Log

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Connecting Opendous-JTAG and LPCXpresso17xx board

Posted on 10.10.2011 18:00 by krzysiek within jtag, lpc-link, lpc1769, lpcxpresso, opendous

Here's working connection between Opendous-JTAG and LPCXpresso1769 (and others) board:

OpendousPin	Function  LPCXpresso
0               TDI       10
1               TMS        4
2               TRST      ??
3               SRST      ??
4               TCK        6
5               TDO        8

LUFA powered mouse with scroll support

Posted on 23.07.2011 14:06 by krzysiek within avr, c, hid, lufa, mouse, mouse wheel, usb

I've needed some time ago to build LUFA powered mouse with scroll support.

In LUFA's examples and code I didn't find code to build such device's report descriptor, so here's mine:


/// Mouse Report Descriptor structure including Scroll
typedef struct
{
  uint8_t Button;  /**< Button mask for currently pressed buttons in the mouse. */
  int8_t  X;       /**< Current delta X movement of the mouse. */
  int8_t  Y;       /**< Current delta Y movement on the mouse. */
  int8_t  Scroll;  /**< Scroll report. */
} ATTR_PACKED USB_MouseReportWS_Data_t;


/// MouseWithScroll report descriptor
#define HID_DESCRIPTOR_MOUSE_WS(MinAxisVal, MaxAxisVal, MinPhysicalVal, MaxPhysicalVal, Buttons, AbsoluteCoords) \
  HID_RI_USAGE_PAGE(8, 0x01),                     \
  HID_RI_USAGE(8, 0x02),                          \
  HID_RI_COLLECTION(8, 0x01),                     \
    HID_RI_USAGE(8, 0x01),                      \
    HID_RI_COLLECTION(8, 0x00),                 \
      HID_RI_USAGE_PAGE(8, 0x09),             \
      HID_RI_USAGE_MINIMUM(8, 0x01),          \
      HID_RI_USAGE_MAXIMUM(8, Buttons),       \
      HID_RI_LOGICAL_MINIMUM(8, 0x00),        \
      HID_RI_LOGICAL_MAXIMUM(8, 0x01),        \
      HID_RI_REPORT_COUNT(8, Buttons),        \
      HID_RI_REPORT_SIZE(8, 0x01),            \
      HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE), \
      HID_RI_REPORT_COUNT(8, 0x01),           \
      HID_RI_REPORT_SIZE(8, (8 - (Buttons % 8))), \
      HID_RI_INPUT(8, HID_IOF_CONSTANT),      \
      HID_RI_USAGE_PAGE(8, 0x01),             \
      HID_RI_USAGE(8, 0x30),                  \
      HID_RI_USAGE(8, 0x31),                  \
      HID_RI_LOGICAL_MINIMUM(16, MinAxisVal), \
      HID_RI_LOGICAL_MAXIMUM(16, MaxAxisVal), \
      HID_RI_PHYSICAL_MINIMUM(16, MinPhysicalVal), \
      HID_RI_PHYSICAL_MAXIMUM(16, MaxPhysicalVal), \
      HID_RI_REPORT_COUNT(8, 0x02),           \
      HID_RI_REPORT_SIZE(8, ((((MinAxisVal >= -0xFF) && (MaxAxisVal <= 0xFF)) ? 8 : 16))), \
      HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | (AbsoluteCoords ? HID_IOF_ABSOLUTE : HID_IOF_RELATIVE)), \
      HID_RI_USAGE(8, 0x38),                  \
      HID_RI_LOGICAL_MINIMUM(8, -1),          \
      HID_RI_LOGICAL_MAXIMUM(8,  1),          \
      HID_RI_PHYSICAL_MINIMUM(8, 0),          \
      HID_RI_PHYSICAL_MAXIMUM(8, 0),          \
      HID_RI_REPORT_SIZE(8, 8),               \
      HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | (AbsoluteCoords ? HID_IOF_ABSOLUTE : HID_IOF_RELATIVE)), \
    HID_RI_END_COLLECTION(0),                   \
  HID_RI_END_COLLECTION(0)