To configure the pins and write the program on STM32 microcontroller, you will need to use STM32CubeIDE or any other suitable IDE. Here is the code snippet in C that you can use:
```c
#include "stm32f4xx_hal.h"
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
GPIO_PinState switch_status;
while (1)
{
switch_status = HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_0);
if (switch_status == GPIO_PIN_SET)
{
// Switch is pressed
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13, GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_14, GPIO_PIN_RESET);
}
else
{
// Switch is not pressed
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_14, GPIO_PIN_SET);
}
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
__PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK |
RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq() / 1000);
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
__GPIOG_CLK_ENABLE();
__GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_13 | GPIO_PIN_14;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
```
Make sure to include the necessary header files and configure the microcontroller's clock as per your requirement.
Note: This code assumes that the LEDs are connected to pins PG13 and PG14, and the switch is connected to pin PA0 in active-high configuration.
Configure pins PG13 and PG14 as outputs and pin PA0 as input. Write a program to check the
status of the switch and indicate the status with LEDs. When the switch connected to PA0 is
pressed the LED connected to PG13 should be ON and LED connected to PG14 should be OFF,
otherwise the LED connected to PG13 should be OFF and LED connected to PG14 should be ON.
LEDs are connected as shown in figure 1. Switch connected to PA0 is active-high.
1 answer