LTC2400 SPI interface

[PUGALENTHI.P]

Hai friends,

am new to this world of processors,but started playing with the PIC 16f690.
for now am trying to communicate with LTC2400-24 bit ADC to the pic through the spi interface but i dont know where to start from.
please help me friends and thanks for reading the post.

PUGAL

[mackrackit]

I have not used that part but a quick look at the data sheet says you should be able to use the SHIFTIN command in Pic Basic Pro.

You posted in PIC BASIC. Is that what you are using or are you using the Pro version?

The 690 also has a built in ADC.

[PUGALENTHI.P]

I have not used that part but a quick look at the data sheet says you should be able to use the SHIFTIN command in Pic Basic Pro.

You posted in PIC BASIC. Is that what you are using or are you using the Pro version?

The 690 also has a built in ADC.

am using BASIC and oshonsoft compiler.
i tried using the internal adc and its worked but i want to communicate with external adc using spi interface.please help me my friend.

[mackrackit]

This is an example for EEPROMS
http://melabs.com/resources/samples/x1/pbp/spix.htm
You should be able to modify it for the ADC

[PUGALENTHI.P]

why the command set changes even all the codes are in basic language.In the article they are using shiftin and shift out but my compiler uses shiftright and shiftleft,why such a difference is needed.why am asking this is because they are using "sck" and i dont know what for they are using.as i mentioned above am new to this world(MPU), so i dont think you will laugh at me.

[mackrackit]

Most of us here use this to compile
http://store.melabs.com/prod/pbp.html
I am not familiar with oshonsoft compiler. I did not notice that you were using that earlier.

Basically you will have three pins on something like this.

DATA
CLOCK (SCK)
LATCH or Chip Select

[HenrikOlsson]

Because you are using the Oshonsoft compiler and "we" at this forum are using the MELABS PicBasicPro compiler (or PicBasicCompiler) - not the Oshonsoft BASIC compiler.

You need to "translate" the any examples not written for your compiler so the instructions matches your compilers instruction set. BASIC is not known for being the most standardised programming language. Most i spretty similar in the basic command set like GOTO, GOSUB, FOR-NEXT, WHILE_WEND etc but when it comes to all the "special commands" like SPI, PWM, LCD, etc etc each compiler has it's own way of handling it. There simply is no standard for those type of commands.

A quick look at the Oshonsoft site seems to indicate that what you are looking for is the [url=http://www.oshonsoft.com/picbasiccompilerreferencemanual.html#677] SPI Communication commands. Not ShiftLeft and ShiftRight - they are for shifting bits around in memory, not for shifting them in or out a pin.

Don't worry about beeing new to this, we've all been there at one time or another. However, you may get better help with your project by posting on the forum dedicated for the compiler you are using. Good luck!

/Henrik.