init.c

this document is source code for arm9 of atmel

 //  ----------------------------------------------------------------------------
 //          ATMEL Microcontroller Software Support  -  ROUSSET  -
 //  ----------------------------------------------------------------------------
 //  DISCLAIMER:  THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
 //  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 //  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 //  DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
 //  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 //  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 //  OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 //  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 //  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 //  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //  ----------------------------------------------------------------------------
//*----------------------------------------------------------------------------
//* File Name           : init.c
//* Object              : Low level initialisations written in C
//* Creation            : HIi   10/10/2003
//*                       JPP   21/Feb/06 suppress AT91F_InitSdram (Check Cstartup)
//*                             and suppress some unused function
//*----------------------------------------------------------------------------
#include "init.h"


//#define AT91C_PLLA_VALUE 	/*0x2060BF09*/0x20483f0e//0x2060BF09 // crystal= 18.432MHz
//#define AT91C_SDRAM 		((volatile unsigned int *)0x20000000)

// The following functions must be written in ARM mode this function called directly
// by exception vector
extern void AT91F_Spurious_handler(void);
extern void AT91F_Default_IRQ_handler(void);
extern void AT91F_Default_FIQ_handler(void);
extern void IRQ_Handler_Entry(void);

//*----------------------------------------------------------------------------
//* \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_Wait4KeyPressed
//* \brief
//*----------------------------------------------------------------------------
unsigned int AT91F_Wait4KeyPressed(void)
{
    while(!AT91F_US_RxReady((AT91PS_USART)AT91C_BASE_DBGU));
    return((int)AT91F_US_GetChar((AT91PS_USART)AT91C_BASE_DBGU));
}


//*--------------------------------------------------------------------------------------
//* \fn    AT91F_Configure_DBGU
//* \brief
//*--------------------------------------------------------------------------------------
void AT91F_Configure_DBGU (unsigned int uClock)
{
	// Open PIO for DBGU
	AT91F_DBGU_CfgPIO();

	// Configure DBGU
	AT91F_US_Configure(
		(AT91PS_USART)AT91C_BASE_DBGU, // DBGU base address
		uClock,            			   // Master Clock
		AT91C_US_ASYNC_MODE,           // mode Register to be programmed
		115200,                        // baudrate to be programmed
		0                              // timeguard to be programmed
	);

	// Enable Transmitter
	AT91F_US_EnableTx((AT91PS_USART)AT91C_BASE_DBGU);
	// Enable Receiver
	AT91F_US_EnableRx((AT91PS_USART)AT91C_BASE_DBGU);
}