我在用dm642的开发板,通过TL16C752B 实现485串口通信,现在需要一个串口中断程序。
自己也做了一些工作,比如asm的配置,用的是vector 5 ,
程序中,用的是,irq_evt_extint5,
也配置好了,752的寄存器,比如ier=0x03,mcr=0x08;fcr=0x57;lcr=0x03;
但是,就是触发不了中断,不知道为什么?求帮助。
同时,对如何触发串口中断也存在疑问。大家帮我看一下吧,555,我实在是没辙了,不知道原因在哪啊。
/********************************************************************/
/* Copyright 2006 by VisionMagic Ltd. /
/ All rights reserved. Property of VisionMagic Ltd. /
/ Restricted rights to use, duplicate or disclose this code are /
/ granted through contract. /
/*******************************************************************/
#include
#include
#include
#include
#include
#include
#include
#include "vmd642.h"
#include "vmd642_uart.h"
/*VMD642-A的emifa的设置结构*/
EMIFA_Config g_dm642ConfigA ={
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*/
0x57116000, /*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*/
};
VMD642_UART_Config g_uartConfig ={
0x03,/*寄存器IER*/
0x57,/*寄存器FCR*/
0x03,/*寄存器LCR*/
0x08,/*寄存器MCR*/
};
extern far void vectors();
VMD642_UART_Handle g_uartHandleA;
Uint16 cout=0;
char* p_RT485 = (char*)0x9008001D;
void main()
{
// int cnt = 0, total = 0;
/*-------------------------------------------------------*/
/* perform all initializations */
EMIFA_config(&g_dm642ConfigA);
//Initialise CSL
CSL_init();
g_uartHandleA = VMD642_UART_open(VMD642_UARTB,
UARTHW_VMD642_BAUD_9600,
&g_uartConfig);
IRQ_setVecs(vectors);
IRQ_globalEnable();
IRQ_nmiEnable();
IRQ_map(IRQ_EVT_EXTINT5, 5);
//Reset the timer events
IRQ_reset(IRQ_EVT_EXTINT5);
IRQ_enable(IRQ_EVT_EXTINT5);
/*----------------------------------------------------------*/
/*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*/
/*----------------------------------------------------------*/
/*中断向量表的初始化*/
// GPIO_RSET(GPGC, 0x0);
/*将GPIO5做为输入*/
// GPIO_RSET(GPDIR, 0x00);
/*GPIO0输出为高,选择IIC0总线*/
// GPIO_RSET(GPPOL, 0x0);
// GPIO_RSET(GPVAL, 0x0);
// GPIO_RSET(GPEN, 0x20); //shineng GPIO5
/*----------------------------------------------------------*/
/*测试串口A*/
/* Open UART */
while(1){
*p_RT485 = 1;
VMD642_UART_putChar(g_uartHandleA, (cout++&0xff));
VMD642_waitusec(200);}
}
interrupt void Uartio(void)
{
Uint16 tmp=0;
*p_RT485 = 0;
tmp=VMD642_UART_getChar(g_uartHandleA);
VMD642_waitusec(20);
printf("%d\n",tmp);
printf("i am here \n");
VMD642_waitusec(10);
return;
}