Javascript Disabled Detected

You currently have javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality.

The Netduino forums have been replaced by new forums at community.wildernesslabs.co. This site has been preserved for archival purposes only and the ability to make new accounts or posts has been turned off.

SoftSerial?

Started by Johnny Five , Sep 22 2010 08:53 PM

Please log in to reply

4 replies to this topic

#1 Johnny Five

Member

Members
29 posts

Posted 22 September 2010 - 08:53 PM

I don't know enough yet to write this on my own, but has this been looked at for the netduino? I need more UART than are on the board, and almost all the other ports are used as well for my project. Anyone working on a softserial implementation?

Back to top

#2 Chris Walker

Secret Labs Staff

Moderators
7767 posts

LocationNew York, NY

Posted 22 September 2010 - 08:54 PM

Hi Johnny Five, How many UARTs do you need? Have you thought about using a SPI-to-Serial converter chip? Chris

Back to top

#3 Johnny Five

Member

Members
29 posts

Posted 22 September 2010 - 08:58 PM

Hello Chris, I (think) I need 3 UART altogether. Someone mentioned that I could use an SPI-2-UART, but can SPI handle multiple devices? I am using the SDCard shield, and afaik the pins 11-13 are already being used by it.

Back to top

#4 Chris Walker

Secret Labs Staff

Moderators
7767 posts

LocationNew York, NY

Posted 22 September 2010 - 09:00 PM

Hello Chris,

I (think) I need 3 UART altogether.

Someone mentioned that I could use an SPI-2-UART, but can SPI handle multiple devices? I am using the SDCard shield, and afaik the pins 11-13 are already being used by it.

Yes, absolutely. Pins 11-13 are shared amongst all your SPI devices. You need to use one "chip select" pin per device.

There might also be I2C-to-UART devices available--although those might be a bit speed limited. Hundreds of devices can share the 2 I2C pins (AD4/AD5).

Chris