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Added new ADC_DisableChannel() function (thanks to Mich Davis).

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This commit is contained in:
Dean Camera 2010-05-18 12:51:31 +00:00
parent f13bc35a19
commit d3699d0261
2 changed files with 44 additions and 1 deletions
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43
LUFA/Drivers/Peripheral/AVRU4U6U7/ADC.h
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@ -287,6 +287,49 @@
#endif
}
/** Deconfigures the given ADC channel, re-enabling digital I/O mode instead of analog. This
* function sets the associated port pin as an input and re-enabled the digital portion of
* the I/O.
*
* \note This must only be called for ADC channels with are connected to a physical port
* pin of the AVR, denoted by its special alternative function ADCx.
* \n\n
*
* \note The channel number must be specified as an integer, and NOT a ADC_CHANNELx mask.
*
* \param[in] Channel ADC channel number to set up for conversions
*/
static inline void ADC_DisableChannel(const uint8_t Channel)
{
#if (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || \
defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB647__) || \
defined(__AVR_ATmega32U6__))
DDRF &= ~(1 << Channel);
DIDR0 &= ~(1 << Channel);
#elif (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
if (Channel < 8)
{
DDRF &= ~(1 << Channel);
DIDR0 &= ~(1 << Channel);
}
else if (Channel == 8)
{
DDRD &= ~(1 << 4);
DIDR2 &= ~(1 << 0);
}
else if (Channel < 11)
{
DDRD &= ~(1 << (Channel - 3));
DIDR2 &= ~(1 << (Channel - 8));
}
else
{
DDRB &= ~(1 << (Channel - 7));
DIDR2 &= ~(1 << (Channel - 8));
}
#endif
}
/** Starts the reading of the given channel, but does not wait until the conversion has completed.
* Once executed, the conversion status can be determined via the \ref ADC_IsReadingComplete() macro and
* the result read via the \ref ADC_GetResult() macro.