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Xgate semaphore MC9S12XDP512

Question asked by claire delange on Apr 30, 2013



I use bus CAN for receive data and with this I generate a signal (with ECT)

For this I use interruption but I want 250ns for my signal period and I have 32µs (with PLL clock - 16MHz).


I would like to reduice this period and for do this I want to use semaphore to replace interuption.

But I don't know How do this.


Actualy, I stock receive_data in circualr buffer after to read data and generate signal by interruption. but It's too long.


In the documentation I read that for use semaphore I must use XGSEM, SSEM and CSEM. But I don't find how to use this register.


Thank you in advance,

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