synthings

SYNTHINGS is a digital synthesizer development platform that I've been building.

Category: SYN1 - Initial test

SDRAM

Like the SRAM controller and rotary encoder, I'd done another project with SDRAM, so I knew roughly what to do. The only changes I needed to make was in the address space. The earlier SDRAM chip was 64Mbit; this was 256Mbit, so I had to add A[12].  (More)

User input

The switches and rotary encoder are fairly simple pieces of work to do - however, I wanted to use them instead of the debugging port (in conjunction with the LCD).   (More)

SRAM

Everything else on the board I had already done before - in one form or another, which is why I'd concentrated on the display first of all. Getting the LCD to show something useful would be the next stage, since I wouldn't need to rely on the RS232 for debugging.   (More)
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