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  1. 5 likes
    This project was put on hold over the holidays. It's always a busy time, plus the club doesn't hold meets over summer. But I have just completed another 10 units. More of the same, but thought you guys might enjoy some more photos. I couldn't get the same batteries as the last batch, which were 650mAh, these have much smaller 220mAh. But this still provides about 4 hours of run time. The uBlox GPS modules are a huge improvement. Even without the SAW filter in the RF path and the sub-optimal PCB size compared to the antenna. These find more GPS satellites faster than the G.top modules, plus they also use glonass which doubles the visible satellites.
  2. 4 likes
    I have done both of these tasks for more than one client. The 1-Wire protocol speed ends up being about 15kHz, which is slow but reliable. It's really cool to see on an scope though. I developed the I2C slave code using the sample TI code as the starting point. Here are the research materials that I referred to while writing my I2C code: http://www.nxp.com/documents/application_note/AN10216.pdf http://www.nxp.com/documents/user_manual/UM10204.pdf http://i2c.info/i2c-bus-specification http://www.ti.com/lit/an/slva704/slva704.pdf My slave code just follows the logic of the transaction.
  3. 3 likes
    Came across this while browsing. MSP430 Analog Gauge Clock