usbhal.c

基于LPC2300平台的简易USB HID例程

/****************************************Copyright (c)**************************************************
**                               Guangzou ZLG-MCU Development Co.,LTD.
**                                      graduate school
**                                 http://www.zlgmcu.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name:			USBHAL.c
** Last modified Date:	2007-07-08
** Last Version:		V1.0
** Descriptions:		USBHAL.c, 硬件抽象层,设置 USB 设备的运行条件
**						USBHAL.c, Hardware abstract layer, configure the running condition of USB device
**------------------------------------------------------------------------------------------------------
** Created by:			郑明远 		MingYuan Zheng
** Created date:		2007-07-08
** Version:				V1.0
** Descriptions:		初始版本	The original version
**
**------------------------------------------------------------------------------------------------------
** Modified by:			
** Modified date:
** Version:				
** Descriptions:
**
**------------------------------------------------------------------------------------------------------
** Modified by: 
** Modified date:
** Version:	
** Descriptions: 
**
********************************************************************************************************/

/**************************************************************************************
PLL1:			USB device PLL clock

P1.30:   		VBUS — Indicates the presence of USB bus power.
P1.18:   		UP_LED  --- USB Good Link LED indicator.  
P2.9	 	 	SoftConnect --- signal used to switch an external 1.5K resistor under software control   
P0.29(Pin 10):	USB D+	 
P0.30(Pin 11):  USB D-

USB Interrupt VIC = 22
**************************************************************************************/

#include  "config.h"
#include  "USBConfig.h"
#include  "USBCI.h"
#include  "USBHAL.h"


#ifndef USBClkCtrl
#define  USBClkCtrl         (*(volatile unsigned long *)(0xFFE0CFF4))  
#endif

#ifndef USBClkSt
#define  USBClkSt           (*(volatile unsigned long *)(0xFFE0CFF8)) 
#endif

#ifndef USBPortSel
#define  USBPortSel         (*(volatile unsigned long *)(0xFFE0C110))	/* LPC2378 Only */
#endif


#define  DEV_CLK_EN         (0x01 << 1)
#define  PORTSEL_CLK_EN     (0x01 << 3)
#define  AHB_CLK_EN         (0x01 << 4)

/*******************************************************************************************************************
** 函数名称: USB_InitHareware					Name:	  USB_InitHareware
** 功能描述: 初始化 USB 设备控制器硬件			Function: Initialize the hardware of USB device controller 
********************************************************************************************************************/
void USB_InitHardware(void)
{
    INT32U clkctrl = DEV_CLK_EN | AHB_CLK_EN;

    USBClkCtrl = clkctrl;               /* 配置USB时钟控制寄存器 */
    while (!(USBClkSt & (DEV_CLK_EN | AHB_CLK_EN)));       
          
#if  USB_PORT2_EN
    USBClkCtrl |= PORTSEL_CLK_EN;
    while (!(USBClkSt & (PORTSEL_CLK_EN)));
    USBPortSel = 0x03;

    PINSEL0 &= ~(0x03 << 26);           /* P0.13 is LPC23xx USB Device(2) U2UP_LED */
    PINSEL0 |= (0x01 << 26);
    PINSEL0 &= ~(0x03 << 28);           /* P0.14 is LPC23xx USB Device(2) U2CONNECT */
    PINSEL0 |= (0x02 << 28);
       	
 	PINSEL1 &= ~(0x03U << 30);          /* P0.31 is USB2 D+ */
    PINSEL1 |= (0x01 << 30); 
  	PINSEL3 &= ~(0x03U << 28); 			/* P1.30  为 LPC23xx USB Device(1)和(2) 的VBUS */
 	PINSEL3 |= (0x02U << 28);	

#else

	PINSEL1 &= ~(0x03U << 26); 			/* P0.29 为 LPC23xx USB Device(1) 的D+ */
 	PINSEL1 |= (0x01U << 26);									
	
	PINSEL1 &= ~(0x03U << 28); 			/* P0.30 为 LPC23xx USB Device(1) 的D- */
 	PINSEL1 |= (0x01U << 28);			
 	
 	/* P2.9 is a GPIO */
 	PINSEL4 &= ~(0x03U << 18); 			/* P2.9  为 LPC23xx USB Device(1) 的SoftConnect */
 	//PINSEL4 |= (0x01U << 18);
 	FIO2DIR |= 0x01 << 9;				/* P2.9 is output pin */
 	FIO2SET |= 0x01 << 9;
 	
	PINSEL3 &= ~(0x03U << 28); 			/* P1.30  为 LPC23xx USB Device(1)和(2) 的VBUS */
 	PINSEL3 |= (0x02U << 28);		
 	
	PINSEL3 &= ~(0x03U << 4); 			/* P1.18  为 LPC23xx USB Device(1) UP_LED */
 	PINSEL3 |= (0x01U << 4); 		

#endif

  	PCONP |= 0x80000000;				/* 给USB控制器提供电源    power on USB controller */
}


/************************************************************
** Name	   : USB_Disconnect 
** Function: disconnect USB bus
************************************************************/
void USB_Disconnect(void)
{
	FIO2SET |= 0x01 << 9;
}

/************************************************************
** Name	   : USB_Connect
** Function: connect USB bus
************************************************************/
void USB_Connect(void)
{
	FIO2CLR |= 0x01 << 9;
}

/************************************************************
** Name	   : USB_Reconnect
** Function: reconnect USB bus
************************************************************/
void USB_Reconnect(void)
{
	INT32U clk_cnt;

	USB_Disconnect();							    /* disconnect USB bus */
    for (clk_cnt = 0;clk_cnt<= 0x1FFFF;clk_cnt++);  /* delay */
    
    USB_Connect();								    /* connect USB bus */
}


/*******************************************************************************************************************
** 函数名称: USB_USBDevIntConfig				Name:	  USB_USBDevIntConfig
** 功能描述: 配置USB设备控制器的中断			Function: Config the Interrupt of USB device controller 
********************************************************************************************************************/
void USB_USBDevIntConfig(void)
{
	INT32U tmp = EP_SLOW;
				
    // Clears the frame interrupt flag in USBDevIntClr
    USBDevIntClr = FRAME;									/* 禁止同步传输帧中断 */

	// Enables ep_slow and dev_stat interrupt only in USBDevIntEn 
    USBDevIntEn = tmp;										/* 使能复位中断, 低速中断 */
      
	// the EP_FAST interrupt is slow priority interrupt
    USBDevIntPri = 0; 				  						/* 使能端点中断为低优先级中断 */

#if DMA_ENGINE_EN
	tmp = (0x01 << 0) + (0x01 << 1);						/* 使能控制传输端点从机中断 */
#else
	tmp = (0x01 << 0) + (0x01 << 1) + (0x01 << 2) + 
	      (0x01 << 3) + (0x01 << 4) + (0x01 << 5);			/* 使能端点 0 ~ 5 从机中断 */
#endif
		
	// Enable Endpoint Interrupt: endpoint 0 ~ 5
	USBEpIntEn = tmp;	  									/* 使能物理端点 0 ~ 5中断 */
	
	// Routes all endp ints to the ep_slow int USBEpIntPri
    USBEpIntPri &= ~tmp;									/* 设置物理端点 0 ~ 5为低优先级中断 */

}

/*******************************************************************************************************
**                            End Of File
********************************************************************************************************/