void SYS_PORTS_PinModeSelect ( PORTS_MODULE_ID index, PORTS_ANALOG_PIN pin,
PORTS_PIN_MODE mode)
{
#if defined(PLIB_PORTS_ExistsPinMode)
if(PLIB_PORTS_ExistsPinMode(index))
{
PLIB_PORTS_PinModeSelect ( index, pin, mode);
}
#endif
}
int main(void)
{
/* Disable JTAG to free up PORTA pins */
DDPCONbits.JTAGEN = 0;
/* Set lower 8 bits of PORTA as output for LEDs, clear the bits to ensure
there is no mismatch when they are toggled */
PLIB_PORTS_DirectionOutputSet(PORTS_ID_0, PORT_CHANNEL_A, (PORTS_DATA_MASK)0x00FF);
PLIB_PORTS_Clear(PORTS_ID_0, PORT_CHANNEL_A, (PORTS_DATA_MASK)0x00FF);
/* Set pin AN2 as analog input */
PLIB_PORTS_PinModeSelect(PORTS_ID_0, PORTS_ANALOG_PIN_2, PORTS_PIN_MODE_ANALOG);
/* ADC setup - ouput in integer format, trigger mode auto, enable autosample */
PLIB_ADC_ResultFormatSelect(ADC_ID_1, ADC_RESULT_FORMAT_INTEGER_16BIT);
PLIB_ADC_SamplingModeSelect(ADC_ID_1, ADC_SAMPLING_MODE_MUXA);
PLIB_ADC_ConversionTriggerSourceSelect(ADC_ID_1, ADC_CONVERSION_TRIGGER_INTERNAL_COUNT);
PLIB_ADC_VoltageReferenceSelect(ADC_ID_1, ADC_REFERENCE_VDD_TO_AVSS );
PLIB_ADC_SampleAcqusitionTimeSet(ADC_ID_1, 0x1F);
PLIB_ADC_ConversionClockSet(ADC_ID_1, SYS_FREQUENCY, 32);
/* Connect AN2 as positive input, Vref- as negative input */
PLIB_ADC_MuxChannel0InputPositiveSelect(ADC_ID_1, ADC_MUX_A, ADC_INPUT_POSITIVE_AN2);
PLIB_ADC_MuxChannel0InputNegativeSelect(ADC_ID_1, ADC_MUX_A, ADC_INPUT_NEGATIVE_VREF_MINUS);
/* Enable the ADC module */
PLIB_ADC_Enable(ADC_ID_1);
int potValue;
int i;
int ledMask;
/* Stuck in this loop, reading the potentiometer and writing to the LEDs */
while (1)
{
potValue = readPotentiometer();
potValue = potValue >> 7; /* 10-bit value to 3-bit value */
ledMask = 0;
/* Creates a mask for the LEDs, corresponding to the value read from
the potentiometer */
for (i = 0; i <= potValue; i++)
{
ledMask |= 1<<(i);
}
/* Write the mask to the LEDs */
PLIB_PORTS_Write(PORTS_ID_0, PORT_CHANNEL_A, (PORTS_DATA_MASK)ledMask);
}
/* Program should not go here during normal operation */
return EXIT_FAILURE;
}
void SYS_PORTS_Initialize(void)
{
/* AN and CN Pins Initialization */
PLIB_PORTS_AnPinsModeSelect(PORTS_ID_0, SYS_PORT_AD1PCFG, PORTS_PIN_MODE_DIGITAL);
PLIB_PORTS_CnPinsPullUpEnable(PORTS_ID_0, SYS_PORT_CNPUE);
PLIB_PORTS_CnPinsEnable(PORTS_ID_0, SYS_PORT_CNEN);
PLIB_PORTS_ChangeNoticeEnable(PORTS_ID_0);
/* PORT D Initialization */
PLIB_PORTS_DirectionOutputSet( PORTS_ID_0, PORT_CHANNEL_B, SYS_PORT_D_TRIS ^ 0xFFFF);
//PLIB_PORTS_DirectionOutputSet( PORTS_ID_0, PORT_CHANNEL_B, 0x2000);
PLIB_PORTS_OpenDrainEnable(PORTS_ID_0, PORT_CHANNEL_B, SYS_PORT_D_ODC);
PLIB_PORTS_PinModeSelect (PORTS_ID_0, PORTS_ANALOG_PIN_11, PORTS_PIN_MODE_DIGITAL);
}