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#include "blue.h"
void Bluetooth_Init(uint32_t baudRate)
{
// 1. 時鐘使能
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
// 2. 引腳復(fù)用映射
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART1);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1);
// 3. GPIO配置
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// 4. USART配置
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = baudRate;
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(USART1, &USART_InitStructure);
// 5. 中斷配置 (NVIC)
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00; // 搶占優(yōu)先級
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01; // 子優(yōu)先級
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
// 使能接收中斷
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
// 6. 使能串口
USART_Cmd(USART1, ENABLE);
}
/*
單字節(jié)發(fā)送函數(shù)
*/
void Bluetooth_SendByte(uint8_t byte)
{
while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
USART_SendData(USART1, byte);
}
/**
* @brief USART1 中斷服務(wù)函數(shù)
*/
void USART1_IRQHandler(void)
{
uint8_t data;
if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
data = USART_ReceiveData(USART1); // 讀取收到的數(shù)字/字符
// 核心邏輯：加一操作
data = data + 1;
Bluetooth_SendByte(data); // 回傳結(jié)果
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
}
}
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