usbh_hid_mouse.c

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/* Includes ------------------------------------------------------------------*/
#include "usbh_hid_mouse.h"
#include "usbh_hid_parser.h"


static USBH_StatusTypeDef USBH_HID_MouseDecode(USBH_HandleTypeDef *phost);

HID_MOUSE_Info_TypeDef    mouse_info;
uint32_t                  mouse_report_data[1];

/* Structures defining how to access items in a HID mouse report */
/* Access button 1 state. */
static const HID_Report_ItemTypedef prop_b1={
  (uint8_t *)mouse_report_data+0, /*data*/
  1,     /*size*/
  0,     /*shift*/
  0,     /*count (only for array items)*/
  0,     /*signed?*/
  0,     /*min value read can return*/
  1,     /*max value read can return*/
  0,     /*min value device can report*/
  1,     /*max value device can report*/
  1      /*resolution*/
};

/* Access button 2 state. */
static const HID_Report_ItemTypedef prop_b2={
  (uint8_t *)mouse_report_data+0, /*data*/
  1,     /*size*/
  1,     /*shift*/
  0,     /*count (only for array items)*/  
  0,     /*signed?*/
  0,     /*min value read can return*/
  1,     /*max value read can return*/
  0,     /*min value device can report*/
  1,     /*max value device can report*/
  1      /*resolution*/
};

/* Access button 3 state. */   
static const HID_Report_ItemTypedef prop_b3={
  (uint8_t *)mouse_report_data+0, /*data*/
  1,     /*size*/
  2,     /*shift*/
  0,     /*count (only for array items)*/
  0,     /*signed?*/
  0,     /*min value read can return*/
  1,     /*max value read can return*/
  0,     /*min vale device can report*/
  1,     /*max value device can report*/
  1      /*resolution*/
};

/* Access x coordinate change. */
static const HID_Report_ItemTypedef prop_x={
  (uint8_t *)mouse_report_data+1, /*data*/
  8,     /*size*/
  0,     /*shift*/
  0,     /*count (only for array items)*/  
  1,     /*signed?*/
  0,     /*min value read can return*/
  0xFFFF,/*max value read can return*/
  0,     /*min vale device can report*/
  0xFFFF,/*max value device can report*/
  1      /*resolution*/
};

/* Access y coordinate change. */
static const HID_Report_ItemTypedef prop_y={
  (uint8_t *)mouse_report_data+2, /*data*/
  8,     /*size*/
  0,     /*shift*/
  0,     /*count (only for array items)*/  
  1,     /*signed?*/
  0,     /*min value read can return*/
  0xFFFF,/*max value read can return*/
  0,     /*min vale device can report*/
  0xFFFF,/*max value device can report*/
  1      /*resolution*/
};


USBH_StatusTypeDef USBH_HID_MouseInit(USBH_HandleTypeDef *phost)
{
  HID_HandleTypeDef *HID_Handle =  (HID_HandleTypeDef *) phost->pActiveClass->pData;

  mouse_info.x=0;
  mouse_info.y=0;
  mouse_info.buttons[0]=0;
  mouse_info.buttons[1]=0;
  mouse_info.buttons[2]=0;
  
  mouse_report_data[0]=0;
  
  if(HID_Handle->length > sizeof(mouse_report_data))
  {
    HID_Handle->length = sizeof(mouse_report_data);
  }
  HID_Handle->pData = (uint8_t *)mouse_report_data;
  fifo_init(&HID_Handle->fifo, phost->device.Data, HID_QUEUE_SIZE * sizeof(mouse_report_data));

  return USBH_OK;  
}

HID_MOUSE_Info_TypeDef *USBH_HID_GetMouseInfo(USBH_HandleTypeDef *phost)
{
 if(USBH_HID_MouseDecode(phost)== USBH_OK)
 {
  return &mouse_info;
 }
 else
 {
  return NULL; 
 }
}

static USBH_StatusTypeDef USBH_HID_MouseDecode(USBH_HandleTypeDef *phost)
{
  HID_HandleTypeDef *HID_Handle = (HID_HandleTypeDef *) phost->pActiveClass->pData;
  
  if(HID_Handle->length == 0)
  {
    return USBH_FAIL;
  }
  /*Fill report */
  if(fifo_read(&HID_Handle->fifo, &mouse_report_data, HID_Handle->length) ==  HID_Handle->length)
  {
    
    /*Decode report */
    mouse_info.x = (int16_t )HID_ReadItem((HID_Report_ItemTypedef *) &prop_x, 0);
    mouse_info.y = (int16_t )HID_ReadItem((HID_Report_ItemTypedef *) &prop_y, 0);
    
    mouse_info.buttons[0]=(uint8_t)HID_ReadItem((HID_Report_ItemTypedef *) &prop_b1, 0);
    mouse_info.buttons[1]=(uint8_t)HID_ReadItem((HID_Report_ItemTypedef *) &prop_b2, 0);
    mouse_info.buttons[2]=(uint8_t)HID_ReadItem((HID_Report_ItemTypedef *) &prop_b3, 0);
    
    return USBH_OK;  
  }
  return   USBH_FAIL;
}

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/