877a and SPI

[tico]

I am looking for code examples to use SPI on the 877a I have searched a few times but the search engine complains that SPI is too short.

My long term goal is to interface with one of the dos on chip IC for sd cards available from sparkfun.com .

I have a project working using serial comm to a PC what I would like is the option to datalog using SPI so that I dont interfere with my serial link to the PC.

Any help would be greatly appreciated.
Thanks in advance.

[skimask]

I am looking for code examples to use SPI on the 877a I have searched a few times but the search engine complains that SPI is too short.

My long term goal is to interface with one of the dos on chip IC for sd cards available from sparkfun.com .

I have a project working using serial comm to a PC what I would like is the option to datalog using SPI so that I dont interfere with my serial link to the PC.

Any help would be greatly appreciated.
Thanks in advance.

http://www.picbasic.co.uk/forum/showthread.php?t=4751

[tico]

Thanks for the quick reply but still cant seem to find an example.

[skimask]

Thanks for the quick reply but still cant seem to find an example.

Check the little green book, enough examples in there to get you started.

[tico]

So since its to the manual should I use hserin or shiftin. I am wrapping my head around this.

I have also found this example from melabs
http://www.melabs.com/resources/samples/pbp/spimast.bas

Since I am new to SPI am I correct that the PIC is the master and the SD card is the slave.

I am just looking for a recomended starting point so I dont spin my wheels more that I already have.

[skimask]

So since its to the manual should I use hserin or shiftin. I am wrapping my head around this.
I am just looking for a recomended starting point so I dont spin my wheels more that I already have.

Simple things first. The DOSonChip datasheets says it'll handle UARTs, SPI (I2C/SMBus coming soon).
Stick with the simplest first...Serial ports...fast, easy to handle, built in string handling in PBP, well documented, easy for a beginner, fast enough with the right code, the right processor, etc. I believe, SPI is overkill in this situation.
So, go with serial. SerIn/SerOut, SerIn2/SerOut2, HSerIn/HSerOut, any one of those combinations will work just fine, no matter what PIC, no matter what speed (up to a point of course). Pretty much it depends on how well and how efficiently you can write your code.

[Pic_User]

Hi tico,

Thanks for the quick reply but still cant seem to find an example.

Paste this into your Google search engine.

spi site:http://www.picbasic.co.uk/forum/

or

spi pic16f876a site:http://www.picbasic.co.uk/forum/

hope that helps

-Adam-

[Archangel]

I am looking for code examples to use SPI on the 877a I have searched a few times but the search engine complains that SPI is too short.

My long term goal is to interface with one of the dos on chip IC for sd cards available from sparkfun.com .

I have a project working using serial comm to a PC what I would like is the option to datalog using SPI so that I dont interfere with my serial link to the PC.

Any help would be greatly appreciated.
Thanks in advance.

SPI is only 3 letters and the search engine wants 4 so add a wildcard to your search: SPI* and you will get everything that starts with spi - maybe useful, or not.