Microcontroller is not sending data over serial line, but does appear to be collecting it
Is there something wrong with my code/settings? I tried using putty's terminal to view the output; however, even though I configured it correctly with the baud settings, etc., no data is appearing.
It is on a NUCLEO-F767ZI Microprocessor. I am using STM32CubeIDE.
This is my code:
#include <stdio.h>
#include <stdlib.h>
#include "stm32f7xx_hal.h"
TIM_HandleTypeDef htim;
GPIO_InitTypeDef GPIO_InitStruct;
ADC_HandleTypeDef hadc;
#define PWM_PIN GPIO_PIN_0
#define PWM_PORT GPIOA
#define ADC_PIN GPIO_PIN_1
#define ADC_PORT GPIOA
void Error_Handler(void) {return;}
void SystemClock_Config(void) {return;}
void init_gpio(void) {
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = PWM_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(PWM_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = ADC_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
HAL_GPIO_Init(ADC_PORT, &GPIO_InitStruct);
}
void init_timer(void) {
__HAL_RCC_TIM2_CLK_ENABLE();
htim.Instance = TIM2;
htim.Init.Prescaler = 0;
htim.Init.CounterMode = TIM_COUNTERMODE_UP;
htim.Init.Period = SystemCoreClock / 5000000;
htim.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_PWM_Init(&htim);
TIM_OC_InitTypeDef sConfig;
sConfig.OCMode = TIM_OCMODE_PWM1;
sConfig.Pulse = htim.Init.Period / 2;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_PWM_ConfigChannel(&htim, &sConfig, TIM_CHANNEL_1);
}
void init_adc(void) {
__HAL_RCC_ADC1_CLK_ENABLE();
hadc.Instance = ADC1;
hadc.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
hadc.Init.Resolution = ADC_RESOLUTION_12B;
hadc.Init.ScanConvMode = DISABLE;
hadc.Init.ContinuousConvMode = DISABLE;
hadc.Init.DiscontinuousConvMode = DISABLE;
hadc.Init.NbrOfDiscConversion = 0;
hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc.Init.NbrOfConversion = 1;
hadc.Init.DMAContinuousRequests = DISABLE;
hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
HAL_ADC_Init(&hadc);
ADC_ChannelConfTypeDef sConfig;
sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = 1;
sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
HAL_ADC_ConfigChannel(&hadc, &sConfig);
}
int main(void) {
HAL_Init();
init_gpio();
init_timer();
init_adc();
uint32_t start_time = 0;
float input_voltage = 0.0f;
HAL_TIM_PWM_Start(&htim, TIM_CHANNEL_1);
printf("Hello World\n");
fflush(stdout);
start_time = HAL_GetTick(); // Start time for capturing voltage data
while (HAL_GetTick() - start_time < 5000000) // Capture data for 5 seconds
{
HAL_ADC_Start(&hadc);
HAL_ADC_PollForConversion(&hadc, HAL_MAX_DELAY);
uint32_t adc_value = HAL_ADC_GetValue(&hadc);
input_voltage = (float)adc_value / 4095.0f * 3.3f;
HAL_ADC_Stop(&hadc);
printf("Time: %lu ms, Input Voltage: %.2f V\n", HAL_GetTick() - start_time, input_voltage);
fflush(stdout);
HAL_Delay(1); // Delay between voltage measurements
}
HAL_TIM_PWM_Stop(&htim, TIM_CHANNEL_1);
while (1) {
// Do nothing
}
}