CCS C Software and Maintenance Offers
FAQFAQ   FAQForum Help   FAQOfficial CCS Support   SearchSearch  RegisterRegister 

ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to CCS Technical Support
Driver L6470
Goto page Previous  1, 2
 
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion
View previous topic :: View next topic  
Author Message
Ttelmah



Joined: 11 Mar 2010
Posts: 19831

View user's profile Send private message

PostPosted: Thu Nov 28, 2013 8:24 am     Reply with quote
This is a distinction between 'CS' (chip select), which would normally be expected to stay low for an entire data transaction, and is used to say what device is to be talked to, and 'SS' (slave select), which drops on a 'per byte' basis, to synchronise the SPI bytes.
It's behaving like the chip is using the line as SS, yet the data sheet shows it used as CS.....
The existing CCS driver, can drive 'SS' directly for you. Just add:

ENABLE=PIN_D4

To your SPI setup, and get rid of all references to the pin in the code.

Best Wishes
MotronixGS



Joined: 13 Jul 2011
Posts: 19

View user's profile Send private message

PostPosted: Thu Nov 28, 2013 8:29 am     Reply with quote
Sure!! We say the same...

jeremiah wrote:
MotronixGS wrote:
page 38 datasheet shows a timings diagram, CS is low while the transmission is active.


This is typical for SPI. CS is low for the entire transaction for most devices out there.
MotronixGS



Joined: 13 Jul 2011
Posts: 19

View user's profile Send private message

PostPosted: Thu Nov 28, 2013 8:30 am     Reply with quote
Thank you so much for your clarification!!


Ttelmah wrote:
This is a distinction between 'CS' (chip select), which would normally be expected to stay low for an entire data transaction, and is used to say what device is to be talked to, and 'SS' (slave select), which drops on a 'per byte' basis, to synchronise the SPI bytes.
It's behaving like the chip is using the line as SS, yet the data sheet shows it used as CS.....
The existing CCS driver, can drive 'SS' directly for you. Just add:

ENABLE=PIN_D4

To your SPI setup, and get rid of all references to the pin in the code.

Best Wishes
Display posts from previous:   
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion All times are GMT - 6 Hours
Goto page Previous  1, 2
Page 2 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group