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Bootloader Code Listing (V3.0)

// TI File $Revision: /main/2 $

// Checkin $Date: January 10, 2005 14:39:37 $

//###########################################################################

// FILE: Parallel_Boot.c

// TITLE: 280x Parallel Port I/O boot routines

// Functions:

// Uint32 Parallel_Boot(void)

// inline void Parallel_GPIOSelect(void)

// inline Uint16 Parallel_CheckKeyVal(void)

// Uint16 Parallel_GetWordData_8bit()

// Uint16 Parallel_GetWordData_16bit()

// void Parallel_WaitHostRdy(void)

// void Parallel_HostHandshake(void)

// Notes:

//###########################################################################

// $TI Release:$

// $Release Date:$

//###########################################################################

#include "DSP280x_Device.h"

#include "280x_Boot.h"

// Private function definitions

inline void Parallel_GPIOSelect(void);

inline Uint16 Parallel_CheckKeyVal(void);

Uint16 Parallel_GetWordData_8bit(void);

Uint16 Parallel_GetWordData_16bit(void);

void Parallel_WaitHostRdy(void);

void Parallel_HostHandshake(void);

// External function definitions

extern void CopyData(void);

extern Uint32 GetLongData(void);

extern void ReadReservedFn(void);

#define HOST_CTRL GPIO27 // GPIO27 is the host control signal

#define DSP_CTRL GPIO26 // GPIO26 is the DSP's control signal

#define HOST_DATA_NOT_RDY GpioDataRegs.GPADAT.bit.HOST_CTRL!=0

#define WAIT_HOST_ACK GpioDataRegs.GPADAT.bit.HOST_CTRL!=1

// Set (DSP_ACK) or Clear (DSP_RDY) GPIO 17

#define DSP_ACK GpioDataRegs.GPASET.bit.DSP_CTRL = 1;

#define DSP_RDY GpioDataRegs.GPACLEAR.bit.DSP_CTRL = 1;

#define DATA GpioDataRegs.GPADAT.all

//#################################################

// Uint32 Parallel_Boot(void)

//--------------------------------------------

// This module is the main Parallel boot routine.

// It will load code via GP I/O port B.

// This boot mode accepts 8-bit or 16-bit data.

// 8-bit data is expected to be the order LSB

// followed by MSB.

// This function returns a entry point address back

// to the InitBoot routine which in turn calls

// the ExitBoot routine.

//--------------------------------------------

74 Bootloader Code Overview SPRU722C – November 2004 – Revised October 2006

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Brand	Texas Instruments
Model	TMS320*2801 Series
Category	Computer Hardware
Language	English

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