boot_task.c

t89c51cc(atmel)单片机下的can协议下bootleader的源代码

/*C*****************************************************************************
* FILE_NAME         : bootloader.c                                             
*----------------------------------------------------------------------------
* FILE_CREATED_BY   : BERTHY JS                                             
* FILE_CREATION_DATE: 16/05/00                                              
*----------------------------------------------------------------------------
* FILE_PURPOSE:    
*
******************************************************************************/

/*_____ I N C L U D E - F I L E S ____________________________________________*/

#include "config.h"
#include "can_lib.h"
#include "bootloader.h"
/*_____ P R I V A T E - F U N C T I O N S ____________________________________*/

extern void boot_manage_display (void);
extern void fct_calc_nb_byte (void);
extern void fct_load_data (Uchar nb_data);

/*_____ G L O B A L S ________________________________________________________*/

Uint16 address_start;
Uint16 address_end;
Uint16 size_bloc;
Uint16 nb_bloc;
Uint16 nb_octet_rest;

extern Uchar dlc_rx;


/*F****************************************************************************
* FUNCTION_NAME:  boot_task                                                 
*----------------------------------------------------------------------------
* FUNCTION_AUTHOR: BERTHY J.S.                                              
* FUNCTION_DATE  :                                          
*----------------------------------------------------------------------------
* FUNCTION_PURPOSE: 
* This task managed all request from isp.
* If Some request are similar to user api call then used api_task.  
* FUNCTION_INPUTS : void                                                          
* FUNCTION_OUTPUTS: void                                                       
******************************************************************************/
void boot_task(void)
{

unsigned char	align;

  if (f_new_protoc_command && 
      (api_command == WAIT_COMMAND)&&
      f_communication_open && !f_command_ongoing)
  {
    f_new_protoc_command = 0;
    f_command_ongoing    = 1;

    switch(can_id - offset_id_copy)
    {

/* CAN_ID_PROG_START (Only for isp)
 * This command prepare information for flash prog.
 * nb_octet_rest : nb of byte to program
 * nb_bloc_128   : nb of full column latch
 * size_bloc		 : size of the first bloc 
 */
      case CAN_ID_PROG_START: 
      {
		    f_command_ongoing = 0;
        f_frame_to_send 	= 1;
        can_ctrl       		= 0x00;
			
        if (can_rx[0] == 0)				/* Flash access */
				{
					f_flash_eeprom_area = 0;
				}
				else  										/* Eeprom access */
				{
					f_flash_eeprom_area = 1;
				}

				fct_calc_nb_byte();
      
        align = FALSE; 
    
        /* nb_bloc = premier bloc + nb blocs complets */
	    /* size_bloc = nb octet ds premier bloc imcomplet: si align