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本设计是针对LEON3 Altera Nios II startix2
This leon3 design is tailored to the Altera NiosII Startix2
Development board, with 16-bit DDR SDRAM and 2 Mbyte of SSRAM.
As of this time, the DDR interface only works up to 120 MHz.
At 130, DDR data can be read but not written.
NOTE: the test bench cannot be simulated with DDR enabled
because the Altera pads do not have the correct delay models.
* How to program the flash prom with a FPGA programming file
1. Create a hex file of the programming file with Quartus.
2. Convert it to srecord and adjust the load address:
objcopy --adjust-vma=0x800000 output_file.hexout -O srec fpga.srec
3. Program the flash memory using grmon:
flash erase 0x800000 0xb00000
flash load fpga.srec-This leon3 design is tailored to the Altera NiosII Startix2
Development board, with 16-bit DDR SDRAM and 2 Mbyte of SSRAM.
As of this time, the DDR interface only works up to 120 MHz.
At 130, DDR data can be read but not written.
NOTE: the
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James Armstrong VHDL Design , source code
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调制解调器是在发送端通过调制将数字信号转换成模拟信号,而在接收端通过解调将模拟信号转换为数字信号的一种装置。这个程序用VHDL语言编写,实现了二进制振幅键控(2ASK)的调制与解调;二进制频移键控(2FSK)的调制与解调,二进制相位键控(2PSK)的调制与解调过程。
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