init.c

Embest ATEB9200开发板部分测试程序。

//*----------------------------------------------------------------------------
//*         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           : init.c
//* Object              : Low level initialisations written in C
//* Creation            : ODi   06/26/2002
//* Enable the seception  JPP 03/jun/2003
//*----------------------------------------------------------------------------

#include "AT91RM9200.h"

//*----------------------------------------------------------------------------
//* Function Name       : AT91F_DBGU_Get
//* Object              : Get a string to USART manage Blackspace and echo
//* Input Parameters    : com descriptor, type string & val return value
//* Output Parameters   : none
//*----------------------------------------------------------------------------
unsigned int AT91F_DBGU_Get( char *val)
{
	if ((AT91F_US_RxReady((AT91PS_USART)AT91C_BASE_DBGU)) == 0)
	    return (1);
	else
	{
	*val= AT91F_US_GetChar((AT91PS_USART)AT91C_BASE_DBGU);
	 return (0);
	}
}

//*----------------------------------------------------------------------------
//* Function Name       : AT91F_DBGU_scanf
//* Object              : Get a string to USART manage Blackspace and echo
//* Input Parameters    : com descriptor, type string & val return value
//* Output Parameters   : none
//*----------------------------------------------------------------------------
void AT91F_DBGU_scanf(char * type,unsigned int * val)
{//* Begin
    unsigned int read = 0;
    char buff[10];
    unsigned int nb_read =0;

    while( (read != 0x0D) & (nb_read != sizeof(buff)) ) {
        //* wait the USART Ready for reception
	 while((AT91C_BASE_DBGU->DBGU_CSR  & AT91C_US_RXRDY) == 0 ) ;
        //* Get a char
	read = AT91C_BASE_DBGU->DBGU_RHR ;
        buff[nb_read]= (char)read;
        //* Manage Blackspace
        while((AT91C_BASE_DBGU->DBGU_CSR & AT91C_US_TXRDY) ==0)  {}
        if ((char)read == 0x08) {
            if ( nb_read != 0 ) {
              nb_read--;
              AT91C_BASE_DBGU->DBGU_THR = read;
            }
        }
        else {
          //* echo
          AT91C_BASE_DBGU->DBGU_THR = read;
          nb_read++;
        }
    }
    //* scan the value
    sscanf(buff,type,val);
}//* End

//*----------------------------------------------------------------------------
//* \fn    AT91F_DBGU_Printk
//* \brief This function is used to send a string through the DBGU channel (Very low level debugging)
//*----------------------------------------------------------------------------
void AT91F_DBGU_Printk(
	char *buffer) // \arg pointer to a string ending by \0
{
	while(*buffer != '\0') {
		while (!AT91F_US_TxReady((AT91PS_USART)AT91C_BASE_DBGU));
		AT91F_US_PutChar((AT91PS_USART)AT91C_BASE_DBGU, *buffer++);
	}
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_LowLevelInit
//* \brief This function performs very low level HW initialization
//*----------------------------------------------------------------------------
void AT91F_LowLevelInit()
{

	// Open PIO for DBGU
	AT91F_DBGU_CfgPIO();
	
	// Configure DBGU
	AT91F_US_Configure (
		(AT91PS_USART) AT91C_BASE_DBGU,          // DBGU base address
		18432000,                  // 48 MHz
		AT91C_US_ASYNC_MODE ,        // mode Register to be programmed
		115200,                   // baudrate to be programmed
		0);                        // timeguard to be programmed

	// Enable Transmitter and recivier
	AT91F_US_EnableTx((AT91PS_USART) AT91C_BASE_DBGU);
	AT91F_US_EnableRx((AT91PS_USART) AT91C_BASE_DBGU);

	AT91F_DBGU_Printk("AT91F_LowLevelInit()\n\r");
}