stm32samples/F1:F103/shutter

Shutter control

Works with bi-stable shutter. You can find the device in /dev/shutterX (symlink to /dev/ttyUSBX).

Pinout

PB0 (pullup in) - hall (or reed switch) sensor input (active low) - opened shutter detector

PB11 (pullup in) - CCD or button input: open at low signal, close at high

PA3 (ADC in) - shutter voltage (approx 1/12 U)

PA5 (PP out) - TLE5205 IN2

PA6 (PP out) - TLE5205 IN1

PA7 (pullup in) - TLE5205 FB

PA10 (PP out) - USB pullup (active low)

PA11, PA12 - USB

PA13, PA14 - SWD

Commands

debugging options:

• '0' - shutter OPE
• '1' - shutter CLO
• '2' - shutter OFF
• '3' - shutter HIZ
• 'W' - test watchdog

configuration:

• '< n' - voltage on discharged capacitor (*100)
• '> n' - voltage on fully charged capacitor (*100)
• '# n' - duration of electrical pulse to open/close shutter (ms)
• '$ n' - duration of mechanical work to completely open/close shutter (ms)
• '* n' - shutter voltage multiplier
• '/ n' - shutter voltage divider (V=Vadc*M/D)
• 'c n' - open shutter when CCD ext level is n (0/1)
• 'd' - dump current config
• 'e' - erase flash storage
• 'h n' - shutter is opened when hall level is n (0/1)
• 's' - save configuration into flash

common control:

• 'A' - get raw ADC values
• 'C' - close shutter / abort exposition
• 'E n' - expose for n milliseconds
• 'O' - open shutter
• 'R' - software reset
• 'S' - get shutter state; also hall and ccd inputs state (1 - active)
• 't' - get MCU temperature (/10degC)
• 'T' - get Tms
• 'v' - get Vdd (/100V)
• 'V' - get shutter voltage (/100V)

If you will enter wrong long message, will receive its echo back. Any wrong short command will show help list.

Shutter control

Commands '0', '1' and '2' should be used only for debugging purposes. To open/close shutter use only 'O', 'C' and 'E' commands.

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. 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.

Command 'E' could return OK, ERR or ERRNUM/I32OVERFLOW in wrong number format (number could be decimal, 0x.. - hexadecimal, b.. - binary or 0.. - octal).

When exposition starts you will receive message OK and shutter=opened. After its end you'll got exptime=..., shutter=closed. 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'.

Different commands

• '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.

• 't' - mcut=val, where val = T*10 degrC.

• 'T' - tms=val, val in ms.

• 'v' - vdd=val, val in V*100

• 'V' - "voltage=val", val in V*100

• 'S' - several answers:

  • shutter=: closed, opened, error, process, wait or exposing - shutter state
  • expfor=... (only when exposing by command Exxx) - show given exposition time
  • exptime=... (only when shutter is opened) - show time since opening
  • regstate=: open, close, off or hiZ - TLE5205 outputs state
  • fbstate=: 0 or 1 - TLE5205 FB out state (1 - error: insufficient voltage or shutter absent)
  • hall=: 0 or 1 - 1 for opened shutter, 0 for closed
  • ccd=: 0 or 1 - 1 for active (closed contacts) state of "CCD" input

Configuration

All configuration stored in MCU flash memory, to dump current config just enter command 'd' and you will give an answer like

userconf_sz=16
ccdactive=1
hallactive=0
minvoltage=400
workvoltage=700
shuttertime=20
waitingtime=30
shtrvmul=143
shtrdiv=25

• ``
• ccdactive - is level of 'CCD' input to open shutter (1 to open on high and 0 to open on low signal)
• hallactive