【作者】 朱鹏； 唐万斌； 雷霞；

【Author】 Zhu Peng, Tang Wanbin, Lei Xia National Key Lab of Communication, UESTC, Chengdu 610054

【机构】 电子科技大学通信抗干扰技术国家级重点实验室；

【摘要】 在DSP+FPGA并举结构的信号处理系统中,FPGA通常作为接口和基带收发处理通道。对于AD- FPGA,以两级寄存对AD的数据输出指示信号DRY做上升沿检测,保证对输入准确采样;对于FPGA-DSP间跨时钟域的通信,在FPGA内开设乒乓Buffer为缓存,通过IRQ中断、控制字、状态字3种握手机制实现受控的 DMA传输、定时偏移和抽取。更多还原

【Abstract】 In the signal processing systems with a structure of DSP + FPGAB, FPGA performs the function of interfaces and Tx/Rx channels of baseband processing module. FPGA coordinates and buffers the communication among DSPs and AD/DA in different timing domains. Ping pang buffers, together with interrupts, control words and state words 3 handshake ways are used to realize controlled DMA, decimation and retiming. Two registers perfect the detection of posedge of DRY from AD.更多还原