usb_dongle.c

这是nrf24lu1的无线鼠标源代码,应用平台是keil c

/* Copyright (c) 2007 Nordic Semiconductor. All Rights Reserved.
 *
 * The information contained herein is confidential property of 
 * Nordic Semiconductor. The use, copying, transfer or disclosure 
 * of such information is prohibited except by express written
 * agreement with Nordic Semiconductor.
 */

/** @file
 * Implementation of the USB interface functions.
 *
 * @author Runar Kjellhaug
 *
 * @addtogroup usb_code
 * @{
 */


#include "usb_dongle.h"
#include "usb_regs.h"
#include "f3xx_usb0_interruptserviceroutine.h"
#include "f3xx_usb0_reporthandler.h"
#include "wdp_common.h"
#include "fap.h"

extern xdata BufferStructure in_buffer, out_buffer;
extern bool ce_state;

//-----------------------------------------------------------------------------
// Global Variable Declarations
//-----------------------------------------------------------------------------

extern uint8_t EP_STATUS[];

void usb_init(void)
{
  POLL_WRITE_BYTE (POWER, 0x08);        // Force Asynchronous USB Reset

  POLL_WRITE_BYTE (IN1IE, 0x0f);        // Enable Endpoint 0-3 in interrupts
  POLL_WRITE_BYTE (OUT1IE,0x0f);        // Enable Endpoint 0-3 out interrupts

  POLL_WRITE_BYTE (CMIE, 0x07);         // Enable Reset, Resume, and Suspend
                                        // interrupts
  USB0XCN = 0xE0;                       // Enable transceiver; select full speed
  POLL_WRITE_BYTE (CLKREC,0x80);        // Enable clock recovery, single-step
                                        // mode disabled
  EIP1 |= 0x02;                       // Give the USB interrupt a higher priority
  EIE1 |= 0x02;                         // Enable USB0 Interrupts
    
                                        // Enable USB0 by clearing the USB
  POLL_WRITE_BYTE (POWER, 0x01);        // Inhibit Bit and enable suspend detection
}

//-----------------------------------------------------------------------------
// send_usb_packet
//-----------------------------------------------------------------------------
//
// Return Value - None
// Parameters - Report ID that's used to call the appropriate IN handler
//
// This function can be called by other routines to force an IN packet
// transmit.  It takes as an input the Report ID of the packet to be
// transmitted.
//-----------------------------------------------------------------------------

void send_usb_packet(uint8_t report_id)
{
  bool ea_state;
  uint8_t ControlReg;
  uint8_t ep_num;
  uint8_t ep_addr;

  ea_state = EA;
  EA = 0;
  
  if (report_id == 0) // Mouse
  {
    ep_num = 1;
    ep_addr = FIFO_EP1;
  }
  else if (report_id == 1) // Keyboard
  {
    ep_num = 2;
    ep_addr = FIFO_EP2;
  }
  else if (report_id == 2)  // Remote
  {
    ep_num = 3;
    ep_addr = FIFO_EP3;
  }
  else
  {
    EA = ea_state;
    return;
  }

  POLL_WRITE_BYTE(INDEX, ep_num);        // Set index to the right EP register
  POLL_READ_BYTE (EINCSR1, ControlReg);  // Read control register for the EP

  if (EP_STATUS[ep_num] == EP_HALT)      // If endpoint is currently halted, send a stall
  {
    POLL_WRITE_BYTE(EINCSR1, rbInSDSTL);
  }
  else if(EP_STATUS[ep_num] == EP_IDLE)
  {
    EP_STATUS[ep_num] = EP_TX;                   // the state will be updated inside the ISR handler
    if (ControlReg & rbInSTSTL)             // Clear sent stall if last packet returned a stall
    {
      POLL_WRITE_BYTE(EINCSR1, rbInCLRDT);
    }

    if (ControlReg & rbInUNDRUN)            // Clear underrun bit if it was set
    {
      POLL_WRITE_BYTE(EINCSR1, 0x00);
    }
    ReportHandler_IN_ISR(report_id);

    // Put new data on Fifo
    Fifo_Write_InterruptServiceRoutine(ep_addr, in_buffer.Length, (uint8_t*)in_buffer.Ptr);
    POLL_WRITE_BYTE (EINCSR1, rbInINPRDY);  // Set In Packet ready bit, indicating fresh data on FIFO 1
  }
  
  EA = ea_state;
}

/** @} */