On Sat, Jun 4, 2016 at 7:30 AM, David Carkeek <dcarkeek@gmail.com> wrote:
We talked about this but I forgot the conclusion. Is the next board going to be a TS07?– Decawave module– nRF52 module from RayTac– Microsemi ZL70550– Maybe an IMU footprint. Could be Invensense, ST or Bosch– Maybe a barometer footprint, probably Bosch– Expansion port– No memory card socket– JTAG connector– New power supplyI made a TS07 design directory in Google Drive but it is under the TS06 shared directory. That doesn’t make much sense unless it’s going to be called TS06.4. Should there be a new TS07 shared directory?
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Yup. “TS07” (codenamed “Pining” <for the fjords?>) seems right, This will be TS07.1 aka “Pining.1”
You already had access to the directory above Touchstone, but I created the new directory TS07, and moved your new stuff into it.
You might want to bookmark the root Touchstone directory so you can get to all the antique stuff?
I think your list is good. Some thoughts…
- We need to think about the IMU choice. I hear the Bosch IMU is functionally rather good, but perhaps it sucks power. What do you think?
- Barom and IMU are a single decision. Both or neither.
- PSU – Provisions for this BOVLB to measure power consumption with onboard/offboard instruments
- JTAG – great if easy to plug in and remove.
- Arduino compatible expansion port – makes experiments with off-the-shelf boards an option
- If there sufficient pins to have DW on SPI0, and IMU, etc on SPI1, and still pins for I2C… great.
- Spare pins get: LEDs, buttons (that are easy to press!). Reset button – minimal value
- UART – I am living without (using SEGGER), but if, and only if, we are using USB to charge, may as well hook it up if pins avail.
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Using the SEGGER for trace output is a bit inconvenient because it keeps hanging up, and it uses a lot of buffer space. So I’m in greater favor of putting a FTDI serial to USB chip on – at least for the next rev.