Reading potentiometer sensor value via an ADC PDL

Lab 108

Lab Objective:

This lab demonstrates the process of reading a potentiometer sensor value through an Analog-to-Digital Converter (ADC) using a Peripheral Driver Library (PDL) on a PSoC 6 microcontroller.

🔥 Requirements

Resources	Links
Computer	💻
ModusToolbox™ software v3.0 or later	Link
CY8CKIT-062S2-43012 Infineon Board	Link
Technical Report	dropbox

🚩 Let start

Create Application

Create Application

Use Device Configurator and set the UART and ADC pin

Enable UART Pin:

Config ADC

Always do a file save

Coding

• Coding: Open the main.c file and add the following code to the main(void) function.

main.c

#include "cy_pdl.h"
#include "cyhal.h"
#include "cybsp.h"
#include "cy_retarget_io.h"
#include <stdio.h>

int main(void)
{
    cy_rslt_t result;

    // UART context variable
	cy_stc_scb_uart_context_t UART_context;

    /* Initialize the device and board peripherals */
    result = cybsp_init() ;
    if (result != CY_RSLT_SUCCESS)
    {
        CY_ASSERT(0);
    }

    __enable_irq();

    /* Configure and enable the UART peripheral */
	Cy_SCB_UART_Init(UART_HW, &UART_config, &UART_context);
	Cy_SCB_UART_Enable(UART_HW);

	// Initialize the AREF - block needed by ADC_HW ADC
	Cy_SysAnalog_Init(&AREF_config);
	// Initialize AREF
	Cy_SysAnalog_Enable();

	// Initialize the ADC
	Cy_SAR_Init(ADC_HW, &ADC_config);
	// Enable the ADC
	Cy_SAR_Enable(ADC_HW);

	int32_t ADCresult = 0; // ADC conversion result
	int32_t mVolts = 0; // Var to store voltage conversion of ADC result

    for (;;){
    	// Start a single conversion
		Cy_SAR_StartConvert(ADC_HW, CY_SAR_START_CONVERT_SINGLE_SHOT);
		if(Cy_SAR_IsEndConversion(ADC_HW, CY_SAR_WAIT_FOR_RESULT) == CY_SAR_SUCCESS){
			ADCresult = Cy_SAR_GetResult32(ADC_HW, 0);
			mVolts = Cy_SAR_CountsTo_mVolts(ADC_HW, 0, ADCresult);
		}
		char stringBuffer[20];
		sprintf(stringBuffer, "ADC = %ld\r\n", mVolts);
		Cy_SCB_UART_PutString(UART_HW, stringBuffer);
		Cy_SysLib_Delay(100);
    }
}

Build the Application

Build Application

Launching the Application

Launching Application

Note: Before launching the program to the board, make sure that you have already connected the board to the computer through a USB cable.

set up USB cable

Result

Once the device is set up, run the program. The microcontroller will continuously read the potentiometer's analog value, convert it to a digital signal through the ADC, and then convert that signal to millivolts using the PDL functions.

🎉 Congratulations! You can now complete Lab108

Supported toolchains (make variable 'TOOLCHAIN')

• GNU Arm® embedded compiler v10.3.1 (GCC_ARM) - Default value of TOOLCHAIN

• Arm® compiler v6.16 (ARM)

• IAR C/C++ compiler v9.30.1 (IAR)

Supported kits (make variable 'TARGET')

• PSoC™ 62S2 Wi-Fi Bluetooth® pioneer kit (CY8CKIT-062S2-43012)
• PSoC™ 62S1 Wi-Fi Bluetooth® pioneer kit (CYW9P62S1-43438EVB-01)
• PSoC™ 62S1 Wi-Fi Bluetooth® pioneer kit (CYW9P62S1-43012EVB-01)
• PSoC™ 62S3 Wi-Fi Bluetooth® prototyping kit (CY8CPROTO-062S3-4343W)

Related resources

Resources	Links
ModusToolbox™ Software Training	link

Other resources

Infineon provides a wealth of data at www.infineon.com to help you select the right device, and quickly and effectively integrate it into your design.

Document history

Document title: BILL_MTB-108 – Read potentiometer sensor value via an ADC PDL

Version	Description of change
1.0.0	Lab 108: Learn basic GPIO control with PSoC 6, using ADC read potentiometer sensor value via PDL

Authors:

• Assoc. Prof. Wiroon Sriborrirux

• Mr. Sriengchhun Chheang

• Mr. Sabol Socare

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