This lab demonstrates the process of reading a potentiometer sensor value through an Analog-to-Digital Converter (ADC) and display with OLED on a PSoC 6 microcontroller.
🔥 Requirements
Resources
Links
Computer
💻
ModusToolbox™ software v3.0 or later
CY8CKIT-062S2-43012 Infineon Board
Technical Report
🚩 Let start
Create Application
Coding
Coding: Open the main.c file and add the following code to the main(void) function.
main.c
#include "cyhal.h"
#include "cybsp.h"
#include "stdio.h"
#include "cy8ckit_028_sense.h"
#include "GUI.h"
// Define function
void lcd_print_top(const char * s);
void lcd_print_bot(const char * s);
void lcd_print_line_n(const char * s,int linenum);
cyhal_i2c_t i2c;
cyhal_i2c_cfg_t i2c_cfg = {
.is_slave = false,
.address = 0,
.frequencyhal_hz = 400000
};
int main(void)
{
cy_rslt_t result;
cyhal_adc_t adc_obj;
cyhal_adc_channel_t adc_chan_0_obj;
char str[80];
/* Initialize the device and board peripherals */
result = cybsp_init();
CY_ASSERT(result == CY_RSLT_SUCCESS);
__enable_irq();
/* Initialize i2c */
result = cyhal_i2c_init(&i2c, CY8CKIT_028_SENSE_PIN_I2C_SDA, CY8CKIT_028_SENSE_PIN_I2C_SCL, NULL);
CY_ASSERT(result == CY_RSLT_SUCCESS);
result = cyhal_i2c_configure(&i2c, &i2c_cfg);
CY_ASSERT(result == CY_RSLT_SUCCESS);
/* Initialize the OLED display */
result = mtb_ssd1306_init_i2c(&i2c);
CY_ASSERT(result == CY_RSLT_SUCCESS);
/* ADC conversion result. */
int adc_out;
/* Initialize ADC. The ADC block which can connect to pin 10[6] is selected */
result = cyhal_adc_init(&adc_obj, P10_6, NULL);
// ADC configuration structure
const cyhal_adc_config_t ADCconfig ={
.continuous_scanning = false,
.resolution = 12,
.average_count = 1,
.average_mode_flags = 0,
.ext_vref_mv = 0,
.vneg = CYHAL_ADC_VNEG_VREF,
.vref = CYHAL_ADC_REF_VDDA,
.ext_vref = NC,
.is_bypassed = false,
.bypass_pin = NC
};
// Configure to use VDD as Vref
result = cyhal_adc_configure(&adc_obj, &ADCconfig);
/* Initialize ADC channel, allocate channel number 0 to pin 10[6] as this is the first channel initialized */
const cyhal_adc_channel_config_t channel_config = { .enable_averaging = false, .min_acquisition_ns = 220, .enabled = true };
result = cyhal_adc_channel_init_diff(&adc_chan_0_obj, &adc_obj, P10_6, CYHAL_ADC_VNEG, &channel_config);
GUI_Init();
for (;;)
{
/* Read the ADC conversion result for corresponding ADC channel. Repeat as necessary. */
adc_out = cyhal_adc_read(&adc_chan_0_obj);
sprintf(str,"ADC = %d\r\n", adc_out);
lcd_print_top(str);
cyhal_system_delay_ms(100);
sprintf(str,"Applied ES Lab");
lcd_print_line_n(str,2);
sprintf(str,"Lab 112 ADC read");
lcd_print_line_n(str,4);
lcd_print_bot("Template");
cyhal_system_delay_ms(1000);
}
}
// Create function for OLED
void lcd_print_top(const char * s){
GUI_GotoXY(0,0);
GUI_DispString(s);
}
void lcd_print_bot(const char * s){
GUI_GotoXY(0,50);
GUI_DispString(s);
}
void lcd_print_line_n(const char * s,int linenum){ //linenum is 1-6
int line = (linenum-1)*10;
GUI_GotoXY(0,line);
GUI_DispString(s);
}
Build the Application
Launching the 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.
Result
🎉 Congratulations! You can now complete Lab105
Supported toolchains (make variable 'TOOLCHAIN')
GNU Arm® embedded compiler v10.3.1 (GCC_ARM) - Default value of TOOLCHAIN
