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69 lines
1.7 KiB
Markdown
69 lines
1.7 KiB
Markdown
# Canon lens management.
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Management of some Canon Lens. Checked: EF85, EF200 and EF400.
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[Documentation about first "crack" methods](https://github.com/eddyem/canon-lens).
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## Pinout
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* PA4 - lens detect (low active);
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* PA5,6,7 - SPI SCK, MISO (should have external pullup), MOSI;
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* PA8 - enable lens power (high active);
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* PA9 - !OC - overcurrent detected (low active);
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* PA10 - USB DP pullup (low active);
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* PA11,12 - USB DM, DP;
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* PA13,14 - SWD IO, CLK;
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* PB8,9 - CAN Rx,Tx;
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* PC13 - USB/CAN (solder jumper to turn on CAN instead of USB, zero - CAN).
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## USB commands
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Protocol have a string form, each string ends with '\n'. You should wait an answer for previous command before sending next, or have risk to miss all the rest commands in one packet.
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### Base commands
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> **0** move to smallest foc value (e.g. 2.5m)
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> **1** move to largest foc value (e.g. infinity)
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> **a** move focus to given ABSOLUTE position or get current value (without number)
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> **d** open/close diaphragm by 1 step (+/-), open/close fully (o/c) (no way to know it current status)
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> **f** move focus to given RELATIVE position
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> **h** turn on hand focus management
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> **i** get lens information
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> **l** get lens model
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> **r** get regulators' state
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### Debugging or configuration commands
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> **A** set (!0) or reset (0) autoinit
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> **C** set CAN speed (25-3000 kbaud)
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> **D** set CAN ID (11 bit)
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> **E** erase full flash storage
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> **F** change SPI flags (F f val), f== l-LSBFIRST, b-BR [18MHz/2^(b+1)], p-CPOL, h-CPHA
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> **G** get SPI status
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> **I** reinit SPI
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> **L** 'flood' message (same as `S` but every 250ms until next command)
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> **P** dump current config
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> **R** software reset
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> **S** send data over SPI
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> **T** show Tms value
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> **X** save current config to flash
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