Forum Discussion
Honored Contributorhow to configure & initiate one FPGA by using another FPGA?
through a JTAG...
Is there any detailed timing diagrams ? Thanks in advance!13 Replies
Altera_ForumYes, and I do this all the time. If FPGA# 1 is configuring FPGA# 2, use four I/O pins from# 1 and connect them to dedicated JTAG pins of# 2. Then to program the FPGA# 2 directly, you can use the industry standard SVF file and Altera's Jrunner software to bit bang the I/O pins. In addition, if you want FPGA# 1 to program an EPCS flash, connect I/O pins from# 1 to Active Serial port of EPCS flash, and then you can use the RPD file and again Altera's Jrunner software to bit bang the active serial pins in FPGA# 1. Both the SVF and RPD file can be converted from SOF and POF using the Altera's conversion tool in Quartus II.
--- Quote Start --- through a JTAG... Is there any detailed timing diagrams ? Thanks in advance! --- Quote End ---- Altera_Forum--- Quote Start --- I reviewed AN418 and found, that it actually describes EPCS chip programming rather than FPGA passive serial configuration. I apalogize for the confusion. Most people use binary *.rbf files or e.g. *.ttf for passive serial. --- Quote End --- Thanks for your kindness and no need to apologize at all !!!
- Altera_Forum--- Quote Start --- I don't see such file type output like .rpd in available options. Are You sure it's FPGA bitstream image? I've tested using .ttf and bitbanging it from microcontroller - works fine. --- Quote End --- Thanks. Did you ever try the .hex file to configure and initiate ?
- Altera_Forum
I reviewed AN418 and found, that it actually describes EPCS chip programming rather than FPGA passive serial configuration. I apalogize for the confusion. Most people use binary *.rbf files or e.g. *.ttf for passive serial.
- Altera_Forum
I don't see such file type output like .rpd in available options. Are You sure it's FPGA bitstream image? I've tested using .ttf and bitbanging it from microcontroller - works fine.
- Altera_Forum--- Quote Start --- SRunner project, see AN418. --- Quote End --- I read the AN418, it seems that the file format there is .rpd, however, my source file is in the format of .hexout..... and the configuration handbook only mentions .rbf .sof .pof .hexout .jam.... what is .rpd ?
- Altera_Forum
okay, I will read it soon, thank you very much !
- Altera_Forum
SRunner project, see AN418.
- Altera_Forum
thanks for your quick reply, I will try to find if there are enough documents....
- Altera_Forum
This should be documented on altera.com, but I've heard that people using this mode up to relatively high speeds (10Mbps?)... So I doubt timing will be issue here :)
