/******************** (C) COPYRIGHT 2023 GeekRebot ***************************** * File Name : bluetooth.c * Current Version : V1.0 & ST 3.5.0 * Author : zhanli 719901725@qq.com * Date of Issued : 2023.04.06 zhanli: Create * Comments : GeekRebot 蓝牙驱动模块,使用HC05蓝牙模块，串口透传功能， 和使用串口差不多，使用stm32 的uart2。蓝牙模块只需要接四 个接口，TXD，RXD，5V，GND 1. PA2 -> 蓝牙RXD 2.PA3 -> 蓝牙TXD ********************************************************************************/ #include "stdarg.h" #include "stdio.h" #include "bluetooth.h" #include volatile unsigned char *rx2_address; volatile unsigned int rx2_count; volatile unsigned int rx2_length; /**---------------------------------------------------------------------- * Function : Bluetooth_Init * Description : 串口1初始化函数,PA2->RXD, PA3->TXD, bound为设置波特率 * Author : zhanli&719901725@qq.com * Date : 2023/05/20 zhanli *---------------------------------------------------------------------**/ void Bluetooth_Init(u32 bound) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; /* Config USART2 clock */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); /* USART2 GPIO config */ /* Configure USART2 Tx (PA.02) as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); /* Configure USART2 Rx (PA.03) as input floating */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); /* USART2 mode config */ USART_InitStructure.USART_BaudRate = bound; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No ; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_Init(USART2, &USART_InitStructure); /* Configure the NVIC Preemption Priority Bits */ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); /* Enable the USARTy Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); /* 使能串口1接收中断 */ USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); USART_Cmd(USART2, ENABLE); } /**---------------------------------------------------------------------- * Function : USART2_Send * Description : 蓝牙通过USART2发送到手机 * Author : zhanli&719901725@qq.com * Date : 2023/05/20 zhanli *---------------------------------------------------------------------**/ void USART2_Send(unsigned char *tx_buf, int len) { USART_ClearFlag(USART2, USART_FLAG_TC); USART_ClearITPendingBit(USART2, USART_FLAG_TXE); while(len--) { USART_SendData(USART2, *tx_buf); while(USART_GetFlagStatus(USART2, USART_FLAG_TC) != 1); USART_ClearFlag(USART2, USART_FLAG_TC); USART_ClearITPendingBit(USART2, USART_FLAG_TXE); tx_buf++; } } /**---------------------------------------------------------------------- * Function : USART2_Send * Description : 蓝牙通过USART2发送到手机 * Author : zhanli&719901725@qq.com * Date : 2023/05/20 zhanli *---------------------------------------------------------------------**/ void USART2_SendStr(unsigned char *tx_buf) { USART_ClearFlag(USART2, USART_FLAG_TC); USART_ClearITPendingBit(USART2, USART_FLAG_TXE); while(*tx_buf != 0) { USART_SendData(USART2, *tx_buf++); while(USART_GetFlagStatus(USART2, USART_FLAG_TC) != 1); USART_ClearFlag(USART2, USART_FLAG_TC); USART_ClearITPendingBit(USART2, USART_FLAG_TXE); } } static char *itoa(int value, char *string, int radix) { int i, d; int flag = 0; char *ptr = string; /* This implementation only works for decimal numbers. */ if (radix != 10) { *ptr = 0; return string; } if (!value) { *ptr++ = 0x30; *ptr = 0; return string; } /* if this is a negative value insert the minus sign. */ if (value < 0) { *ptr++ = '-'; /* Make the value positive. */ value *= -1; } for (i = 10000; i > 0; i /= 10) { d = value / i; if (d || flag) { *ptr++ = (char)(d + 0x30); value -= (d * i); flag = 1; } } /* Null terminate the string. */ *ptr = 0; return string; } /* NCL_Itoa */ void PB_USART_printf(USART_TypeDef* USARTx, uint8_t *Data,...) { const char *s; int d; char buf[18]; va_list ap; va_start(ap, Data); USART_ClearFlag(USART2, USART_FLAG_TC); USART_ClearITPendingBit(USART2, USART_FLAG_TXE); while ( *Data != 0) { if ( *Data == 0x5c ) //'\' { switch ( *++Data ) { case 'r': USART_SendData(USARTx, 0x0d); Data ++; break; case 'n': USART_SendData(USARTx, 0x0a); Data ++; break; default: Data ++; break; } } else if ( *Data == '%') { switch ( *++Data ) { case 's': s = va_arg(ap, const char *); for ( ; *s; s++) { USART_SendData(USARTx,*s); while( USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET ); } Data++; break; case 'd': d = va_arg(ap, int); itoa(d, buf, 10); for (s = buf; *s; s++) { USART_SendData(USARTx,*s); while( USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET ); } Data++; break; default: Data++; break; } } /* end of else if */ else { USART_SendData(USARTx, *Data++); } while(USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET ); USART_ClearFlag(USART2, USART_FLAG_TC); USART_ClearITPendingBit(USART2, USART_FLAG_TXE); } } /**---------------------------------------------------------------------- * Function : USART2_Receive * Description : 蓝牙接受，从手机接收 * Author : zhanli&719901725@qq.com * Date : 2023/05/20 zhanli *---------------------------------------------------------------------**/ void USART2_Receive(unsigned char *rx_buf, int len) { rx2_count = 0; rx2_length = len; rx2_address = rx_buf; } /**---------------------------------------------------------------------- * Function : USART2_Receive * Description : 串口2中断函数 * Author : zhanli&719901725@qq.com * Date : 2023/05/20 zhanli *---------------------------------------------------------------------**/ void USART2_IRQHandler(void) { unsigned char Res; // 接收中断(接收到的数据必须是0x0d 0x0a结尾) if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) { Res = USART_ReceiveData(USART2); if(rx2_length > rx2_count) { *rx2_address = Res; rx2_address++; rx2_count++; } USART_ClearITPendingBit(USART2, USART_IT_RXNE); } }