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135 lines
6.1 KiB
Markdown
135 lines
6.1 KiB
Markdown
Shutter control
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===============
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Works with bi-stable shutter.
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You can find the device in `/dev/shutterX` (symlink to `/dev/ttyUSBX`).
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After powered on, the device will try to close shutter (during one second).
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The CCD (or manual) controlled input allows to open/close shutter by changing its level (depending on `ccdactive` parameter).
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If current configuration can't open or close the shutter immediately, it will be opened/closed as soon as possible, while the input holds its level.
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When the shutter is closed, the device will send over USB a message like
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```
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exptime=10000
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shutter=closed
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```
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with calculated value of opened time and current shutter state.
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If the error occured and shutter can't be closed, user will read `exp=cantclose`, shutter will come into error state. You should close the shutter by external command in that case.
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After the shutter completely opened, user can read a message `shutter=opened`.
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## Pinout
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**PB0** (pullup in) - hall (or reed switch) sensor input (active low) - opened shutter detector
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**PB11** (pullup in) - CCD or button input: open at low signal, close at high
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**PA3** (ADC in) - shutter voltage (approx 1/12 U)
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**PA5** (PP out) - TLE5205 IN2
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**PA6** (PP out) - TLE5205 IN1
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**PA7** (pullup in) - TLE5205 FB
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**PA10** (PP out) - USB pullup (active low)
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**PA11**, **PA12** - USB
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**PA13**, **PA14** - SWD
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## Commands
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### debugging options:
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* '0' - shutter OPE
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* '1' - shutter CLO
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* '2' - shutter OFF
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* '3' - shutter HIZ
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* 'W' - test watchdog
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### configuration:
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* '< n' - voltage on discharged capacitor (*100)
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* '> n' - voltage on fully charged capacitor (*100)
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* '# n' - duration of electrical pulse to open/close shutter (ms)
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* '$ n' - duration of mechanical work to completely open/close shutter (ms)
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* '* n' - shutter voltage multiplier
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* '/ n' - shutter voltage divider (V=Vadc*M/D)
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* 'c n' - open shutter when CCD ext level is n (0/1)
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* 'd' - dump current config
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* 'e' - erase flash storage
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* 'h n' - shutter is opened when hall level is n (0/1)
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* 's' - save configuration into flash
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### common control:
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* 'A' - get raw ADC values
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* 'C' - close shutter / abort exposition
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* 'E n' - expose for n milliseconds
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* 'O' - open shutter
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* 'R' - software reset
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* 'S' - get shutter state; also hall and ccd inputs state (1 - active)
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* 't' - get MCU temperature (/10degC)
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* 'T' - get Tms
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* 'v' - get Vdd (/100V)
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* 'V' - get shutter voltage (/100V)
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Any wrong long message will echo back. Any wrong short command will show help list.
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## Shutter control
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Commands '0' ... '3' should be used only for debugging purposes.
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To open/close shutter use only 'O', 'C' and 'E' commands.
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When opening or closing shutter you will first receive an answer: `OK` if command could be done or `ERR` if there's insufficient voltage on capacitor or shutter is absent.
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After opened the message `shutter=opened` will appear. After closing you will receive messages `exptime=xxx` (when `xxx` is approx. exp. time in milliseconds) and `shutter=closed`.
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Command 'E' could return `OK`, `ERR` or `ERRNUM`/`I32OVERFLOW` in wrong number format (number could be decimal, 0x.. - hexadecimal, b.. - binary or 0.. - octal).
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"Status" command in this case will return `shutter=exposing` and `expfor=xxx` - the given exposition time.
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When exposition starts you will receive message `OK` and `shutter=opened`. After its end you'll got `exptime=...`, `shutter=closed`.
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If shutter can't be closed, you will give a lots of `exp=cantclose` and different error messages until problem be solved. To stop this error messages give command 'O'.
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## Different commands
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* 'A' will show raw values for all ADC channels: 0. - capacitor voltage, 1 - MCU temperature, 2 - MCU Vdd. You will give messages like `adcX=val`.
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* 't' - `mcut=val`, where val = T*10 degrC.
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* 'T' - `tms=val`, val in ms.
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* 'v' - `vdd=val`, val in V*100
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* 'V' - `voltage=val`, val in V*100
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* 'S' - several answers:
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* `shutter=`: `closed`, `opened`, `error`, `process`, `wait` or `exposing` - shutter state
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* `expfor=...` (only when exposing by command Exxx) - show given exposition time
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* `exptime=...` (only when shutter is opened) - show time since opening
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* `regstate=`: `open`, `close`, `off` or `hiZ` - TLE5205 outputs state
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* `fbstate=`: `0` or `1` - TLE5205 FB out state (1 - error: insufficient voltage or shutter absent)
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* `hall=`: `0` or `1` - 1 for opened shutter, 0 for closed
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* `ccd=`: `0` or `1` - 1 for active (closed contacts) state of "CCD" input
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## Configuration
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All configuration stored in MCU flash memory, to dump current config just enter command 'd' and you will give an answer like
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```
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userconf_sz=16
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ccdactive=1
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hallactive=0
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minvoltage=400
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workvoltage=700
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shuttertime=20
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waitingtime=30
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shtrvmul=143
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shtrvdiv=25
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```
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* `userconf_sz` - "magick" number to determine first non-empty record in flash storage. The aligned size of one record in bytes.
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* `ccdactive` - is level of 'CCD' input to open shutter (1 to open on high and 0 to open on low signal), change this value with command `c`.
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* `hallactive` - the same for Hall sensor or reed switch mounted on shutter to indicate opened state, change with `h`.
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* `minvoltage` - voltage level on discharged capacitor (V*100 Volts), when shutter is in opened/closed state, the power will be off from coils reaching this level. Can be from 1V to 10V. Change with `<`.
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* `workvoltage` - minimal level (V*100 Volts) of charged capacitor to start process of opening/closing, you can open/close shutter only with higher voltage. Can be from 5V to 100V. Change with `>`.
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* `shuttertime` - maximal time (milliseconds) of holding active voltage on shutter's coils. Can be from 5ms to 1s. Change with `#`.
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* `waitingtime` - waiting time for the shutter to finish its job. The expose time can't be less than this value. Can be from 5ms to 1s. Change with `$`.
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* `shtrvmul` - multiplier to calculate capacitor voltage from voltage on ADC input of MCU. Vcap = V*shtrvmul/shtrvdiv. Can be from 1 to 65535. Change with `*`.
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* `shtrvdiv` - divider of capacitor voltage calculation. Can be from 1 to 65535. Change with `/`.
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All changes of configuration processed in RAM and acts immediately after changed. If you want to store changes, use command `s`. |