SX is good for you…
January 31st, 2007Sorry.
I could not resist.
But the fact is, I am finding the SX Tech Tool kit LITE I won in an ebay auction (it came without a key ring, perhaps the seller bought the items before it was included) to be a fascinating toy.
Yes, the memory capacity is limited.
True, the native instruction set is very primitive – although the IDE’s assembler tries hard to hide it with “instructions” (essentially built in macro’s) that are far more orthogonal and civilized that actually emit two native instructions; this is generally an excellent approach, with only two major gotcha’s:
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- You have to check the listing file to see how many instructions you are actually using; so be very careful if you are trying to make very precisely timed deterministic code
- Be very careful of using the W register with native instructions with the “new” instructions – a LOT of the “new” mnemonics end up clobbering the contents of W
I also took a quick peek at SX/B – and I was pleasantly surprised. It is a more capable small Basic compiler than I thought it would be! Frankly, I far prefer Spin, but SX/B is an excellent way for people new to microcontrollers to get their feet wet – and let’s face it, the SX architecture is NOT suitable for C compilers. I shudder to think what the code generator would look like. Personally, I’ll stick with the excellent assembler.
But guess what… even with all those limitations… I bought a second SX Key, a Key Ring, five SX48 Proto boards and ten SX28 Dip’s (to accompany the two Sceanix labeled SX28’s I have). I think the SX’s are going to make excellent high speed I/O coprocessors for some Propeller projects I am slowly (very slowly… due to working too much for the past few months) working on.
Stay tuned!
