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多功能调试测试助手-精密电压源AD5791

2015-1-20 18:33:14 4114

0 多功能调试测试助手-精密电压源AD5791 环境说明：CubeSuites+ 文件： AD5791.c AD5791.h 函数： AD57XX_Init(AD5791); void AD57XX_SetRegisterValue(unsigned char registerAddress, unsigned long registerValue) unsigned char SPI_Write(unsigned char* data,unsigned char bytesNumber)void AD57XX_SetDacValue(unsigned long value) 细列： unsigned char AD57XX_Init(char deviceVersion){ unsigned char status = 0; unsigned int i; AD5791_CLR_H; //清零 AD5791_LDAC_H; //不加载输出 AD5791_RESET_L; //复位AD5791 for(i=0;i<2000;i++) {NOP();} AD5791_RESET_H; for(i=0;i<2000;i++) {NOP();} switch(deviceVersion) { case AD5760: deviceBitNumber = 16; break; case AD5780: deviceBitNumber = 18; break; case AD5781: deviceBitNumber = 18; break; case AD5790: deviceBitNumber = 20; break; case AD5791: deviceBitNumber = 20; break; } AD57XX_SetRegisterValue(AD57XX_REG_CTRL,AD57XX_CTRL_RBUF\|AD57XX_CTRL_BIN2SC\|AD57XX_CTRL_SDODIS\|AD57XX_CTRL_LINCOMP(AD57XX_LINCOMP_12V_SPAN)); //配置AD5791控制寄存器：不用内部放大器A1，偏移二进制编码（直接关系输出值） return(status); } //设置寄存器值 //unsigned char registerAddress：寄存器地址 //unsigned long registerValue：寄存器配置值 void AD57XX_SetRegisterValue(unsigned char registerAddress, unsigned long registerValue) { unsigned char writeCommand[3] = {0, 0, 0}; unsigned long spiWord = 0; spiWord = AD57XX_RW_(0) \| AD57XX_ADDR_REG(registerAddress) \| registerValue; writeCommand[0] = (spiWord & 0xFF0000) >> 16; writeCommand[1] = (spiWord & 0x00FF00) >> 8; writeCommand[2] = (spiWord & 0x0000FF); SPI_Write( writeCommand, 3); } //同步串行通讯写 unsigned char SPI_Write(unsigned char* data,unsigned char bytesNumber) { unsigned char i=0,j=0; AD5791_SYNC_L; for(j=0;j { for(i=0;i<8;i++) { if ((data[j]&0x80)==0x80) {AD5791_SDIN_H;} else {AD5791_SDIN_L;} AD5791_SCLK_L; NOP(); NOP(); NOP(); NOP(); NOP();NOP(); NOP(); NOP(); NOP(); NOP(); AD5791_SCLK_H; NOP(); NOP(); NOP(); NOP(); NOP();NOP(); NOP(); NOP(); NOP(); NOP(); data[j]<<=1; } } AD5791_SYNC_H; } 复制代码 0
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