SW SPI

Based on DMP's Vortex processor / SoC this board is a full computer capable of running a standard Windows and Linux installation on the backpack of your robot.
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SW SPI

Post by SoBot » Mon Dec 13, 2010 8:32 pm

Post by SoBot
Mon Dec 13, 2010 8:32 pm

I am using SPI communication and I need to use full duplex. So I use SW SPI, but it is to slow. Is there a way to speed up the SW SPI higher than 160kbps?
I am using SPI communication and I need to use full duplex. So I use SW SPI, but it is to slow. Is there a way to speed up the SW SPI higher than 160kbps?
SoBot offline
Robot Builder
Robot Builder
Posts: 17
Joined: Wed Mar 31, 2010 3:10 pm

Re: SW SPI

Post by roboard » Wed Dec 15, 2010 6:30 am

Post by roboard
Wed Dec 15, 2010 6:30 am

SoBot wrote:I am using SPI communication and I need to use full duplex. So I use SW SPI, but it is to slow. Is there a way to speed up the SW SPI higher than 160kbps?


Hi,

the S/W-simulated SPI is implemented by RB-100's GPIO functions and therefore its max speed is limited by the speed of the GPIO. We can boost the speed at most to 350K~400K bps by reducing the I/O-access overhead, but this may still not meet your need.

If you have a RB-110, you can use RB-110's Serial Port 6 to get a full-duplex SPI up to 12Mbps.

:)
SoBot wrote:I am using SPI communication and I need to use full duplex. So I use SW SPI, but it is to slow. Is there a way to speed up the SW SPI higher than 160kbps?


Hi,

the S/W-simulated SPI is implemented by RB-100's GPIO functions and therefore its max speed is limited by the speed of the GPIO. We can boost the speed at most to 350K~400K bps by reducing the I/O-access overhead, but this may still not meet your need.

If you have a RB-110, you can use RB-110's Serial Port 6 to get a full-duplex SPI up to 12Mbps.

:)
roboard offline
Savvy Roboteer
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Posts: 302
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