shane.2471958's articles:

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Poll : do you do peer reviews / code reviews / design reviews 7 32 (4/12/2011 1:04:33 PM) comp.arch.embedded I recently read on Phil Koopman's blog http://betterembsw.blogspot.com/ that peer reviews should be finding approx half of errors and testing find the other half. Where I work we do very few peer reviews of so... Shane

ccitt crc error detection failure rate test program 15 27 (4/10/2011 1:04:44 PM) comp.arch.embedded Out of curiosity, I've lashed up a program (see below) to try and test the detection failure rate for the ccitt 16 bit crc. It repeatedly generates a buffer of 32 pseudo-random bytes, calculates the crc, then... Shane

error detection rate with crc-16 CCITT 46 364 (3/27/2011 8:58:32 AM) comp.arch.embedded Hi We're using the 68302 micro with DDCMP serial protocol over two wire RS485. According to the user manual, this uses CRC16-CCITT - X**16 X**12 X**5 + 1. Does anyone have any idea what the chance of... Shane

RS485 chip LTC491; optocoupler MOC5007 14 38 (2/17/2011 10:46:59 AM) comp.arch.embedded Hi I'm a software engineer wondering about some hardware. We have a circuit board with RS485 circuitry and Motorola 68302 processor using an LTC491 RS485 chip and MOC5007 optocoupler for electrical isolation.... Shane

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error detection rate with crc-16 CCITT 46 364 (3/27/2011 8:58:32 AM) comp.arch.embedded Hi We're using the 68302 micro with DDCMP serial protocol over two wire RS485. According to the user manual, this uses CRC16-CCITT - X**16 X**12 X**5 + 1. Does anyone have any idea what the chance of... shane.2471958 (30)

wxDesigner 31 28 (3/31/2011 7:31:28 PM) comp.arch.embedded Hi, I'm looking at using wxWidgets (or whatever the nom-du-jour is) to create some screens for a *kiosk* (i.e., not a desktop) interface. A colleague pointed me to wxDesigner as a tool for quickly building dia... not.going.to.be (525)

ccitt crc error detection failure rate test program 15 27 (4/10/2011 1:04:44 PM) comp.arch.embedded Out of curiosity, I've lashed up a program (see below) to try and test the detection failure rate for the ccitt 16 bit crc. It repeatedly generates a buffer of 32 pseudo-random bytes, calculates the crc, then... shane.2471958 (30)