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| SPI maximum speed https://www.8devices.com/community/viewtopic.php?f=13&t=827 |
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| Author: | lukasz [ 14 Oct 2014, 18:59 ] |
| Post subject: | SPI maximum speed |
Hi, I had finally managed to configure stable SPI connection between Carambola 2 and ATXmega. What troubles me now is the maximum speed I can set on spidev device to maintain stable transmission. By trial and error I had found that setting device speed above 92kHZ makes connection unreliable. On the other hand, in range between 50kHz and 92kHz error rate is about 1% (I am sending 256 byte blocks, with CRC16 checking). Now it takes about 3.6s to send hundred of 256 byte blocks, which is about 56kbps. I was expecting better values. Does anyone have any suggestions how to make it faster ? |
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