但用bios 方式中断却没有中断产生不知为什么，下面这个程序有错吗？<br />我买的开发板，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.<br /><br />#include <csl.h><br />#include <csl_emifa.h><br />#include <csl_irq.h><br />#include <csl_chip.h><br />#include "stdio.h"<br /><br />#include "seeddm642.h"<br />#include "seeddm642_uart.h"<br /><br />/*SEEDDM642的emifa的设置结构*/<br />EMIFA_Config Seeddm642ConfigA ={<br /> 0x00052078,/*gblctl EMIFA(B)global control register value */<br /> /*将CLK6、4、1使能；将MRMODE置1；使能EK2EN,EK2RATE*/<br /> 0xffffffd3,/*cectl0 CE0 space control register value*/<br /> /*将CE0空间设为SDRAM*/<br /> 0x73a28e01,/*cectl1 CE1 space control register value*/<br /> /*Read hold: 1 clock;<br /> MTYPE : 0000,选择8位的异步接口<br /> Read strobe ：001110；14个clock宽度<br /> TA：2 clock; Read setup 2 clock;<br /> Write hold :2 clock; Write strobe: 14 clock<br /> Write setup :7 clock<br /> -- ---------------<br /> 14c /1c<br /> ----------------/ */<br /> 0x22a28a22, /*cectl2 CE2 space control register value*/<br /> 0x22a28a42, /*cectl3 CE3 space control register value*/<br /> 0x57115000, /*sdctl SDRAM control register value*/<br /> 0x0000081b, /*sdtim SDRAM timing register value*/<br /> 0x001faf4d, /*sdext SDRAM extension register value*/<br /> 0x00000002, /*cesec0 CE0 space secondary control register value*/<br /> 0x00000002, /*cesec1 CE1 space secondary control register value*/<br /> 0x00000002, /*cesec2 CE2 space secondary control register value*/<br /> 0x00000073 /*cesec3 CE3 space secondary control register value*/ <br />};<br /><br />SEEDDM642_UART_Config UartConfig ={<br /> 0x01,/*寄存器IER*/<br /> 0x57,/*寄存器FCR*/<br /> 0x03,/*寄存器LCR*/<br /> 0x08,/*寄存器MCR*/<br />};<br /><br />extern far void vectors();<br /><br />Uint8 IOreadback;<br />Uint16 buffer;<br />SEEDDM642_UART_Handle SEEDuartHandleA;<br />SEEDDM642_UART_Handle SEEDuartHandleB;<br /><br />/*此程序可将四个采集口的数据经过Video Port0送出*/<br />void main()<br />{<br /> <br />/*-------------------------------------------------------*/<br />/* perform all initializations */<br />/*-------------------------------------------------------*/<br /> /*Initialise CSL，初始化CSL库*/<br /> CSL_init();<br />/*----------------------------------------------------------*/<br /> /*EMIFA的初始化，将CE0设为SDRAM空间，CE1设为异步空间<br /> 注，DM642支持的是EMIFA，而非EMIF*/<br /> EMIFA_config(&Seeddm642ConfigA);<br />/*----------------------------------------------------------*/<br /> IRQ_globalDisable();<br /> IRQ_nmiEnable();<br /> <br /> IRQ_enable(IRQ_EVT_EXTINT5);<br /> IRQ_globalEnable(); <br /> /*中断向量表的初始化*/<br /> //Point to the IRQ vector table<br /> <br /> <br />/*测试串口A*/<br /> /* Open UART */<br /> SEEDuartHandleA = SEEDDM642_UART_open(SEEDDM642_UARTA, <br /> SEEDDM642_UART_BAUD9600, <br /> &UartConfig);<br /> /*Open UARTB*/<br /> SEEDuartHandleB = SEEDDM642_UART_open(SEEDDM642_UARTB, <br /> SEEDDM642_UART_BAUD9600, <br /> &UartConfig);<br /> IRQ_setVecs(vectors);<br /> printf("Uart Test Begin...
");<br /><br />}<br /><br /> interrupt void uart_isr(void)<br /> {<br /> Uint16 Data_Temp;<br /> Data_Temp = SEEDDM642_UART_rget(SEEDuartHandleA,0);<br /> printf("DATA : %x
",Data_Temp);<br /> } <br />
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