uarttest.c

有关于USB的一些主机端驱动

#include "FPGA_peripherals.h"
#include "armperipherals.h"
#include "omap30.h"
#include "omap30_arminth.h"
#include "omap1510_inth2.h"
#include "omap1510_inth_mapping.h"
#include "omap1510.h"

#include "swi.h"

 
void OMAP1510Mode(void);

 
int ReadUART1(unsigned char* Buffer, unsigned int Length) {
	struct UART_struct *pUART1 = (struct UART_struct*)0xFFFB0000; 
	
	while(Length--) {
		while( !(pUART1->LSR & 0x01) );
   		*Buffer++ = pUART1->RHR_THR_DLL;
	}
	return 0;
}

int WriteUART1(unsigned char* Buffer, unsigned int Length) {
	struct UART_struct *pUART1 = (struct UART_struct*)0xFFFB0000; 

	while(Length--) {
		while( !(pUART1->LSR & (0x01<<5)) );
   		pUART1->RHR_THR_DLL = *Buffer++;
	}
	return 0;
}

int ReadUART2(unsigned char* Buffer, unsigned int Length) {
	struct UART_struct *pUART1 = (struct UART_struct*)0xFFFB0800; 
	
	while(Length--) {
		while( !(pUART1->LSR & 0x01) );
   		*Buffer++ = pUART1->RHR_THR_DLL;
	}
	return 0;
}

int WriteUART2(unsigned char* Buffer, unsigned int Length) {
	struct UART_struct *pUART1 = (struct UART_struct*)0xFFFB0800; 

	while(Length--) {
//		while( !(pUART1->LSR & (0x01<<5)) );
   		pUART1->RHR_THR_DLL = *Buffer++;
	}
	return 0;
}
 
int SetupUART1(unsigned int BaudRate) {
	struct UART_struct *pUART1 = (struct UART_struct*)0xFFFB0000; 
	int i;
	
	/* The default TIPB configuration seems enough to operate normally.
	  * Will do performance tuning later. Nov, 6 2001 Zhu,Yaozong.	 */
	/* Default is enough for 60MHz MPU operation. 100MHz is now tested. So... */

	if ( BaudRate != 9600 ) {
		printf("Only 9600 UART baud rate is supported now.\n");
		return -1;
	}	
	
	/* use 48MHz clock for UART1 */
	/* *(int *)0xfffe1080 |= 1<<29; */
	
	/* MCR[7:5], FCR[5:4], and IER[7:4] can only be written when EFR[4] = 1.
	 * Transmission control register (TCR) and trigger level register (TLR) are accessible only when EFR[4] = 1 and MCR[6] = 1.
	 */
	pUART1->LCR = 0xBF;
	pUART1->IIR_FCR_EFR |= 1<<4|1<<6|1<<7; /* bit6 Enable auto-nRTS and bit7 enable auto-nCTS. */
	
	pUART1->LCR = 0x80;
	pUART1->MCR |= 1<<6;              /*Enables access to the TCR and TLR registers */
	
//	pUART1->IIR_FCR_EFR |= 1;
	pUART1->SCR |= 1<<6;             /*Enables the granularity of 1 for trigger TX level */
	pUART1->SPR_TLR = 0x11;
	pUART1->IIR_FCR_EFR &= 0x0f;    /*Sets the trigger level for the RX FIFO,Sets the trigger level for the TX FIFO */

	pUART1->MSR_TCR = 0x0F; /* This is the default value. 100% empty and full.  */
	//pUART1->SPR_TLR = 0x22; /* 8 and 8. */
	/* pUART1->IIR_FCR_EFR = ...; */
	pUART1->LCR = 0xBF;
	pUART1->IIR_FCR_EFR &= ~(1<<4); 
	pUART1->LCR &= ~(1<<7);
	pUART1->MCR &= ~(1<<6);    /*Disables access to the TCR and TLR registers */
	
	pUART1->LCR = 0x03<<0|0x00<<1|0x00<<3; /* 8 bits; 1 stop bit; No parity; */
	pUART1->LCR |= 1<<7;
	
	//pUART1->OSC_12M_SEL |= 1<<0; /* 115200bps */
	pUART1->RHR_THR_DLL = 0x4e;
	pUART1->IER_DLH = 0;	/* Set baud rate to 9600. */ 
	pUART1->LCR &= ~(1<<7);
//	pUART1->IER_DLH |= 1<<0|1<<1; /* Enable the RHR and THR interrupts. */

	pUART1->MDR1 &= 0xf8; /* Enable UART1 without autobauding. */


	return 0;
}

void UART1_interrupt(void)
{
       char buf[2];	
	unsigned char status; 
	struct UART_struct *pUART1 = (struct UART_struct*)0xFFFB0000; 
//	printf("enter UART1_interrupt...\n");
	
	printf("IIR: 0x%02x\n",pUART1->IIR_FCR_EFR);
	status = pUART1->LSR;
	printf("LSR: 0x%02x\n",status);
	
	if(status & 0x20) {
		pUART1->IER_DLH &= ~(1<<1); /* Disable THR interrupts. */
	}
	if(status & 0x01) {
		ReadUART1(buf,1);
		printf("read out char: %c\n",buf[0]);
		WriteUART1(buf,1); 
	}
}

void OMAP1510Mode(void)
{
	MultiplexPinControl *COMP_MODE_CTRL_0=(MultiplexPinControl*)0xFFFE100C;
	*COMP_MODE_CTRL_0 = 0x0000eaef;
}
		
int UARTtest(void)
{     int i = 0;
	char buf[2]="a";
	unsigned char status;
	struct UART_struct *pUART1 = (struct UART_struct*)0xFFFB0000; 

	SetupUART1(9600);

/* Interrupt from i2c mapped on irq of the interrupt handler 2 */
	INTH2_InitLevel(HEL_UART_BT,INTH_IRQ,INTH_HIGHEST_PRIORITY,INTH_LOW_LEVEL_SENSITIVE); 

/* Valid the interrupt */
	INTH2_EnableOneIT(HEL_UART_BT,INTH_IRQ);

	pUART1->LCR &= ~(1<<7);
	/// Enable the RHR and THR interrupts. 
	pUART1->IER_DLH |= (1<<0)|(1<<1); 
	//printf("IIR: 0x%02x\n",pUART1->IIR_FCR_EFR);
	status = pUART1->LSR;
	//printf("LSR: 0x%02x\n",status);
	
	if(status & 0x01) {
		printf("read out 0x%02x\n",pUART1->RHR_THR_DLL);
	}

       printf("press any key on pc console of com1....\n ");

     ReadUART1(buf,1);
     printf("read out %c  ",buf[0]);
     printf("LSR: 0x%02x\n",pUART1->LSR); 

     do{ i++;}while(i < 500000);
     INTH2_DisableOneIT(HEL_UART_BT);
     printf("UART1 Interrupt handler masked \n ");

   return 0;
}