View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000080 | LCD Display | USB/MicroSD | public | 2008-08-30 16:21 | 2010-04-10 09:07 |
| Reporter | Peter | Assigned To | |||
| Priority | low | Severity | feature | Reproducibility | N/A |
| Status | new | Resolution | open | ||
| Product Version | 2.00 | ||||
| Summary | 0000080: Logging to microSD card | ||||
| Description | Should be able to log data to microsd card...both sensor data, and trip meter data also. may face issues of not knowing when a user is going to turn off display though, which may complicate things (just like it does for saving trip meter statistics across sessions) | ||||
| Tags | No tags attached. | ||||
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will create a seperate ticket for just identifying a sdcard etc for next firmware, so users can test out their cards (and for the early displays, their missing resistor fix for microsd card usage) |
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You may need to introduce some kind of wear-levelling algorithm to any task that frequently writes to the SD in order to reduce likelihood of premature card failure. |
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This is applicable to 0000074 as well (it seems that you've got it covered via using eeprom/nvram for trip data though) |
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i think its the responsibility of the sd card's controller to implement wear levelling - most datasheets do mention that that is a job it does. but i do need wear levelling for the bits of onboard eeprom that will be written to a lot storing current trip data for the other save trip data feature |
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Perhaps only saving the SD-data when the neutral switch is triggered could be an option? |
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the wear levelling is all sorted for trip meter (saves every 10s, may increase this to 15s if i need to save more stuff like SD card position) so nothing really tricky there, although i may write info to start of card routinely showing where its up to, etc rather than using eeprom. either way it shouldnt be too much of a problem, the actual writing to sd card itself and compability with all cards etc is whats left. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2008-08-30 16:21 | Peter | New Issue | |
| 2008-08-30 16:21 | Peter | Status | new => assigned |
| 2008-08-30 16:21 | Peter | Assigned To | => Peter |
| 2008-09-06 22:21 | Peter | Note Added: 0000055 | |
| 2008-09-06 22:21 | Peter | Priority | normal => low |
| 2009-06-26 17:46 | Peter | Status | assigned => new |
| 2009-06-28 18:37 | BensDR30 | Note Added: 0000080 | |
| 2009-06-28 18:40 | BensDR30 | Note Added: 0000081 | |
| 2009-06-28 18:44 | Peter | Note Added: 0000083 | |
| 2010-01-26 23:10 | Peter | Status | new => assigned |
| 2010-01-26 23:15 | BensDR30 | Note Added: 0000094 | |
| 2010-01-26 23:44 | Peter | Note Added: 0000095 | |
| 2010-04-10 09:07 | Peter | Assigned To | Peter => |
| 2010-04-10 09:07 | Peter | Status | assigned => new |
