[minima] Re: Testing the digital board
- From: farhanbox@xxxxxxxxx
- To: minima@xxxxxxxxxxxxx
- Date: Thu, 6 Feb 2014 09:36:02 +0000
The initial junk on the display is the dump of the si570 regs
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-----Original Message-----
From: Mark G0MGX <mark.g0mgx@xxxxxxxxx>
Sender: minima-bounce@xxxxxxxxxxxxx
Date: Thu, 06 Feb 2014 08:02:05
To: <minima@xxxxxxxxxxxxx>
Reply-To: minima@xxxxxxxxxxxxx
Subject: [minima] Re: Testing the digital board
Hi Team
The code gets stuck reading and writing data to/from the Si570 without
it connected, so without modification you don't actually get anything on
the LCD until the interface is working!
As others have suggested you can confirm the LCD function first with
something simple that uses the same pins:
and then, once this code is running, you can load the Minima sketch and
simply check that the voltage on the si570 interface pins isn't at 5V
with a DMM.
Alternatively, you could comment out these in the startup() routine:
i2c_write(si570_i2c_address,135,0x01);
read_si570();
setDCO(26150000L);
and this in the loop() routine:
setDCO(frequency+ IF_FREQ);
Then you should be able to see stuff on the LCD screen and do the
voltage checks.
Mark
G0MGX
On 06/02/2014 02:40, jerry@xxxxxxxxxxxxxxxx wrote:
> I finished building the Digital board except for soldering in the si570.
> I would like to test the radiono code and make sure I made the right
> comments in the file so I don't fry the si570. I fired up the board and
> all the voltages are good: 4.92 out of the 7805 and 3.24 out of the
> LM1117, but I would like to run the code and check the 570's voltage. I
> uploaded the radiono sketch to the chip using a Arduino Uno board, and
> put the chip in my Digital board, and powered it up. All that happens
> is the LCD backlight lights, but no characters. The contrast pot works.
> The circuit draws 24ma but no display. Do I need to do something else.
> There is another code file on github, what is that for? Jerry
> K5LRU
> Harwood, Texas
>
>
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