?? uart.c

?? 此例程是基于ARMS3C44B0的經典例程對于嵌入式開發而言很有用需要硬件平臺
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#include <string.h>
#include "44b.h"
#include "44blib.h"
#include "def.h"
//#include "rtc.h"
#include "Uart.h"
#include "stdlib.h"

#define KEY_BUFLEN 100
#define AFC_BUFLEN 0x100
#define IrDA_BUFLEN 0x100

char Uart_IntGetkey(void);
void Uart_Port(void);
void Return_Port(void);
void IrDA_Port(void);

void __irq Uart0_TxFifoInt(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq Uart0_RxFifoInt(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq Uart0_RxFifoErrorInt(void) ;//__attribute__ ((interrupt ("IRQ")));

void __irq Uart0_RxInt(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq Uart0_TxInt(void) ;//__attribute__ ((interrupt ("IRQ")));

void __irq Uart1_TxFifoInt(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq Uart1_RxFifoInt(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq Uart1_RxFifoErrorInt(void) ;//__attribute__ ((interrupt ("IRQ")));

void __irq Uart1_RxInt(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq Uart1_TxInt(void) ;//__attribute__ ((interrupt ("IRQ")));

void __irq U1AFC_TxInt(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq U0AFC_RxInt(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq U0AFC_RxErrorInt(void) ;//__attribute__ ((interrupt ("IRQ")));

void __irq Exint2(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq Test_Done(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq Error(void) ;//__attribute__ ((interrupt ("IRQ")));

void __irq U1IrDA_TxInt(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq U1IrDA_RxInt(void) ;//__attribute__ ((interrupt ("IRQ")));
void __irq U1IrDA_RxErrorInt(void) ;//__attribute__ ((interrupt ("IRQ")));

static unsigned char keyBuf[KEY_BUFLEN];
volatile static int IrDA_BAUD,keyBufRdPt=0;
volatile static int keyBufWrPt=0;
volatile char out=1;
static char *uart0TxStr;
static char *uart1TxStr;

volatile U32 save_UC,save_UE,save_UF,save_UPC,save_UPE,save_UPF;



char Uart_IntGetkey(void)
{
    if(keyBufRdPt==KEY_BUFLEN)
	keyBufRdPt=0;

    while(keyBufWrPt==keyBufRdPt);  //until FIFO is triggered
    return keyBuf[keyBufRdPt++];
}

////////UART 0 TEST////////////////

void Test_Uart0Fifo(void)
{
    int key;

    keyBufRdPt=keyBufWrPt=0;
    pISR_UTXD0=(unsigned)Uart0_TxFifoInt;
    pISR_URXD0=(unsigned)Uart0_RxFifoInt;
    pISR_UERR01=(unsigned)Uart0_RxFifoErrorInt;

    /*********** UART0 Tx FIFO test with interrupt ***********/     
    uart_printf("[Uart channel 0 tx FIFO Interrupt Test]\n");
    uart_txempty(0);	//wait until tx shifter is empty.

    uart0TxStr="123456789abcdef";//UART0 Tx FIFO interrupt test is good!!!!\r\n";
    rUFCON0=(2<<6)|(1<<4)|(6)|1;
    //FIFO trigger:tx/rx:8byte,tx/rx_fifo reset(will be cleared),FIFO enable.
    rUCON0 = 0x244;	//tx:levl,rx:edge,error int,normal*2,interrupt(Start)
    rINTMSK=~(BIT_GLOBAL|BIT_UTXD0);

    delay(500);
    /*********** UART0 Tx FIFO test with BDMA0 ***********/ 
    uart_init(0,115200);
    uart_printf("\n[Uart0 FIFO Tx Test by BDMA0]\n");
    uart0TxStr="UART0 Tx FIFO Test by BDMA0 is good!!!!\r\n";
    uart_txempty(0);

    rUCON0=0x48;	//tx:BDMA0 rx:disable

    rBDICNT0=0;
    rBDCON0 =0x0;
    rBDISRC0=(unsigned int)uart0TxStr|(0<<30)|(1<<28);  // byte,inc
    rBDIDES0=UTXH0 |(1<<30)|(3<<28);  //L/B endian,M2IO,fix
    rBDICNT0=strlen(uart0TxStr)|((U32)2<<30)|(1<<26)|(1<<20); //UART0,start,polling

    while(!((rBDCON0&0x30)==0x20));        
    uart_txempty(0);
    
    /*********** UART0 Rx FIFO test with interrupt ***********/ 
    rUCON0=0x245|0x80;	//tx:level,rx:edge,tx/rx:int,rcv_time_out enabled,error int enable

    uart_printf("\n[Uart channel 0 FIFO Rx Interrupt Test]:Type any key!!!\n");
    uart_printf("You have to see the typed character. To quit, press Enter key.\n");

    rINTMSK=~(BIT_GLOBAL|BIT_URXD0|BIT_UERR01);

    while( (rUFSTAT0&0xf) >0 )
        key=RdURXH0();  //To clear the Rx FIFO
   // rUERSTAT0;	        //To clear the error state

    while((key=Uart_IntGetkey())!='\r')
        uart_sendbyte(key);

    rUFCON0=(2<<6)|(1<<4)|(6)|0;  
    //FIFO trigger:tx/rx:8byte, txrx_fifo reset(will be cleared), FIFO disable.

    rINTMSK=~BIT_GLOBAL;
    rUCON0=0x45;	//rcv_time_out disabled
    uart_printf("\n");
    }


void __irq Uart0_TxFifoInt(void)
{
//    rI_ISPC=BIT_UTXD0;        
    int i;
//    while( !(rUFSTAT0 & 0x200) && (*uart0TxStr != '\0') )   //until tx fifo full or end of string
    while( !(rUFSTAT0 == 16) && (*uart0TxStr != '\0') )   //until tx fifo full or end of string
    {
	rUTXH0=*uart0TxStr++;
	for(i=0;i<700;i++); //to avoid overwriting FIFO
    }

    rI_ISPC=BIT_UTXD0;
    if(*uart0TxStr == '\0')
    {
	rUCON0 &= 0x3f3;
	rI_ISPC=BIT_UTXD0;
	rINTMSK|=BIT_UTXD0;
    }
}


void __irq Uart0_RxFifoInt(void)
{
    rI_ISPC=BIT_URXD0;
//  if(rUFSTAT0==0)
//	Uart_Printf("time out\n");
    while( (rUFSTAT0&0xf) >0 )	    //until FIFO is empty
    {
	keyBuf[keyBufWrPt++]=rURXH0;//rx buffer->keyBuf[]
	if(keyBufWrPt==KEY_BUFLEN)
	    keyBufWrPt=0;
    }
}


void __irq Uart0_RxFifoErrorInt(void)
{
    rI_ISPC=BIT_UERR01;

    switch(rUERSTAT0)//to clear and check the status of register bits
    {
	case '1':
	    uart_printf("Overrun error\n");
	    break;
	case '2':
	    uart_printf("Parity error\n");
	    break;
	case '4':
	    uart_printf("Frame error\n");
	    break;
	case '8':
	    uart_printf("Breake detect\n");
	    break;
	default :
	    break;
    }
    while( (rUFSTAT0&0xf) >0 )
    {
	    keyBuf[keyBufWrPt++]=rURXH0;
	    if(keyBufWrPt==KEY_BUFLEN)
		    keyBufWrPt=0;
    }
}


void Test_Uart0(void)
{
    int key;
    keyBufRdPt=keyBufWrPt=0;
    pISR_UTXD0=(unsigned)Uart0_TxInt;
    pISR_URXD0=(unsigned)Uart0_RxInt;
    
    /*********** UART0 Tx test with interrupt ***********/  
    uart_printf("[Uart channel 0 tx Interrupt Test]\n");
    uart_txempty(0); //wait until tx shifter is empty.

    uart0TxStr="UART0 Tx interrupt test is good!!!!\r\n";

    rINTMSK=~(BIT_GLOBAL|BIT_UTXD0);
//	rUCON0 &= 0x3f3;   
//	rUCON0 |= 0x4;  //needed to set the UTXD0 pending bit.
    rUCON0 = 0x244; //tx:level,rx:edge,error int,normal*2,interrupt(Start)
    delay(3000);

    /*********** UART0 Tx test with BDMA0 ***********/ 
    rUCON0 = 0x245;//workaround

    uart_printf("\n[Uart0 Tx Test by BDMA0]\n");
    uart0TxStr="UART0 Tx Test by BDMA0 is good!!!!\r\n";
    uart_txempty(0);

    rUCON0=0x48;    //tx:BDMA0 rx:disable

    rBDICNT0=0x0;
    rBDCON0 =0x0;
    rBDISRC0=(unsigned int)uart0TxStr|(0<<30)|(1<<28);  // byte,inc
    rBDIDES0=UTXH0 |(1<<30)|(3<<28);	//L/B endian,M2IO,fix   
    rBDICNT0=strlen(uart0TxStr)|((U32)2<<30)|(1<<26)|(1<<20); //UART0,

    while(!((rBDCON0&0x30)==0x20));
    uart_txempty(0);

    /*********** UART0 Rx test with interrupt ***********/
    rUCON0=0x45;    //tx:int rx:int

    uart_printf("\n[Uart channel 0 Rx Interrupt Test]:Type any key!!!\n");
    uart_printf("You will see the typed character. To quit, press Enter key.\n");
    uart_txempty(0);

    rINTMSK=~(BIT_GLOBAL|BIT_URXD0);

    keyBufRdPt=keyBufWrPt=0;
    while((key=Uart_IntGetkey())!='\r')
	    uart_sendbyte(key);

    rINTMSK=~BIT_GLOBAL;
    uart_printf("\n");
    }


void __irq Uart0_RxInt(void)
{
    rI_ISPC=BIT_URXD0;

    keyBuf[keyBufWrPt++]=RdURXH0();
    if(keyBufWrPt==KEY_BUFLEN)
		keyBufWrPt=0;
}

//unsigned int txcount=0;
void __irq Uart0_TxInt(void)
{
//    rI_ISPC=BIT_UTXD0;
//	txcount++;
    if(*uart0TxStr != '\0')
    {
	WrUTXH0(*uart0TxStr++);
	rI_ISPC=BIT_UTXD0;
    }
    else
    {
	rUCON0 &= 0x3f3;//workaround
	rI_ISPC=BIT_UTXD0;
	rINTMSK|=BIT_UTXD0;
    }
}

////////UART 1 TEST////////////////

void Test_Uart1Fifo(void)
{
    int key;
    keyBufRdPt=keyBufWrPt=0;
    pISR_UTXD1=(unsigned)Uart1_TxFifoInt;
    pISR_URXD1=(unsigned)Uart1_RxFifoInt;
    pISR_UERR01=(unsigned)Uart1_RxFifoErrorInt;

    /*********** UART1 Tx FIFO test with interrupt ***********/     
    uart_printf("[Uart channel 1 tx FIFO Interrupt Test]\n");
    uart_printf("Plug the serial cable into ch1 connector!!! \n");
    uart_printf("Then, press any key through UART ch1.\n");
    uart_select(1);
    uart_getch();

    uart1TxStr="UART1 Tx FIFO interrupt test is good!!\r\n";
    rUFCON1=(2<<6)|(1<<4)|(6)|1;
    //FIFO trigger:tx/rx:8byte,tx/rx_fifo reset(will be cleared),FIFO enable.
    rUCON1 = 0x244;             //rx:edge,tx:level,error int,normal*2,interrupt(Start)    
    rINTMSK=~(BIT_GLOBAL|BIT_UTXD1);

    delay(500);
    /*********** UART1 Tx FIFO test with BDMA1 ***********/ 
    uart_init(0,115200);
    uart_printf("\n[Uart1 FIFO Tx Test by BDMA1]\n");
    uart1TxStr="UART1 Tx Test by BDMA0 is good!!!!\r\n";
    uart_txempty(1);

    rUCON1=0x4c;	//tx:BDMA1 rx:disable

    rBDICNT1=0;
    rBDCON1 =0x0;
    rBDISRC1=(unsigned int)uart1TxStr|(0<<30)|(1<<28);  // byte,inc
    rBDIDES1=UTXH1 |(1<<30)|(3<<28);  //L/B endian,M2IO,fix
    rBDICNT1=strlen(uart1TxStr)|((U32)2<<30)|(1<<26)|(1<<20); //UART1,start,polling

    while((rBDCON1&0x30)==0x10);        
    uart_txempty(1);
    
    /*********** UART1 Rx FIFO test with interrupt ***********/ 
    rUCON1=0x245|0x80;	//rx:edge,tx:level,tx/rx:int,rcv_time_out enabled,error int enable

    uart_printf("\n[Uart channel 1 FIFO Rx Interrupt Test]:Type any key!!!\n");
    uart_printf("You have to see the typed character. To quit, press Enter key.\n");

    rINTMSK=~(BIT_GLOBAL|BIT_URXD1|BIT_UERR01);
    keyBufRdPt=keyBufWrPt=0;
    while( (rUFSTAT1&0xf) >0 )
	key=RdURXH1();  //To clear the Rx FIFO
 //  	 rUERSTAT1;          //To clear the error state

    while((key=Uart_IntGetkey())!='\r')
	uart_sendbyte(key);

    rUFCON1=(2<<6)|(1<<4)|(6)|0;  
    //FIFO trigger:tx/rx:8byte, txrx_fifo reset(will be cleared), FIFO disable.

    rINTMSK=~BIT_GLOBAL;
    rUCON1=0x45;	//rcv_time_out disabled
    uart_printf("\n");

    uart_printf("Plug the serial cable into ch0 as before this test!!!\n");
    uart_printf("Then, press any key through UART ch 0.\n");
    uart_printf(0);
    uart_getch();
    }


void __irq Uart1_TxFifoInt(void)
{
    int i;
    while( !(rUFSTAT1 == 16) && (*uart1TxStr != '\0') )   //until tx fifo full or end of string
    {
	rUTXH1=*uart1TxStr++;
	for(i=0;i<700;i++); //to avoid overwriting FIFO
    }

    rI_ISPC=BIT_UTXD1;
    if(*uart1TxStr == '\0')
    {
	rUCON1 &= 0x3f3;
	rI_ISPC=BIT_UTXD1;
	rINTMSK|=BIT_UTXD1;
    }
}


void __irq Uart1_RxFifoInt(void)
{
    rI_ISPC=BIT_URXD1;
//  if(rUFSTAT1==0)
//	Uart_Printf("time out\n");
    while( (rUFSTAT1&0xf) >0 )	    //until FIFO is empty
    {
	keyBuf[keyBufWrPt++]=rURXH1;//rx buffer->keyBuf[]
	if(keyBufWrPt==KEY_BUFLEN)
	    keyBufWrPt=1;
    }
}


void __irq Uart1_RxFifoErrorInt(void)
{
    rI_ISPC=BIT_UERR01;

    switch(rUERSTAT1)//to clear and check the status of register bits
    {
	case '1':
	    uart_printf("Overrun error\n");
	    break;
	case '2':
	    uart_printf("Parity error\n");
	    break;
	case '4':
	    uart_printf("Frame error\n");
	    break;
	case '8':
	    uart_printf("Breake detect\n");
	    break;
	default :
	    break;
    }
    while( (rUFSTAT1&0xf) >0 )
    {
	keyBuf[keyBufWrPt++]=rURXH1;
	if(keyBufWrPt==KEY_BUFLEN)
	    keyBufWrPt=0;
    }
}


void Test_Uart1(void)
{
    int key;
    keyBufRdPt=keyBufWrPt=0;
    pISR_UTXD1=(unsigned)Uart1_TxInt;
    pISR_URXD1=(unsigned)Uart1_RxInt;
   
    /*********** UART1 Tx test with interrupt ***********/  
    uart_printf("[Uart channel 1 tx Interrupt Test]\n");
    uart_printf("Plug the serial cable into ch1 connector!!! \n");
    uart_printf("Then, press any key through UART ch1.\n");
    uart_select(1);
    uart_getch();

    uart1TxStr="UART1 Tx interrupt test is good!!!!\r\n";
    rINTMSK=~(BIT_GLOBAL|BIT_UTXD1);
//  rUCON1 &= 0x3f3;   
//  rUCON1 |= 0x4;  //needed to set the UTXD0 pending bit.
    rUCON1 = 0x244; //rx:edge,tx:level,error int,normal*2,interrupt(Start)
    delay(3000);

    /*********** UART1 Tx test with BDMA1 ***********/
    rUCON1 = 0x245;

    uart_printf("\n[Uart1 Tx Test by BDMA1]\n");
    uart1TxStr="UART1 Tx Test by BDMA1 is good!!!!\r\n";
    uart_txempty(1);

    rUCON1=0x4c;    //tx:BDMA0 rx:disable

    rBDICNT1=0x0;
    rBDCON1 =0x0;
    rBDISRC1=(unsigned int)uart1TxStr|(0<<30)|(1<<28);  // byte,inc
    rBDIDES1=UTXH1 |(1<<30)|(3<<28);  //L/B endian,M2IO,fix   
    rBDICNT1=strlen(uart1TxStr)|((unsigned int)1<<31)|(1<<26)|(1<<20); //UART1,

    while(!((rBDCON1&0x30)==0x20));
    uart_txempty(1);

    /*********** UART1 Rx test with interrupt ***********/
    rUCON1=0x45;    //tx:int rx:int
    uart_printf("\n[Uart channel 1 Rx Interrupt Test]:Type any key!!!\n");
    uart_printf("You have to see the typed character. To quit, press Enter key.\n");

    rINTMSK=~(BIT_GLOBAL|BIT_URXD1);

    keyBufRdPt=keyBufWrPt=0;    
    while((key=Uart_IntGetkey())!='\r')
        uart_sendbyte(key);

    rINTMSK=~BIT_GLOBAL;
    uart_printf("\n");

    uart_printf("Plug the serial cable into ch0 as before this test!!!\n");
    uart_printf("Then, press any key through UART ch 0.\n");
    uart_select(0);
    uart_getch();
   
}


void __irq Uart1_RxInt(void)
{
    rI_ISPC=BIT_URXD1;

    keyBuf[keyBufWrPt++]=RdURXH1();
    if(keyBufWrPt==KEY_BUFLEN)
	keyBufWrPt=0;
}


void __irq Uart1_TxInt(void)
{
//    rI_ISPC=BIT_UTXD1;
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