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AW32 IIC 做从机,产生不了中断<br /><br />首先看一下我计算其分频因子是否有错误:<br /><br /> MCU clock speed: 3706000 Hz<br />Block Module Name Address Range Status<br /> 0 FLASH 8000 - FFFF Programmed - Unselected<br /><br />希望得到100K速率<br /><br />100 000 = 3706000/(mul*SCL分频数)<br /><br />当mul = 01时,SCL分频数 = 37.06<br /><br />查表(Table 13-3. IIC Divider and Hold Values)<br />当SCL分频数36最接近的,即取ICR = 0X0A SDA的保持时间为9<br /><br />从而得IIC1F = 0x0A<br /><br /><br />程序如下,我用已经好的主机通过IIC去访问该从机,为什么就是产生不了中断,进不了IIC_ISR函数<br /><br />#define DEVICE_I2C_ADR 0x40<br /><br />void IIC_init(void)<br />{<br /> IIC1C = 0x00; //禁止IIC模块<br /> IIC1F = 0x0A; //设成100K<br /> IIC1A = DEVICE_I2C_ADR;//设从机地址<br /> IIC1S = 0x12; //状太寄存器<br /> IIC1C = 0xC8;<br /> //IIC1C_IICEN = 1; //IIC模块使能<br /> //IIC1C_IICIE = 1; //中断使能<br /> //IIC1C_MST = 0; //IIC模块设为从机<br /> //IIC1C_TXAK = 0;<br />}<br /><br />interrupt VectorNumber_Viic1 void IIC_ISR(void)<br />{<br /> unsigned char dummy_dat;<br /> <br /> IIC1S_IICIF = 1; //清除中断标志位<br /> <br /> if(IIC1C_MST == 0) //是设成从机吗? 不参与仲裁....<br /> {<br /> if(IIC1S_IAAS == 1) //从机地址匹配吗?<br /> {<br /> }<br /> else <br /> {<br /><br /> }<br /> }<br /> else //设成主机吗?<br /> {<br /> }<br />}<br /> |
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