void WheelADC_init()
{
// --------初始化ADC12--------
GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P6,
GPIO_PIN4);
ADC12_A_init(ADC12_A_BASE, // 初始化ADC12，
ADC12_A_SAMPLEHOLDSOURCE_SC,
ADC12_A_CLOCKSOURCE_ADC12OSC,
ADC12_A_CLOCKDIVIDER_1);
ADC12_A_enable(ADC12_A_BASE); // 打开ADC12
ADC12_A_setupSamplingTimer(ADC12_A_BASE,// 建立采样定时器控制采样保持时间，16个clock
ADC12_A_CYCLEHOLD_64_CYCLES,
ADC12_A_CYCLEHOLD_4_CYCLES,
ADC12_A_MULTIPLESAMPLESDISABLE);
ADC12_A_memoryConfigure(ADC12_A_BASE,
ADC12_A_MEMORY_0,
ADC12_A_INPUT_A4,
ADC12_A_VREFPOS_AVCC, // VREF+ = AVCC
ADC12_A_VREFNEG_AVSS, // VREF- = AVSS
ADC12_A_ENDOFSEQUENCE);
//Enable memory buffer 0 interrupt
ADC12_A_clearInterrupt(ADC12_A_BASE,
ADC12_A_IFG0);
ADC12_A_enableInterrupt(ADC12_A_BASE,
ADC12IE0);
__delay_cycles(75);
}
void ADCInit(void)
{
GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P6,
GPIO_PIN0 + GPIO_PIN1 + GPIO_PIN2 +
GPIO_PIN3
);
//Initialize the ADC12_A Module
/*
* Base address of ADC12_A Module
* Use internal ADC12_A bit as sample/hold signal to start conversion
* USE MODOSC 5MHZ Digital Oscillator as clock source
* Use default clock divider of 1
*/
ADC12_A_init(ADC12_A_BASE,
ADC12_A_SAMPLEHOLDSOURCE_SC,
ADC12_A_CLOCKSOURCE_ADC12OSC,
ADC12_A_CLOCKDIVIDER_1
);
ADC12_A_enable(ADC12_A_BASE);
/*
* Base address of ADC12_A Module
* For memory buffers 0-7 sample/hold for 256 clock cycles
* For memory buffers 8-15 sample/hold for 4 clock cycles (default)
* Enable Multiple Sampling
*/
ADC12_A_setupSamplingTimer(ADC12_A_BASE,
ADC12_A_CYCLEHOLD_256_CYCLES,
ADC12_A_CYCLEHOLD_4_CYCLES,
ADC12_A_MULTIPLESAMPLESENABLE);
//Configure Memory Buffers
/*
* Base address of the ADC12_A Module
* Configure memory buffer 0
* Map input A0 to memory buffer 0
* Vref+ = AVcc
* Vref- = AVss
* Memory buffer 0 is not the end of a sequence
*/
ADC12_A_configureMemoryParam param0 = {0};
param0.memoryBufferControlIndex = ADC12_A_MEMORY_0;
param0.inputSourceSelect = ADC12_A_INPUT_A0;
param0.positiveRefVoltageSourceSelect = ADC12_A_VREFPOS_AVCC;
param0.negativeRefVoltageSourceSelect = ADC12_A_VREFNEG_AVSS;
param0.endOfSequence = ADC12_A_NOTENDOFSEQUENCE;
ADC12_A_configureMemory(ADC12_A_BASE,¶m0);
/*
* Base address of the ADC12_A Module
* Configure memory buffer 1
* Map input A1 to memory buffer 1
* Vref+ = AVcc
* Vref- = AVss
* Memory buffer 1 is not the end of a sequence
*
*/
ADC12_A_configureMemoryParam param1 = {0};
param1.memoryBufferControlIndex = ADC12_A_MEMORY_1;
param1.inputSourceSelect = ADC12_A_INPUT_A1;
param1.positiveRefVoltageSourceSelect = ADC12_A_VREFPOS_AVCC;
param1.negativeRefVoltageSourceSelect = ADC12_A_VREFNEG_AVSS;
param1.endOfSequence = ADC12_A_NOTENDOFSEQUENCE;
ADC12_A_configureMemory(ADC12_A_BASE,¶m1);
/*
* Base address of the ADC12_A Module
* Configure memory buffer 2
* Map input A2 to memory buffer 2
* Vref+ = AVcc
* Vref- = AVss
* Memory buffer 2 is not the end of a sequence
*/
ADC12_A_configureMemoryParam param2 = {0};
param2.memoryBufferControlIndex = ADC12_A_MEMORY_2;
param2.inputSourceSelect = ADC12_A_INPUT_A2;
param2.positiveRefVoltageSourceSelect = ADC12_A_VREFPOS_AVCC;
param2.negativeRefVoltageSourceSelect = ADC12_A_VREFNEG_AVSS;
param2.endOfSequence = ADC12_A_ENDOFSEQUENCE;
ADC12_A_configureMemory(ADC12_A_BASE,¶m2);
ADC12_A_startConversion(ADC12_A_BASE,
ADC12_A_MEMORY_0,
ADC12_A_REPEATED_SEQOFCHANNELS);
}
void main(void)
{
//Stop Watchdog Timer
WDT_A_hold(WDT_A_BASE);
PowerLevel_3();
Clk_MCLK_24M_SMCLK_3M_ACLK_32768Hz();
//Enable A/D channel inputs
GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P6,
GPIO_PIN0 + GPIO_PIN1 + GPIO_PIN2 +
GPIO_PIN3 + GPIO_PIN4 + GPIO_PIN5 +
GPIO_PIN6 + GPIO_PIN7
);
//Initialize the ADC12_A Module
/*
* Base address of ADC12_A Module
* Use internal ADC12_A bit as sample/hold signal to start conversion
* USE MODOSC 5MHZ Digital Oscillator as clock source
* Use default clock divider of 1
*/
ADC12_A_init(ADC12_A_BASE,
ADC12_A_SAMPLEHOLDSOURCE_SC,
ADC12_A_CLOCKSOURCE_ADC12OSC,
ADC12_A_CLOCKDIVIDER_1
);
ADC12_A_enable(ADC12_A_BASE);
/*
* Base address of ADC12_A Module
* For memory buffers 0-7 sample/hold for 256 clock cycles
* For memory buffers 8-15 sample/hold for 4 clock cycles (default)
* Enable Multiple Sampling
*/
ADC12_A_setupSamplingTimer(ADC12_A_BASE,
ADC12_A_CYCLEHOLD_256_CYCLES,
ADC12_A_CYCLEHOLD_4_CYCLES,
ADC12_A_MULTIPLESAMPLESENABLE);
//Configure Memory Buffers
/*
* Base address of the ADC12_A Module
* Configure memory buffer 0
* Map input A0 to memory buffer 0
* Vref+ = AVcc
* Vref- = AVss
* Memory buffer 0 is not the end of a sequence
*/
ADC12_A_configureMemoryParam param0 = {0};
param0.memoryBufferControlIndex = ADC12_A_MEMORY_0;
param0.inputSourceSelect = ADC12_A_INPUT_A0;
param0.positiveRefVoltageSourceSelect = ADC12_A_VREFPOS_AVCC;
param0.negativeRefVoltageSourceSelect = ADC12_A_VREFNEG_AVSS;
param0.endOfSequence = ADC12_A_NOTENDOFSEQUENCE;
ADC12_A_configureMemory(ADC12_A_BASE,¶m0);
/*
* Base address of the ADC12_A Module
* Configure memory buffer 1
* Map input A1 to memory buffer 1
* Vref+ = AVcc
* Vref- = AVss
* Memory buffer 1 is not the end of a sequence
*
*/
ADC12_A_configureMemoryParam param1 = {0};
param1.memoryBufferControlIndex = ADC12_A_MEMORY_1;
param1.inputSourceSelect = ADC12_A_INPUT_A1;
param1.positiveRefVoltageSourceSelect = ADC12_A_VREFPOS_AVCC;
param1.negativeRefVoltageSourceSelect = ADC12_A_VREFNEG_AVSS;
param1.endOfSequence = ADC12_A_NOTENDOFSEQUENCE;
ADC12_A_configureMemory(ADC12_A_BASE,¶m1);
/*
* Base address of the ADC12_A Module
* Configure memory buffer 2
* Map input A2 to memory buffer 2
* Vref+ = AVcc
* Vref- = AVss
* Memory buffer 2 is not the end of a sequence
*/
ADC12_A_configureMemoryParam param2 = {0};
param2.memoryBufferControlIndex = ADC12_A_MEMORY_2;
param2.inputSourceSelect = ADC12_A_INPUT_A2;
param2.positiveRefVoltageSourceSelect = ADC12_A_VREFPOS_AVCC;
param2.negativeRefVoltageSourceSelect = ADC12_A_VREFNEG_AVSS;
param2.endOfSequence = ADC12_A_NOTENDOFSEQUENCE;
ADC12_A_configureMemory(ADC12_A_BASE,¶m2);
/*
* Base address of the ADC12_A Module
* Configure memory buffer 3
* Map input A3 to memory buffer 3
* Vr+ = AVcc
* Vr- = AVss
* Memory buffer 3 IS the end of a sequence
*/
ADC12_A_configureMemoryParam param3 = {0};
param3.memoryBufferControlIndex = ADC12_A_MEMORY_3;
param3.inputSourceSelect = ADC12_A_INPUT_A3;
param3.positiveRefVoltageSourceSelect = ADC12_A_VREFPOS_AVCC;
param3.negativeRefVoltageSourceSelect = ADC12_A_VREFNEG_AVSS;
param3.endOfSequence = ADC12_A_ENDOFSEQUENCE;
ADC12_A_configureMemory(ADC12_A_BASE,¶m3);
//Enable memory buffer 3 interrupt
ADC12_A_clearInterrupt(ADC12_A_BASE,
ADC12IFG3);
ADC12_A_enableInterrupt(ADC12_A_BASE,
ADC12IE3);
//Enable/Start first sampling and conversion cycle
/*
* Base address of ADC12_A Module
* Start the conversion into memory buffer 0
* Use the repeated sequence of channels
*/
ADC12_A_startConversion(ADC12_A_BASE,
ADC12_A_MEMORY_0,
ADC12_A_REPEATED_SEQOFCHANNELS);
//Enter LPM0, Enable interrupts
__bis_SR_register(LPM0_bits + GIE);
//For debugger
__no_operation();
}
