部分代码如/* 本测试例程（满量程40A）针对1000：1电流互感器进行简易校表，offset校正，并输出ABC三相电流有效值。*/
/* A5--->RN7302_SCK */
/* A6--->RN7302_SDO */
/* A7--->RN7302_SDI */
#define RN7302_CS PAout(4) //RN7302_CS 使能
u8 RN7302_Read(u16 wReg,u8 *pBuf) //00计量参数寄存器，01配置和状态寄存器
{
u8 temp;
RN7302_CS=0;
SPI1_ReadWriteByte(wReg); //发送读取寄存器地址
temp = (((u8)(wReg >> 4)) & 0xf0)^0xff + 0x10;
SPI1_ReadWriteByte(temp); //发送读取寄存器地址
delay_us(10);
pBuf[0]=SPI1_ReadWriteByte(0xff);
pBuf[1]=SPI1_ReadWriteByte(0xff);
pBuf[2]=SPI1_ReadWriteByte(0xff);
pBuf[3]=SPI1_ReadWriteByte(0xff);
RN7302_CS=1;
return(1);
}
void RN7302_Write(u16 wReg,u8 *pBuf,u8 DatLen) //00计量参数寄存器，01配置和状态寄存器
{
u8 num,temp;
u8 cs;
RN7302_CS=0;//开启片选
temp = (u8)(wReg & 0x00ff);
SPI1_ReadWriteByte(temp); //发送读取寄存器地址
temp = (((u8)(wReg >> 4)) & 0xf0) + 0x80;
SPI1_ReadWriteByte(temp); //发送读取寄存器地址
cs=wReg+temp;
delay_us(10);
for(num=0;num<DatLen;num++)
{
SPI1_ReadWriteByte(pBuf[num]);
cs+=pBuf[num];
}
cs=~cs;//0xFA
SPI1_ReadWriteByte(cs);//发送cs
RN7302_CS=1;//关闭片选
}
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RN7302测试例程-stm32.7z
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