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[Paparazzi-devel] Reply to:"RE: Test flight with ArduIMU with Steve's fi

From: Chris
Subject: [Paparazzi-devel] Reply to:"RE: Test flight with ArduIMU with Steve's firmware." (mark.griffin)
Date: Thu, 17 Feb 2011 14:09:02 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20101208 Thunderbird/3.1.7

Yes this flight was with the i2c queue buffer increased to 16 although as Steve pointed out to me this might not have an effect at all, and the bus lowered to ~19Khz since i calculated that ther
is enough time to transfer the required data at 50Hz.
I did alter some files like the "i2c_arch.c" "ins_arduimu.c" and "ins_arduimu.h"
Here is the part from my airframe file:
<define name="I2C_TRANSACTION_QUEUE_LEN" value="16"/> <!-- default is 8 -->
<define name="I2C0_SCLL" value="400"/> <!-- default clock speed 37.5KHz with our 15MHz PCLK I2C0_CLOCK=PCLK/(I2C0_SCLL+I2C0_SCLH) --> <define name="I2C0_SCLH" value="400"/> <!-- Default values are 200 and must be the same for both SCLL and SCLH -->

I will send you the modified i2c files, Steve has them also, so someone who knows the lpc's I2C architecture well, can approve or dismiss those changes.

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