openadc10.c

Mplab C30编译器

#if defined(__PIC24F__)
#include <p24Fxxxx.h>
#endif
#include "adc.h"

#if defined (_ADC_1012_V1) || defined (_ADC_1012_V2_GB) 

/*************************************************************************************
Function Prototype : void OpenADC10(unsigned int config1, unsigned int config2,
                                   unsigned int config3, unsigned int configport,
                                   unsigned int configscan)
                                   
Include            : adc.h 

Description        : This function starts the A/D conversion. 

Arguments          : config1 - This contains the parameters to be configured in the 
                     ADCON1 register as defined below                              
                     Module On/Off
	                    ADC_MODULE_ON
	                    ADC_MODULE_OFF
	                 Idle mode operation
	                    ADC_IDLE_CONTINUE
	                    ADC_IDLE_STOP
                     Result output format
	                    ADC_FORMAT_SIGN_FRACT
	                    ADC_FORMAT_FRACT
	                    ADC_FORMAT_SIGN_INT
	                    ADC_FORMAT_INTG
                     Conversion trigger source
	                    ADC_CLK_AUTO
	                    ADC_CLK_MPWM
	                    ADC_CLK_TMR
	                    ADC_CLK_INT0
	                    ADC_CLK_MANUAL
                     Auto sampling select
	                    ADC_AUTO_SAMPLING_ON
	                    ADC_AUTO_SAMPLING_OFF
                     Sample enable
	                    ADC_SAMP_ON
	                    ADC_SAMP_OFF
	                    
                     config2 - This contains the parameters to be configured in the
                     ADCON2 register as defined below
                     Voltage Reference
	                    ADC_VREF_AVDD_AVSS
	                    ADC_VREF_EXT_AVSS
	                    ADC_VREF_AVDD_EXT
	                    ADC_VREF_EXT_EXT
                     Scan selection
	                    ADC_SCAN_ON
	                    ADC_SCAN_OFF
                     Number of samples between interrupts
	                    ADC_INTR_EACH_CONV
	                    ADC_INTR_2_CONV          
						ADC_INTR_3_CONV           
						.....      
						ADC_INTR_15_CONV          
						ADC_INTR_16_CONV   
					 Buffer mode select
					    ADC_ALT_BUF_ON
					    ADC_ALT_BUF_OFF
					 Alternate Input Sample mode select
					    ADC_ALT_INPUT_ON
					    ADC_ALT_INPUT_OFF										 
					
					 config3 - This contains the parameters to be configured in the
					 ADCON3 register as defined below
					 Auto Sample Time bits
					    ADC_SAMPLE_TIME_0
					    ADC_SAMPLE_TIME_1
					    .....
					    ADC_SAMPLE_TIME_30
					    ADC_SAMPLE_TIME_31
					 Conversion Clock Source select
					    ADC_CONV_CLK_INTERNAL_RC
					    ADC_CONV_CLK_SYSTEM
					 Conversion clock select
					    ADC_CONV_CLK_1Tcy
					    ADC_CONV_CLK_2Tcy
					    ....
					    ADC_CONV_CLK_256Tcy		
					 //This feature is available only on GB family devices
					 Charge Pump Enable\Disable   
				        ADC_CHARGE_PUMP_ENABLE   
					    ADC_CHARGE_PUMP_DISABLE	
					
					 configport - This contains the pin select to be configured into
					 the ADPCFG register as defined below
					    ENABLE_AN0_ANA                 
					    ENABLE_AN1_ANA                  
					    .....        
					    ENABLE_AN14_ANA                 
					    ENABLE_AN15_ANA                 
					    ENABLE_ALL_ANA_0_15             
					    ENABLE_ALL_DIG_0_15            
										
					 configscan - This contains the scan select parameter to be configured
					 into the  ADCSSL register as defined below				
					    ADC_SKIP_SCAN_AN0      
						ADC_SKIP_SCAN_AN1      
						.....
						ADC_SKIP_SCAN_AN14     
						ADC_SKIP_SCAN_AN15 
						ENABLE_ALL_INPUT_SCAN       
						DISABLE_ALL_INPU_SCAN   
					 
Return Value      : None
			
Remarks           : This function configures the ADC for the following parameters:
					Operating mode, Sleep mode behavior, Data o/p format, Sample Clk
					Source, VREF source, No of samples/int, Buffer Fill mode, Alternate i/p
				    sample mode, Auto sample time, Charge Pump enable/disable,Conv clock source, 
				    Conv Clock Select bits, Port Config Control bits.
************************************************************************************************/

void OpenADC10(unsigned int config1, unsigned int config2, unsigned int
               config3, unsigned int configport, unsigned int configscan)
{

    /* digital/analog mode selection on the port bits */
    AD1PCFG = configport;

    /* configures the input scan selection bits */
    AD1CSSL = configscan;

    /* config AD1CON3 */
    AD1CON3 = config3;

    /* config AD1CON2 */
    AD1CON2 = config2;

    /* config AD1CON1 */
    AD1CON1 = config1;

    /* assign SAMP bit */
    AD1CON1bits.SAMP = config1 >> 1;
}

#else
#warning "Does not build on this target"
#endif