sfr P4M0 = 0xb4;
sfr P5M1 = 0xc9;
sfr P5M0 = 0xca;
void main()
{
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;
P3M1 = 0x00;
P4M0 = 0x00;
P4M1 = 0x00;
P5M0 = 0x00;
P5M1 = 0x00;
P1M0 = 0x00; //Set P1.0 as ADC input
P1M1 = 0x01;
P_SW2 |= 0x80;
ADCTIM = 0x3f; // Set ADC internal timing
P_SW2 &= 0x7f;
ADCCFG = 0x0f; //Set the ADC clock to the system clock/2/16
ADC_CONTR = 0x80; //Enable ADC module
while (1)
{
ADC_CONTR |= 0x40; //Start AD conversion
_nop_();
_nop_();
while (!(ADC_CONTR & 0x20)); //Query ADC completion flag
ADC_CONTR &= ~0x20; //Clear completion flag
P2 = ADC_RES; //Read ADC results
}
}
Assembly code
;Operating frequency for test is 11.0592MHz
ADC_CONTR DATA 0BCH
ADC_RES DATA 0BDH
ADC_RESL DATA 0BEH
ADCCFG DATA 0DEH
P_SW2 DATA 0BAH
ADCTIM XDATA 0FEA8H
P0M1 DATA 093H
P0M0 DATA 094H
P1M1 DATA 091H
P1M0 DATA 092H
P2M1 DATA 095H
P2M0 DATA 096H
P3M1 DATA 0B1H
P3M0 DATA 0B2H
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