//-----------------------------------------------------------------------------
// FUNCTION: main
// SCOPE: Bootloader application system function
// DESCRIPTION: bootloader main function
// RETURNS: 0
//-----------------------------------------------------------------------------
int main(void)
{
volatile unsigned long loop_counter = 0; // counter of loop without received frame
Byte enableBootMode = 0; // 0: enter APP, 1: enter BOOT mode, 2: enter verify mode
DisableInterrupts;
//WDG_Disable(); //watchdog can be enable or disabled in kinetis_sysinit.c
INIT_CLOCKS_TO_MODULES; // init clock module
Boot_Button_Init(); // init SW1 button (PTC3 port) on FRDM_KL26 board
INIT_BOOT_LED;
//condition for entering boot:
if(((*(unsigned long*)(RELOCATED_VECTORS + 8)) == 0xffffffff) //1. no valid code in APP vector section,
|| Boot_StrCompare(( Byte*)APPOK_START_ADDRESS, str_app_ok, APPOK_LENGTH) == CHECK_FAIL //2."APP_OK" is wrong in address APPOK_START_ADDRESS.
|| ((GPIO_PDIR_REG(BOOT_PIN_ENABLE_GPIO_BASE) & (1 << BOOT_PIN_ENABLE_NUM)) == 0) //3. SW1 is pressed
|| (AppIDC == 0x0000000B)) //4. App request boot
{
enableBootMode = 1; // enable boot
BOOT_LED_ON;
AppIDC = 0;
}
else if (AppIDC == 0x0000000A) // App request verify
{
enableBootMode = 2; // enable verify mode
BOOT_LED_ON;
AppIDC = 0;
}
if(enableBootMode)
{
// if use external clock
#ifdef USE_EXTERNAL_CLOCK
Boot_Init_Clock( );
#endif
PIN_INIT_AS_UART; // set PTA1/UART0_RX and PTA2/UART0_TX pins as UART
UART_Initialization(); // init UART module
}
////////////////////////////////////////////////////////////////////////
//BOOT Model
////////////////////////////////////////////////////////////////////////
while(enableBootMode) // enter boot or verify mode, execute all command from GUI
{
volatile Byte frame_start_flag = 0; // if frame header is received. 1: receive $, start to receive frame; 0: no $ received
volatile Byte frame_length = 0xFF; // SCI received frame length, initialized as 0xFF
volatile Byte data_length = 0;
volatile Byte buff_index = 1; // receive buffer index for sci_buffer[]
volatile Byte data_checked = 0; // check frame end 0xAA 0x55. 1: correct frame ; 0: wrong frame
FLASH_Initialization();
sci_buffer[0] = UART_GetChar();
if( sci_buffer[0] == '$') //check frame header: whether it is '$'
{
loop_counter = 0;
frame_start_flag = 1;
}
if(frame_start_flag == 1)
{
sci_buffer[1] = UART_GetChar(); // sci_buffer[1] is the station number
UART_GetChar(); // sci_buffer[2] is reserved
sci_buffer[3] = UART_GetChar(); // sci_buffer[3] is the Data length
data_length = sci_buffer[3];
frame_length = 4 + sci_buffer[3] + 2; // frame_length = frame head + data + frame end
buff_index = 4;
while(data_length --)
sci_buffer[buff_index ++] = UART_GetChar();
sci_buffer[buff_index ++] = UART_GetChar(); // frame end. It should be 0xAA
sci_buffer[buff_index ++] = UART_GetChar(); // frame end. It should be 0x55
frame_start_flag = 0;
}
if((sci_buffer[frame_length-2] == 0xAA) && (sci_buffer[frame_length-1] == 0x55)) //Check if Frame end is correct
{
data_checked = 1; // Correct frame received.
}
// all the data in frame was correctly received (data_checked = 1) above, now perform frame analysis below.
// sci_buffer[] now is switched to tx buffer
if(data_checked == 1)
{
Byte i = 0;
Byte j = 0;
Byte s19length = 0;
Byte s19buffer[WR_BLOCK_BYTE]; //extract app file burning code from received frame, store them to s19buffer[]
WDG_Refresh();
switch(sci_buffer[4])
{
case 'I': // receive 'I' command, send version information to UART
i = 4;
while((sci_buffer[i] = Identifier[i-4]) !='\0') //assign chip part number info to sci_buffer[]
{
i++;
}
sci_buffer[3] = i - 4; // tx data length in one frame
Boot_Send(sci_buffer);
if(enableBootMode == 1) // if in boot mode
FLASH_EraseSector((LWord)APPOK_START_ADDRESS); //erase APP_OK
break;
case 'E': // receive 'E' command, erase sector, then send confirm frame to UART
Boot_ReadAddress();
if(!( FLASH_EraseSector(address.complete)))
{
sci_buffer[3] = 00;
Boot_Send(sci_buffer);
}
break;
case'W': // receive 'W' command, extract app burning code, program flash. then send confirm frame to UART
Boot_ReadAddress();
s19length = sci_buffer[8];
for(j=0,i=9;j<s19length;j++,i++) // extract the prepared writing data from sci_buff[] to S19buffer[]
{
s19buffer[j] = sci_buffer[i];
}
if(!(FLASH_ProgramSectionByLongs (address.complete, (LWord*)s19buffer, s19length/4)))
{
sci_buffer[3] = 00;
Boot_Send(sci_buffer);
break;
}
case'R': // receive 'R' command, read out the memory data, then send the data in frame to UART
Boot_ReadAddress();
s19length = sci_buffer[8];
for(i=0;i<s19length;i++)
{
sci_buffer[i + 4] = ((Byte*)(address.complete))[i];
}
sci_buffer[3] = s19length;
Boot_Send(sci_buffer);
break;
case'G': // receive 'G' command, go to app.
if(enableBootMode == 1)
FLASH_ProgramSectionByLongs ((LWord)APPOK_START_ADDRESS, (LWord*)str_app_ok, APPOK_LENGTH/4);
Boot_Cpu_SystemReset( );
// if we want to jump to user application, we need to deinitialize used modules and switch MCG back to FEI mode
break;
default :
break;
}// end switch(sci_buffer[4])
frame_start_flag = 0;
for (buff_index = 0; buff_index<FRAME_BUFF_LENGTH; buff_index++) // clear sci_buffer[]
sci_buffer[buff_index] = 0;
}// end if(data_checked == 1)
loop_counter ++;
if(loop_counter >= 10 && enableBootMode == 2) // 100 * timeout of UART_GetChar();
{
Boot_Cpu_SystemReset( );
}
}// end while(enableBootMode)
// deinitialization of used modules
UART_Deinitialization();
DEINIT_BOOT_LED;
DEINIT_CLOCKS_TO_MODULES;
// relocate vector table
SCB_VTOR = RELOCATED_VECTORS;
AppIDC = 0;
// Jump to user application
JumpToUserApplication(*((unsigned long*)RELOCATED_VECTORS), *((unsigned long*)(RELOCATED_VECTORS+4)));
return 0;
} // end main
//-----------------------------------------------------------------------------
// FUNCTION: main
// SCOPE: Bootloader application system function
// DESCRIPTION: bootloader main function
// RETURNS: 0
//-----------------------------------------------------------------------------
int main(void)
{
volatile unsigned long loop_counter = 0; // counter of loop without received frame
Byte enableBootMode = 0; // 0: enter APP, 1: enter BOOT mode, 2: enter verify mode
//Byte s19buffer[WR_BLOCK_BYTE] = {1}; //extract app file burning code from received frame, store them to s19buffer[]
DisableInterrupts;
INIT_CLOCKS_TO_MODULES; // init clock module
Boot_Button_Init(); // init SW3 button (PTC3 port) on FRDM_K22 board
INIT_BOOT_LED;
// condition for entering boot:
if(((*(unsigned long*)(RELOCATED_VECTORS + 8)) == 0xffffffff) //1. no valid code in APP vector section,
|| Boot_StrCompare(( Byte*)APPOK_START_ADDRESS, str_app_ok, APPOK_LENGTH) == CHECK_FAIL //2."APP_OK" is wrong in address APPOK_START_ADDRESS.
|| ((GPIO_PDIR_REG(BOOT_PIN_ENABLE_GPIO_BASE) & (1 << BOOT_PIN_ENABLE_NUM)) == 0) //3. SW1 is pressed
|| (AppIDC == 0x0000000B)) //4. App request boot
{
enableBootMode = 1; // enable boot
BOOT_LED_ON;
AppIDC = 0;
}
else if (AppIDC == 0x0000000A) // App request verify
{
enableBootMode = 2; // enable verify mode
BOOT_LED_ON;
AppIDC = 0;
}
if(enableBootMode)
{
// if use external clock
#ifdef USE_EXTERNAL_CLOCK
Boot_Init_Clock();
#endif
PIN_INIT_AS_UART; // set PTEA1/UART1_RX and PTE0/UART1_TX pins as UART
UART_Initialization(); // init UART module
}
////////////////////////////////////////////////////////////////////////
//BOOT Model
////////////////////////////////////////////////////////////////////////
while(enableBootMode) // enter boot or verify mode, execute all command from GUI
{
volatile Byte frame_start_flag = 0; // if frame header is received. 1: receive $, start to receive frame; 0: no $ received
volatile Byte frame_length = 0xFF; // SCI received frame length, initialized as 0xFF
volatile Byte data_length = 0;
volatile Byte buff_index = 1; // receive buffer index for sci_buffer[]
volatile Byte data_checked = 0; // check frame end 0xAA 0x55. 1: correct frame ; 0: wrong frame
WDG_Refresh();
FLASH_Initialization();
sci_buffer[0] = UART_GetChar();
if( sci_buffer[0] == '$') //check frame header: whether it is '$'
{
loop_counter = 0;
frame_start_flag = 1;
}
if(frame_start_flag == 1)
{
sci_buffer[1] = UART_GetChar(); // sci_buffer[1] is the station number
UART_GetChar(); // sci_buffer[2] is reserved
sci_buffer[3] = UART_GetChar(); // sci_buffer[3] is the Data length
data_length = sci_buffer[3];
frame_length = 4 + sci_buffer[3] + 2; // frame_length = frame head + data + frame end
buff_index = 4;
while(data_length --)
sci_buffer[buff_index ++] = UART_GetChar();
sci_buffer[buff_index ++] = UART_GetChar(); // frame end. It should be 0xAA
sci_buffer[buff_index ++] = UART_GetChar(); // frame end. It should be 0x55
frame_start_flag = 0;
}
if((sci_buffer[frame_length-2] == 0xAA) && (sci_buffer[frame_length-1] == 0x55)) //Check if Frame end is correct
{
data_checked = 1; // Correct frame received.
}
// all the data in frame was correctly received (data_checked = 1) above, now perform frame analysis below.
// sci_buffer[] now is switched to tx buffer
if(data_checked == 1)
{
Byte i = 0;
Byte j = 0;
Byte burn_data_length = 0;
Byte s19buffer[WR_BLOCK_BYTE]; //extract app file burning code from received frame, store them to s19buffer[]
//WDG_Refresh();
switch(sci_buffer[4])
{
case 'I': // receive 'I' command, send version information to UART
i = 4;
while((sci_buffer[i] = MCU_Identification.targ_name[i-4]) !='\0') //assign chip part number info to sci_buffer[]
{
i++;
}
sci_buffer[i++] = '#';
j = i;
while((sci_buffer[i] = MCU_Identification.Boot_version[i-j]) !='\0') //assign bootloader version info to sci_buffer[]
{
i++;
}
sci_buffer[i++] = '#';
sci_buffer[i++] = (MCU_Identification.wrblk & 0xFF00)>>8; //assign write block size
sci_buffer[i++] = MCU_Identification.wrblk & 0x00FF;
sci_buffer[i++] = (MCU_Identification.erblk & 0xFF00)>>8; //assign erase block size
sci_buffer[i++] = MCU_Identification.erblk & 0x00FF;
sci_buffer[i++] = MCU_Identification.addr_limit.Bytes.hl; //assign MCU Flash end address
sci_buffer[i++] = MCU_Identification.addr_limit.Bytes.lh;
sci_buffer[i++] = MCU_Identification.addr_limit.Bytes.ll;
sci_buffer[i++] = MCU_Identification.dontcare_addrl.Bytes.hl; //assign bootloader dont care memory start adddress
sci_buffer[i++] = MCU_Identification.dontcare_addrl.Bytes.lh;
sci_buffer[i++] = MCU_Identification.dontcare_addrl.Bytes.ll;
sci_buffer[i++] = MCU_Identification.dontcare_addrh.Bytes.hl; //assign bootloader dont care memory end adddress
sci_buffer[i++] = MCU_Identification.dontcare_addrh.Bytes.lh;
sci_buffer[i++] = MCU_Identification.dontcare_addrh.Bytes.ll;
sci_buffer[i++] = MCU_Identification.relocated_vectors.Bytes.hl; //assign bootloader start adddress
sci_buffer[i++] = MCU_Identification.relocated_vectors.Bytes.lh;
sci_buffer[i++] = MCU_Identification.relocated_vectors.Bytes.ll;
sci_buffer[i++] = MCU_Identification.targ_core; // target is M4 core
sci_buffer[3] = i - 4; // tx data length in one frame
Boot_Send(sci_buffer);
if(enableBootMode == 1) // if in boot mode
FLASH_EraseSector((LWord)APPOK_START_ADDRESS); //erase APP_OK
WDG_Refresh();
break;
case 'E': // receive 'E' command, erase sector, then send confirm frame to UART
Boot_ReadAddress();
if(!( FLASH_EraseSector(address.complete)))
{
sci_buffer[3] = 00;
Boot_Send(sci_buffer);
}
WDG_Refresh();
break;
case'W': // receive 'W' command, extract app burning code, program flash. then send confirm frame to UART
Boot_ReadAddress();
burn_data_length = sci_buffer[8];
for(j=0,i=9;j<burn_data_length;j++,i++) // extract the prepared writing data from sci_buff[] to S19buffer[]
{
s19buffer[j] = sci_buffer[i];
}
if(!(FLASH_ProgramSectionByLongs (address.complete, (LWord*)s19buffer, burn_data_length/4)))
{
sci_buffer[3] = 00;
Boot_Send(sci_buffer);
}
WDG_Refresh();
break;
case'R': // receive 'R' command, read out the memory data, then send the data in frame to UART
Boot_ReadAddress();
burn_data_length = sci_buffer[8];
for(i=0;i<burn_data_length;i++)
{
sci_buffer[i + 4] = ((Byte*)(address.complete))[i];
}
sci_buffer[3] = burn_data_length;
Boot_Send(sci_buffer);
WDG_Refresh();
break;
case'G': // receive 'G' command, go to app.
if(enableBootMode == 1)
FLASH_ProgramSectionByLongs ((LWord)APPOK_START_ADDRESS, (LWord*)str_app_ok, APPOK_LENGTH/4);
//BOOT_LED_OFF;
NVIC_SystemReset();
break;
default :
break;
}// end switch(sci_buffer[4])
frame_start_flag = 0;
for (buff_index = 0; buff_index<FRAME_BUFF_LENGTH; buff_index++) // clear sci_buffer[]
sci_buffer[buff_index] = 0;
}// end if(data_checked == 1)
loop_counter ++;
if(loop_counter >= 10 && enableBootMode == 2) // 100 * timeout of UART_GetChar();
{
NVIC_SystemReset();
}
}// end while(enableBootMode)