Browsing All Posts filed under »Firmware«

Integration Jam Session

September 21, 2014

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Njay got the burned bridge rebuilt, tested, and “burned-in” for an hour at 10Amps, so we got together again to finish integrating the system. This time with the 500 kbps I²C bus between the RasPi and the Power Bridges, so that the link is loud and clear. Njay was afraid that such high speeds would […]

Tuning out the glitches

September 20, 2014

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WE ARE AT THE FAIRE RIGHT NOW! 🙂 JOIN US! Meanwhile we’ll keep posting the story behind the project… Me and NJay finally got together for a hacking jam session to find out what the heck is going wrong with the I²C comms bus between the RasPi and the Power Bridges. This is where his […]

Vroom vroom

September 19, 2014

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ATTENTION: THE Lisbon Mini Maker Faire 2014 OPENS TO THE PUBLIC TOMORROW, SATURDAY. GET YOURSELF REGISTERED ONLINE AS A VISITOR SO YOU DON’T HAVE TO WAIT IN LINE AT THE VENUE. IT’S FREE OF CHARGE, BUT YOU HAVE TO REGISTER FIRST. And now, back to our soap opera. 🙂 The time has come to finally […]

Power bridge status point & To-do list

September 14, 2014

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Njay: Status point, so that we both know where things stand. Both bridges have only 1 N-MOSFET connected, via a 100Ohm resistor. This is the configuration that tested the longest time, so I’m sticking with it. The gate resistor on the disconnected FET is removed (there is a pull-down that keeps the FET off). However […]

Power bridges to report temperatures and current

September 11, 2014

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Njay: Hi. Right now this is what I’ve got for the I²C registers… eI2cReg_Command         = 0,    // RW  command    // Status: b0~b3: heartbeat, b4:over-current eI2cReg_Status          = 1,    //  R  status    // Speed: speed/direction:  b7: direction; b0~6: Speed eI2cReg_Speed           = 2,    // RW  speed    // raw diode reading eI2cReg_HBridgeTemp     = 3,    //  R  […]

Time is running out

August 31, 2014

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Njay: Hi dude. I’ve got some bad news about our little project. I’ve gotten the bridges to work with current limitation, but they don’t read out the actual current for you, and they warm up too much for my taste. I’m going to give them another try, but then I have to give up. Like […]

More I2C register talk

August 29, 2014

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Vnevoa: Man, I hate hidden stuff! You’re cooking up an addressing scheme inside another addressing scheme. I don’t like that. Of course I’m doing all the read/write operations by the book, with addressing. That’s one lesson I learned the hard way at Siemens. 😉 I like the serial EEPROM addressing scheme and I’d like to […]