adc.c

ZIGBEE 2006协议栈 BAT测试代码 RADIO PULSE MG2455

/*******************************************************************************
	- Chip		: MG24500/55
	- Author		: RadioPulse Inc, 2007.
	- Date		: 2007-07-02
	- Version		: VER 1.0	
*******************************************************************************/


#include "INCLUDE_TOP.h"

//- Ref : Reference Voltage
//	0	: Internal BGR Voltage. 	TOP=1.2V, 	BOT=0.3V,	VMID=0.75V
//	1	: TOP_BGR.			TOP=BGR, 	BOT=0V
//	2	: ACH2, ACH3.		TOP=ACH2, 	BOT=ACH3, 	VMID=0.75V
//	3	: VDD, GND.			TOP=1.5V,	BOT=0V

//- AdcChan	: ADC Channel
//	0	: ACH0
//	1	: ACH1
//	2	: ACH2
//	3	: ACH3
//	4	: difference of ACH0 and ACH1
//	5	: difference of ACH2 and ACH3
//	6	: Temprature Sensor
//	7	: Battery Monitoring
UINT8 ZHAL_ADC_SET(UINT8 Ena, UINT8 Ref, UINT8 AdcChan)
{
	UINT8	ERR;
	UINT8	ib;

	xSADCCON = AdcChan & 0x0F;
	xSADCCON |= (Ref & 0x03) << 4;

	ERR = 1;
	if(Ena)
	{
		xSADCCON |= 0x80;				// set bit[7]

		for(ib=0 ; ib<400 ; ib++)
		{			
			if(xSADCCON & 0x40)
			{
				ERR = 0;
				break;
			}
		}

		xSADCCON &= 0xBF;		// clear bit[6]		
	}
	else
	{
		ERR = 0;
	}

	return	ERR;
}

UINT16 ZHAL_ADC_GET()
{
	UINT16	SADC_OUT;

	SADC_OUT = (xSADCVALH << 8) | xSADCVALL ;

	return SADC_OUT;
}


//- AdcChan	: ADC Channel
//	0	: ACH0
//	1	: ACH1
//	2	: ACH2
//	3	: ACH3
//	4	: difference of ACH0 and ACH1
//	5	: difference of ACH2 and ACH3
//	6	: Temprature Sensor
//	7	: Battery Monitoring


//- RETURN	: ADC Output
UINT16 ZSYS_ADC_GET(UINT8 AdcChan)
{
	UINT16		ADC_READ;

	xMEAS2 &= 0xFC;		// clear bit[1:0]
	xMEAS2 |= 0x02;		// set bit[1:0]=2'b10
	xCLKON2 |= 0x03;		// set bit[1:0] = 2'b11, SADC/SDEC CLK Enable

	if(ZHAL_ADC_SET(1, 0, AdcChan))
	{
		ADC_READ = 0xFFFF;
	}
	else
	{
		ADC_READ = ZHAL_ADC_GET();
		ZHAL_ADC_SET(0, 0, 0);
	}

	xCLKON2 &= 0xFC;		// set bit[1:0] = 2'b00

	return	ADC_READ;
}