289 lines
7.2 KiB
C++
289 lines
7.2 KiB
C++
#include "Pin_STM32F0.h"
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#include <stdio.h>
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#include "Port.h"
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#include "SerialPort.h"
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// 默认波特率
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#define USART_DEFAULT_BAUDRATE 115200
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static USART_TypeDef* g_Uart_Ports[] = UARTS;
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static const Pin g_Uart_Pins[] = UART_PINS;
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static const Pin g_Uart_Pins_Map[] = UART_PINS_FULLREMAP;
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#ifdef STM32F1XX
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// 串口接收委托
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static SerialPortReadHandler UsartHandlers[6] = {0, 0, 0, 0, 0, 0};
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#else
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static SerialPortReadHandler UsartHandlers[2] = {0, 0}; //只有2个串口
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#endif
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SerialPort::SerialPort(int com, int baudRate, int parity, int dataBits, int stopBits)
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{
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_com = com;
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_baudRate = baudRate;
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_parity = parity;
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_dataBits = dataBits;
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_stopBits = stopBits;
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}
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// 析构时自动关闭
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SerialPort::~SerialPort()
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{
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Close();
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}
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// 打开串口
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void SerialPort::Open()
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{
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if(Opened) return;
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USART_InitTypeDef p;
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Pin rx;
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Pin tx;
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NVIC_InitTypeDef NVIC_InitStructure;
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GetPins(&tx, &rx);
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USART_DeInit(_port);
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// 检查重映射
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#ifdef STM32F1XX
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if(IsRemap)
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{
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switch (_com) {
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case 0: AFIO->MAPR |= AFIO_MAPR_USART1_REMAP; break;
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case 1: AFIO->MAPR |= AFIO_MAPR_USART2_REMAP; break;
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case 2: AFIO->MAPR |= AFIO_MAPR_USART3_REMAP_FULLREMAP; break;
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}
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}
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE );
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#endif
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// 打开 UART 时钟。必须先打开串口时钟，才配置引脚
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#ifdef STM32F0XX
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switch(_com)
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{
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case COM1: RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); break;//开启时钟
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case COM2: RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); break;
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default: break;
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}
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#else
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if (_com) { // COM2-5 on APB1
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RCC->APB1ENR |= RCC_APB1ENR_USART2EN >> 1 << _com;
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} else { // COM1 on APB2
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RCC->APB2ENR |= RCC_APB2ENR_USART1EN;
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}
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#endif
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//串口引脚初始化
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#ifdef STM32F0XX
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//Sys.IO.OpenPort(tx, GPIO_Mode_AF, GPIO_Speed_10MHz, GPIO_OType_PP,GPIO_PuPd_NOPULL);
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//Sys.IO.OpenPort(rx, GPIO_Mode_AF, GPIO_Speed_10MHz, GPIO_OType_PP,GPIO_PuPd_NOPULL);
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Port::SetAlternate(tx, false, Port::Speed_10MHz);
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Port::SetInput(rx, true); //TX RX COM AF
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//PA2 PA3 COM2 AF1
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//PA9 PA10 COM1 AF1
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//PA14 PA15 COM2 AF1
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//PB6 PB7 COM1 AF0
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GPIO_PinAFConfig(_GROUP(tx), _PIN(tx), GPIO_AF_1);//将IO口映射为USART接口
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GPIO_PinAFConfig(_GROUP(rx), _PIN(rx), GPIO_AF_1);
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#else
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//Sys.IO.OpenPort(tx, GPIO_Mode_AF_PP, GPIO_Speed_50MHz);
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//Sys.IO.Open(rx, GPIO_Mode_IN_FLOATING);
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Port::SetAlternate(tx, false, Port::Speed_50MHz);
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Port::SetInput(rx, true);
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#endif
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USART_StructInit(&p);
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p.USART_BaudRate = _baudRate;
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p.USART_WordLength = _dataBits;
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p.USART_StopBits = _stopBits;
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p.USART_Parity = _parity;
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USART_Init(_port, &p);
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USART_ITConfig(_port, USART_IT_RXNE, ENABLE);//串口接收中断配置
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/* Configure the NVIC Preemption Priority Bits */
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//#ifdef STM32F10X //全局设置 放到system.c里面
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// NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
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//#endif
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if(_com==COM1)
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NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
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else
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NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
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#ifdef STM32F10X
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0xff;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0xff;
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#else
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NVIC_InitStructure.NVIC_IRQChannelPriority = 0x01;
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#endif
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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switch (_com) {
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case 0: NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; break;
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case 1: NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; break;
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#if STM32F10x
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// case 1: NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; break;
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case 2: NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; break;
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case 3: NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn; break;
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case 4: NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn; break;
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#endif
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}
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NVIC_Init(&NVIC_InitStructure);
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USART_Cmd(_port, ENABLE);//使能串口
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Opened = true;
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}
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// 关闭端口
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void SerialPort::Close()
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{
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if(!Opened) return;
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Pin tx, rx;
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GetPins(&tx, &rx);
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USART_DeInit(_port);
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//Sys.IO.Close(tx);
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//Sys.IO.Close(rx);
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Port::SetAlternate(tx);
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Port::SetAlternate(rx);
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// 检查重映射
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#ifdef STM32F1XX
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if(IsRemap)
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{
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switch (_com) {
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case 0: AFIO->MAPR &= ~AFIO_MAPR_USART1_REMAP; break;
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case 1: AFIO->MAPR &= ~AFIO_MAPR_USART2_REMAP; break;
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case 2: AFIO->MAPR &= ~AFIO_MAPR_USART3_REMAP_FULLREMAP; break;
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}
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}
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#endif
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// 清空接收委托
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Register(0);
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Opened = false;
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}
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// 发送单一字节数据
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void TUsart_SendData(USART_TypeDef* port, char* data)
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{
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//USART_SendData(port, (ushort)*data);
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while(USART_GetFlagStatus(port, USART_FLAG_TXE) == RESET);//等待发送完毕
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USART_SendData(port, (ushort)*data);
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}
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// 向某个端口写入数据。如果size为0，则把data当作字符串，一直发送直到遇到\0为止
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void SerialPort::Write(const string data, int size)
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{
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int i;
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string byte = data;
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Open();
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if(size > 0)
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{
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for(i=0; i<size; i++) TUsart_SendData(_port, byte++);
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}
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else
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{
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while(*byte) TUsart_SendData(_port, byte++);
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}
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}
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// 从某个端口读取数据
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int SerialPort::Read(string data, uint size)
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{
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Open();
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return 0;
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}
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// 刷出某个端口中的数据
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void SerialPort::Flush()
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{
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USART_TypeDef* port = g_Uart_Ports[_com];
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while(USART_GetFlagStatus(port, USART_FLAG_TXE) == RESET);//等待发送完毕
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}
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void SerialPort::Register(SerialPortReadHandler handler)
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{
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if(handler)
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UsartHandlers[_com] = handler;
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else
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UsartHandlers[_com] = 0;
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}
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// 真正的串口中断函数
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void OnReceive(int _com)
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{
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USART_TypeDef* port = g_Uart_Ports[_com];
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if(USART_GetITStatus(port, USART_IT_RXNE) != RESET)
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{
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#ifdef STM32F10X
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if(UsartHandlers[_com]) UsartHandlers[_com]((byte)port->DR);
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#else
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if(UsartHandlers[_com]) UsartHandlers[_com]((byte)port->RDR);
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#endif
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}
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}
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//所有中断重映射到onreceive函数
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void USART1_IRQHandler(void) { OnReceive(0); }
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void USART2_IRQHandler(void) { OnReceive(1); }
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#ifdef STM32F10X
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void USART3_IRQHandler(void) { OnReceive(2); }
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void USART4_IRQHandler(void) { OnReceive(3); }
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void USART5_IRQHandler(void) { OnReceive(4); }
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#endif
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// 获取引脚
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void SerialPort::GetPins(Pin* txPin, Pin* rxPin)
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{
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const Pin* p;
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*rxPin = *txPin = P0;
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p = g_Uart_Pins;
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if(IsRemap) p = g_Uart_Pins_Map;
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_com = _com << 2;
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*txPin = p[_com];
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*rxPin = p[_com + 1];
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}
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extern "C"
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{
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/* 重载fputc可以让用户程序使用printf函数 */
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int fputc(int ch, FILE *f)
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{
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int _com = Sys.MessagePort;
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if(_com == COM_NONE) return ch;
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USART_TypeDef* port = g_Uart_Ports[_com];
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//while(!((port->ISR)&(1<<6)));//等待缓冲为空
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//port->TDR = (byte) ch;
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//USART_SendData(port, (unsigned char) ch);
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#ifdef STM32F0XX
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//while(!((port->ISR)&(1<<6)));//等待缓冲为空
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#else
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//while (!(port->SR & USART_FLAG_TXE));
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#endif
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//USART_SendData(port, (unsigned char) ch);
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TUsart_SendData(port, (char*)&ch);
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return ch;
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}
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}
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