NUCLEOL152RE board adc_buffer not being written to

[abravexstove]

The ADC buffer is not being written to I would like it to zero all values less than 5 to eliminate noise. My project is a DTMF detector. I need it to pass through audio when no DTMF tone is detected and execute a command when there is one found. Also please assist with the pass-through function that is not working either  

#include "main.h"

#include <math.h>

#include <stdio.h>/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

char message5[40] = {'\0'};

static void MX_GPIO_Init(void);

static void MX_DMA_Init(void);

static void MX_USART2_UART_Init(void);

static void MX_TIM6_Init(void);

static void MX_ADC_Init(void);

static void MX_DAC_Init(void);

int main(void)

{

SystemClock_Config();

MX_GPIO_Init();

MX_DMA_Init();

MX_USART2_UART_Init();

MX_TIM6_Init();

MX_ADC_Init();

MX_DAC_Init();

/* USER CODE BEGIN 2 */

memset(adc_buffer, 0, sizeof(adc_buffer));

HAL_ADC_Start_DMA(&hadc, (uint32_t * ) adc_buffer, BLOCK_SIZE);

HAL_DAC_Start_DMA(&hdac, DAC_CHANNEL_1, (uint32_t *) dac_buffer, BLOCK_SIZE, DAC_ALIGN_12B_R);

HAL_TIM_Base_Start(&htim6);

while (1)

{

if (dataReady){

dataReady = 0;

for (int i = 0; i < BLOCK_SIZE; i++) {

if (adc_buffer[i] < NOISE_THRESHOLD) {

char debug_msg[50];

snprintf(debug_msg, sizeof(debug_msg), "Zeroing ADC[%d]: %u\r\n", i, adc_buffer[i]);

HAL_UART_Transmit(&huart2, (uint8_t*)debug_msg, strlen(debug_msg), HAL_MAX_DELAY);

adc_buffer[i] = 0; //

}

}

print_adc_values();

strcpy(message5, "callback \n \r");

HAL_UART_Transmit(&huart2,(uint8_t*)message5,sizeof(message5),100);

char tone = detect_tone((short*) ADCptr, BLOCK_SIZE); //if i ru into problems add + BLOCK_SIZE back

if (tone == '\0') {

for (int i = 0; i < BLOCK_SIZE; i++) {

DACptr[i] = ADCptr[i];

}

} else {

execute_command(tone);

for (int i = 0; i < BLOCK_SIZE; i++) {

DACptr[i] = 0; // Silence output

}

}

}

}

}

void SystemClock_Config(void)

{

RCC_OscInitTypeDef RCC_OscInitStruct = {0};

RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

RCC_OscInitStruct.HSIState = RCC_HSI_ON;

RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;

RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;

RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;

RCC_OscInitStruct.PLL.PLLDIV = RCC_PLL_DIV3;

if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

{

Error_Handler();

}

RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK

|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;

RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

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_1) != HAL_OK)

{

Error_Handler();

}

}

static void MX_ADC_Init(void)

{

ADC_ChannelConfTypeDef sConfig = {0};

hadc.Instance = ADC1;

hadc.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;

hadc.Init.Resolution = ADC_RESOLUTION_12B;

hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;

hadc.Init.ScanConvMode = ADC_SCAN_DISABLE;

hadc.Init.EOCSelection = ADC_EOC_SEQ_CONV;

hadc.Init.LowPowerAutoWait = ADC_AUTOWAIT_DISABLE;

hadc.Init.LowPowerAutoPowerOff = ADC_AUTOPOWEROFF_DISABLE;

hadc.Init.ChannelsBank = ADC_CHANNELS_BANK_A;

hadc.Init.ContinuousConvMode = ENABLE;

hadc.Init.NbrOfConversion = 1;

hadc.Init.DiscontinuousConvMode = DISABLE;

hadc.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T6_TRGO;

hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;

hadc.Init.DMAContinuousRequests = ENABLE;

if (HAL_ADC_Init(&hadc) != HAL_OK)

{

Error_Handler();

}

sConfig.Channel = ADC_CHANNEL_13;

sConfig.Rank = ADC_REGULAR_RANK_1;

sConfig.SamplingTime = ADC_SAMPLETIME_4CYCLES;

if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)

{

Error_Handler();

}

}

static void MX_DAC_Init(void)

{

DAC_ChannelConfTypeDef sConfig = {0};



hdac.Instance = DAC;

if (HAL_DAC_Init(&hdac) != HAL_OK)

{

Error_Handler();

}

sConfig.DAC_Trigger = DAC_TRIGGER_T6_TRGO;

sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;

if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1) != HAL_OK)

{

Error_Handler();

}

}

static void MX_TIM6_Init(void)

{

TIM_MasterConfigTypeDef sMasterConfig = {0};

htim6.Instance = TIM6;

htim6.Init.Prescaler = 0;

htim6.Init.CounterMode = TIM_COUNTERMODE_UP;

htim6.Init.Period = 3999;

htim6.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;

if (HAL_TIM_Base_Init(&htim6) != HAL_OK)

{

Error_Handler();

}

sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;

sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;

if (HAL_TIMEx_MasterConfigSynchronization(&htim6, &sMasterConfig) != HAL_OK)

{

Error_Handler();

}

}

static void MX_USART2_UART_Init(void)

{

huart2.Instance = USART2;

huart2.Init.BaudRate = 115200;

huart2.Init.WordLength = UART_WORDLENGTH_8B;

huart2.Init.StopBits = UART_STOPBITS_1;

huart2.Init.Parity = UART_PARITY_NONE;

huart2.Init.Mode = UART_MODE_TX_RX;

huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;

huart2.Init.OverSampling = UART_OVERSAMPLING_16;

if (HAL_UART_Init(&huart2) != HAL_OK)

{

Error_Handler();

}

/* USER CODE BEGIN USART2_Init 2 */



/* USER CODE END USART2_Init 2 */



}

static void MX_DMA_Init(void)

{

__HAL_RCC_DMA1_CLK_ENABLE();

HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);

HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);

/* DMA1_Channel2_IRQn interrupt configuration */

HAL_NVIC_SetPriority(DMA1_Channel2_IRQn, 0, 0);

HAL_NVIC_EnableIRQ(DMA1_Channel2_IRQn);

}

static void MX_GPIO_Init(void)

{

GPIO_InitTypeDef GPIO_InitStruct = {0};

__HAL_RCC_GPIOC_CLK_ENABLE();

__HAL_RCC_GPIOH_CLK_ENABLE();

__HAL_RCC_GPIOA_CLK_ENABLE();

__HAL_RCC_GPIOB_CLK_ENABLE();

GPIO_InitStruct.Pin = B1_Pin;

GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;

GPIO_InitStruct.Pull = GPIO_NOPULL;

HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);

}

void print_adc_values(void) {

char uart_message[50];

for (int i = 0; i < BLOCK_SIZE; i++) {

snprintf(uart_message, sizeof(uart_message), "ADC Value [%d]: %u\r\n", i, adc_buffer[i]);

HAL_UART_Transmit(&huart2, (uint8_t*)uart_message, strlen(uart_message), HAL_MAX_DELAY);

}

}

/* USER CODE BEGIN 4 */

double goertzel(const short* samples, int num_samples, double target_freq, double sample_rate) {

// Implementation of the Goertzel algorithm



double k = (int)(0.5 + ((num_samples * target_freq) / sample_rate));

double omega = (2.0 * PI * k) / num_samples;



double cosine = cos(omega);

double coeff = 2.0 * cosine;

double q0 = 0.0, q1 = 0.0, q2 = 0.0;



for (int i = 0; i < num_samples; i++) {

q0 = coeff * q1 - q2 + samples[i];

q2 = q1;

q1 = q0;

}



return q1 * q1 + q2 * q2 - q1 * q2 * coeff;

}



char detect_tone(const short* samples, int num_samples) {

strcpy(message5, "tone \n \r");

HAL_UART_Transmit(&huart2,(uint8_t*)message5,sizeof(message5),100);

double power[8];

double max_low_power = 0.0;

double max_high_power = 0.0;

int max_low_index = -1;

int max_high_index = -1;



// Compute power for each DTMF frequency

for (int i = 0; i < num_freqs; i++)

{

power[i] = goertzel(samples, num_samples, dtmf_freqs[i], SAMPLE_RATE);



if (i < 4)

{

// Low frequency group

if (power[i] > max_low_power)

{

max_low_power = power[i];

max_low_index = i;

}

}

else

{

// High frequency group

if (power[i] > max_high_power)

{

max_high_power = power[i];

max_high_index = i - 4;

}

}

}



// Validate detected tone

if (max_low_index != -1 && max_high_index != -1)

{

return dtmf_keys[max_low_index][max_high_index];

}



return '\0'; // No valid tone detected

}



void execute_command(char tone) {

char message[40] = {'\0'};

switch (tone) {



case 'A':



strcpy(message, "antennas deployed \n \r");

HAL_UART_Transmit(&huart2,(uint8_t*)message,sizeof(message),100);



// UART to terminal "deploy antenna"

break;

case 'B':

char message2[40] = {'\0'};

strcpy(message2, "power savings mode activated \n \r");

HAL_UART_Transmit(&huart2,(uint8_t*)message2,sizeof(message),100);



//UART to terminal "power"

break;



case '5':

char message4[40] = {'\0'};

strcpy(message4, "TEST \n \r");

HAL_UART_Transmit(&huart2,(uint8_t*)message4,sizeof(message),100);

// Handle other cases

break;

default:

char message3[40] = {'\0'};

strcpy(message3, "DTMF tone detected. no command \n \r");

HAL_UART_Transmit(&huart2,(uint8_t*)message3,sizeof(message),100);

char uart_message[50];

snprintf(uart_message, sizeof(uart_message), "Detected tone: %c\r\n", tone);

HAL_UART_Transmit(&huart2, (uint8_t*)uart_message, strlen(uart_message), 100);

break;

}

// Implement actions based on the detected tone

}

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)//keep

{

dataReady = 1;



}





* @brief This function is executed in case of error occurrence.

* @retval None

*/

void Error_Handler(void)

{

/* USER CODE BEGIN Error_Handler_Debug */

/* User can add his own implementation to report the HAL error return state */

__disable_irq();

while (1)

{

}

/* USER CODE END Error_Handler_Debug */

}



#ifdef USE_FULL_ASSERT



void assert_failed(uint8_t *file, uint32_t line)

{



/* USER CODE END 6 */

}

#endif /* USE_FULL_ASSERT */

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