In this lab, participants will harness the Hardware Abstraction Layer (HAL) to interface with a push/pull button connected to the Infineon PSoC 6 microcontroller. Upon pressing the button, participants will program the microcontroller to toggle an LED's state between ON and OFF. This hands-on activity aims to familiarize participants with basic input/output operations, demonstrating real-time hardware interactions and the effective use of HAL for device control.
Open Hardware Abstraction Layer (HAL) API to see the functions that use for GPIO Pin
HAL API documentation
The HAL API documentation provides a comprehensive set of functions to interact with the board efficiently. This API documentation offers detailed guidance on utilizing various functionalities to optimize your development process.
Coding
Coding: Open the main.c file and add the following code to the main(void) function.
Here is the sample functions that we use from the HAL API documentation
Build the Application
👉 Build the Application
Launching the Application
👉 Launching the Application
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
Launching Program
👉 Check the Result
🎉 Congratulations! You can now complete Lab103
Supported toolchains (make variable 'TOOLCHAIN')
GNU Arm® embedded compiler v10.3.1 (GCC_ARM) - Default value of TOOLCHAIN
int main(void)
{
cy_rslt_t result;
/* Initialize the device and board peripherals */
result = cybsp_init() ;
/*BSP init failed. Stop program execution */
if (result != CY_RSLT_SUCCESS)
{
CY_ASSERT(0);
}
__enable_irq();
/* Initialize the User LED */
cyhal_gpio_init(CYBSP_USER_LED, CYHAL_GPIO_DIR_OUTPUT, CYHAL_GPIO_DRIVE_STRONG, CYBSP_LED_STATE_ON);
/* Initialize the user button */
cyhal_gpio_init(CYBSP_USER_BTN, CYHAL_GPIO_DIR_INPUT, CYHAL_GPIO_DRIVE_PULLDOWN, CYBSP_BTN_OFF);
/* Initialize retarget-io to use the debug UART port. It sets up the standard input/output functions (such as printf)*/
cy_retarget_io_init(CYBSP_DEBUG_UART_TX, CYBSP_DEBUG_UART_RX, CY_RETARGET_IO_BAUDRATE);
printf("\x1b[2J\x1b[;H");
for (;;)
{
//Button is active low
if(!cyhal_gpio_read(CYBSP_USER_BTN)){
// Button is pressed
cyhal_gpio_write(CYBSP_USER_LED, CYBSP_LED_STATE_ON);
printf("Button Pressed --> LED ON \r\n");
cyhal_system_delay_ms(250);
}
else {
// Button is not pressed
cyhal_gpio_write(CYBSP_USER_LED, CYBSP_LED_STATE_OFF);
printf("Button not Pressed --> LED OFF \r\n");
cyhal_system_delay_ms(250);
}
}
}
