Created
June 18, 2014 16:43
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#### Wed Jun 18 11:00:13 BST 2014 | |
- Setting up bench | |
#### Wed Jun 18 11:25:17 BST 2014 | |
- Testing servo on both models (connected to VBAT) | |
- No problems encountered | |
- Testing servo + stepper | |
- RPIO module has problems running both at once (not a HW issue) | |
- But, using the lower-level API, ran both at once without issues | |
- Testing servo + stepper on battery | |
- No issues | |
#### Wed Jun 18 11:53:55 BST 2014 | |
- Looking at making design changes | |
#### Wed Jun 18 12:29:20 BST 2014 | |
- Looking at firmware DC-motor issue | |
- Programming firmware with constant speed | |
- encountered programming issues: resolved through removing motor connections and re-plugging programmer | |
- no other issues: points to a comms problem | |
- more programming issues: resolved through re-plugging programmer | |
- encountered issue of not being able to power pi: everything turns off, short circuit? | |
- attempted to power pi directly: no issues | |
- re-connected pi and pibot-board: resets repeatedly on start | |
- model-b pi has developed issue starting on either pibot-board, still starts fine of 5V direct | |
- model-a does not have this issue | |
#### Wed Jun 18 14:04:03 BST 2014 | |
- model-b power-up issue resolved by changing input from 5V: DC-DC cannot operate as 5V in to 5V out, needs to be different | |
- looking at firmware motor issue again | |
- attaching UART cable and printing SPI to UART | |
- servo moves when attaching serial and USB debounce fails | |
- adding pull-up (4k7) on servo data line (up to 3v): servo jumps around less, still works | |
- trying 10k pull-up: OK | |
- adding pull-up to design | |
- SPI is constantly reading 0 for all values unless written to | |
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