下面USART初始化代码:
/* 初始化指定的UART */
void Console_Uart_Init(int num) {
GPIO_InitType GPIO_InitStructure;
USART_InitType USART_InitStructure;
NVIC_InitType NVIC_InitStructure;
if(num == 1) {
//打开串口1所在的IO口时钟
RCC_APB2PeriphClockCmd(RCC_APB2PERIPH_GPIOA|RCC_APB2PERIPH_AFIO , ENABLE);
//打开串口1时钟
RCC_APB2PeriphClockCmd(RCC_APB2PERIPH_USART1, ENABLE);
//USART1端口配置
GPIO_PinsRemapConfig(GPIO_Remap_USART1, DISABLE);//使用原始位置
//RX
GPIO_InitStructure.GPIO_Pins = GPIO_Pins_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_PU;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//TX
GPIO_InitStructure.GPIO_Pins = GPIO_Pins_9;
GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
} else if(num == 3) {
//打开串口所在的IO口时钟
RCC_APB2PeriphClockCmd(RCC_APB2PERIPH_GPIOD|RCC_APB2PERIPH_AFIO , ENABLE);
//打开串口时钟
RCC_APB1PeriphClockCmd(RCC_APB1PERIPH_USART3, ENABLE);
//USART3端口配置
GPIO_PinsRemapConfig(GPIO_FullRemap_USART3, ENABLE);//重映射,问题? PD10 11 12能用普通作IO吗?实际测试可以!
//RX
GPIO_InitStructure.GPIO_Pins = GPIO_Pins_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_PU;//注:此处要上拉,不然很可能出问题。
GPIO_Init(GPIOD, &GPIO_InitStructure);
//TX
GPIO_InitStructure.GPIO_Pins = GPIO_Pins_8;
GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
} else if(num == 6) {
//打开串口6所在的IO口时钟
RCC_APB2PeriphClockCmd(RCC_APB2PERIPH_GPIOC|RCC_APB2PERIPH_AFIO , ENABLE);
//打开串口时钟
RCC_APB1PeriphClockCmd(RCC_APB2PERIPH_USART6, ENABLE);
// //USART6端口配置
//??? GPIO_PinsRemapConfig(GPIO_Remap_USART6, ENABLE);//重映射,问题?
//RX
GPIO_InitStructure.GPIO_Pins = GPIO_Pins_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_PU; //
GPIO_Init(GPIOC, &GPIO_InitStructure);
//TX
GPIO_InitStructure.GPIO_Pins = GPIO_Pins_6;
GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
// USART初始化设置
// 波特率设置
// USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_BaudRate = 57600;
// 字长为8位数据格式
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
// 一个停止位
USART_InitStructure.USART_StopBits = USART_StopBits_1;//break;
// USART_InitStructure.USART_StopBits = USART_StopBits_0_5;break;
USART_InitStructure.USART_Parity = USART_Parity_No;
// USART_InitStructure.USART_Parity = USART_Parity_Even;
//todo
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
if(num == 1) {
USART_Init(USART1, &USART_InitStructure); //初始化串口1
USART_Cmd(USART1, ENABLE); //使能串口1
//打开收非空中断
USART_INTConfig(USART1, USART_INT_RDNE, ENABLE);
// USART_INTConfig(USART1, USART_INT_IDLEF, ENABLE);
//Usart1 NVIC 配置
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//串口1中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=10;//抢占优先级10
NVIC_InitStructure.NVIC_IRQChannelSubPriority =0; //子优先级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
} else if(num == 3) {
USART_Init(USART3, &USART_InitStructure); //初始化串口
USART_Cmd(USART3, ENABLE); //使能串口
//打开收非空中断
// USART_INTConfig(USART3, USART_INT_RDNE, ENABLE);
//USART_INTConfig(USART1, USART_INT_IDLEF, ENABLE);
//Usart1 NVIC 配置
// NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;//串口1中断通道
// NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=10;//抢占优先级10
// NVIC_InitStructure.NVIC_IRQChannelSubPriority =0; //子优先级
// NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
// NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
} else if(num == 6) {
USART_Init(USART6, &USART_InitStructure); //初始化串口
USART_Cmd(USART6, ENABLE); //使能串口
//打开收非空中断
USART_INTConfig(USART6, USART_INT_RDNE, ENABLE);
// USART_INTConfig(USART6, USART_INT_IDLEF, ENABLE);
//Usart1 NVIC 配置
NVIC_InitStructure.NVIC_IRQChannel = USART6_IRQn;//串口6中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=10;//抢占优先级10
NVIC_InitStructure.NVIC_IRQChannelSubPriority =1; //子优先级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
}
}
移植了freeRTOS
代码中关于USART6重映射IO的部分出错, 硬件是单独使用PC6\PC7的,没有占用
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