Jan 26, 2015

Agenda

Baja II Senior Design Meeting
Date: 1/26/15
Time: 12:30 pm – 1:30 pm
Location: Stinson Remick 207
Meeting Leader: Eric Jesse
Minutes: Maggie McGonigle
Attendees: Sam Flores, Eric Jesse, Maggie McGonigle, Anthony Ngyuen, Prof. Mike Schafer
 

1. Discuss Individual Assignments and Current Status
   1. Memory Storage
   2. LCD Touch Screen
   3. GPS
   4. Hall Effect Sensors & Temperature Sensors
2. Discuss any other purchases that still need to be made and order them if possible
   1. Temperature sensor
   2. Microcontroller discussion
3. Discuss and Assign Action Items
   1. Connecting to the board or reading the device
   2. Discuss possibility of code being written
   3. Reminder of deadlines (next: February 16^th)

 Minutes

Baja II Senior Design Meeting Minutes
Date: January 26, 2015
Time: 12:30-2:00pm
Location:  Stinson Remick 207
Meeting Leader: Eric Jesse
Minutes: Maggie McGonigle
Attendees: Sam Flores, Anthony Ngyuen, Prof. Mike Schafer

Memory storage

• Write and read cycle times
  • EEPROM byte by byte, Flash in chunks
• Sample times
  • GPS once/second
  • RPM fastest sampling time
  • Consider the difference between display sample times and record sample times
• Long sample time should mitigate concerns about write times
• Microchip compatible with SPI
• Need microcontroller USB capable
• Calculate the total memory needed?
• Schafer has a flash chip that we can use for testing
  • Need to order a new part for final design?
  • Quick calculations suggest 16 megabits should be OK

Touch Screen

• Software should be preloaded into the screen
• Downloaded the library
  • Needs to work in C not C++
• Function to put a gauge on the screen
• Don’t use the library from the screen manufacturer

GPS

• NMEA Sentences vs Binary…
  • Binary = less parsing
  • NMEA is in ASCII
  • Binary looks likes the better option
• Data through the UART to microprocessor and then to the data storage
• Look into feeding GPS location data to google maps
  • After the fact
  • Write some basic analysis functions?
• Display speed
• Time, Lap time?
  • Lap time calculated w/ operator pressed button on the LCD Screen

Hall Effect sensors

• Found one with higher operating range
• Responds to both magnetic polarity
• Good temperature range
• CVT Temp range = 0-120F
• How to mount the sensor?
• Voltage to Temp. conversions
• Separate counters for the engine and wheel RPM

Concerns: Wiring and stability of the set up. Board set up to facilitate connectors rather than solder

Microcontrollers:

• Postponed to Wednesday (?)– not critical to discuss until we get to board design.
• For now, utilize the kit board to test and understand subsystems

Action Items:

• Sam – Code for the different memories, prototype Flash memory
• Eric – figure out how to connect the LCD
• Anthony – Code for the RPM sensor, and order new sensors
• Maggie – get functional GPS binary mode…
  • Use UART to send the commands to set Binary
  • 3.3V part – don’t blow it up
  • Default to get all of the NMEA sentences
  • SPI pin and UART pins

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