AS1130 First attempt - working

Well like I said...it is C code but unfortunately I'm not familiar with your compiler...if it's ANSI C you shouldn't have too much trouble.

How well do you understand the registers in your processor?

It's fairly easy to write routines to implement I2C in C but I'm sure your compiler will have routines for this. :wink:

EDIT:

I'm going to make a suggestion which you may or may not like....

Why don't you buy yourself an Arduino board, then you'll have 1000's of expert programmers there to help not only with the hardware side but the C programming as well.
I bought a genuine UNO for £16 on eBay but I'm sure there are cheaper versions (not that I'd recommend a Chinese rip off) or it's very easy to build one yourself. You can even buy the chips with the bootloader installed. :wink:

Here we are...free cable and free postage.
http://www.ebay.co.uk/itm/Arduino-UNO-R3-V3-0-ATMEGA328-FREE-USB-CABLE-Dev-Module-Ideal-4-Robotics-Rev-3-/321017689679?pt=UK_Computing_Other_Computing_Networking&hash=item4abe25364f

Well...I wish you good luck with that!

As this is the Arduino Forum I doubt you'll get much help with porting code.
If it was from another compiler to the Arduino platform you would get loads of help.
I have shown you some of the things that you can do with the AS1130 and will continue to write code for it until I get fed up or move on to another interesting project but you can't expect me or anyone else to try to help you with coding using a compiler/language/chip that has nothing to do with the Arduino. (not on this Forum anyway)

If I were you, I'd get an Arduino....problem solved.

Otherwise, I don't see that you can progress much further in this Forum and I'm not aware of any help forums for your compiler.

Update on the IRQ problem:

Still haven't managed to set the address pointer to the correct register using wire but 1 major issue is solved.

The Control register address words are not contiguous...they read from 0x00 to 0x0B skip 2 then start at 0x0E again. so reading 14 bytes does not read all the registers as in my code but only reads as far as the 2 unused registers 0x0C & 0x0D. This means the IRQ status is never read and hence the IRQ pin is never cleared!

Oh well...I'm always telling people to RTF datasheets...... :astonished:

At least now I can get on with the 24 x 22 matrix when the parts arrive from China. :grin:

Interesting, I'll have read the datasheet (again!) to understand.

How long do you think it'll take for them to arrive?
Usually takes about 25 days for me

Have a look at Table 13 reg. addresses...I had noticed it before but it didn't sink in that there were 2 addresses missing.

The veroboards arrived today and I already have about 400 LEDs so I'll be making a start pretty soon... :grin:

BTW it usually takes between 10 and 28 days to the UK.

The software shutdown is implemented by the LSb of the Shutdown open short register.
Hardware shutdown is implemented by the RSTN pin.

According to the datasheet all the RSTN lines are connected together for all chips.

Obviously, the Shutdown open short register is different for each chip...so you need to send 3 commands for 3 chips. :wink:

The decision you have to make is whether you want to seperately Hard reset each AS1130 or whether you want to do them all at once. In the first case you need 3 dedicated pins, in the second only 1.

Or

You can leave the RSTN pins clear of the MCU and just use a button (this is what I have done)

You can hard reset all the chips by connecting the RSTN lines together and pulling them to GND.

You can do this either with the MCU or a button (or both)


There is no way of soft resetting all the chips using one command.

Each chip has it's own Shutdown register and you have to clear the shdn bit in each chip seperately.


There might be a way of resetting them all with software but I haven't tried it and the datasheet is not clear about it but you can get all the chips to respond on the same address which may mean that one write to the Shutdown reg. will do them all. You'll have to try it to find out. :grin:

binarygod:
Answer/Question on your first paragraph:

see attachment!
so if I connect the switch like in the attachment, I can to a hardware reset with the uC AND with the switch if I understood well?


Correct!

Answer/Question on your second paragraph:

I think I missunderstood you! you meant with "to send 3 commands for 3 chips" that when I send data to the first driver I have to send first his adress and then all HIS registers (with his own Shutdown register) with THEIR specific bits, then when I send data to the second driver I have to send first his adress and then his registers (with his own Shutdown register) etc?


You don't HAVE to send all the data to each chip to reset it...you just need to write to the Shutdown register.

In the end I have three methods to reset them??? :
software with their own register, and hardware with a switch & with the uC?

Yep!

I'll let you know about the IRQ when I have my 24x22 matrix finished, but you MUST clear the IRQ by reading the IRQ status register before you can use it AND after every interrupt generated.

I'm thinking that I'll use the MCU to do the timing...but I can't experiment until I've built the boards. 8)

No...if you're not using them you can leave them floating. :grin:

You have to connect the RSTN lines to a pullup resistor and to the switch, so the RSTN lines are pulled up not floating.

It's exactly as your schematic but not connected to the MCU pin.

That looks OK if you want to have a separate switch to reset the 1130s.

If you also want to reset them under program control you run the "separate Pin" wire to an output on the Arduino and pull that output LOW to reset the chips.


Rob

You got it.... :grin:

@Rob
Hello Mr Nomad! I don't know if you've read all this thread but I've sorted out the IRQ line problem. :blush: :.

This is turning into a bigger thread than one of the famous "random number" ones :slight_smile:

I don't remember what the IRQ problem was now but but good that you nailed it.


Rob

That's very true...but why connect them to a resistor if they are not being used?

The statemachine of the AS1130s at Power on pulls the IRQ line to GND so it's not really floating anyway. :stuck_out_tongue:

Just noticed...3830 reads.... :astonished:

I wonder if anyone is actually using this chip apart from us 3.... :grin:

That's what I've done with my first test module...all the pullups are there but the RSTN and IRQ are not used.

I bet they're all using our ideas but are too shy to post.... ]:smiley: ]:smiley:

It sure will... :wink:

URGENT probably for you guys anyway. :grin:

I've just discovered that pin18 (VDD) is NOT connected to the other VDD pins.

All the others are connected together as are the GND pins (all of 'em)

Okay

Please could you post here if you are interested in further developments with the AS1130 as I'm getting a bit frustrated with the Arduino method of development and debugging.

This is due to my lack of knowledge of the system, but I don't see any point in continuing with this if nobody is interested (I'll carry on but with a USB enabled PIC18F4550 happily on my own.)

Cheers. :wink: