Minutes20110406¶
Gumstix and ROS Status¶
- ROS Open Source code for interfacing with AVR
- Edit it and get it on repository
- No updates for Gumstix. Attempt to finish it by April 15.
- Get Diamondback on Gumstix
- Want to start writing drivers.
- Use dev out with 40 pins to test stuff
Board/AVR Status¶
- Send Kwoo a list of spares and a populated board and tshirts.
- Want to test out what is wrong with the power supplies and make sure that all the ICs are receiving power.
- Test out other stuff using firmware. Need drivers.
- Get thread with issues with board
- Contains: issue with the 3.3V rail not coming up to the right voltage
- small list of bugs already found
- Board needs to be rerouted/respun
Issues with Board¶
- Board does not power up:
- Contains: issue with the 3.3V rail not coming up to the right voltage
- Fixed by mid-May
- If this gets fixed we can address other issues
- Want to get a new Gyroscope that is cheaper and better
- Feasibility of moving things around because it uses different pins
- Would require rerouting
Mechanical¶
- Pretty much done
- We can add $20 wireless-N card for wireless if we wanted to
Repository¶
- We're using git
- the board and schematic are located in the Scout HW repository
- go on Scout EE and then HardWare
Bandwidth and Ports¶
- Do math to figure out interrupt overhead
- pending rough packet structure design
- Get UART ports and SPI ports to be the same so we dont have to worry about changing it.
- Find out Colony 3 hardware bandwidth
- Contact Rich Hong about this
- 250 kbit per second for wireless
- 1/2 mb per second on avr
- We only want to be using 50% of our bandwidth
Moneys¶
- Need money to build more Scouts
- People should talk to RI contacts for money
- $5000 - $10,000
- Ben and Priya will go to Howie Choset and George Cantor for moneys
- Other companies to ask money:
- DigiKey
- Sparkfun
- Places we get parts from
Packet Protocal¶
- Prashant will research how best to send packets over network
- Discuss a rough packet structure next time.
- Lead into figuring out interrupt overhead
Sensor Testing & Drivers¶
- Test station for BOM
- Test if a BOM reading from two different frequencies has data collision and other issues
- Figure out how fast sonars can poll with fastest speed of scanning
- Driver that controls both sonar and stepper and ties then together
- Sonar has an automatic calibration to hone where front of robot is.
- What drivers would look like, where to read data from etc, functions, etc.
Things To Do:¶
- Find the ROS Open Source code for interfacing with AVR and start looking at it.
- Get ROS Diamondback on Gumstix by April 15/next meeting.
- Send Kwoo a list of spares and a populated board and tshirts.
- Fix issue with the board powering up by mid-May:
- Contains: issue with the 3.3V rail not coming up to the right voltage
- Figure out the feasibility of getting a new Gyroscope that is cheaper and better
- Board may require rerouting
- Perhaps add $20 wireless-N card
- Find out Colony 3 hardware bandwidth
- Contact Rich Hong about this
- Ben and Priya will go to Howie Choset and George Cantor for moneys
- Contact the following companies for funding:
- Prashant will research how best to send packets over network and get ideas for a rough packet structure.
- Figure out how fast sonars can poll with fastest speed of scanning
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