Uart.rar_UART RS485

#include "Uart.h" #include "String.h" UartData Uart0Data; UartData Uart1Data; UartTxd Uart0SendData; UartTxd Uart1SendData; UINT16 CRC_Calc(UINT8 *pBuf, UINT8 num) { UINT16 i, j; UINT16 wTemp; UINT16 wCRC = 0xFFFF; for (i=0; i<num; i++) { wTemp = pBuf[i] & 0x00FF; wCRC ^= wTemp; for (j=0; j<8; j++) { if (wCRC & 0x0001) { wCRC >>= 1; wCRC ^= 0xA001; } else { wCRC >>= 1; } } } return wCRC; } void ResetUart0(void) { Uart0Data.IsDataOK = 0x00; Uart0Data.OverTime = 0x00; } void ResetUart1(void) { Uart1Data.IsDataOK = 0x00; Uart1Data.OverTime = 0x00; } UINT8 IsReiveNewData0(void) { return Uart0Data.IsDataOK; } UINT8 IsReiveNewData1(void) { return Uart1Data.IsDataOK; } UINT8 IsUart0RecFinish(void) { return Uart0Data.OverTime; } UINT8 IsUart1RecFinish(void) { return Uart1Data.OverTime; } void ClearUart0SendFlag(void) { Uart0SendData.pBuf = 0x00; Uart0SendData.Sending = 0x00; Uart0SendData.Len = 0x00; } void ClearUart1SendFlag(void) { Uart1SendData.pBuf = 0x00; Uart1SendData.Sending = 0x00; Uart1SendData.Len = 0x00; } void ClearUart0RecFlag(void) { Uart0Data.RecLen = 0; } /* 功能：提取串口接收到的数据 ** 输入参数：pBuf－数据缓冲区 ** 输出参数：pLen－数据的长度 ** 返回参数：无 */ void CopyUart0RecDataToBuffer(UINT8 *pBuf, UINT8 *pLen) { memcpy(pBuf, Uart0Data.RecBuf, Uart0Data.RecLen); *pLen = Uart0Data.RecLen; } void CopyUart1RecDataToBuffer(UINT8 *pBuf, UINT8 *pLen) { memcpy(pBuf, Uart1Data.RecBuf, Uart1Data.RecLen); *pLen = Uart1Data.RecLen; } /* 功能：利用FIFO发送数据 ** 输入参数pBuf ＝ 数据缓冲区, Len ＝ 数据长度 ** return ＝ 0xFF 失败，＝ 0x00 成功 */ UINT8 SendDataToUart0(UINT8 *pBuf, UINT8 Length) { UINT8 Len; UINT8 i; if (0xFF == Uart0SendData.Sending) { return 0xFF; // 串口忙，发送失败，需要等待 } Uart0SendData.Len = Length; Uart0SendData.pBuf = pBuf; Uart0SendData.Sending = 0xFF; if (Uart0SendData.Len > FIFO_LENGTH) Len = FIFO_LENGTH; else Len = Uart0SendData.Len; Uart0SendData.Sending = 0xFF; if (Uart0SendData.Len > FIFO_LENGTH) Len = FIFO_LENGTH; else Len = Uart0SendData.Len; for (i=0; i<Len; i++) { U0THR = *Uart0SendData.pBuf; Uart0SendData.pBuf++; } Uart0SendData.Len -= Len; return 0x00; } UINT8 SendDataToUart1(UINT8 *pBuf, UINT8 Length) { UINT8 i; UINT8 Len; if (0xFF == Uart1SendData.Sending) { return 0xFF; // 串口忙，发送失败，需要等待 } Uart1SendData.Len = Length; Uart1SendData.pBuf = pBuf; Uart1SendData.Sending = 0xFF; if (Uart1SendData.Len > FIFO_LENGTH) Len = FIFO_LENGTH; else Len = Uart1SendData.Len; for (i=0; i<Len; i++) { U1THR = *Uart1SendData.pBuf; Uart1SendData.pBuf++; } Uart1SendData.Len -= Len; return 0x00; } /* 功能：串口UART0接收中断 ** 输入参数：无 ** 输出参数：无 ** 返回参数：无 */ void __irq IRQ_UART0(void) { UINT8 IIR; UINT8 Len; UINT8 RD; UINT8 i; IIR = U0IIR; switch (IIR & 0x0E) { case 0x02: if (Uart0SendData.Len > 0) { if (Uart0SendData.Len > FIFO_LENGTH) { Len = FIFO_LENGTH; } else { Len = Uart0SendData.Len; } for (i=0; i<Len; i++) { U0THR = *Uart0SendData.pBuf; Uart0SendData.pBuf++; } Uart0SendData.Len -= Len; Uart0SendData.Sending = 0xFF; } else { ClearUart0SendFlag(); } break; case 0x0C: // 接收数据有效，超时 Uart0Data.OverTime = 0xFF; case 0x04: // 接收数据有效 while ((U0LSR & 0x01) == 1) // 最多8字节 { RD = U0RBR; // 接收数据 if (Uart0Data.Counter < UART_TRIGGER_DEPTH) { Uart0Data.Buffer[Uart0Data.Counter++] = RD; } } memcpy(Uart0Data.RecBuf + Uart0Data.RecLen, Uart0Data.Buffer, Uart0Data.Counter); Uart0Data.RecLen += Uart0Data.Counter; Uart0Data.Counter = 0; Uart0Data.IsDataOK = 0xFF; break; default: break; } VICVectAddr = 0x00; // interrupt end } void __irq IRQ_UART1(void) { if (0x04 == (U1IIR & 0x0F)) { // RSV_BUF1[RSV_COUNTER1] = U1RBR; } // end if VICVectAddr = 0x00; // interrupt end } /**************************************************************************** * 名称：UART0_Ini() * 功能：初始化串口0。设置其工作模式及波特率。 * 入口参数：baud 波特率 * set 模式设置(UARTMODE数据结构) * 出口参数：返回值为1时表示初始化成功，为0表示参数出错 ****************************************************************************/ uint8 UART0_Ini(UartMode set) { uint32 bak; PCONP |= (0x01 << 3); PINSEL0 &= ~((uint32)0x0F); PINSEL0 |= ((uint32)0x05); if ((0 == set.BaudRate) || (set.BaudRate > 115200)) { return 0; } if ((set.DataLen < 5) || (set.DataLen > 8)) { return 0; } if ((0 == set.StopBit) || (set.StopBit > 2)) { return 0; } if (set.Parity > 4) { return 0; } /* 设置串口波特率 */ U0LCR = 0x80; // DLAB位置1 bak = (Fpclk>>4) / set.BaudRate; U0DLM = bak >> 8; U0DLL = bak & 0xff; /* 设置串口模式 */ bak = set.DataLen - 5; // 设置字长度 if (2 == set.StopBit) { bak |= 0x04; // 判断是否为2位停止位 } if (0 != set.Parity) { set.Parity = set.Parity - 1; bak |= 0x08; } bak |= set.Parity << 4; // 设置奇偶校验 U0LCR = bak; switch (UART_TRIGGER_DEPTH) { case 1: U0FCR = 0x07; break; case 4: U0FCR = 0x47; break; case 8: // 使能FIFO，并设置触发点为8字节0x07 U0FCR = 0x87; break; case 14: U0FCR = 0xC7; break; default: U0FCR = 0x07; } U0IER = 0x03; // 允许RBR中断，即接收中断 VICVectCntl4 = 0x20 | 6; // UART0中断通道分配到IRQ slot 0，即优先级0 VICVectAddr4 = (int)IRQ_UART0; // 设置UART0向量地址 VICIntEnable |= (1<<6); // 使能UART0中断 return 1; } void EnableUart1(void) { VICIntEnable |= (1<<7); } void DisableUart1(void) { VICIntEnClr |= (1<<7); } /* 功能：初始化串口1，设置其工作模式及波特率 ** */ uint8 UART1_Ini(UartMode set) { /* uint32 bak; PCONP |= (0x01 << 4); PINSEL0 &= ~((uint32)0xF0000); PINSEL0 |= ((uint32)0x50000); // 参数过滤 if ((0 == baud) || (baud > 115200)) { return 0; } if ((set.datab < 5) || (set.datab > 8)) { return 0; } if ((0 == set.stopb) || (set.stopb > 2)) { return 0; } if (set.parity > 4) { return 0; } // 设置串口波特率 U1LCR = 0x80; // DLAB位置1 bak = (Fpclk >> 4) / baud; U1DLM = bak >> 8; U1DLL = bak & 0xff; // 设置串口模式 bak = set.datab - 5; // 设置字长度 if (2 == set.stopb) { bak |= 0x04; // 判断是否为2位停止位 }