Has anyone tried AI with PICBASIC

[richard]

I don't see any issues with IC address - it is done according to datasheet.

1. Write to Config register:
– First byte: 0b10010000 (first 7-bit I2C address followed by a low R/W bit)
– Second byte: 0b00000001 (points to Config register)
– Third byte: 0b10000100 (MSB of the Config register to be written)
– Fourth byte: 0b10000011 (LSB of the Config register to be written

when has a 7 bit i2c slave address ever worked in pbp?

[CuriousOne]

Does manual say anywhere that it won't ?

[Ioannis]

When manual says byte sized variables, it is implied 8 bits I guess.

Ioannis

[CuriousOne]

So this IC can't be used with PBP ?

[Ioannis]

I cannot see how one can send only 7 bits when the integrated command is set to send 8 bits...

I think you have to make your own routine, maybe in assembly.

Ioannis

[richard]

I think you have to make your own routine, maybe in assembly.

or convert the 7 bit address to an 8 bit address as i have explained multiple times in other posts

[richard]

just spotted this gem on the arduino forum

you need to know better than the AI in order to know that the solution offered by the AI is wrong

[Ioannis]

It makes perfectly sense!

One cannot blindly trust the machine. The replies depend very much on the prompt anyway. So, if you do not how to ask or what to ask, then you cannot expect magic to happen, right?

Ioannis

[CuriousOne]

I would say, that for relatively simple coding routines, PBP knowledge of AI had been improved, but just when you ask something more complex, you'll get this:

can you create picbasic pro code which will draw a circle on a LCD screen, which uses ST7920 controller?

(I'm omitting some DEFINE's and other non-relevant stuff)

' Initialize LCDLCDINIT' Main program loopMain:    ' Clear display    LCDOUT $01    ' Set cursor to home    LCDOUT $02    ' Set display to graphics mode    LCDOUT $3F    ' Set start line to 0    LCDOUT $40    ' Set display start line    LCDOUT $C0    ' Draw circle    CIRCLE 64, 32, 20

[CuriousOne]

It makes very human-like errors.

For example, I asked it how to convert the time from GPS receiver, which simply outputs digits in ASCII format to raw decimal digits, and here's the code:

hours = (time_data[0] - "0") * 10 + (time_data[1] - "0")minutes = (time_data[2] - "0") * 10 + (time_data[3] - "0")

It assumed that "0" is the raw value of ASCII digit "0" In ZX Spectrum Basic it would be VAL("0"), but in PBP there's not VAL...

Interesting, is there any other syntax of basic, which treats "0" as it's decimal value in ASCII table?

[Ioannis]

Minus "0" means in fact -48.

Maybe this is what is needed by the rest of the program. With just this line I am not sure if it is right or wrong.

As always, answer depends on the prompt. If you give enough and precise info you will get better response.

Ioannis

[CuriousOne]

yes sure, I changed "0" to 48 and everything works fine.
The question is, from where it took "0", is there any programming language that can make ASCII to decimal conversion that way?

[Ioannis]

In every language "0" is equal to 48 dec. or "1" equal to 49, etc.

Ioannis

[HenrikOlsson]

What do you mean you changed "0" to 48 and it worked? I'm sure it worked fine with "0".
You must stop mixing up the interpreted ZX BASIC with PBP.

In PBP lingo
48
$30
%00110000
"0"
are all representing the exact same thing, just differently for human readability.
If you were to connect to 8 LEDs to PortB of your PIC and then do PortB = x where x is any of the above they would all result in the exact same thing being displayed on the LEDs.

So, in your specific example subtracting "0" will subtract the numeric value 48 from the numeric value of the ASCII code for the digit question. This will result a numeric value equal to that of 'the digit'.

[richard]

The question is, from where it took "0", is there any programming language that can make ASCII to decimal conversion that way?

nearly all can do that, except that in C,C++ etc it would be '0' not "0" [single quotes is a chr 'literal' double quote is a null terminated "string" c-str]

[CuriousOne]

I'm not mixing, but with PBP

X-"0" gives syntax error while compiling.

[Ioannis]

I am pretty sure it does not. Compiles just fine because "0" is in fact 48. So if X-48 compiles it will also compile X-"0".

If course to have correct results you should not mix 0 (zero) with O (capital letter O) because they have different ascii value. But all compile fine.

Ioannis