280 lines
7.4 KiB
C++
280 lines
7.4 KiB
C++
#include "Sys.h"
|
||
#include "Task.h"
|
||
|
||
#include "SerialPort.h"
|
||
|
||
#include "Platform\stm32.h"
|
||
|
||
#define COM_DEBUG 0
|
||
|
||
const byte uart_irqs[] = UART_IRQs;
|
||
|
||
void SerialPort::OnInit()
|
||
{
|
||
_parity = USART_Parity_No;
|
||
_dataBits = USART_WordLength_8b;
|
||
_stopBits = USART_StopBits_1;
|
||
}
|
||
|
||
bool SerialPort::OnSet()
|
||
{
|
||
USART_TypeDef* const g_Uart_Ports[] = UARTS;
|
||
assert_param(_index < ArrayLength(g_Uart_Ports));
|
||
|
||
auto sp = g_Uart_Ports[_index];
|
||
_port = sp;
|
||
|
||
// 根据端口实际情况决定打开状态
|
||
return sp->CR1 & USART_CR1_UE;
|
||
}
|
||
|
||
// 打开串口
|
||
void SerialPort::OnOpen2()
|
||
{
|
||
Pin rx, tx;
|
||
GetPins(&tx, &rx);
|
||
|
||
//串口引脚初始化
|
||
_tx.Set(tx).Open();
|
||
_rx.Init(rx, false).Open();
|
||
|
||
auto st = (USART_TypeDef*)_port;
|
||
|
||
// 不要关调试口，否则杯具
|
||
if(_index != Sys.MessagePort) USART_DeInit(st);
|
||
// USART_DeInit其实就是关闭时钟，这里有点多此一举。但为了安全起见，还是使用
|
||
|
||
// 检查重映射
|
||
#ifdef STM32F1
|
||
if(Remap)
|
||
{
|
||
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
|
||
switch (_index) {
|
||
case 0: AFIO->MAPR |= AFIO_MAPR_USART1_REMAP; break;
|
||
case 1: AFIO->MAPR |= AFIO_MAPR_USART2_REMAP; break;
|
||
case 2: AFIO->MAPR |= AFIO_MAPR_USART3_REMAP_FULLREMAP; break;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
// 打开 UART 时钟。必须先打开串口时钟，才配置引脚
|
||
#if defined(STM32F0) || defined(GD32F150)
|
||
switch(_index)
|
||
{
|
||
case COM1: RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); break;
|
||
case COM2: RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); break;
|
||
default: break;
|
||
}
|
||
#else
|
||
if (_index) { // COM2-5 on APB1
|
||
RCC->APB1ENR |= RCC_APB1ENR_USART2EN >> 1 << _index;
|
||
} else { // COM1 on APB2
|
||
RCC->APB2ENR |= RCC_APB2ENR_USART1EN;
|
||
}
|
||
#endif
|
||
|
||
#if defined(STM32F0) || defined(GD32F150)
|
||
_tx.AFConfig(Port::AF_1);
|
||
_rx.AFConfig(Port::AF_1);
|
||
#elif defined(STM32F4)
|
||
const byte afs[] = { GPIO_AF_USART1, GPIO_AF_USART2, GPIO_AF_USART3, GPIO_AF_UART4, GPIO_AF_UART5, GPIO_AF_USART6, GPIO_AF_UART7, GPIO_AF_UART8 };
|
||
_tx.AFConfig((Port::GPIO_AF)afs[_index]);
|
||
_rx.AFConfig((Port::GPIO_AF)afs[_index]);
|
||
#endif
|
||
|
||
USART_InitTypeDef p;
|
||
USART_StructInit(&p);
|
||
p.USART_BaudRate = _baudRate;
|
||
p.USART_WordLength = _dataBits;
|
||
p.USART_StopBits = _stopBits;
|
||
p.USART_Parity = _parity;
|
||
USART_Init(st, &p);
|
||
|
||
// 串口接收中断配置，同时会打开过载错误中断
|
||
USART_ITConfig(st, USART_IT_RXNE, ENABLE);
|
||
//USART_ITConfig(st, USART_IT_PE, ENABLE);
|
||
//USART_ITConfig(st, USART_IT_ERR, ENABLE);
|
||
//USART_ITConfig(st, USART_IT_TXE, DISABLE);
|
||
|
||
//#if defined(STM32F0) || defined(GD32F150)
|
||
// GD官方提供，因GD设计比ST严格，导致一些干扰被错误认为是溢出
|
||
//USART_OverrunDetectionConfig(st, USART_OVRDetection_Disable);
|
||
//#else
|
||
// 打开中断，收发都要使用
|
||
//const byte irqs[] = UART_IRQs;
|
||
byte irq = uart_irqs[_index];
|
||
Interrupt.SetPriority(irq, 0);
|
||
Interrupt.Activate(irq, OnHandler, this);
|
||
//#endif
|
||
|
||
USART_Cmd(st, ENABLE);//使能串口
|
||
}
|
||
|
||
// 关闭端口
|
||
void SerialPort::OnClose2()
|
||
{
|
||
auto st = (USART_TypeDef*)_port;
|
||
USART_Cmd(st, DISABLE);
|
||
USART_DeInit(st);
|
||
|
||
_tx.Close();
|
||
_rx.Close();
|
||
|
||
//const byte irqs[] = UART_IRQs;
|
||
byte irq = uart_irqs[_index];
|
||
Interrupt.Deactivate(irq);
|
||
|
||
// 检查重映射
|
||
#ifdef STM32F1
|
||
if(Remap)
|
||
{
|
||
switch (_index) {
|
||
case 0: AFIO->MAPR &= ~AFIO_MAPR_USART1_REMAP; break;
|
||
case 1: AFIO->MAPR &= ~AFIO_MAPR_USART2_REMAP; break;
|
||
case 2: AFIO->MAPR &= ~AFIO_MAPR_USART3_REMAP_FULLREMAP; break;
|
||
}
|
||
}
|
||
#endif
|
||
}
|
||
|
||
// 发送单一字节数据
|
||
uint SerialPort::SendData(byte data, uint times)
|
||
{
|
||
/*
|
||
在USART_DR寄存器中写入了最后一个数据字后，在关闭USART模块之前或设置微控制器进入低功耗模式之前，
|
||
必须先等待TC=1。使用下列软件过程清除TC位：
|
||
1．读一次USART_SR寄存器；
|
||
2．写一次USART_DR寄存器。
|
||
*/
|
||
auto st = (USART_TypeDef*)_port;
|
||
USART_SendData(st, (ushort)data);
|
||
// 等待发送完毕
|
||
while(USART_GetFlagStatus(st, USART_FLAG_TXE) == RESET && --times > 0);
|
||
if(!times) Error++;
|
||
|
||
return times;
|
||
}
|
||
|
||
// 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
|
||
void SerialPort::OnWrite2()
|
||
{
|
||
// 打开串口发送
|
||
USART_ITConfig((USART_TypeDef*)_port, USART_IT_TXE, ENABLE);
|
||
}
|
||
|
||
#if !defined(TINY) && defined(STM32F0)
|
||
#pragma arm section code = "SectionForSys"
|
||
#endif
|
||
|
||
void SerialPort::OnTxHandler()
|
||
{
|
||
//#if !(defined(STM32F0) || defined(GD32F150))
|
||
if(!Tx.Empty())
|
||
USART_SendData((USART_TypeDef*)_port, (ushort)Tx.Pop());
|
||
else
|
||
{
|
||
USART_ITConfig((USART_TypeDef*)_port, USART_IT_TXE, DISABLE);
|
||
|
||
if(RS485) *RS485 = false;
|
||
}
|
||
//#endif
|
||
}
|
||
|
||
void SerialPort::OnRxHandler()
|
||
{
|
||
// 串口接收中断必须以极快的速度完成，否则会出现丢数据的情况
|
||
// 判断缓冲区足够最小值以后才唤醒任务，减少时间消耗
|
||
// 缓冲区里面别用%，那会产生非常耗时的除法运算
|
||
byte dat = (byte)USART_ReceiveData((USART_TypeDef*)_port);
|
||
Rx.Push(dat);
|
||
|
||
// 收到数据，开启任务调度。延迟_byteTime，可能还有字节到来
|
||
//!!! 暂时注释任务唤醒，避免丢数据问题
|
||
if(_taskidRx && Rx.Length() >= MinSize)
|
||
{
|
||
//Sys.SetTask(_taskidRx, true, (ByteTime >> 10) + 1);
|
||
((Task*)_task)->Set(true, 10);
|
||
}
|
||
}
|
||
|
||
// 真正的串口中断函数
|
||
void SerialPort::OnHandler(ushort num, void* param)
|
||
{
|
||
auto sp = (SerialPort*)param;
|
||
auto st = (USART_TypeDef*)sp->_port;
|
||
|
||
//#if !(defined(STM32F0) || defined(GD32F150))
|
||
if(USART_GetITStatus(st, USART_IT_TXE) != RESET) sp->OnTxHandler();
|
||
//#endif
|
||
// 接收中断
|
||
if(USART_GetITStatus(st, USART_IT_RXNE) != RESET) sp->OnRxHandler();
|
||
// 溢出
|
||
if(USART_GetFlagStatus(st, USART_FLAG_ORE) != RESET)
|
||
{
|
||
//USART_ClearFlag(st, USART_FLAG_ORE); // ST 库文件 ClearFlag 不许动 USART_FLAG_ORE 寄存器
|
||
// 读取并扔到错误数据
|
||
USART_ReceiveData(st);
|
||
sp->Error++;
|
||
//debug_printf("Serial%d 溢出 \r\n", sp->_index + 1);
|
||
}
|
||
/*if(USART_GetFlagStatus(st, USART_FLAG_NE) != RESET) USART_ClearFlag(st, USART_FLAG_NE);
|
||
if(USART_GetFlagStatus(st, USART_FLAG_FE) != RESET) USART_ClearFlag(st, USART_FLAG_FE);
|
||
if(USART_GetFlagStatus(st, USART_FLAG_PE) != RESET) USART_ClearFlag(st, USART_FLAG_PE);*/
|
||
}
|
||
|
||
#pragma arm section code
|
||
|
||
// 获取引脚
|
||
void SerialPort::GetPins(Pin* txPin, Pin* rxPin)
|
||
{
|
||
*rxPin = *txPin = P0;
|
||
|
||
const Pin g_Uart_Pins[] = UART_PINS;
|
||
const Pin* p = g_Uart_Pins;
|
||
#ifdef STM32F1
|
||
const Pin g_Uart_Pins_Map[] = UART_PINS_FULLREMAP;
|
||
if(Remap) p = g_Uart_Pins_Map;
|
||
#endif
|
||
|
||
int n = _index << 2;
|
||
*txPin = p[n];
|
||
*rxPin = p[n + 1];
|
||
}
|
||
|
||
extern "C"
|
||
{
|
||
extern SerialPort* _printf_sp;
|
||
bool isInFPutc;
|
||
|
||
/* 重载fputc可以让用户程序使用printf函数 */
|
||
int fputc(int ch, FILE *f)
|
||
{
|
||
#if DEBUG
|
||
if(Sys.Clock == 0) return ch;
|
||
|
||
int idx = Sys.MessagePort;
|
||
if(idx == COM_NONE) return ch;
|
||
|
||
USART_TypeDef* g_Uart_Ports[] = UARTS;
|
||
auto port = g_Uart_Ports[idx];
|
||
|
||
if(isInFPutc) return ch;
|
||
isInFPutc = true;
|
||
// 检查并打开串口
|
||
if((port->CR1 & USART_CR1_UE) != USART_CR1_UE)
|
||
{
|
||
_printf_sp = SerialPort::GetMessagePort();
|
||
}
|
||
|
||
if(_printf_sp)
|
||
{
|
||
byte b = ch;
|
||
_printf_sp->Write(Buffer(&b, 1));
|
||
}
|
||
|
||
isInFPutc = false;
|
||
#endif
|
||
return ch;
|
||
}
|
||
}
|