Invert SSEL function of SPI peripheral

[lpcware]

Content originally posted in LPCWare by emielzij on Tue Nov 25 02:22:29 MST 2014
Hi,

I try to send data to a device that can communicate using the SPI bus.
But the SYNC pin on the device is active low. I configured the spi peripheral on the lpc11c24 and did some measurements.
The SSEL line becomes high and goes low just before the microcontroller sends the data. But for a correct operations this needs to be inverted.

What is a convenient way to invert the SSEL spi function? I couldn't find a configuration option.

Or should I just pull a pin manually each time?

[lpcware]

Content originally posted in LPCWare by R2D2 on Tue Nov 25 03:16:57 MST 2014

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Quote: emielzij
What is a convenient way to invert the SSEL spi function?

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Hardware  :)

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Quote: emielzij
I couldn't find a configuration option.

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There's no option to switch SSEL active high. If you don't want to add an inverter, just use SSEL pin as GPIO and set it manually.