Hello st community,
I'm trying to set up a bleutooth communication between my phone and my stm32 with the Adafruit module in SPI communication, but I'm having a problem.
When I use my arduino and the demo code it works perfectly but when I connect to my stm32 and do my code based on the demo code I have a problem during the factory reset, the module shuts down and I can't see the ble module on my phone.
I have checked my wires 3 times and also the power supply provided by the nucleo I have the 3.3V
I use doclight to monitor uart communication for debugging
You will find my code below:
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdlib.h"
#include "stdio.h"
#include <string.h>
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
#define SPI_CS_PIN GPIO_PIN_8
#define SPI_CS_PORT GPIOB
#define SPI_IRQ_PIN GPIO_PIN_7
#define SPI_IRQ_PORT GPIOB
#define SPI_RST_PIN GPIO_PIN_6
#define SPI_RST_PORT GPIOB
#define BUFSIZE 128
#define VERBOSE_MODE 1
#define BLE_READPACKET_TIMEOUT 500
#define FACTORYRESET_ENABLE 1
#define BLUEFRUIT_CMD_TIMEOUT 1000
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
SPI_HandleTypeDef hspi2;
UART_HandleTypeDef huart2;
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);
static void MX_SPI2_Init(void);
/* USER CODE BEGIN PFP */
uint8_t ble_begin(void);
uint8_t ble_factoryReset(void);
void ble_echo(uint8_t enable);
void ble_info(void);
uint8_t sendCommand(const char* cmd, char* response, uint16_t timeout);
void UART_Print(UART_HandleTypeDef *huart, const char *str);
void printHex(const uint8_t *data, const uint32_t numBytes);
uint8_t readPacket(uint16_t timeout);
uint8_t packetbuffer[BUFSIZE];
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
void UART_SendBuffer(uint8_t *buffer, uint16_t size){
HAL_UART_Transmit(&huart2, buffer, size, HAL_MAX_DELAY);
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART2_UART_Init();
MX_SPI2_Init();
/* USER CODE BEGIN 2 */
UART_Print(&huart2, "Adafruit Bluefruit Command Mode Example\n");
UART_Print(&huart2, "---------------------------------------\n");
UART_Print(&huart2, "Starting ble_begin...\n");
if (!ble_begin())
{
UART_Print(&huart2, "Couldn't find Bluefruit, make sure it's in Command mode & check wiring?\n");
while (1);
}
UART_Print(&huart2, "OK!\n");
if (FACTORYRESET_ENABLE)
{
UART_Print(&huart2, "Starting factory reset...\n");
if (!ble_factoryReset())
{
UART_Print(&huart2, "Couldn't factory reset\n");
while (1);
}
UART_Print(&huart2, "Factory reset complete\n");
HAL_Delay(2000); // Allow the module to restart
}
UART_Print(&huart2, "Disabling echo...\n");
ble_echo(0);
UART_Print(&huart2, "Echo disabled\n");
UART_Print(&huart2, "Requesting Bluefruit info:\n");
ble_info();
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
UART_Print(&huart2, "Reading packet...\n");
uint8_t len = readPacket(BLE_READPACKET_TIMEOUT);
if (len > 0)
{
UART_Print(&huart2, "Received packet: ");
printHex(packetbuffer, len);
}
HAL_Delay(1000);
}
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
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.PLLM = 16;
RCC_OscInitStruct.PLL.PLLN = 100;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
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_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief SPI2 Initialization Function
* @PAram None
* @retval None
*/
static void MX_SPI2_Init(void)
{
/* USER CODE BEGIN SPI2_Init 0 */
/* USER CODE END SPI2_Init 0 */
/* USER CODE BEGIN SPI2_Init 1 */
/* USER CODE END SPI2_Init 1 */
/* SPI2 parameter configuration*/
hspi2.Instance = SPI2;
hspi2.Init.Mode = SPI_MODE_MASTER;
hspi2.Init.Direction = SPI_DIRECTION_2LINES;
hspi2.Init.DataSize = SPI_DATASIZE_8BIT;
hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi2.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi2.Init.NSS = SPI_NSS_SOFT;
hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi2.Init.CRCPolynomial = 10;
if (HAL_SPI_Init(&hspi2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SPI2_Init 2 */
/* USER CODE END SPI2_Init 2 */
}
/**
* @brief USART2 Initialization Function
* @PAram None
* @retval None
*/
static void MX_USART2_UART_Init(void)
{
/* USER CODE BEGIN USART2_Init 0 */
/* USER CODE END USART2_Init 0 */
/* USER CODE BEGIN USART2_Init 1 */
/* USER CODE END USART2_Init 1 */
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 */
}
/**
* @brief GPIO Initialization Function
* @PAram None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOB, SPI_RST_Pin|SPI_CS_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin : B1_Pin */
GPIO_InitStruct.Pin = B1_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin : LD2_Pin */
GPIO_InitStruct.Pin = LD2_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pins : SPI_RST_Pin SPI_CS_Pin */
GPIO_InitStruct.Pin = SPI_RST_Pin|SPI_CS_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/*Configure GPIO pin : SPI_IRQ_Pin */
GPIO_InitStruct.Pin = SPI_IRQ_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(SPI_IRQ_GPIO_Port, &GPIO_InitStruct);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
uint8_t ble_begin(void)
{
UART_Print(&huart2, "Initializing SPI communication...\n");
HAL_GPIO_WritePin(SPI_CS_PORT, SPI_CS_PIN, GPIO_PIN_RESET);
// Add SPI initialization code here if necessary
HAL_GPIO_WritePin(SPI_CS_PORT, SPI_CS_PIN, GPIO_PIN_SET);
UART_Print(&huart2, "SPI communication initialized.\n");
return 1; // Return 1 for success, 0 for failure
}
uint8_t ble_factoryReset(void)
{
char response[BUFSIZE];
if (sendCommand("AT+FACTORYRESET", response, BLUEFRUIT_CMD_TIMEOUT))
{
UART_Print(&huart2, "Factory Reset Response: ");
UART_Print(&huart2, response);
UART_Print(&huart2, "\n");
return 1; // Success
}
else
{
UART_Print(&huart2, "Factory Reset Timeout or Error\n");
return 0; // Failure
}
}
void ble_echo(uint8_t enable)
{
char response[BUFSIZE];
if (enable)
{
sendCommand("ATE=1", response, BLUEFRUIT_CMD_TIMEOUT);
}
else
{
sendCommand("ATE=0", response, BLUEFRUIT_CMD_TIMEOUT);
}
UART_Print(&huart2, "Echo Response: ");
UART_Print(&huart2, response);
UART_Print(&huart2, "\n");
}
void ble_info(void)
{
char response[BUFSIZE];
if (sendCommand("ATI", response, BLUEFRUIT_CMD_TIMEOUT))
{
UART_Print(&huart2, "Module Info: ");
UART_Print(&huart2, response);
UART_Print(&huart2, "\n");
}
else
{
UART_Print(&huart2, "Info Command Timeout or Error\n");
}
}
uint8_t sendCommand(const char* cmd, char* response, uint16_t timeout)
{
UART_Print(&huart2, "Sending command: ");
UART_Print(&huart2, cmd);
UART_Print(&huart2, "\n");
uint8_t cmdLength = strlen(cmd);
HAL_GPIO_WritePin(SPI_CS_PORT, SPI_CS_PIN, GPIO_PIN_RESET);
for (uint8_t i = 0; i < cmdLength; i++)
{
if (HAL_SPI_Transmit(&hspi2, (uint8_t*)&cmd[i], 1, HAL_MAX_DELAY) != HAL_OK)
{
UART_Print(&huart2, "SPI Transmit Error\n");
}
}
uint8_t newline = '\n';
if (HAL_SPI_Transmit(&hspi2, &newline, 1, HAL_MAX_DELAY) != HAL_OK)
{
UART_Print(&huart2, "SPI Transmit Error\n");
}
HAL_GPIO_WritePin(SPI_CS_PORT, SPI_CS_PIN, GPIO_PIN_SET);
UART_Print(&huart2, "Command sent, waiting for response...\n");
uint32_t startTick = HAL_GetTick();
uint8_t index = 0;
while ((HAL_GetTick() - startTick) < timeout)
{
uint8_t byte;
if (HAL_SPI_Receive(&hspi2, &byte, 1, HAL_MAX_DELAY) == HAL_OK)
{
response[index++] = byte;
if (byte == '\n')
{
response[index] = '\0';
UART_Print(&huart2, "Received response: ");
UART_Print(&huart2, response);
UART_Print(&huart2, "\n");
return 1; // Success
}
}
}
response[index] = '\0';
UART_Print(&huart2, "Response Timeout\n");
return 0; // Timeout or failure
}
void UART_Print(UART_HandleTypeDef *huart, const char *str)
{
HAL_UART_Transmit(huart, (uint8_t*)str, strlen(str), HAL_MAX_DELAY);
}
void printHex(const uint8_t *data, const uint32_t numBytes)
{
char buffer[3];
for (uint32_t i = 0; i < numBytes; i++)
{
snprintf(buffer, sizeof(buffer), "%02X ", data[i]);
UART_Print(&huart2, buffer);
}
UART_Print(&huart2, "\n");
}
uint8_t readPacket(uint16_t timeout)
{
UART_Print(&huart2, "Reading packet...\n");
uint16_t origtimeout = timeout, replyidx = 0;
uint8_t packetbuffer[BUFSIZE] = {0};
while (timeout--)
{
if (replyidx >= 20) break;
if((packetbuffer[1] == 'B') && replyidx == PACKET_BUTTON_LEN)
break;
uint8_t byte;
HAL_StatusTypeDef status = HAL_SPI_Receive(&hspi2, &byte, 1, HAL_MAX_DELAY);
if (status == HAL_OK)
{
if (byte == '!')
{
replyidx = 0;
}
packetbuffer[replyidx++] = byte;
timeout = origtimeout; // Reset timeout after receiving a byte
// If a newline character is received, end of packet
if (byte == '\n')
{
break;
}
}
if (timeout == 0) break;
HAL_Delay(1); // Delay to prevent CPU overload
}
packetbuffer[replyidx] = 0;
if (!replyidx) return 0;
if (packetbuffer[0] != '!') return 0;
uint8_t xsum = 0;
uint8_t checksum = packetbuffer[replyidx - 1];
for (uint8_t i = 0; i < replyidx - 1; i++)
{
xsum += packetbuffer[i];
}
xsum = ~xsum;
if (xsum != checksum)
{
UART_Print(&huart2, "Checksum mismatch in packet: ");
printHex((const uint8_t *)packetbuffer, replyidx);
return 0;
}
return replyidx;
}
/* USER CODE END 4 */
/**
* @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
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @PAram file: pointer to the source file name
* @PAram line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
I want to send a data frame from my phone (like pressing a button) and receive data back to my phone (like ‘button 6 is pressed’) with the Bluetooth module.
