usb_device_lib.c

来自「三星ARM9 s3c2410 usb device开发」· C语言 代码 · 共 138 行

#include "def.h"
#include "2410addr.h"
#include "2410lib.h"
#include "USB_device_lib.h"
#include "uart.h"


// *** End point information ***
//   EP0: control
//   EP1: bulk in end point
//   EP2: not used
//   EP3: bulk out end point
//   EP4: not used

// *** VERY IMPORTANT NOTE ***
// Every descriptor size of EP0 should be 8n+m(m=1~7).
// Otherwise, USB will not operate normally because the program
// doesn't prepare the case that the descriptor size is 8n+0.
// If the size of a descriptor is 8n, the 0 length packit should be sent. 
// Special thanks to E.S.Choi for reminding me of this USB specification.


// ===================================================================
// All following commands will operate only in case 
// - ep0_csr is valid.
// ===================================================================




void RdPktEp0(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        buf[i]=(U8)rEP0_FIFO;	
    }
}
    

void WrPktEp0(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        rEP0_FIFO=buf[i];	
    }
}


void RdPktEp1(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        buf[i]=(U8)rEP1_FIFO;	
    }
}

void WrPktEp1(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        rEP1_FIFO=buf[i];	
    }
}


void WrPktEp2(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        rEP2_FIFO=buf[i];	
    }
}


void RdPktEp3(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        buf[i]=(U8)rEP3_FIFO;	
    }
}


void RdPktEp4(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        buf[i]=(U8)rEP4_FIFO;	
    }
}


void Print_USB_SETUP_DATA(struct USB_SETUP_DATA descSetup0)
 {
    Uart_Printf("bmRequestType  = %x \n",descSetup0.bmRequestType);
    Uart_Printf("bRequest       = %x \n",descSetup0.bRequest);
    Uart_Printf("bValueL        = %x \n",descSetup0.bValueL);
    Uart_Printf("bValueH        = %x \n",descSetup0.bValueH);
    Uart_Printf("bIndexL        = %x \n",descSetup0.bIndexL);
    Uart_Printf("bIndexH        = %x \n",descSetup0.bIndexH);
    Uart_Printf("bLengthL       = %x \n",descSetup0.bLengthL);
    Uart_Printf("bLengthH       = %x \n",descSetup0.bLengthH);
 
 }



extern  ep0_csr;
void Ep0_Interrupt_Identify(void){
    if(rEP0_CSR & EP0_SETUP_END)
       Uart_Puts("Reason :[4].SETUP_END BIT IS SET\n");
    else if(rEP0_CSR & EP0_SENT_STALL)
       Uart_Puts("Reason :[3].SENT_STALL BIT IS SET\n");
    else if(rEP0_CSR & EP0_OUT_PKT_READY ) 
       Uart_Puts("Reason :[1].OUT_PKT_RDY BIT IS SET\n");
 
    else if((!(rEP0_CSR&EP0_IN_PKT_READY))&&(ep0_csr&EP0_IN_PKT_READY)) 
       Uart_Puts("Reason :[2].IN_PKT_RDY BIT IS CLEARED\n");
    else if((!(rEP0_CSR&EP0_DATA_END))&&(ep0_csr&EP0_DATA_END)) 
       Uart_Puts("Reason :[5].DATA_END BIT IS CLEARED\n");       
    else Uart_Puts("Unkown EP0 INTERRUPT !!!!\n");

}