Iv'e heard it's possible to change the pins drive strength.
Iv'e had several questions regarding this topic:
1. how exactly is the drive strength changed?
2. does the "pin mode" number sent to PinTypeI2C have any effect/connection to this (I aw different values for the SDA pin in different code examples I found)?
3. are there any negative implications to increasing the drive strength? any guidelines I should pay attention to?
Thanks in advance!
Tal,
Please see below:
1. how exactly is the drive strength changed?
The drive strength changes by using this function
PinConfigSet(ulPin,PIN_STRENGTH_2MA|PIN_STRENGTH_4MA,PIN_TYPE_STD);
This function is called inside PinTypeI2C().
2. does the "pin mode" number sent to PinTypeI2C have any effect/connection to this (I aw different values for the SDA pin in different code examples I found)?
The Pin mode corrosponds to what peripheral you would like that pin to be muxed to. There is a table inside the CC3200 Datasheet that shows what the number should be for I2C.
http://www.ti.com/lit/ds/symlink/cc3200.pdf
3. are there any negative implications to increasing the drive strength? any guidelines I should pay attention to?
The drive strength really just depends on what you are trying to control. the pull up or pull down usually can be a weak pull for Digital signals, and strong if your driving a LED or such device.
Let me know if that helps!
VR
Tal,
No, it was not left out, you have multiple drive strengths that you can configure. For more info, please refer to page 498 of http://www.ti.com/lit/ug/swru367c/swru367c.pdf
Regards,
VR
