AN4371 datasheet(21/29 Pages) STMICROELECTRONICS

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AN4371

Appendix A

ADC0.STCR3.B.ALG = 0x0;

// Select the Self Testing algorithm in

STCR3.ALG. Default is Algorithm S

/* 6 */

ADC0.STCR2.B.EN = 1;

// ADC0 Enable self testing channel by setting

EN bit in the STCR2 register

/* 7 */

/* Step 0

ADC0 internal bandgap voltage register configuration */

ADC0.STCR3.B.MSTEP = 0;

// For Scan-shot mode, defines the first

step for algorithms S

ADC0.STAW0R.B.THRL = ADC0_Self_Test_Flash_Calibration_Data[6];

Set ADC0 Self-Test calibration data - S algo S0 step - 3.3V

ADC0.STAW0R.B.THRH = ADC0_Self_Test_Flash_Calibration_Data[7];

Set ADC0 Self-Test calibration data - S algo S0 step - 3.3V

ADC0.STAW0R.B.AWDE = 1;

// Enable analog watchdog related to the

algorithm S (step 0)

/* Step 1 - ADC supply voltage register configuration */

/* Integer */

ADC0.STAW1AR.B.THRL = ADC0_Self_Test_Flash_Calibration_Data[10];

Set ADC0 Self-Test calibration data - S algo S1 step - (integer) - Low

Treshold Value

ADC0.STAW1AR.B.THRH = ADC1_Self_Test_Flash_Calibration_Data[11];

Set ADC0 Self-Test calibration data - S algo S1 step - (integer) - High

Treshold Value

/* Float */

ADC0.STAW1BR.B.THRL = ADC0_Self_Test_Flash_Calibration_Data[12];

Set ADC0 Self-Test calibration data - S algo S1 step - (float) - Low

Treshold Value

ADC0.STAW1BR.B.THRH = ADC0_Self_Test_Flash_Calibration_Data[13];

ADC0.STAW1AR.B.AWDE = 1;

// Enable analog watchdog related to the

algorithm S (step 1)

/* Step 2 - ADC reference voltage register configuration */

ADC0.STAW2R.B.THRL = ADC0_Self_Test_Flash_Calibration_Data[14];

Set ADC0 Self-Test calibration data - S algo S2 step) - Low Treshold Value

ADC0.STAW2R.B.AWDE = 1;

// Enable analog watchdog related to the

algorithm S (step 2)

ADC0.MCR.B.NSTART = 1;

// Start ADC0 normal conversion by setting

NSTART bit in the MCR

ADC0.MCR.B.NSTART = 0;

// Stop ADC0 normal conversion by setting

NSTART bit in the MCR

while (ADC0.ISR.B.ECH == 0);

ADC0.ISR.B.ECH = 1;

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

ADC0.STSR1.B.ST_EOC = 1;

if (ADC0.STSR1.B.ERR_S0 == 1 || ADC0.STSR1.B.ERR_S1 == 1 ||

ADC0.STSR1.B.ERR_S2 == 1)

// Check if No S-algorithm error has occurred

{

while(1); // Self test failed

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