keyboard/onekey/VUSB.md

   1 TMK with Xtal-less V-USB
   2 ========================
   3
   4 TMK onekey works on ATtiny85.
   5
   6     $ make -f Makefile.vusb
   7
   8     ...
   9
  10     Size after:
  11        text    data     bss     dec     hex filename
  12        5518      14     254    5786    169a onekey_vusb.elf
  13
  14     -------- end --------
  15
  16
  17 https://i.imgur.com/sNa302J.jpg
  18
  19
  20 Program with AVRISPmkII
  21 -----------------------
  22 D- and D+ lines are need to be disconnected when programed.
  23
  24     $ avrdude -p attiny85 -c avrispmkii -U flash:w:onekey_vusb.hex
  25
  26
  27 Xtal-less internal RC
  28 ---------------------
  29 http://codeandlife.com/2012/02/22/v-usb-with-attiny45-attiny85-without-a-crystal/
  30
  31 Configure fuses for PLL, internal RC and BOD(Brown out detection).
  32
  33     $ avrdude -c avrispmkii -p attiny85 -U lfuse:w:0xe1:m -U hfuse:w:0xdd:m
  34
  35 Set 16.5MHz to F_CPU in Makefile
  36
  37     F_CPU = 16500000
  38
  39 Add settings for calibration in usbconfig.h
  40
  41     diff --git a/keyboard/onekey/usbconfig.h b/keyboard/onekey/usbconfig.h
  42     index e9b4f98..01e5aa6 100644
  43     --- a/keyboard/onekey/usbconfig.h
  44     +++ b/keyboard/onekey/usbconfig.h
  45     @@ -161,7 +161,11 @@ section at the end of this file).
  46       * proceed, do a return after doing your things. One possible application
  47       * (besides debugging) is to flash a status LED on each packet.
  48       */
  49     -/* #define USB_RESET_HOOK(resetStarts)     if(!resetStarts){hadUsbReset();} */
  50     +#define USB_RESET_HOOK(resetStarts)     if(!resetStarts){hadUsbReset();}
  51     +/* http://codeandlife.com/2012/02/22/v-usb-with-attiny45-attiny85-without-a-crystal/ */
  52     +#ifndef __ASSEMBLER__
  53     +extern void hadUsbReset(void); // define the function for usbdrv.c
  54     +#endif
  55      /* This macro is a hook if you need to know when an USB RESET occurs. It has
  56       * one parameter which distinguishes between the start of RESET state and its
  57       * end.
  58     @@ -202,7 +206,7 @@ section at the end of this file).
  59       * usbFunctionWrite(). Use the global usbCurrentDataToken and a static variable
  60       * for each control- and out-endpoint to check for duplicate packets.
  61       */
  62     -#define USB_CFG_HAVE_MEASURE_FRAME_LENGTH   0
  63     +#define USB_CFG_HAVE_MEASURE_FRAME_LENGTH   1
  64
  65
  66 Another calibration code
  67 ========================
  68 https://github.com/obdev/v-usb/tree/master/libs-device