AN4371 datasheet(25/29 Pages) STMICROELECTRONICS

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AN4371

Appendix A

ADC1.STAW4R.B.THRH = ADC1_Self_Test_Flash_Calibration_Data[3]; // ADC1

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

ADC1.STAW5R.B.THRL = ADC1_Self_Test_Flash_Calibration_Data[4]; // ADC1

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

ADC1.STAW5R.B.THRH = ADC1_Self_Test_Flash_Calibration_Data[5]; // ADC1

Self-Test calibration - C algo Sn step) - High Treshold Value

for(step=0;step<17;step++)

{

ADC1.STCR3.B.MSTEP = step;

// For one-shot mode, defines the current

step for algorithms S

ADC1.MCR.B.NSTART = 1;

// Start ADC1 normal conversion by setting

NSTART bit in the MCR

if (ADC1.STSR1.B.STEP_C != 0)

{

ADC_Self_Test_Fail[step+60] = 1;

// Check if No RC-algorithm

[step] error has occurred

}

3.6

Algorithm C example in CPU scan mode

void ADC0_CAPACITIVE_SELF_TEST_ScanMod (void)

{

// Algorithm C

ADC0.MCR.B.PWDN = 0;

// Enable ADC0

/* 1 */

ADC0.MCR.B.CTUEN = 0;

// CPU mode

/* 2 */

ADC0.NCMR[0].B.CH0 = 1;

// ADC_0 channel 0 is set. Program NCMR0 to

select channels to be converted for normal conversion

/* 3 */

ADC0.MCR.B.MODE = 1;

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

mode

/* 4 */

ADC0.STCR1.B.INPSAMP_C = 0xFF;

// Program sampling phase duration for

the test conversions

/* 5 */

ADC0.STCR3.B.ALG = 0x2;

// Select the Self Testing algorithm in

STCR3.ALG. Default is Algorithm S

/* 6 */

ADC0.STCR2.B.EN = 1;

// ADC_0 Enable self testing channel by

setting EN bit in the STCR2 register

/* 7 */

ADC0.STAW4R.B.THRL = ADC0_Self_Test_Flash_Calibration_Data[2]; // ADC0

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

ADC0.STAW4R.B.THRH = ADC0_Self_Test_Flash_Calibration_Data[3]; // ADC0

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

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