c62x.cpp

C6000系列开发板之6701相关文档机说明

#include "stdafx.h"

#include "C62x.h"

/*-------------------------------------------------------------------------*/
/*  Write one word (32 bits) to DSP memory                                 */
/*-------------------------------------------------------------------------*/
void WriteWord2Mem( LPVOID hHpi, ULONG ulDataAddr, ULONG ulDataWord )
{
	ULONG       ulLength;
	ULONG       ulReturnedLength;

	ulLength = 4;
	ulReturnedLength = ulLength;
	if ( !evm6x_hpi_write( hHpi, &ulDataWord,
							   &ulReturnedLength, ulDataAddr) ) exit(6);
	if ( ulLength != ulReturnedLength ) exit(7);
}

/*-------------------------------------------------------------------------*/
/*  Read one word (32 bits) from DSP memory                                */
/*-------------------------------------------------------------------------*/
void ReadWord2Mem( LPVOID hHpi, ULONG ulDataAddr, ULONG *ulDataWord )
{
	ULONG       ulLength;
	ULONG       ulReturnedLength;

	ulLength = 4;
	ulReturnedLength = ulLength;
	if ( !evm6x_hpi_read( hHpi, ulDataWord,
							   &ulReturnedLength, ulDataAddr) ) exit(6);
	if ( ulLength != ulReturnedLength ) exit(7);
}

void InitDSP(HANDLE &hBd, LPVOID &hHpi)
{
	// Board index
	short  iBd = 0;
	// Exclusive open = TRUE
	BOOL   bExcl = 1;
	// Map selector = MAP1
	short  iMp = 1;
	// DSP boot mode
	EVM6XDLL_BOOT_MODE mode = HPI_BOOT_MAP0;

	// COFF load verbose mode = FALSE
	BOOL bVerbose = 0;
	// Clear bss mode = FALSE
	BOOL bClr = 0;
	// Dump mode = FALSE
	BOOL bDump = 0;

	// COFF file name
	static char CoffNam[] = "..\\dsp\\gather.out"; 

	hBd = NULL; 
	hHpi = NULL;
	
	/*-----------------------------------------------------------------------*/
	/* Open a driver connection to a specific [Mc]EVM6x board.               */
	/*-----------------------------------------------------------------------*/

	hBd = evm6x_open( iBd, bExcl );
	if ( hBd == INVALID_HANDLE_VALUE ) exit(1);

	/*-----------------------------------------------------------------------*/
	/* Cause a hardware reset on the target board.                           */
	/*-----------------------------------------------------------------------*/

	if ( !evm6x_reset_board(hBd) ) exit(2);

	/*-----------------------------------------------------------------------*/
	/* Set board configuration.				                                 */
	/*-----------------------------------------------------------------------*/
	if ( !evm6x_set_board_config(hBd, DSP_CLOCK_NORMAL, 
		LITTLE_ENDIAN_MODE, 0XFF) )
		exit(0);

	/*-----------------------------------------------------------------------*/
	/* Set the boot mode and cause a DSP reset.                              */
	/*-----------------------------------------------------------------------*/

	mode = iMp ? HPI_BOOT : HPI_BOOT_MAP0;
	if ( !evm6x_reset_dsp(hBd,mode) ) exit(3);

	/*-----------------------------------------------------------------------*/
	/* Establish a connection to the HPI of a target board.                  */
	/*-----------------------------------------------------------------------*/

	hHpi = evm6x_hpi_open(hBd);
	if ( hHpi == NULL ) exit(4); 

	/*-----------------------------------------------------------------------*/
	/* Initialize EMIF registers                                             */
	/*-----------------------------------------------------------------------*/

	if ( !evm6x_init_emif(hBd, hHpi) ) exit(5);

	/*-----------------------------------------------------------------------*/
	/* set Aux DMA priority higher than CPU                                  */
	/*-----------------------------------------------------------------------*/
	/*  Due to the default priority of the auxiliary DMA channel used for    */
	/*  HPI accesses, the CPU can prevent HPI accesses from completing for   */
	/*  an indeterminate amount of time.  This can occur when the CPU is     */
	/*  very active on the external memory interface, such as while executing*/
	/*  code from external memory.  This condition manifests itself as a     */
	/*  hung PCI bus.  To prevent this condition, the value 0x10 can be      */
	/*  written to the DMA Auxiliary Control Register of the 6201 (at        */
	/*  address 0x01840070).  This elevates the priority of the auxiliary    */
	/*  DMA channel above all other DMA channels and above the CPU.          */
	/*-----------------------------------------------------------------------*/

	WriteWord2Mem( hHpi, 0x01840070 /*Addr*/, 0x00000010 /*Data*/ );

	/*-----------------------------------------------------------------------*/
	/* Read a COFF file and write the data to DSP memory.                    */
	/*-----------------------------------------------------------------------*/

	if (!evm6x_coff_load(hBd,hHpi,CoffNam,bVerbose,bClr,bDump)) exit(8);

	/*-----------------------------------------------------------------------*/
	/* Release the DSP from the halted state                                 */
	/*-----------------------------------------------------------------------*/

	if (!evm6x_unreset_dsp(hBd)) exit(10);
}

void CloseDSP(HANDLE hBd, LPVOID hHpi)
{
	/*-----------------------------------------------------------------------*/
	/* Close the HPI session started with evm6x_hpi_open()                   */
	/*-----------------------------------------------------------------------*/

	if (!evm6x_hpi_close(hHpi)) exit(9);

	/*-----------------------------------------------------------------------*/
	/* Close a previously opened driver connection to a board.               */
	/*-----------------------------------------------------------------------*/

	if (!evm6x_close(hBd)) exit(16);
}