1. Connect the bluetooth module(HC-06) and the MCU. For using USART1, select PA9(TX) and PA10(RX).
2. Search and add the bluetooth named "HC-06(n)". (n = 01, 02, ... )
3. Enter the password "1234".
4. If it's connected normally, you can connect the serial port with Teraterm.
/**
******************************************************************************
* @author SSSLAB
* @Mod 2023-11-10 by YKKIM
* @brief Embedded Controller: Tutorial - USART communication (Bluetooth)
*
******************************************************************************
*/
#include "stm32f4xx.h"
#include "ecGPIO.h"
#include "ecRCC.h"
#include "ecUART.h"
#define END_CHAR 13
#define MAX_BUF 100
uint8_t pcData = 0;
uint8_t btData = 0;
uint8_t buffer[MAX_BUF] = {0, };
int bReceive = 0;
int idx = 0;
void setup(void);
int main(void) {
// Initialiization --------------------------------------------------------
setup();
printf("Hello Nucleo\r\n");
USART_write(USART1,(uint8_t*) "Hello bluetooth\r\n",17);
// Inifinite Loop ----------------------------------------------------------
while (1){
}
}
// Initialiization
void setup(void)
{
RCC_PLL_init();
UART2_init();
UART2_baud(BAUD_38400);
UART1_init();
UART1_baud(BAUD_9600);
}
void USART1_IRQHandler(){ //USART1 INT
if(is_USART_RXNE(USART1)){
btData = USART_read(USART1);
USART_write(USART1,(uint8_t*) "BT sent : ", 10);
USART_write(USART1, &btData, 1);
USART_write(USART1, "\r\n", 2);
printf("NUCLEO got : %c (from BT)\r\n",btData);
}
}
void USART2_IRQHandler(){ //USART2 INT
if(is_USART_RXNE(USART2)){
pcData = USART_read(USART2);
USART_write(USART1, &pcData, 1);
//printf("Nucleo got : %c \r\rn", pcData);
printf("%c", pcData);
if (pcData == END_CHAR)
printf("\r\n");
}
}
