首先分析Chirp函数在频域上的一般特性,并且分析Altrea公司提供的数控振荡器知识产权核(NCO IP core)的输入/输出特性,通过MegaCore环境确定其输入控制字,通过外围逻辑电路实时向NCO IP core调入控制频率控制字以达到改变输出频率的目的...首先分析Chirp函数在频域上的一般特性,并且分析Altrea公司提供的数控振荡器知识产权核(NCO IP core)的输入/输出特性,通过MegaCore环境确定其输入控制字,通过外围逻辑电路实时向NCO IP core调入控制频率控制字以达到改变输出频率的目的,并通过在示波器上观测FPGA的运行情况,验证了该设计具有很好的输出效果。展开更多
The intellectual property （IP） core for inter-integrated circuit （IIC） bus controller is designed using finite state machine （FSM） based on field programmable gate array （FPGA）. Not only the data from AT 24C02...The intellectual property （IP） core for inter-integrated circuit （IIC） bus controller is designed using finite state machine （FSM） based on field programmable gate array （FPGA）. Not only the data from AT 24C02C can be read automatically after power on, but also the data from upper computer can be written into AT24C02C immediately under the control of the IIC bus controller. When it is applied to blast wave overpressure test system, the IIC bus controller can read and store working parameters automatically. In a laboratory environment, the IP core simulation is carried out and the result is accurate. In the explosion field test, by analyzing the obtained valid data, it can be concluded that the designed IP core has good reliability.展开更多
针对传统基于FPGA设计直接数字式频率合成器的方法存在的代码量大且使用较多的FPGA逻辑资源的不足,本文使用了一种基于Xilinx FPGA IP Core的DDS设计方法。直接调用已经封装好的DDS Core,无需编写DDS程序代码,只需熟悉core的接口定义和...针对传统基于FPGA设计直接数字式频率合成器的方法存在的代码量大且使用较多的FPGA逻辑资源的不足,本文使用了一种基于Xilinx FPGA IP Core的DDS设计方法。直接调用已经封装好的DDS Core,无需编写DDS程序代码,只需熟悉core的接口定义和操作方法。实际应用表明,该方法能够大大提高设计效率且使用较少的FPGA资源,输出信号具有失真度低、稳定度好、分辨率高等优点。展开更多
文摘首先分析Chirp函数在频域上的一般特性,并且分析Altrea公司提供的数控振荡器知识产权核(NCO IP core)的输入/输出特性,通过MegaCore环境确定其输入控制字,通过外围逻辑电路实时向NCO IP core调入控制频率控制字以达到改变输出频率的目的,并通过在示波器上观测FPGA的运行情况,验证了该设计具有很好的输出效果。
文摘The intellectual property （IP） core for inter-integrated circuit （IIC） bus controller is designed using finite state machine （FSM） based on field programmable gate array （FPGA）. Not only the data from AT 24C02C can be read automatically after power on, but also the data from upper computer can be written into AT24C02C immediately under the control of the IIC bus controller. When it is applied to blast wave overpressure test system, the IIC bus controller can read and store working parameters automatically. In a laboratory environment, the IP core simulation is carried out and the result is accurate. In the explosion field test, by analyzing the obtained valid data, it can be concluded that the designed IP core has good reliability.
文摘针对传统基于FPGA设计直接数字式频率合成器的方法存在的代码量大且使用较多的FPGA逻辑资源的不足,本文使用了一种基于Xilinx FPGA IP Core的DDS设计方法。直接调用已经封装好的DDS Core,无需编写DDS程序代码,只需熟悉core的接口定义和操作方法。实际应用表明,该方法能够大大提高设计效率且使用较少的FPGA资源,输出信号具有失真度低、稳定度好、分辨率高等优点。
