我用普通的中断方式实现uart串口通信可以，
但用bios 方式中断却没有中断产生不知为什么？
恳请各位高手给指点一下！万分感激！
公司买的开发板，在上面做DM642做UART串口通信实验。它是由一个外围芯片TL16C752B提供两个中断请求信号INTA、INTB分别用于通道A和B申请TMS320DM642的中断。在DM642中，INTA和ITB相与，复用DM642的INT5.
大家帮看一下哪里bios写的程序哪里存在问题？
这是普通方式实现的程序：
#include <csl.h>
#include <csl_emifa.h>
#include <csl_irq.h>
#include <csl_chip.h>
#include "stdio.h"
#include "seeddm642.h"
#include "seeddm642_uart.h"
/*SEEDDM642的emifa的设置结构*/
EMIFA_Config Seeddm642ConfigA ={
0x00052078,/*gblctl EMIFA(B)global control register value */
/*将CLK6、4、1使能；将MRMODE置1；使能EK2EN,EK2RATE*/
0xffffffd3,/*cectl0 CE0 space control register value*/
/*将CE0空间设为SDRAM*/
0x73a28e01,/*cectl1 CE1 space control register value*/
/*Read hold: 1 clock;
MTYPE : 0000,选择8位的异步接口
Read strobe ：001110；14个clock宽度
TA：2 clock; Read setup 2 clock;
Write hold :2 clock; Write strobe: 14 clock
Write setup :7 clock
-- ---------------
14c /1c
----------------/ */
0x22a28a22, /*cectl2 CE2 space control register value*/
0x22a28a42, /*cectl3 CE3 space control register value*/
0x57115000, /*sdctl SDRAM control register value*/
0x0000081b, /*sdtim SDRAM timing register value*/
0x001faf4d, /*sdext SDRAM extension register value*/
0x00000002, /*cesec0 CE0 space secondary control register value*/
0x00000002, /*cesec1 CE1 space secondary control register value*/
0x00000002, /*cesec2 CE2 space secondary control register value*/
0x00000073 /*cesec3 CE3 space secondary control register value*/
};
SEEDDM642_UART_Config UartConfig ={
0x01,/*寄存器IER*/
0x57,/*寄存器FCR*/
0x03,/*寄存器LCR*/
0x08,/*寄存器MCR*/
};
extern far void vectors();
Uint8 IOreadback;
Uint16 buffer;
SEEDDM642_UART_Handle SEEDuartHandleA;
SEEDDM642_UART_Handle SEEDuartHandleB;
/*此程序可将四个采集口的数据经过Video Port0送出*/
void main()
{
/*-------------------------------------------------------*/
/* perform all initializations */
/*-------------------------------------------------------*/
/*Initialise CSL，初始化CSL库*/
CSL_init();
/*----------------------------------------------------------*/
/*EMIFA的初始化，将CE0设为SDRAM空间，CE1设为异步空间
注，DM642支持的是EMIFA，而非EMIF*/
EMIFA_config(&Seeddm642ConfigA);
/*----------------------------------------------------------*/
IRQ_globalDisable();
//IRQ_reset(IRQ_EVT_EXTINT5);
IRQ_nmiEnable();
IRQ_enable(IRQ_EVT_EXTINT5);
IRQ_globalEnable();
/*中断向量表的初始化*/
//Point to the IRQ vector table
/*测试串口A*/
/* Open UART */
SEEDuartHandleA = SEEDDM642_UART_open(SEEDDM642_UARTA,
SEEDDM642_UART_BAUD9600,
&UartConfig);
/*Open UARTB*/
SEEDuartHandleB = SEEDDM642_UART_open(SEEDDM642_UARTB,
SEEDDM642_UART_BAUD9600,
&UartConfig);
IRQ_setVecs(vectors);
printf("Uart Test Begin...
");
/* Loop through 256 bytes */
/* for (;;)
{
buffer = SEEDDM642_UART_getChar(SEEDuartHandleA);
// buffer = 0x55;
SEEDDM642_UART_putChar(SEEDuartHandleA, (buffer & 0xff));
}*/
while(1);
}
interrupt void uart_isr(void)
{
Uint16 Data_Temp;
Data_Temp = SEEDDM642_UART_rget(SEEDuartHandleA,0);
printf("DATA : %x
",Data_Temp);
}
下面为用bios方式写的程序：
#include <csl.h>
#include <csl_emifa.h>
#include <csl_irq.h>
#include <csl_chip.h>
#include "stdio.h"
#include "seeddm642.h"
#include "seeddm642_uart.h"
/*SEEDDM642的emifa的设置结构*/
EMIFA_Config Seeddm642ConfigA ={
0x00052078,/*gblctl EMIFA(B)global control register value */
/*将CLK6、4、1使能；将MRMODE置1；使能EK2EN,EK2RATE*/
0xffffffd3,/*cectl0 CE0 space control register value*/
/*将CE0空间设为SDRAM*/
0x73a28e01,/*cectl1 CE1 space control register value*/
/*Read hold: 1 clock;
MTYPE : 0000,选择8位的异步接口
Read strobe ：001110；14个clock宽度
TA：2 clock; Read setup 2 clock;
Write hold :2 clock; Write strobe: 14 clock
Write setup :7 clock
-- ---------------
14c /1c
----------------/ */
0x22a28a22, /*cectl2 CE2 space control register value*/
0x22a28a42, /*cectl3 CE3 space control register value*/
0x57115000, /*sdctl SDRAM control register value*/
0x0000081b, /*sdtim SDRAM timing register value*/
0x001faf4d, /*sdext SDRAM extension register value*/
0x00000002, /*cesec0 CE0 space secondary control register value*/
0x00000002, /*cesec1 CE1 space secondary control register value*/
0x00000002, /*cesec2 CE2 space secondary control register value*/
0x00000073 /*cesec3 CE3 space secondary control register value*/
};
SEEDDM642_UART_Config UartConfig ={
0x01,/*寄存器IER*/
0x57,/*寄存器FCR*/
0x03,/*寄存器LCR*/
0x08,/*寄存器MCR*/
};
extern far void vectors();
Uint8 IOreadback;
Uint16 buffer;
SEEDDM642_UART_Handle SEEDuartHandleA;
SEEDDM642_UART_Handle SEEDuartHandleB;
/*此程序可将四个采集口的数据经过Video Port0送出*/
void main()
{
/*-------------------------------------------------------*/
/* perform all initializations */
/*-------------------------------------------------------*/
/*Initialise CSL，初始化CSL库*/
CSL_init();
/*----------------------------------------------------------*/
/*EMIFA的初始化，将CE0设为SDRAM空间，CE1设为异步空间
注，DM642支持的是EMIFA，而非EMIF*/
EMIFA_config(&Seeddm642ConfigA);
/*----------------------------------------------------------*/
IRQ_globalDisable();
IRQ_Reset(IRQ_EVT_EXTINT5);
IRQ_nmiEnable();
IRQ_enable(IRQ_EVT_EXTINT5);
IRQ_globalEnable();
/*中断向量表的初始化*/
//Point to the IRQ vector table
/*测试串口A*/
/* Open UART */
SEEDuartHandleA = SEEDDM642_UART_open(SEEDDM642_UARTA,
SEEDDM642_UART_BAUD9600,
&UartConfig);
/*Open UARTB*/
SEEDuartHandleB = SEEDDM642_UART_open(SEEDDM642_UARTB,
SEEDDM642_UART_BAUD9600,
&UartConfig);
printf("Uart Test Begin...
");
}
interrupt void uart_isr(void)
{
Uint16 Data_Temp;
Data_Temp = SEEDDM642_UART_rget(SEEDuartHandleA,0);
printf("DATA : %x
",Data_Temp);
}
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