用的也是TL16C554 ，初始化如下，我用了3个TL，也就是12个串口。
#define addr_5541a_base 0x8000 //1st 554的CSA的基址
#define addr_5541b_base 0x8800 //1st 554的CSB的基址
#define addr_5541c_base 0x9000 //1st 554的CSC的基址
#define addr_5541d_base 0x9800 //1st 554的CSD的基址
#define addr_5542a_base 0xa000 //2nd 554的CSA的基址
#define addr_5542b_base 0xa800 //2nd 554的CSB的基址
#define addr_5542c_base 0xb000 //2nd 554的CSC的基址
#define addr_5542d_base 0xb800 //2nd 554的CSD的基址
#define addr_5543a_base 0xc000 //3rd 554的CSA的基址
#define addr_5543b_base 0xc800 //3rd 554的CSB的基址
#define addr_5543c_base 0xd000 //3rd 554的CSC的基址
#define addr_5543d_base 0xd800 //3rd 554的CSD的基址
struct com_r{ //offset //RHR //THR
uchar DLL_RHR_THR;//00 Divisor LSB latch address(Receive Holding Register,Teceive Holding Register )
uchar DLM_IER; //01 Divisor MSB Latch address,Interrupt Enable Register
uchar FCR_ISR; //02 FIFO control Register,Interrupt Status Register
uchar LCR; //03 Line control register
uchar MCR; //04 Modem Control Register
uchar LSR; //05 Line Status Register
uchar MSR; //06 Modem Status Register
uchar SPR; //07 Scratch pad Register
};
struct com_r xdata * com[12];
void getaddress(void)
{
com[0] = ( struct com_r *) addr_5541a_base; //指针转换
com[1] = ( struct com_r *) addr_5541b_base; //指针转换
com[2] = ( struct com_r *) addr_5541c_base; //指针转换
com[3] = ( struct com_r *) addr_5541d_base; //指针转换
com[4] = ( struct com_r *) addr_5542a_base; //指针转换
com[5] = ( struct com_r *) addr_5542b_base; //指针转换
com[6] = ( struct com_r *) addr_5542c_base; //指针转换
com[7] = ( struct com_r *) addr_5542d_base; //指针转换
com[8] = ( struct com_r *) addr_5543a_base; //指针转换
com[9] = ( struct com_r *) addr_5543b_base; //指针转换
com[10] = ( struct com_r *) addr_5543c_base; //指针转换
com[11] = ( struct com_r *) addr_5543d_base; //指针转换
}
void com_init(void)
{
uchar i = 0;
uchar j = 0;
getaddress();
for(i=0;i<12;i++)
{
com->LCR = 0x80; // enable divisor
com->DLL_RHR_THR = 0x0c; // 11.0592M 9600
com->DLM_IER = 0x00;
com->LCR = 0x0b; // set 8 bit data,1 bit stop,odd parity
com->FCR_ISR = 0x47; // FIFO模式10001111 RXRDY/TXRDY mode 1
com->DLM_IER = 0x03; // 使能接收和发送中断03
com->MCR = 0x08; // 使能串口中断
我也是第一次写 |
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