim_sample start - start TIM14 \n");
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rt_kprintf("tim_sample stop - stop TIM14 \n");
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}
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return RT_ERROR;
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}
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MSH_CMD_EXPORT(tim_sample, tim sample);
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#endif
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