STC micro STC8A8K64D4 Series - Page 512

STC8A8K64D4 Series Manual
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sfr P_SW2 = 0xba;
#define ADCTIM (*(unsigned char volatile xdata *)0xfea8)
#define ADCEXCFG (*(unsigned char volatile xdata *)0xfead)
sfr P1M1 = 0x91;
sfr P1M0 = 0x92;
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xb1;
sfr P3M0 = 0xb2;
sfr P4M1 = 0xb3;
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
// ADCEXCFG = 0x04; //Set the ADC to convert 2 times to take the average automatically
// ADCEXCFG = 0x05; //Set the ADC to convert 4 times to take the average automatically
ADCEXCFG = 0x06; //Set the ADC to convert 8 times to take the average automatically
// ADCEXCFG = 0x07; //Set the ADC to convert 16 times to take the average automatically
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 result
}
}
Assembly code
;Operating frequency for test is 11.0592MHz