我想实现stm8 硬件IIC 双机通信 主机已经测试过可以读写24C02，但是改为双机通信时（主机主模式写从机从模式读） ，从机用中断，无法实现。ST-LINK仿真发现主机停在while(!(I2C_SR1&0x02)); 从机没有进入中断 ，请牛人看看是什么问题，非常感谢。
主机程序
#include"stm8s103f3p.h"
void CLK_Init(void) //时钟为16M
{
CLK_CKDIVR = 0x00;
}
void IIC_Init(void)//IIC初始化设置 100KHZ
{
I2C_CR1 = 0x00; //禁止I2C外设
I2C_FREQR = 0x0a;
I2C_CCRH = 0x00;
I2C_CCRL = 0x32;
I2C_TRISER = 0x04;
I2C_CR2 |=0x04;
I2C_CR1 |=0x01
}
void IW_24C02(unsigned char x) //IIC主模式写一个字节
{
unsigned char temp;
//I2C_CR2 &=~ 0x04;
while(I2C_SR3 & 0x02); //总线空闲
I2C_CR2 |= 0x01; //产生起始位
while(!(I2C_SR1 & 0x01)); //起始位发送完成
I2C_DR = 0xa0;
while(!(I2C_SR1&0x02));
temp = I2C_SR1;
temp = I2C_SR3;
I2C_DR = 0x00;
while(!(I2C_SR1 & 0x84));
I2C_DR = x;
while(!(I2C_SR1 & 0x84));
I2C_CR2 |= 0x02;
// I2C_CR2 |= 0x04;
}
void delay (unsigned int x)//延时
{
unsigned int i;
for(i=x;i>0;i--);
}
main()
{
unsigned char dirflag,k,h,u;
CLK_Init();
GPIO_Init();
IIC_Init();
while(1)
{
IW_24C02(3);
delay(200000);//延时很重要
}
}
以上 主机可以读写24C02
从机 程序如下；
#include"stm8s103f3p.h"
void CLK_Init(void) //时钟为16M
{
CLK_CKDIVR = 0x00;
}
void IIC_Init(void)//IIC初始化设置 100KHZ
{
I2C_CR1 = 0x00; //禁止I2C外设
I2C_FREQR = 0x0a;
I2C_CCRL = 0x32;
I2C_CCRH = 0x00;
I2C_TRISER = 0x04;
I2C_OARL = 0xa0; //自身地址
I2C_OARH = 0x40;
I2C_CR2 |=0x04;
I2C_CR1 |=0x01;
I2C_ITR=0x06;//开IIC中断
}
void delay (unsigned int x)
{
unsigned int i;
for(i=x;i>0;i--);
}
main()
{
unsigned char dirflag,k,h,u;
_asm("sim");
CLK_Init();
GPIO_Init();
IIC_Init();
_asm("rim");
while(1)
{
}
}
@far @interrupt void iic_irq(void)
{
while(!(I2C_SR1 & 0x02));
temp1 = I2C_SR1;
temp2 = I2C_SR3;
temp= I2C_DR ;
while(!(I2C_SR1 & 0x84));
I2C_CR2 |= 0x02;
//dispp();
}
仿真一直没有进入中断，
下面是stm8_interrupt_vector的修改；
/* BASIC INTERRUPT VECTOR TABLE FOR STM8 devices
* Copyright (c) 2007 STMicroelectronics
*/
typedef void @far (*interrupt_handler_t)(void);
struct interrupt_vector {
unsigned char interrupt_instruction;
interrupt_handler_t interrupt_handler;
};
@far @interrupt void NonHandledInterrupt (void)
{
/* in order to detect unexpected events during development,
it is recommended to set a breakpoint on the following instruction
*/
return;
}
extern void _stext(); /* startup routine */
@far @interrupt void iic_irq(void);
struct interrupt_vector const _vectab[] = {
{0x82, (interrupt_handler_t)_stext}, /* reset */
{0x82, NonHandledInterrupt}, /* trap */
{0x82, NonHandledInterrupt}, /* irq0 */
{0x82, NonHandledInterrupt}, /* irq1 */
{0x82, NonHandledInterrupt}, /* irq2 */
{0x82, NonHandledInterrupt}, /* irq3 */
{0x82, NonHandledInterrupt}, /* irq4 */
{0x82, NonHandledInterrupt}, /* irq5 */
{0x82, NonHandledInterrupt}, /* irq6 */
{0x82, NonHandledInterrupt}, /* irq7 */
{0x82, NonHandledInterrupt}, /* irq8 */
{0x82, NonHandledInterrupt}, /* irq9 */
{0x82, NonHandledInterrupt}, /* irq10 */
{0x82, NonHandledInterrupt}, /* irq11 */
{0x82, NonHandledInterrupt}, /* irq12 */
{0x82, NonHandledInterrupt}, /* irq13 */
{0x82, NonHandledInterrupt}, /* irq14 */
{0x82, NonHandledInterrupt}, /* irq15 */
{0x82, NonHandledInterrupt}, /* irq16 */
{0x82, NonHandledInterrupt}, /* irq17 */
{0x82, NonHandledInterrupt}, /* irq18 */
{0x82, iic_irq}, /* irq19 */
{0x82, NonHandledInterrupt}, /* irq20 */
{0x82, NonHandledInterrupt}, /* irq21 */
{0x82, NonHandledInterrupt}, /* irq22 */
{0x82, NonHandledInterrupt}, /* irq23 */
{0x82, NonHandledInterrupt}, /* irq24 */
{0x82, NonHandledInterrupt}, /* irq25 */
{0x82, NonHandledInterrupt}, /* irq26 */
{0x82, NonHandledInterrupt}, /* irq27 */
{0x82, NonHandledInterrupt}, /* irq28 */
{0x82, NonHandledInterrupt}, /* irq29 */
};
不只是哪里有问题 ，请牛人指导，谢谢 本人刚用STM8。
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