test_pdc2.c

来自「ARM9200开发板的ROM boot程序源码1.0」· C语言 代码 · 共 59 行

//*----------------------------------------------------------------------------
//*         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           : test_usart2.c
//* Object              : PDC Peripheral data Controller Test Library.
//*
//* 1.0 13/02/01 JPP    : Creation
//*----------------------------------------------------------------------------

//* --------------------------- include file ----------------------------------

#include    "periph/pdc2/lib_pdc2.h"


//*----------------------------------------------------------------------------
//* Function Name       : at91_test_pdc
//* Object              : Test PDC access register SSC.
//* Input Parameters    : <pdc2_pt> = PDC2 Descriptor pointer
//* Output Parameters   : None
//* Functions called    : None
//*----------------------------------------------------------------------------
int at91_test_pdc  ( StructPDC2 * pdc2_pt )
//* Begin
{
	u_int read_value;
	u_int write_value;
	//* init PDC2
	at91_pdc2_open(pdc2_pt);

	//* Test access to the controller register
	write_value=0;
	pdc2_pt->PDC2_PTCR = write_value;
	write_value= pdc2_pt->PDC2_PTCR;

	//* Reset all Counter register
	pdc2_pt->PDC2_RCR  = 0 ;
	pdc2_pt->PDC2_RNCR = 0 ;
	pdc2_pt->PDC2_TCR  = 0 ;
	pdc2_pt->PDC2_TNCR = 0 ;

	//* Reset all Pointer register
	pdc2_pt->PDC2_RPR  = 0 ;
	pdc2_pt->PDC2_RNPR = 0 ;
	pdc2_pt->PDC2_TPR  = 0 ;
	pdc2_pt->PDC2_TNPR = 0 ;

    //* Enables the RX and TX PDC transfer requests
    pdc2_pt->PDC2_PTCR = ( PDC_TXTEN | PDC_RXTEN) ;

//* End
}