一转多串口芯片GM8125的初始化程序.doc

一转多串口芯片GM8125的初始化程序 2009-02-22 09:38由于新产品的需求，原先mega64l的两个串口不够用了，需要在产品里加入一个扩展串口芯片，选择了GM8125（成都一家公司产的，用到现在感觉还行），但开始和这位同志的沟通上出现了不少问题，现在终于是和他熟悉了，把我做的GM8125初始化程序写在这里，希望能对大家有点用，不完善之处请指出，我会很感激的。 //用PB口控制GM8125的各个控制引脚#define?? CHOOSE_MODE?? PB0?? //8125通道模式选择#define?? STADD0??? ?? PB2???? //8125 STADD0#define?? STADD1??? PB3?? //8125 STADD1#define?? STADD2??? PB4?? //8125 STADD2#define?? SRADD0??? PB5?? //8125 SRADD0#define?? SRADD1??? PB6?? //8125 SRADD1#define?? SRADD2??? PB7?? //8125 SRADD2 //将某引脚置1??? void setb_port(uint8_t i0,uint8_t i1)?? {??? switch(i0)??? {??????? case 1:PORTA|=(1i1);??????????????? break; ??????? case 2:PORTB|=(1i1);??????????????? break; ??????? case 3:PORTC|=(1i1);??????????????? break; ??????? case 4:PORTD|=(1i1);??????????????? break; ??????? case 5:PORTE|=(1i1);??????????????? break; ??????? case 6:PORTF|=(1i1);?????????????? break; ??????? case 7:PORTG|=(1i1);??????????????? break; ??????? default:break;?? ??? } } //将某1引脚清0??? void clr_port(uint8_t i0,uint8_t i1)?? {??? switch(i0)??? {??????? case 1:PORTA=~(1i1);?????????????? break; ??????? case 2:PORTB=~(1i1);?????????????? break; ??????? case 3:PORTC=~(1i1);?????????????? break; ??????? case 4:PORTD=~(1i1);?????????????? break; ??????? case 5:PORTE=~(1i1);?????????????? break; ??????? case 6:PORTF=~(1i1);?????????????? break; ??????? case 7:PORTG=~(1i1);?????????????? break; ??????? default:break;?? ??? } } //延时函数---1ms void delay_ms2( uint16_t iysh){ ??? uint16_t iy; ??? for(iy=0;iyiysh;iy++) ??? {?? _delay_loop_2(1842);??? }} //接收中断1SIGNAL(SIG_UART1_RECV){??? unsigned char c00=UDR1;uint8_t rdpinb=0; rdpinb=PINB;switch((rdpinb0xe0)4){?? case 0:???? scon_order[0]=c00;???? break; ?? ....//program code ?? default:???? break; } } //发送中断1INTERRUPT(SIG_UART1_TRANS)?? //INTERRUPT{ return; } //把GM8125初始化为多通道工作模式void uwart_init(void){??? uint8_t result=0; UCSR1B=0xdc;??? //8125复位后贞格式为11bit，与8125同步 while(result!=0xf3){?? wd_tmer=0;?? de