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Altera_Forum
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14 years ago

Access custum module using IOWR

Hello, I am having trouble accessing to my module using niosII IOWR function.:cry: my logic is below: == module test_module( input clk, input wren, input[15:0] indata, output reg[15:0] outtd...
Altera_Forum's avatar
Altera_Forum
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14 years ago

You need to look at the addresses and 'byte enables', the 32bit write of 456 will generate two 16bit writes to your slave. Your slave will be latching the second write.

If you write 0x12345678 you should read back 0x1234.

Best to make your slave 32bits - ignore the high bits on writes and return 0 to reads.