AN4371 datasheet(24/29 Pages) STMICROELECTRONICS

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Appendix A

AN4371

24/29

DocID025337 Rev 1

ADC0.MCR.B.NSTART = 1;

// Start ADC0 normal conversion by setting

NSTART bit in the MCR

while (ADC0.STSR1.B.ST_EOC != 0);

ADC0.MCR.B.NSTART = 0;

// Stop ADC0 normal conversion by setting

NSTART bit in the MCR

if (ADC0.STSR1.B.STEP_RC != 0)

// Check if No RC-algorithm error has

occurred

{

while(1); // Self test failed

}

ADC0.STSR1.B.ST_EOC = 0;

}

3.5

Algorithm C example in CPU one-shot mode

void ADC1_CAPACITIVE_SELF_TEST (void)

{

uint8_t step = 0;

// Algorithm C

ADC1.MCR.B.PWDN = 0;

// Enable ADC1

/* 1 */

ADC1.MCR.B.CTUEN = 0;

// CPU mode

/* 2 */

ADC1.NCMR[0].B.CH0 = 1;

// ADC_0 channel 0 is set. Program NCMR0 to

select channels to be converted for normal conversion

/* 3 */

ADC1.MCR.B.MODE = 0;

// Program MCR[MODE] = 0 to select one shot

mode

/* 4 */

ADC1.STCR1.B.INPSAMP_C = 0xFF;

// Program sampling phase duration for

the test conversions

/* 5 */

ADC1.STCR3.B.ALG = 0x2;

// Select the Self Testing algorithm in

STCR3.ALG. Default is Algorithm S

/* 6 */

ADC1.STCR2.B.EN = 1;

// ADC_0 Enable self testing channel by

setting EN bit in the STCR2 register

/* 7 */

ADC1.MCR.B.NSTART = 1;

// Start ADC1 normal conversion by setting

NSTART bit in the MCR

/* 8 */

ADC1.STAW4R.B.THRL = ADC1_Self_Test_Flash_Calibration_Data[2]; // ADC1

Self-Test calibration - C algo S0 step) - Low Treshold Value

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