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支持adc分辨率可映射可设置 #8

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Merged
mysterywolf merged 2 commits into from
Apr 21, 2022
Merged

支持adc分辨率可映射可设置 #8

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12b9037
支持adc分辨率可映射可设置
mysterywolf Apr 21, 2022
8738b42
Update wiring_analog.c
mysterywolf Apr 21, 2022
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13 changes: 12 additions & 1 deletion core/wiring_analog.c
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Original file line number Diff line number Diff line change
Expand Up @@ -95,12 +95,23 @@ int analogRead(uint8_t pin)
{
#ifdef RT_USING_ADC
rt_adc_device_t adc_dev;
rt_uint32_t rt_adc_val;
rt_uint8_t resolution;

adc_dev = (rt_adc_device_t)rt_device_find(pin_map_table[pin].device_name);
if(adc_dev != RT_NULL)
{
rt_adc_enable(adc_dev, pin_map_table[pin].channel);
return rt_adc_read(adc_dev, pin_map_table[pin].channel);
rt_adc_val = rt_adc_read(adc_dev, pin_map_table[pin].channel);
if(rt_device_control((rt_device_t)adc_dev, RT_ADC_CMD_GET_RESOLUTION, &resolution) == RT_EOK)
{
return map(rt_adc_val, 0, _pow2(resolution)-1, 0, _pow2(_analog_read_resolution)-1);
}
else
{
LOG_W("This board doesn't support to adjust ADC resolution. It will return real ADC value!");
return rt_adc_val;
}
}
else
#endif /* RT_USING_ADC */
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