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Altera_Forum's avatar
Altera_Forum
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13 years ago

Writing to SRAM

Hi everyone, Does anyone have a tutorial that shows me how to write to Memory using SOPC? Thanks
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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I established an RS232 commuincation between PC and the Board and It was great. However, the RS232 program such as HyperTerminal, PuTTY, and Tera Time are not realiable! Sometimes I can transfer a whole file o.k and other times I can't ?!!!

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Can you confirm that its the PC that is the problem? Perhaps it is the FPGA. If the RS232 interface does not implement the CTS/RTS handshake wires, then you could be overrunning your buffers in the FPGA. What is processing your RS232 data; is it a state machine, or a NIOS II processor?

The tutorial I linked to shows how to use the JTAG interface to implement access to the board. Using master_write_memory and master_read_memory within system console, you can get about 600kbps (73kB/s) transfer rate.

Cheers,

Dave