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Code Issues Releases Activity

For now make the F4 PIOS_ADC return an error code if there is no new data in

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the ADC buffer.  This should be handled appropriately by the caller.
This commit is contained in:
James Cotton 2012-06-11 09:22:04 -05:00
parent 2db95a6b4f
commit 821a25e419
1 changed files with 4 additions and 0 deletions
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4
flight/PiOS/STM32F4xx/pios_adc.c
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@ -292,6 +292,7 @@ void PIOS_ADC_Config(uint32_t oversampling)
* @param[in] pin number
* @return ADC pin value averaged over the set of samples since the last reading.
* @return -1 if pin doesn't exist
* @return -2 if no data acquired since last read
*/
int32_t last_conv_value;
int32_t PIOS_ADC_PinGet(uint32_t pin)
@ -304,6 +305,9 @@ int32_t PIOS_ADC_PinGet(uint32_t pin)
return -1;
}
if (accumulator[pin].accumulator <= 0)
return -2;
/* return accumulated result and clear accumulator */
result = accumulator[pin].accumulator / (accumulator[pin].count ?: 1);
accumulator[pin].accumulator = 0;