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stk500boot.c
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/*****************************************************************************
Title: STK500v2 compatible bootloader
Modified for Wiring board ATMega128-16MHz
Author: Peter Fleury <[email protected]> http://jump.to/fleury
Compiler: avr-gcc 3.4.5 or 4.1 / avr-libc 1.4.3
Hardware: All AVRs with bootloader support, tested with ATmega8
License: GNU General Public License
Modified: Worapoht Kornkaewwattanakul <[email protected]> http://www.avride.com
Date: 17 October 2007
Update: 1st, 29 Dec 2007 : Enable CMD_SPI_MULTI but ignore unused command by return 0x00 byte response..
Compiler: WINAVR20060421
Description: add timeout feature like previous Wiring bootloader
DESCRIPTION:
This program allows an AVR with bootloader capabilities to
read/write its own Flash/EEprom. To enter Programming mode
an input pin is checked. If this pin is pulled low, programming mode
is entered. If not, normal execution is done from $0000
"reset" vector in Application area.
Size fits into a 1024 word bootloader section
when compiled with avr-gcc 4.1
(direct replace on Wiring Board without fuse setting changed)
USAGE:
- Set AVR MCU type and clock-frequency (F_CPU) in the Makefile.
- Set baud rate below (AVRISP only works with 115200 bps)
- compile/link the bootloader with the supplied Makefile
- program the "Boot Flash section size" (BOOTSZ fuses),
for boot-size 1024 words: program BOOTSZ01
- enable the BOOT Reset Vector (program BOOTRST)
- Upload the hex file to the AVR using any ISP programmer
- Program Boot Lock Mode 3 (program BootLock 11 and BootLock 12 lock bits) // (leave them)
- Reset your AVR while keeping PROG_PIN pulled low // (for enter bootloader by switch)
- Start AVRISP Programmer (AVRStudio/Tools/Program AVR)
- AVRISP will detect the bootloader
- Program your application FLASH file and optional EEPROM file using AVRISP
Note:
Erasing the device without flashing, through AVRISP GUI button "Erase Device"
is not implemented, due to AVRStudio limitations.
Flash is always erased before programming.
AVRdude:
Please uncomment #define REMOVE_CMD_SPI_MULTI when using AVRdude.
Comment #define REMOVE_PROGRAM_LOCK_BIT_SUPPORT to reduce code size
Read Fuse Bits and Read/Write Lock Bits is not supported
NOTES:
Based on Atmel Application Note AVR109 - Self-programming
Based on Atmel Application Note AVR068 - STK500v2 Protocol
LICENSE:
Copyright (C) 2006 Peter Fleury
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*****************************************************************************/
//************************************************************************
//* Edit History
//************************************************************************
//* Jul 7, 2010 <MLS> = Mark Sproul [email protected]
//* Jul 7, 2010 <MLS> Working on mega2560. No Auto-restart
//* Jul 7, 2010 <MLS> Switched to 8K bytes (4K words) so that we have room for the monitor
//* Jul 8, 2010 <MLS> Found older version of source that had auto restart, put that code back in
//* Jul 8, 2010 <MLS> Adding monitor code
//* Jul 11, 2010 <MLS> Added blinking LED while waiting for download to start
//* Jul 11, 2010 <MLS> Added EEPROM test
//* Jul 29, 2010 <MLS> Added recchar_timeout for timing out on bootloading
//* Aug 23, 2010 <MLS> Added support for atmega2561
//* Aug 26, 2010 <MLS> Removed support for BOOT_BY_SWITCH
//* Sep 8, 2010 <MLS> Added support for atmega16
//* Nov 9, 2010 <MLS> Issue 392:Fixed bug that 3 !!! in code would cause it to jump to monitor
//* Jun 24, 2011 <MLS> Removed analogRead (was not used)
//* Dec 29, 2011 <MLS> Issue 181: added watch dog timmer support
//* Dec 29, 2011 <MLS> Issue 505: bootloader is comparing the seqNum to 1 or the current sequence
//* Jan 1, 2012 <MLS> Issue 543: CMD_CHIP_ERASE_ISP now returns STATUS_CMD_FAILED instead of STATUS_CMD_OK
//* Jan 1, 2012 <MLS> Issue 543: Write EEPROM now does something (NOT TESTED)
//* Jan 1, 2012 <MLS> Issue 544: stk500v2 bootloader doesn't support reading fuses
//************************************************************************
//************************************************************************
//* these are used to test issues
//* http://code.google.com/p/arduino/issues/detail?id=505
//* Reported by mark.stubbs, Mar 14, 2011
//* The STK500V2 bootloader is comparing the seqNum to 1 or the current sequence
//* (IE: Requiring the sequence to be 1 or match seqNum before continuing).
//* The correct behavior is for the STK500V2 to accept the PC's sequence number, and echo it back for the reply message.
#define _FIX_ISSUE_505_
//************************************************************************
//* Issue 181: added watch dog timmer support
// #define _FIX_ISSUE_181_
#include <inttypes.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/boot.h>
#include <avr/pgmspace.h>
#include <util/delay.h>
#include <avr/eeprom.h>
#include <avr/common.h>
#include <stdlib.h>
#include "command.h"
#include "autobaud.h"
//start Josua
#define STRINGIFY(s) XSTRINGIFY(s)
#define XSTRINGIFY(s) #s
//end Josua
#if defined(_MEGA_BOARD_) || defined(_BOARD_AMBER128_) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__) \
|| defined(__AVR_ATmega2561__) || defined(__AVR_ATmega1284P__) || defined(ENABLE_MONITOR) \
|| defined(__AVR_ATmega256RFR2__)
#undef ENABLE_MONITOR
// #define ENABLE_MONITOR
static void RunMonitor(void);
#endif
#ifndef EEWE
#define EEWE 1
#endif
#ifndef EEMWE
#define EEMWE 2
#endif
//#define _DEBUG_SERIAL_ (1)
//#define _DEBUG_WITH_LEDS_ (1)
/*
* Uncomment the following lines to save code space
*/
#define REMOVE_PROGRAM_LOCK_BIT_SUPPORT // disable program lock bits
//#define REMOVE_BOOTLOADER_LED // no LED to show active bootloader
//#define REMOVE_CMD_SPI_MULTI // disable processing of SPI_MULTI commands, Remark this line for AVRDUDE <Worapoht>
//
//************************************************************************
//* LED on pin "PROGLED_PIN" on port "PROGLED_PORT"
//* indicates that bootloader is active
//* PG2 -> LED on Wiring board
//************************************************************************
#define BLINK_LED_WHILE_WAITING
#ifdef _MEGA_BOARD_
#define PROGLED_PORT PORTB
#define PROGLED_DDR DDRB
#define PROGLED_PIN PINB7
#elif defined( _BOARD_AMBER128_ )
//* this is for the amber 128 http://www.soc-robotics.com/
//* onbarod led is PORTE4
#define PROGLED_PORT PORTD
#define PROGLED_DDR DDRD
#define PROGLED_PIN PINE7
#elif defined( _CEREBOTPLUS_BOARD_ ) || defined(_CEREBOT_II_BOARD_)
//* this is for the Cerebot 2560 board and the Cerebot-ii
//* onbarod leds are on PORTE4-7
#define PROGLED_PORT PORTE
#define PROGLED_DDR DDRE
#define PROGLED_PIN PINE7
#elif defined( _PENGUINO_ )
//* this is for the Penguino
//* onbarod led is PORTE4
#define PROGLED_PORT PORTC
#define PROGLED_DDR DDRC
#define PROGLED_PIN PINC6
#elif defined( _ANDROID_2561_ ) || defined( __AVR_ATmega2561__ )
//* this is for the Boston Android 2561
//* onbarod led is PORTE4
#define PROGLED_PORT PORTA
#define PROGLED_DDR DDRA
#define PROGLED_PIN PINA3
#elif defined( _BOARD_MEGA16 )
//* onbarod led is PORTA7
#define PROGLED_PORT PORTA
#define PROGLED_DDR DDRA
#define PROGLED_PIN PINA7
#define UART_BAUDRATE_DOUBLE_SPEED 0
#elif defined( _BOARD_BAHBOT_ )
//* dosent have an onboard LED but this is what will probably be added to this port
#define PROGLED_PORT PORTB
#define PROGLED_DDR DDRB
#define PROGLED_PIN PINB0
#elif defined( _BOARD_ROBOTX_ )
#define PROGLED_PORT PORTB
#define PROGLED_DDR DDRB
#define PROGLED_PIN PINB6
#elif defined( _BOARD_CUSTOM1284_BLINK_B0_ )
#define PROGLED_PORT PORTB
#define PROGLED_DDR DDRB
#define PROGLED_PIN PINB0
#elif defined( _BOARD_CUSTOM1284_ )
#define PROGLED_PORT PORTD
#define PROGLED_DDR DDRD
#define PROGLED_PIN PIND5
#elif defined( _AVRLIP_ )
#define PROGLED_PORT PORTB
#define PROGLED_DDR DDRB
#define PROGLED_PIN PINB5
#elif defined( _BOARD_STK500_ )
#define PROGLED_PORT PORTA
#define PROGLED_DDR DDRA
#define PROGLED_PIN PINA7
#elif defined( _BOARD_STK502_ )
#define PROGLED_PORT PORTB
#define PROGLED_DDR DDRB
#define PROGLED_PIN PINB5
#elif defined( _BOARD_STK525_ )
#define PROGLED_PORT PORTB
#define PROGLED_DDR DDRB
#define PROGLED_PIN PINB7
#elif defined(_MEGA_BOARD_JIMINY )
#define PROGLED_PORT PORTB
#define PROGLED_DDR DDRB
#define PROGLED_RED PINB5
#define PROGLED_GREEN PINB6
#define PROGLED_PIN PINB4
#define UART_BAUDRATE_DOUBLE_SPEED 1
#define _FIX_ISSUE_181_
#pragma message "Used Board = MEGA_BOARD_JIMINY"
#else
#define PROGLED_PORT PORTG
#define PROGLED_DDR DDRG
#define PROGLED_PIN PING2
#endif
/*
* define CPU frequency in Mhz here if not defined in Makefile
*/
#ifndef F_CPU
#define F_CPU 16000000UL
#endif
#define _BLINK_LOOP_COUNT_ (F_CPU / 2250)
/*
* UART Baudrate, AVRStudio AVRISP only accepts 115200 bps
*/
#ifndef BAUDRATE
#define BAUDRATE 115200
#endif
/*
* Enable (1) or disable (0) USART double speed operation
*/
#ifndef UART_BAUDRATE_DOUBLE_SPEED
#if defined (__AVR_ATmega32__)
#define UART_BAUDRATE_DOUBLE_SPEED 0
#else
#define UART_BAUDRATE_DOUBLE_SPEED 1
#endif
#endif
/*
* HW and SW version, reported to AVRISP, must match version of AVRStudio
*/
#define CONFIG_PARAM_BUILD_NUMBER_LOW 0
#define CONFIG_PARAM_BUILD_NUMBER_HIGH 0
#define CONFIG_PARAM_HW_VER 0x0F
#define CONFIG_PARAM_SW_MAJOR 2
#define CONFIG_PARAM_SW_MINOR 0x0A
/*
* Calculate the address where the bootloader starts from FLASHEND and BOOTSIZE
* (adjust BOOTSIZE below and BOOTLOADER_ADDRESS in Makefile if you want to change the size of the bootloader)
*/
//start Josua
#ifndef BOOTSIZE
// #define BOOTSIZE 1024
#if FLASHEND > 0x0F000
#define BOOTSIZE 8192
#else
#define BOOTSIZE 2048
#endif
#endif
#define APP_END (FLASHEND -(2*BOOTSIZE) + 1)
#pragma message "FLASHEND=" STRINGIFY(FLASHEND)
#pragma message "BOOTSIZE=" STRINGIFY(BOOTSIZE)
#pragma message "APP_END=" STRINGIFY(APP_END)
// END Josua
/*
* Signature bytes are not available in avr-gcc io_xxx.h
*/
#if defined (__AVR_ATmega8__)
#define SIGNATURE_BYTES 0x1E9307
#elif defined (__AVR_ATmega16__)
#define SIGNATURE_BYTES 0x1E9403
#elif defined (__AVR_ATmega32__)
#define SIGNATURE_BYTES 0x1E9502
#elif defined (__AVR_ATmega8515__)
#define SIGNATURE_BYTES 0x1E9306
#elif defined (__AVR_ATmega8535__)
#define SIGNATURE_BYTES 0x1E9308
#elif defined (__AVR_ATmega162__)
#define SIGNATURE_BYTES 0x1E9404
#elif defined (__AVR_ATmega128__)
#define SIGNATURE_BYTES 0x1E9702
#elif defined (__AVR_ATmega1280__)
#define SIGNATURE_BYTES 0x1E9703
#elif defined (__AVR_ATmega2560__)
#define SIGNATURE_BYTES 0x1E9801
#elif defined (__AVR_ATmega2561__)
#define SIGNATURE_BYTES 0x1e9802
#elif defined (__AVR_ATmega1284P__)
#define SIGNATURE_BYTES 0x1e9705
#elif defined (__AVR_ATmega640__)
#define SIGNATURE_BYTES 0x1e9608
#elif defined (__AVR_ATmega64__)
#define SIGNATURE_BYTES 0x1E9602
#elif defined (__AVR_ATmega169__)
#define SIGNATURE_BYTES 0x1e9405
#elif defined (__AVR_AT90USB1287__)
#define SIGNATURE_BYTES 0x1e9782
#elif defined (__AVR_ATmega256RFR2__)
#define SIGNATURE_BYTES 0x1ea802
//#elif defined (__AVR_ATmega128RFR2__)
// #define SIGNATURE_BYTES 0x1ea702
//#elif defined (__AVR_ATmega64RFR2__)
// #define SIGNATURE_BYTES 0x1ea602
#else
#error "no signature definition for MCU available"
#endif
#if defined(_BOARD_ROBOTX_) || defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB1286__)
#define UART_BAUD_RATE_LOW UBRR1L
#define UART_STATUS_REG UCSR1A
#define UART_CONTROL_REG UCSR1B
#define UART_ENABLE_TRANSMITTER TXEN1
#define UART_ENABLE_RECEIVER RXEN1
#define UART_TRANSMIT_COMPLETE TXC1
#define UART_RECEIVE_COMPLETE RXC1
#define UART_DATA_REG UDR1
#define UART_DOUBLE_SPEED U2X1
#elif defined(__AVR_ATmega8__) || defined(__AVR_ATmega16__) || defined(__AVR_ATmega32__) \
|| defined(__AVR_ATmega8515__) || defined(__AVR_ATmega8535__)
/* ATMega8 with one USART */
#define UART_BAUD_RATE_LOW UBRRL
#define UART_STATUS_REG UCSRA
#define UART_CONTROL_REG UCSRB
#define UART_ENABLE_TRANSMITTER TXEN
#define UART_ENABLE_RECEIVER RXEN
#define UART_TRANSMIT_COMPLETE TXC
#define UART_RECEIVE_COMPLETE RXC
#define UART_DATA_REG UDR
#define UART_DOUBLE_SPEED U2X
#elif defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__) || defined(__AVR_ATmega162__) \
|| defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__) || defined(__AVR_ATmega2561__)\
|| defined (__AVR_ATmega256RFR2__)
/* ATMega with two USART, use UART0 */
#define UART_BAUD_RATE_LOW UBRR0L
#define UART_STATUS_REG UCSR0A
#define UART_CONTROL_REG UCSR0B
#define UART_ENABLE_TRANSMITTER TXEN0
#define UART_ENABLE_RECEIVER RXEN0
#define UART_TRANSMIT_COMPLETE TXC0
#define UART_RECEIVE_COMPLETE RXC0
#define UART_DATA_REG UDR0
#define UART_DOUBLE_SPEED U2X0
#elif defined(UBRR0L) && defined(UCSR0A) && defined(TXEN0)
/* ATMega with two USART, use UART0 */
#define UART_BAUD_RATE_LOW UBRR0L
#define UART_STATUS_REG UCSR0A
#define UART_CONTROL_REG UCSR0B
#define UART_ENABLE_TRANSMITTER TXEN0
#define UART_ENABLE_RECEIVER RXEN0
#define UART_TRANSMIT_COMPLETE TXC0
#define UART_RECEIVE_COMPLETE RXC0
#define UART_DATA_REG UDR0
#define UART_DOUBLE_SPEED U2X0
#elif defined(UBRRL) && defined(UCSRA) && defined(UCSRB) && defined(TXEN) && defined(RXEN)
//* catch all
#define UART_BAUD_RATE_LOW UBRRL
#define UART_STATUS_REG UCSRA
#define UART_CONTROL_REG UCSRB
#define UART_ENABLE_TRANSMITTER TXEN
#define UART_ENABLE_RECEIVER RXEN
#define UART_TRANSMIT_COMPLETE TXC
#define UART_RECEIVE_COMPLETE RXC
#define UART_DATA_REG UDR
#define UART_DOUBLE_SPEED U2X
#else
#error "no UART definition for MCU available"
#endif
/*
* Macro to calculate UBBR from XTAL and baudrate
*/
// Josua entfernen der 0.5
#if defined(__AVR_ATmega32__) && UART_BAUDRATE_DOUBLE_SPEED
#define UART_BAUD_SELECT(baudRate,xtalCpu) ((xtalCpu / 4 / baudRate - 1) / 2)
#elif defined(__AVR_ATmega32__)
#define UART_BAUD_SELECT(baudRate,xtalCpu) ((xtalCpu / 8 / baudRate - 1) / 2)
#elif UART_BAUDRATE_DOUBLE_SPEED
#define UART_BAUD_SELECT(baudRate,xtalCpu) (((float)(xtalCpu))/(((float)(baudRate))*8.0)-1.0 +0.5) // Josua remove +0.5?
#else
#define UART_BAUD_SELECT(baudRate,xtalCpu) (((float)(xtalCpu))/(((float)(baudRate))*16.0)-1.0 +0.5) // Josua remove +0.5?
#endif
/*
* States used in the receive state machine
*/
#define ST_START 0
#define ST_GET_SEQ_NUM 1
#define ST_MSG_SIZE_1 2
#define ST_MSG_SIZE_2 3
#define ST_GET_TOKEN 4
#define ST_GET_DATA 5
#define ST_GET_CHECK 6
#define ST_PROCESS 7
/*
* use 16bit address variable for ATmegas with <= 64K flash
*/
#if defined(RAMPZ)
typedef uint32_t address_t;
#else
typedef uint16_t address_t;
#endif
/*
* function prototypes
*/
static void sendchar(char c);
static unsigned char recchar(void);
/*
* since this bootloader is not linked against the avr-gcc crt1 functions,
* to reduce the code size, we need to provide our own initialization
*/
void __jumpMain (void) __attribute__ ((naked)) __attribute__ ((section (".init9")));
#include <avr/sfr_defs.h>
//#define SPH_REG 0x3E
//#define SPL_REG 0x3D
//*****************************************************************************
void __jumpMain(void)
{
//* July 17, 2010 <MLS> Added stack pointer initialzation
//* the first line did not do the job on the ATmega128
asm volatile ( ".set __stack, %0" :: "i" (RAMEND) );
//* set stack pointer to top of RAM
asm volatile ( "ldi 16, %0" :: "i" (RAMEND >> 8) );
asm volatile ( "out %0,16" :: "i" (AVR_STACK_POINTER_HI_ADDR) );
asm volatile ( "ldi 16, %0" :: "i" (RAMEND & 0x0ff) );
asm volatile ( "out %0,16" :: "i" (AVR_STACK_POINTER_LO_ADDR) );
asm volatile ( "clr __zero_reg__" ); // GCC depends on register r1 set to 0
asm volatile ( "out %0, __zero_reg__" :: "I" (_SFR_IO_ADDR(SREG)) ); // set SREG to 0
asm volatile ( "jmp main"); // jump to main()
}
//*****************************************************************************
void delay_ms(unsigned int timedelay)
{
unsigned int i;
for (i=0;i<timedelay;i++)
{
_delay_ms(0.5);
}
}
//*****************************************************************************
/*
* send single byte to USART, wait until transmission is completed
*/
static void sendchar(char c)
{
UART_DATA_REG = c; // prepare transmission
while (!(UART_STATUS_REG & (1 << UART_TRANSMIT_COMPLETE))); // wait until byte sent
UART_STATUS_REG |= (1 << UART_TRANSMIT_COMPLETE); // delete TXCflag
}
//************************************************************************
static int Serial_Available(void)
{
return(UART_STATUS_REG & (1 << UART_RECEIVE_COMPLETE)); // wait for data
}
//*****************************************************************************
/*
* Read single byte from USART, block if no data available
*/
static unsigned char recchar(void)
{
while (!(UART_STATUS_REG & (1 << UART_RECEIVE_COMPLETE)))
{
// wait for data
}
return UART_DATA_REG;
}
// Josua change to more
#define MAX_TIME_COUNT (F_CPU ) //>> 1)
//*****************************************************************************
static unsigned char recchar_timeout(void)
{
uint32_t count = 0;
while (!(UART_STATUS_REG & (1 << UART_RECEIVE_COMPLETE)))
{
// wait for data
count++;
if (count > MAX_TIME_COUNT)
{
unsigned int data;
#if (FLASHEND > 0x10000)
data = pgm_read_word_far(0); //* get the first word of the user program
#else
data = pgm_read_word_near(0); //* get the first word of the user program
#endif
if (data != 0xffff) //* make sure its valid before jumping to it.
{
asm volatile(
"clr r30 \n\t"
"clr r31 \n\t"
"ijmp \n\t"
);
}
count = 0;
}
}
return UART_DATA_REG;
}
#if defined(__AVR_ATmega256RFR2__)
// Josua pass mcusr to application for reset cause handling in section(".init0")
// save the reset flags in the designated register
// This can be saved in a main program by putting code in .init0 (which
// executes before normal c init code) to save R2 to a global variable.
/* Use this to restore mcusr in application
uint8_t mcusr_mirror __attribute__ ((section (".noinit")));
void get_mcusr(void)\
__attribute__((naked))\
__attribute__((section(".init0")));
void get_mcusr(void)
{
// save the reset flags passed from the bootloader
__asm__ __volatile__ ("mov %0, r2\n" : "=r" (mcusr_mirror) :);
}
*/
void app_start(uint8_t mcusr) __attribute__ ((naked));
void app_start(uint8_t mcusr) {
// save mcusr for app
__asm__ __volatile__ ("mov r2, %0\n" :: "r" (mcusr));
// Jump to RST vector
__asm__ __volatile__ ("jmp 0000");
/* __asm__ __volatile__ (
"clr r30\n"
"clr r31\n"
"ijmp\n"
);
*/
}
#else
//* for watch dog timer startup
void (*app_start)(uint8_t mcusr) = 0x0000;
#endif
#if defined(_MEGA_BOARD_JIMINY )
#define ASYNC_TIMER AS2
#define NO_PRESCALING CS20
#define ASYNC_TIMER_CONTROL_REGISTER TCCR2B
#define ASYNC_TIMER_CONTROL_UPDATE_BUSY TCR2AUB
#define OUTPUT_COMPARE_UPDATE_BUSY OCR2AUB
#define TIMER_UPDATE_BUSY TCN2UB
#define TIMER TCNT2
#define OSCCAL_RESOLUTION 8
#define LOOP_CYCLES 7
#define XTAL_FREQUENCY 32768U
#define EXTERNAL_TICKS 50U
#endif
/* Add calibration functions */
static inline unsigned int Counter(void){
unsigned int cnt;
cnt = 0; // Reset counter
TIMER = 0x00; // Reset async timer/counter
while (ASSR & ((1<<OUTPUT_COMPARE_UPDATE_BUSY)|(1<<TIMER_UPDATE_BUSY)|(1<<ASYNC_TIMER_CONTROL_UPDATE_BUSY))); // Wait until async timer is updated (Async Status reg. busy flags).
do{ // cnt++: Increment counter - the add immediate to word (ADIW) takes 2 cycles of code.
cnt++; // Devices with async TCNT in I/0 space use 1 cycle reading, 2 for devices with async TCNT in extended I/O space
} while (TIMER < EXTERNAL_TICKS); // CPI takes 1 cycle, BRCS takes 2 cycles, resulting in: 2+1(or 2)+1+2=6(or 7) CPU cycles
return cnt; // NB! Different compilers may give different CPU cycles!
}
static inline void CalibrateInternalRc(void){
uint16_t countVal = ((EXTERNAL_TICKS*(uint32_t)16000000)/(((uint32_t)XTAL_FREQUENCY)*LOOP_CYCLES));
ASSR |= (1<<ASYNC_TIMER); \
ASYNC_TIMER_CONTROL_REGISTER = (1<<NO_PRESCALING);
TIMER = 0;
while (ASSR & ((1<<OUTPUT_COMPARE_UPDATE_BUSY)|(1<<TIMER_UPDATE_BUSY)|(1<<ASYNC_TIMER_CONTROL_UPDATE_BUSY)));
unsigned int count = 0;
unsigned char cycles = 0x80;
uint8_t prev_osccal[2] = {0,0};
for(;cycles > 0; cycles--)
{
prev_osccal[1] = prev_osccal[0];
prev_osccal[0] = OSCCAL;
//printf("OSCCAL %x \n", OSCCAL);
count = Counter();
if(cycles < 0x80-5) {
//printf("count %u \n", count);
if(count > countVal){
OSCCAL--;
//NOP();
}else if(count < countVal){
OSCCAL++;
//NOP();
}else{
cycles = 1;
}
//printf("OSCCAL %x prev0 %x prev1 %x \n", OSCCAL, prev_osccal[0], prev_osccal[1]);
if(OSCCAL == prev_osccal[1]) {
cycles = 1;
}
}
}
}
/* Add Autobaud functions*/
static volatile uint8_t count=0;
static inline uint8_t get_ubrr(uint16_t ticks)
{
if(ticks > 800){
return (ticks)/(16*10UL)-1; //(ticks*0.9)/(16*9)-1
}
if(ticks > 500){
return 3;
}
else{
return 1;
}
}
ISR(PCINT1_vect)
{
if(count >=6){
TCCR5B &= ~(1<<CS50);
}else if(count == 0)
{
TCCR5B |= (1<<CS50); //start clock
}
count++;
}
/*Add exit function*/
static void exit_bootloader(void)
{
boot_rww_enable(); // enable application section
DDRB |= (1<<PB6);
PORTB &= ~(1<<PB6);
_delay_ms(200);
#if defined(__AVR_ATmega256RFR2__) || defined(__AVR_ATmega2564RFR2__)
EIND = 0;
#endif
MCUCR = (1<<IVCE);
MCUCR = 0x00;
DDRE = 0;
DDRB = 0;
PORTB =0;
asm("jmp 0000");
}
//*****************************************************************************
int main(void)
{
DDRG |= (1<<PG0)|(1<<PG2);
PORTG |= (1<<PG0)|(1<<PG2);
/* enable extended addressing */
/* Some MCU with more than 128KB flash start writing in the middle of the flash
* the EIND has to be set to get them start at the beginning.
*/
#if defined(__AVR_ATmega256RFR2__) || defined(__AVR_ATmega2564RFR2__)
EIND = 1;
#endif
#ifdef _FIX_ISSUE_181_
//************************************************************************
//* Dec 29, 2011 <MLS> Issue #181, added watch dog timmer support
//* handle the watch dog timer
uint8_t mcuStatusReg;
mcuStatusReg = MCUSR;
__asm__ __volatile__ ("cli");
__asm__ __volatile__ ("wdr");
MCUSR = 0;
WDTCSR |= _BV(WDCE) | _BV(WDE);
WDTCSR = 0;
__asm__ __volatile__ ("sei");
// check if WDT generated the reset, if so, go straight to app
if (mcuStatusReg & _BV(WDRF))
{
app_start(mcuStatusReg);
}
//************************************************************************
#endif
/* START Josua */
/* Set calibration value for internal RC oscillator*/
/* autocaliber with the two oscillators */
CLKPR = (1<<CLKPCE);
CLKPR = 0x0f;
CalibrateInternalRc();
uint16_t timer_ticks = 0;
DDRE &= ~(1<<PE0)|(1<<PE1);
//pullups
PORTE |= (1<<PE0)|(1<<PE1);
//DDRB |= (1<<PB4);
//PORTB | (1<<PB4)|(1<<PB5)|(1<<PB6);
TIMER_CONFIG_A = 0;
TIMER_CONFIG_B = 0;
TIMER_CONFIG_C = 0;
TIMER_COUNT = 0;
MCUCR = (1<<IVCE);
MCUCR = 0x02;
PCICR |= (1<<PCIE1);
PCMSK1 |= (1<<PCINT8);
uint32_t wait = 0xfffff;
sei();
while(count <=6 && --wait);
PCICR &= ~(1<<PCIE1);
PORTE &= ~(1<<PE0)|(1<<PE1);
CLKPR = (1<<CLKPCE);
CLKPR = 0x00;
if(count <=6){
exit_bootloader();
}
timer_ticks = TCNT5;
/* PROG_PIN pulled low, indicate with LED that bootloader is active */
PROGLED_DDR |= (1<<PROGLED_PIN);
PROGLED_PORT &= ~(1<<PROGLED_PIN); // active low LED ON
// PROGLED_PORT |= (1<<PROGLED_PIN); // active high LED ON
/* END Josua */
address_t address = 0;
address_t eraseAddress = 0;
unsigned char msgParseState;
unsigned int ii = 0;
unsigned char checksum = 0;
unsigned char seqNum = 0;
unsigned int msgLength = 0;
unsigned char msgBuffer[285];
unsigned char c, *p;
unsigned char isLeave = 0;
unsigned long boot_timeout;
unsigned long boot_timer;
unsigned int boot_state;
#ifdef ENABLE_MONITOR
unsigned int exPointCntr = 0;
unsigned int rcvdCharCntr = 0;
#endif
//* some chips dont set the stack properly
asm volatile ( ".set __stack, %0" :: "i" (RAMEND) );
asm volatile ( "ldi 16, %0" :: "i" (RAMEND >> 8) );
asm volatile ( "out %0,16" :: "i" (AVR_STACK_POINTER_HI_ADDR) );
asm volatile ( "ldi 16, %0" :: "i" (RAMEND & 0x0ff) );
asm volatile ( "out %0,16" :: "i" (AVR_STACK_POINTER_LO_ADDR) );
boot_timer = 0;
boot_state = 0;
#ifdef BLINK_LED_WHILE_WAITING
// boot_timeout = 90000; //* should be about 4 seconds
// boot_timeout = 170000;
boot_timeout = 20000; //* should be about 1 second
#else
boot_timeout = 3500000; // 7 seconds , approx 2us per step when optimize "s"
#endif
/*
* Branch to bootloader or application code ?
*/
#ifndef REMOVE_BOOTLOADER_LED
/* PROG_PIN pulled low, indicate with LED that bootloader is active */
PROGLED_DDR |= (1<<PROGLED_PIN);
//PROGLED_PORT &= ~(1<<PROGLED_PIN); // active low LED ON
PROGLED_PORT |= (1<<PROGLED_PIN); // active high LED ON
#ifdef _DEBUG_WITH_LEDS_
for (ii=0; ii<3; ii++)
{
PROGLED_PORT &= ~(1<<PROGLED_PIN); // turn LED off
delay_ms(100);
PROGLED_PORT |= (1<<PROGLED_PIN); // turn LED on
delay_ms(100);
}
#endif
#endif
/*
* Init UART
* set baudrate and enable USART receiver and transmiter without interrupts
*/
#if UART_BAUDRATE_DOUBLE_SPEED
UART_STATUS_REG |= (1 <<UART_DOUBLE_SPEED);
#endif
//UART_BAUD_RATE_LOW = UART_BAUD_SELECT(BAUDRATE,F_CPU);
UBRR0H = 0;
UART_BAUD_RATE_LOW = get_ubrr(timer_ticks);
UART_CONTROL_REG = (1 << UART_ENABLE_RECEIVER) | (1 << UART_ENABLE_TRANSMITTER);
asm volatile ("nop"); // wait until port has changed
#ifdef _DEBUG_SERIAL_
// delay_ms(500);
sendchar('#');
sendchar(get_ubrr(timer_ticks));
sendchar(timer_ticks>>8);
sendchar(timer_ticks);
sendchar(count);
sendchar('#');
sendchar('s');
sendchar('t');
sendchar('k');
// sendchar('5');
// sendchar('0');
// sendchar('0');
sendchar('v');
sendchar('2');
sendchar(0x0d);
sendchar(0x0a);
delay_ms(100);
#endif
/* while (boot_state==0)
{
while ((!(Serial_Available())) && (boot_state == 0)) // wait for data
{
_delay_ms(0.001);
boot_timer++;
if (boot_timer > boot_timeout)
{
boot_state = 1; // (after ++ -> boot_state=2 bootloader timeout, jump to main 0x00000 )
}
#ifdef BLINK_LED_WHILE_WAITING
if ((boot_timer % _BLINK_LOOP_COUNT_) == 0)
{
//* toggle the LED
PROGLED_PORT ^= (1<<PROGLED_PIN); // turn LED ON
}
#endif
}
boot_state++; // ( if boot_state=1 bootloader received byte from UART, enter bootloader mode)
}*/
boot_state =1;
uint8_t first_run = 1;
if (boot_state==1)
{
//* main loop
while (!isLeave)
{
/*
* Collect received bytes to a complete message
*/
msgParseState = ST_START;
while ( msgParseState != ST_PROCESS )
{
if (boot_state==1)
{
boot_state = 0;
c = UART_DATA_REG;
}
else
{
// c = recchar();
c = recchar_timeout();
}
uint8_t temp = c;
if(first_run){
while(temp != 0x14&&first_run) {
temp = recchar();
}
msgParseState = ST_PROCESS;
}
#ifdef ENABLE_MONITOR
rcvdCharCntr++;
if ((c == '!') && (rcvdCharCntr < 10))
{
exPointCntr++;
if (exPointCntr == 3)
{
RunMonitor();
exPointCntr = 0; // reset back to zero so we dont get in an endless loop
isLeave = 1;
msgParseState = 99; //* we dont want it do anything
break;
}
}
else
{
exPointCntr = 0;
}
#endif
switch (msgParseState)
{
case ST_START:
if ( c == MESSAGE_START )
{
msgParseState = ST_GET_SEQ_NUM;
checksum = MESSAGE_START^0;
}
break;
case ST_GET_SEQ_NUM:
#ifdef _FIX_ISSUE_505_
seqNum = c;
msgParseState = ST_MSG_SIZE_1;
checksum ^= c;
#else
if ( (c == 1) || (c == seqNum) )
{
seqNum = c;
msgParseState = ST_MSG_SIZE_1;
checksum ^= c;
}
else
{
msgParseState = ST_START;
}
#endif
break;