#include "USART.h"
COMx_Define COM1,COM2;
u8 xdata TX1_Buffer[COM_TX1_Lenth]; //发送缓冲
u8 xdata RX1_Buffer[COM_RX1_Lenth]; //接收缓冲
u8 xdata TX2_Buffer[COM_TX2_Lenth]; //发送缓冲
u8 xdata RX2_Buffer[COM_RX2_Lenth]; //接收缓冲
u8 USART_Configuration(u8 UARTx, COMx_InitDefine *COMx)
{
u8 i;
u32 j;
if(UARTx == USART1)
{
COM1.id = 1;
COM1.TX_read = 0;
COM1.TX_write = 0;
COM1.B_TX_busy = 0;
COM1.RX_Cnt = 0;
COM1.RX_TimeOut = 0;
COM1.B_RX_OK = 0;
for(i=0; i<COM_TX1_Lenth; i++) TX1_Buffer[i] = 0;
for(i=0; i<COM_RX1_Lenth; i++) RX1_Buffer[i] = 0;
if(COMx->UART_Mode > UART_9bit_BRTx) return 2; //模式错误
if(COMx->UART_Polity == PolityHigh) PS = 1; //高优先级中断
else PS = 0; //低优先级中断
SCON = (SCON & 0x3f) | COMx->UART_Mode;
if((COMx->UART_Mode == UART_9bit_BRTx) ||(COMx->UART_Mode == UART_8bit_BRTx)) //可变波特率
{
j = (MAIN_Fosc / 4) / COMx->UART_BaudRate; //按1T计算
if(j >= 65536UL) return 2; //错误
j = 65536UL - j;
if(COMx->UART_BRT_Use == BRT_Timer1)
{
TR1 = 0;
AUXR &= ~0x01; //S1 BRT Use Timer1;
TMOD &= ~(1<<6); //Timer1 set As Timer
TMOD &= ~0x30; //Timer1_16bitAutoReload;
AUXR |= (1<<6); //Timer1 set as 1T mode
TH1 = (u8)(j>>8);
TL1 = (u8)j;
ET1 = 0; //禁止中断
TMOD &= ~0x40; //定时
INT_CLKO &= ~0x02; //不输出时钟
TR1 = 1;
}
else if(COMx->UART_BRT_Use == BRT_Timer2)
{
AUXR &= ~(1<<4); //Timer stop
AUXR |= 0x01; //S1 BRT Use Timer2;
AUXR &= ~(1<<3); //Timer2 set As Timer
AUXR |= (1<<2); //Timer2 set as 1T mode
TH2 = (u8)(j>>8);
TL2 = (u8)j;
IE2 &= ~(1<<2); //禁止中断
AUXR &= ~(1<<3); //定时
AUXR |= (1<<4); //Timer run enable
}
else return 2; //错误
}
else if(COMx->UART_Mode == UART_ShiftRight)
{
if(COMx->BaudRateDouble == ENABLE) AUXR |= (1<<5); //固定波特率SysClk/2
else AUXR &= ~(1<<5); //固定波特率SysClk/12
}
else if(COMx->UART_Mode == UART_9bit) //固定波特率SysClk*2^SMOD/64
{
if(COMx->BaudRateDouble == ENABLE) PCON |= (1<<7); //固定波特率SysClk/32
else PCON &= ~(1<<7); //固定波特率SysClk/64
}
if(COMx->UART_Interrupt == ENABLE) ES = 1; //允许中断
else ES = 0; //禁止中断
if(COMx->UART_RxEnable == ENABLE) REN = 1; //允许接收
else REN = 0; //禁止接收
P_SW1 = (P_SW1 & 0x3f) | (COMx->UART_P_SW & 0xc0); //切换IO
if(COMx->UART_RXD_TXD_Short == ENABLE) PCON2 |= (1<<4); //内部短路RXD与TXD, 做中继, ENABLE,DISABLE
else PCON2 &= ~(1<<4);
return 0;
}
if(UARTx == USART2)
{
COM2.id = 2;
COM2.TX_read = 0;
COM2.TX_write = 0;
COM2.B_TX_busy = 0;
COM2.RX_Cnt = 0;
COM2.RX_TimeOut = 0;
COM2.B_RX_OK = 0;
for(i=0; i<COM_TX2_Lenth; i++) TX2_Buffer[i] = 0;
for(i=0; i<COM_RX2_Lenth; i++) RX2_Buffer[i] = 0;
if((COMx->UART_Mode == UART_9bit_BRTx) ||(COMx->UART_Mode == UART_8bit_BRTx)) //可变波特率
{
if(COMx->UART_Polity == PolityHigh) IP2 |= 1; //高优先级中断
else IP2 &= ~1; //低优先级中断
if(COMx->UART_Mode == UART_9bit_BRTx) S2CON |= (1<<7); //9bit
else S2CON &= ~(1<<7); //8bit
j = (MAIN_Fosc / 4) / COMx->UART_BaudRate; //按1T计算
if(j >= 65536UL) return 2; //错误
j = 65536UL - j;
AUXR &= ~(1<<4); //Timer stop
AUXR &= ~(1<<3); //Timer2 set As Timer
AUXR |= (1<<2); //Timer2 set as 1T mode
TH2 = (u8)(j>>8);
TL2 = (u8)j;
IE2 &= ~(1<<2); //禁止中断
AUXR |= (1<<4); //Timer run enable
}
else return 2; //模式错误
if(COMx->UART_Interrupt == ENABLE) IE2 |= 1; //允许中断
else IE2 &= ~1; //禁止中断
if(COMx->UART_RxEnable == ENABLE) S2CON |= (1<<4); //允许接收
else S2CON &= ~(1<<4); //禁止接收
P_SW2 = (P_SW2 & ~1) | (COMx->UART_P_SW & 0x01); //切换IO
}
}
/* 装载串口发送缓冲 */
void TX1_write2buff(u8 dat) //写入发送缓冲，指针+1
{
TX1_Buffer[COM1.TX_write] = dat; //装发送缓冲
if(++COM1.TX_write >= COM_TX1_Lenth) COM1.TX_write = 0;
if(COM1.B_TX_busy == 0) //空闲
{
COM1.B_TX_busy = 1; //标志忙
TI = 1; //触发发送中断
}
}
void TX2_write2buff(u8 dat) //写入发送缓冲，指针+1
{
TX2_Buffer[COM2.TX_write] = dat; //装发送缓冲
if(++COM2.TX_write >= COM_TX2_Lenth) COM2.TX_write = 0;
if(COM2.B_TX_busy == 0) //空闲
{
COM2.B_TX_busy = 1; //标志忙
SET_TI2(); //触发发送中断
}
}
void PrintString1(u8 *puts)
{
for (; *puts != 0; puts++) TX1_write2buff(*puts); //遇到停止符0结束
}
void PrintString2(u8 *puts)
{
for (; *puts != 0; puts++) TX2_write2buff(*puts); //遇到停止符0结束
}
/*
void COMx_write2buff(COMx_Define *COMx, u8 dat) //写入发送缓冲，指针+1
{
if(COMx->id == 1) TX1_write2buff(dat);
if(COMx->id == 2) TX2_write2buff(dat);
}
void PrintString(COMx_Define *COMx, u8 *puts)
{
for (; *puts != 0; puts++) COMx_write2buff(COMx,*puts); //遇到停止符0结束
}
*/
/* UART1中断函数/
void UART1_int (void) interrupt UART1_VECTOR
{
if(RI)
{
RI = 0;
if(COM1.B_RX_OK == 0)
{
if(COM1.RX_Cnt >= COM_RX1_Lenth) COM1.RX_Cnt = 0;
RX1_Buffer[COM1.RX_Cnt++] = SBUF;
COM1.RX_TimeOut = TimeOutSet1;
}
}
if(TI)
{
TI = 0;
if(COM1.TX_read != COM1.TX_write)
{
SBUF = TX1_Buffer[COM1.TX_read];
if(++COM1.TX_read >= COM_TX1_Lenth) COM1.TX_read = 0;
}
else COM1.B_TX_busy = 0;
}
}
/* UART2中断函数/
void UART2_int (void) interrupt UART2_VECTOR
{
if(RI2)
{
CLR_RI2();
if(COM2.B_RX_OK == 0)
{
if(COM2.RX_Cnt >= COM_RX2_Lenth) COM2.RX_Cnt = 0;
RX2_Buffer[COM2.RX_Cnt++] = S2BUF;
COM2.RX_TimeOut = TimeOutSet2;
}
}
if(TI2)
{
CLR_TI2();
if(COM2.TX_read != COM2.TX_write)
{
S2BUF = TX2_Buffer[COM2.TX_read];
if(++COM2.TX_read >= COM_TX2_Lenth) COM2.TX_read = 0;
}
else COM2.B_TX_busy = 0;
}
到此这篇环形队列特点（环形队列是一种什么结构）的文章就介绍到这了,更多相关内容请继续浏览下面的相关 推荐文章，希望大家都能在编程的领域有一番成就！版权声明：
本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。
如若内容造成侵权、违法违规、事实不符，请将相关资料发送至xkadmin@xkablog.com进行投诉反馈，一经查实，立即处理！
转载请注明出处，原文链接：https://www.xkablog.com/bcyy/59439.html