main.c

AT91SAM7S-BasicUSB的源代码

//*--------------------------------------------------------------------------------------
//*      ATMEL Microcontroller Software Support  -  ROUSSET  -
//*--------------------------------------------------------------------------------------
//* The software is delivered "AS IS" without warranty or condition of any
//* kind, either express, implied or statutory. This includes without
//* limitation any warranty or condition with respect to merchantability or
//* fitness for any particular purpose, or against the infringements of
//* intellectual property rights of others.
//*--------------------------------------------------------------------------------------
//* File Name           : Boot_loader main file
//* Object              :
//* Translator          :
//* 1.0 19/03/01 HI	: Creation
//* 1.1 02/10/02 FB	: Add on Svc DataFlash
//* 1.2 13/Sep/04 JPP	: Add DBGU
//* 1.3 16/Dec/04 JPP	: Add USART and enable reset
//*--------------------------------------------------------------------------------------

#include "board.h"
#include "dbgu.h"
#include "cdc_enumerate.h"

#define MSG_SIZE 				4096

#define USART_COM

//* external function

extern void Usart_init ( void );
extern void AT91F_US_Put( char *buffer, unsigned int length); // \arg pointer to a string ending by \0
extern void Trace_Toggel_LED( unsigned int led) ;

struct _AT91S_CDC 	pCDC;

//*----------------------------------------------------------------------------
//* \fn    AT91F_USB_Open
//* \brief This function Open the USB device
//*----------------------------------------------------------------------------
void AT91F_USB_Open(void)
{
    // Set the PLL USB Divider
    AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;

    // Specific Chip USB Initialisation
    // Enables the 48MHz USB clock UDPCK and System Peripheral USB Clock
    AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_UDP;
    AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_UDP);

    // Enable UDP PullUp (USB_DP_PUP) : enable & Clear of the corresponding PIO
    // Set in PIO mode and Configure in Output
    AT91F_PIO_CfgOutput(AT91C_BASE_PIOA,AT91C_PIO_PA16);
    // Clear for set the Pul up resistor
    AT91F_PIO_ClearOutput(AT91C_BASE_PIOA,AT91C_PIO_PA16);

    // CDC Open by structure initialization
    AT91F_CDC_Open(&pCDC, AT91C_BASE_UDP);
}

//*--------------------------------------------------------------------------------------
//* Function Name       : main
//* Object              :
//*--------------------------------------------------------------------------------------
int main ( void )
{
	char data[MSG_SIZE];
	unsigned int length;
#ifndef USART_COM
//	char message[30];
    // Init trace DBGU
//    AT91F_DBGU_Init();
//    AT91F_DBGU_Printk("\n\r-I- BasicUSB\n\r 0) Set Pull-UP 1) Clear Pull UP\n\r");
#else
    // Set Usart in interrupt
    Usart_init();
#endif

     // Enable User Reset and set its minimal assertion to 960 us
     AT91C_BASE_RSTC->RSTC_RMR = AT91C_RSTC_URSTEN | (unsigned int)(0x4<<8) | (unsigned int)(0xA5<<24);

    // Init USB device
    AT91F_USB_Open();
    // Init USB device
    while (1)
   {
	// Check enumeration
	if (pCDC.IsConfigured(&pCDC)) {
#ifndef USART_COM
        // Loop
	   length = pCDC.Read(&pCDC, data, MSG_SIZE);
	   pCDC.Write(&pCDC, data, length);
//	   data[length]=0;
//	   sprintf(message,"-I- Len %d: %s \n\r",length,data);
	// send char
//           AT91F_DBGU_Frame(message);
#else
        // Loop
	  length = pCDC.Read(&pCDC, data, MSG_SIZE);
	  data[length]=0;
	  Trace_Toggel_LED( LED1) ;
          AT91F_US_Put(data,length);
#endif
	}
   }
}