Adc polling

duong — Wed, 13 Sep 2023 16:19:24 GMT

I read adc value to control a led, but it doesm't work. this is my code.
in file drive.c

typedef struct

{

uint8_t clockDivide;

uint8_t sampleTime;

uint8_t resolution;

uint8_t inputClock;

uint8_t triggerType;

uint8_t voltageRef;

bool dmaEnable;

} adc_config_t;

typedef struct

{

uint8_t controlChannel;

uint8_t inputChannel;

bool enableInterrupt;

} adc_channel_t;

void ADC_strriger(){}

uint8_t ADC_Init(adc_config_t * adcConfig)

{

if (adcConfig == NULL)

{

return 1;

}

ADC0->CFG1 &= ~ADC_CFG1_ADIV_MASK;

ADC0->CFG1 |= ADC_CFG1_ADIV(adcConfig->clockDivide);

ADC0->CFG1 &= ~ADC_CFG1_MODE_MASK;

ADC0->CFG1 |= ADC_CFG1_MODE(adcConfig->resolution);

ADC0->CFG1 &= ~ADC_CFG1_ADICLK_MASK;

ADC0->CFG1 |= ADC_CFG1_ADICLK(adcConfig->inputClock);

ADC0->CFG2 &= ~ADC_CFG2_SMPLTS_MASK;

ADC0->CFG2 |= ADC_CFG2_SMPLTS(adcConfig->sampleTime);

ADC0->SC2 &= ~ADC_SC2_ADTRG_MASK;

ADC0->SC2 |= ADC_SC2_ADTRG(adcConfig->triggerType);

ADC0->SC2 &= ~ADC_SC2_REFSEL_MASK;

ADC0->SC2 |= ADC_SC2_REFSEL(adcConfig->voltageRef);

ADC0->SC2 &= ~ADC_SC2_DMAEN_MASK;

if (adcConfig->dmaEnable == true)

{

ADC0->SC2 |= ADC_SC2_DMAEN(1);

}

else ADC0->SC2 |= ADC_SC2_DMAEN(0);

return 0xFFu;

}

uint8_t ADC_ConfigChannel(adc_channel_t * adcChannel)

{

uint32_t tempVal;

if(adcChannel==NULL) return 1;

tempVal = ADC0->SC1[adcChannel->controlChannel];

tempVal &= ~ADC_SC1_ADCH_MASK;

tempVal |= ADC_SC1_ADCH(adcChannel->inputChannel);

tempVal &= ~ADC_SC1_AIEN_MASK;

if(adcChannel->enableInterrupt==true)

tempVal |= ADC_SC1_AIEN(1);

else tempVal |= ADC_SC1_AIEN(0);

ADC0->SC1[adcChannel->controlChannel] = tempVal;

return 0xFFu; // success

}

void ADC_WaitConversionComplete(void)

{

while(((ADC0->SC1[0] & ADC_SC1_COCO_MASK)>>ADC_SC1_COCO_SHIFT) == 0);

}

uint8_t Clear_GPIO(uint8_t pinNumber)

{

PTD->PCOR = (uint32_t)(1 << pinNumber);

return 0;

}

void ADC_StartConversion(uint8_t inputChannel)

{

adc_config_t adcConfig =

{

1,255,1,0,0,0,false

};

(void)ADC_Init(&adcConfig);

adc_channel_t adcChannel = {

0,inputChannel,0

};

(void)ADC_ConfigChannel(&adcChannel);

ADC_WaitConversionComplete();

}

uint8_t Set_GPIO(uint8_t pinNumber)

{

PTD->PSOR = (uint32_t)(1 << pinNumber);

return 0;

}

uint32_t ADC_GetConversionResult(uint8_t controlChannel)

{

return (uint32_t)(ADC0->R[controlChannel] & ADC_R_D_MASK);

}

void Init_GPIO(uint8_t pinNumber)

{

PCC-> PCCn[PCC_PORTD_INDEX] = PCC_PCCn_CGC_MASK;

PORTD->PCR[pinNumber] = PORT_PCR_MUX(1);

PTD->PDDR = (uint32_t)(1 << pinNumber);

PORTC->PCR[14]=PORT_PCR_MUX(0);

}

void ADC_ControlLight(uint8_t inputChannel)

{

Init_GPIO(15);

ADC_StartConversion(inputChannel);

uint32_t a=ADC_GetConversionResult(12);

if(a>=1024)Set_GPIO(15);

else Clear_GPIO(15);

}

/**********************************/
in file main.c

int appMain(void)

{

CLOCK_SYS_Init(g_clockManConfigsArr, CLOCK_MANAGER_CONFIG_CNT,

g_clockManCallbacksArr, CLOCK_MANAGER_CALLBACK_CNT);

CLOCK_SYS_UpdateConfiguration(0U, CLOCK_MANAGER_POLICY_AGREEMENT);

PCC->PCCn[PCC_ADC0_INDEX] &=~ PCC_PCCn_CGC_MASK; /* Disable clock to change PCS */

PCC->PCCn[PCC_ADC0_INDEX] |= PCC_PCCn_PCS(1); /* PCS=1: Select SOSCDIV2 */

PCC->PCCn[PCC_ADC0_INDEX] |= PCC_PCCn_CGC_MASK; /* Enable bus clock in ADC */

Init_GPIO();

while(1) {

ADC_ControlLight();

}

Re: Adc polling

Senlent — Thu, 14 Sep 2023 02:24:15 GMT

Hi@duong

If you have S32 Design for Arm V2.2 installed, you can find a similar demo.

For your convenience, I have upload the demo in the attachment for your reference.

Re: Adc polling

duong — Thu, 14 Sep 2023 11:29:32 GMT

how can I find other demo code in s32

Re: Adc polling

Senlent — Fri, 15 Sep 2023 01:44:02 GMT

Hi@duong

bare metal demo code .

topic Adc polling in S32K

Adc polling

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Re: Adc polling