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zigbee协议栈里怎么使用cc2530adc?

时间:10-02 整理:3721RD 点击:

uint16 ReadLightData( void )
{
uint16 reading = 0;


HalAdcSetReference( HAL_ADC_REF_AVDD );
reading = HalAdcRead (HAL_ADC_CHANNEL_6 , HAL_ADC_RESOLUTION_12);
return reading;
}

char str[9];
uint16 value;

osal_memset(str, 0, 9);
value = ReadLightData();
sprintf(str, "%d ", value);

我接的是p0.6口,输出到串口后一直显示200,不管是接3.3v还是gnd都没变化。

请问怎么调用hal_adc里的uint16 HalAdcRead (uint8 channel, uint8 resolution)函数,该怎么配置才能采集到电压?

你可能还没有使能IO的ADC功能,设置APCFG寄存器。

参考这边的详细配置: http://blog.csdn.net/qq_15647227/article/details/53393253

额,我去试试

感谢!

调用了下面的函数后还要配置那些东西才行啊?

uint16 HalAdcRead (uint8 channel, uint8 resolution)
{
int16 reading = 0;

#if (HAL_ADC == TRUE)
uint8 i, resbits;
uint8 adcChannel = 1;

/*
* If Analog input channel is AIN0..AIN7, make sure corresponing P0 I/O pin is enabled. The code
* does NOT disable the pin at the end of this function. I think it is better to leave the pin
* enabled because the results will be more accurate. Because of the inherent capacitance on the
* pin, it takes time for the voltage on the pin to charge up to its steady-state level. If
* HalAdcRead() has to turn on the pin for every conversion, the results may show a lower voltage
* than actuality because the pin did not have time to fully charge.
*/
if (channel < 8)
{
for (i=0; i < channel; i++)
{
adcChannel <<= 1;
}
}

/* Enable channel */
ADCCFG |= adcChannel;

/* Convert resolution to decimation rate */
switch (resolution)
{
case HAL_ADC_RESOLUTION_8:
resbits = HAL_ADC_DEC_064;
break;
case HAL_ADC_RESOLUTION_10:
resbits = HAL_ADC_DEC_128;
break;
case HAL_ADC_RESOLUTION_12:
resbits = HAL_ADC_DEC_256;
break;
case HAL_ADC_RESOLUTION_14:
default:
resbits = HAL_ADC_DEC_512;
break;
}

/* writing to this register starts the extra conversion */
ADCCON3 = channel | resbits | adcRef;

/* Wait for the conversion to be done */
while (!(ADCCON1 & HAL_ADC_EOC));

/* Disable channel after done conversion */
ADCCFG &= (adcChannel ^ 0xFF);

/* Read the result */
reading = (int16) (ADCL);
reading |= (int16) (ADCH << 8);

/* Treat small negative as 0 */
if (reading < 0)
reading = 0;

switch (resolution)
{
case HAL_ADC_RESOLUTION_8:
reading >>= 8;
break;
case HAL_ADC_RESOLUTION_10:
reading >>= 6;
break;
case HAL_ADC_RESOLUTION_12:
reading >>= 4;
break;
case HAL_ADC_RESOLUTION_14:
default:
reading >>= 2;
break;
}
#else
// unused arguments
(void) channel;
(void) resolution;
#endif

return ((uint16)reading);
}

这两个我也配置了
APCFG |= 0x40;
P0SEL |= 0x40;

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