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98 lines
2.7 KiB
98 lines
2.7 KiB
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#include "uart4.h"
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//#define FOSC 11059200L //系统频率
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//#define BAUD4 115200 //串口波特率
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void L0_uart4_init(void)//115200bps@11.0592MHz
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{
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#if(MainFre_11M == D_sys_MainFre)
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#if 0
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S4CON = 0x50; //8位可变波特率
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T4L = (65536 - (FOSC/4/BAUD4)); //设置波特率重装值
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T4H = (65536 - (FOSC/4/BAUD4))>>8;
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T4T3M |= 0x20; //定时器4为1T模式
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T4T3M |= 0x80; //定时器4开始计时
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#else
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S4CON = 0x10; //8位数据,可变波特率
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S4CON |= 0x40; //串口4选择定时器4为波特率发生器
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T4T3M |= 0x20; //定时器4时钟为Fosc,即1T
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T4L = 0xE8; //设定定时初值
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T4H = 0xFF; //设定定时初值
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T4T3M |= 0x80; //启动定时器4
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#endif
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#elif (MainFre_22M == D_sys_MainFre) //115200bps@22.1184MHz
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S4CON = 0x10; //8位数据,可变波特率
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S4CON |= 0x40; //串口4选择定时器4为波特率发生器
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T4T3M |= 0x20; //定时器4时钟为Fosc,即1T
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T4L = 0xD0; //设定定时初值
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T4H = 0xFF; //设定定时初值
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T4T3M |= 0x80; //启动定时器4
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#endif
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}
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void L0_uart4_buf_init(void)
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{
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//定义发送缓冲区
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ts_uart[uNum4].s.buf = ts_send_buf.s4;
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ts_uart[uNum4].s.bufmax = D_send4_max;
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ts_uart[uNum4].s.max = ts_uart[uNum4].s.now = 0;
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ts_uart[uNum4].s.ok = D_ready;
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//定义接收缓冲区
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ts_uart[uNum4].r.buf = ts_recv_buf.r4;
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ts_uart[uNum4].r.bufmax = D_recv4_max;
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ts_uart[uNum4].r.head = 0;
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ts_uart[uNum4].r.ok = 0;
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ts_uart[uNum4].r.idle = 1;
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ts_uart[uNum4].r.overtime_t = 0;
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//串口协议解析专用字段
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ts_uart[uNum4].tp_handler = NULL;
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ts_uart[uNum4].uartx = uNum4;
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//串口初始化
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L0_uart4_init();
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//打开串口中断
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D_uart4_ES_INT(1);
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//默认处于接收状态
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//D_UART4_485_RX()
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}
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/*************************************************
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UART 中断
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*************************************************/
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// #define D_SERVE_uart4 interrupt 18
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// void INTERRUPT_uart4(void) D_SERVE_uart4// using 2
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// {
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// //NOP(); NOP(); NOP();
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// if(L0_uart4_IntRI()) //如果是U0接收中断
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// {
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// L0_uart4_IntRIClear(); //清除接收中断标志
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// ts_uart[uNum4].r.reg = S4BUF; //获取当前数据
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// L0_uartN_s2b(uNum4); //接收数据至缓冲区
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// }
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// if(L0_uart4_IntTI()) //如果是U0发送中断
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// {
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// L0_uart4_IntTIClear(); //清除发送中断标志
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// if(ts_uart[uNum4].s.max != ts_uart[uNum4].s.now)
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// {
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// S4BUF = ts_uart[uNum4].s.p[ts_uart[uNum4].s.now];
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// ts_uart[uNum4].s.now ++;
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// }
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// else
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// {
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// ts_uart[uNum4].s.ok = D_ready;
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// ts_uart[uNum4].s.max = 0;
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// ts_uart[uNum4].s.now = 0;//可以发送下一个数据
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// D_UART4_485_RX() //切换到接收状态
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// }
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// }
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// //NOP(); NOP(); NOP();
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// }
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