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Diffstat (limited to 'bootloaders/atmega8/ATmegaBOOT.c')
| -rw-r--r-- | bootloaders/atmega8/ATmegaBOOT.c | 507 |
1 files changed, 0 insertions, 507 deletions
diff --git a/bootloaders/atmega8/ATmegaBOOT.c b/bootloaders/atmega8/ATmegaBOOT.c deleted file mode 100644 index 8c8d22a..0000000 --- a/bootloaders/atmega8/ATmegaBOOT.c +++ /dev/null @@ -1,507 +0,0 @@ -/**********************************************************/ -/* Serial Bootloader for Atmel mega8 AVR Controller */ -/* */ -/* ATmegaBOOT.c */ -/* */ -/* Copyright (c) 2003, Jason P. Kyle */ -/* */ -/* Hacked by DojoCorp - ZGZ - MMX - IVR */ -/* Hacked by David A. Mellis */ -/* */ -/* 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 */ -/* (at your option) 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. */ -/* */ -/* You should have received a copy of the GNU General */ -/* Public License along with this program; if not, write */ -/* to the Free Software Foundation, Inc., */ -/* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ -/* */ -/* Licence can be viewed at */ -/* http://www.fsf.org/licenses/gpl.txt */ -/* */ -/* Target = Atmel AVR m8 */ -/**********************************************************/ - -#include <inttypes.h> -#include <avr/io.h> -#include <avr/pgmspace.h> -#include <avr/eeprom.h> -#include <avr/interrupt.h> -#include <util/delay.h> - -//#define F_CPU 16000000 - -/* We, Malmoitians, like slow interaction - * therefore the slow baud rate ;-) - */ -//#define BAUD_RATE 9600 - -/* 6.000.000 is more or less 8 seconds at the - * speed configured here - */ -//#define MAX_TIME_COUNT 6000000 -#define MAX_TIME_COUNT (F_CPU>>1) -///#define MAX_TIME_COUNT_MORATORY 1600000 - -/* SW_MAJOR and MINOR needs to be updated from time to time to avoid warning message from AVR Studio */ -#define HW_VER 0x02 -#define SW_MAJOR 0x01 -#define SW_MINOR 0x12 - -// AVR-GCC compiler compatibility -// avr-gcc compiler v3.1.x and older doesn't support outb() and inb() -// if necessary, convert outb and inb to outp and inp -#ifndef outb - #define outb(sfr,val) (_SFR_BYTE(sfr) = (val)) -#endif -#ifndef inb - #define inb(sfr) _SFR_BYTE(sfr) -#endif - -/* defines for future compatibility */ -#ifndef cbi - #define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit)) -#endif -#ifndef sbi - #define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit)) -#endif - -/* Adjust to suit whatever pin your hardware uses to enter the bootloader */ -#define eeprom_rb(addr) eeprom_read_byte ((uint8_t *)(addr)) -#define eeprom_rw(addr) eeprom_read_word ((uint16_t *)(addr)) -#define eeprom_wb(addr, val) eeprom_write_byte ((uint8_t *)(addr), (uint8_t)(val)) - -/* Onboard LED is connected to pin PB5 */ -#define LED_DDR DDRB -#define LED_PORT PORTB -#define LED_PIN PINB -#define LED PINB5 - - -#define SIG1 0x1E // Yep, Atmel is the only manufacturer of AVR micros. Single source :( -#define SIG2 0x93 -#define SIG3 0x07 -#define PAGE_SIZE 0x20U //32 words - - -void putch(char); -char getch(void); -void getNch(uint8_t); -void byte_response(uint8_t); -void nothing_response(void); - -union address_union { - uint16_t word; - uint8_t byte[2]; -} address; - -union length_union { - uint16_t word; - uint8_t byte[2]; -} length; - -struct flags_struct { - unsigned eeprom : 1; - unsigned rampz : 1; -} flags; - -uint8_t buff[256]; -//uint8_t address_high; - -uint8_t pagesz=0x80; - -uint8_t i; -//uint8_t bootuart0=0,bootuart1=0; - - -void (*app_start)(void) = 0x0000; - -int main(void) -{ - uint8_t ch,ch2; - uint16_t w; - - //cbi(BL_DDR,BL); - //sbi(BL_PORT,BL); - - asm volatile("nop\n\t"); - - /* check if flash is programmed already, if not start bootloader anyway */ - //if(pgm_read_byte_near(0x0000) != 0xFF) { - - /* check if bootloader pin is set low */ - //if(bit_is_set(BL_PIN,BL)) app_start(); - //} - - /* initialize UART(s) depending on CPU defined */ - /* m8 */ - UBRRH = (((F_CPU/BAUD_RATE)/16)-1)>>8; // set baud rate - UBRRL = (((F_CPU/BAUD_RATE)/16)-1); - UCSRB = (1<<RXEN)|(1<<TXEN); // enable Rx & Tx - UCSRC = (1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0); // config USART; 8N1 - - //UBRRL = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1); - //UBRRH = (F_CPU/(BAUD_RATE*16L)-1) >> 8; - //UCSRA = 0x00; - //UCSRC = 0x86; - //UCSRB = _BV(TXEN)|_BV(RXEN); - - - /* this was giving uisp problems, so I removed it; without it, the boot - works on with uisp and avrdude on the mac (at least). */ - //putch('\0'); - - //uint32_t l; - //uint32_t time_count; - //time_count=0; - - /* set LED pin as output */ - sbi(LED_DDR,LED); - for (i = 0; i < 16; i++) { - outb(LED_PORT, inb(LED_PORT) ^ _BV(LED)); - _delay_loop_2(0); - } - - //for (l=0; l<40000000; l++) - //outb(LED_PORT, inb(LED_PORT) ^= _BV(LED)); - - /* flash onboard LED three times to signal entering of bootloader */ - //for(i=0; i<3; ++i) { - //for(l=0; l<40000000; ++l); - //sbi(LED_PORT,LED); - //for(l=0; l<40000000; ++l); - //cbi(LED_PORT,LED); - //} - - /* see comment at previous call to putch() */ - //putch('\0'); // this line is needed for the synchronization of the programmer - - /* forever */ - for (;;) { - //if((inb(UCSRA) & _BV(RXC))){ - /* get character from UART */ - ch = getch(); - - /* A bunch of if...else if... gives smaller code than switch...case ! */ - - /* Hello is anyone home ? */ - if(ch=='0') { - nothing_response(); - } - - /* Request programmer ID */ - /* Not using PROGMEM string due to boot block in m128 being beyond 64kB boundry */ - /* Would need to selectively manipulate RAMPZ, and it's only 9 characters anyway so who cares. */ - else if(ch=='1') { - if (getch() == ' ') { - putch(0x14); - putch('A'); - putch('V'); - putch('R'); - putch(' '); - putch('I'); - putch('S'); - putch('P'); - putch(0x10); - } - } - - /* AVR ISP/STK500 board commands DON'T CARE so default nothing_response */ - else if(ch=='@') { - ch2 = getch(); - if (ch2>0x85) getch(); - nothing_response(); - } - - /* AVR ISP/STK500 board requests */ - else if(ch=='A') { - ch2 = getch(); - if(ch2==0x80) byte_response(HW_VER); // Hardware version - else if(ch2==0x81) byte_response(SW_MAJOR); // Software major version - else if(ch2==0x82) byte_response(SW_MINOR); // Software minor version - //else if(ch2==0x98) byte_response(0x03); // Unknown but seems to be required by avr studio 3.56 - else byte_response(0x00); // Covers various unnecessary responses we don't care about - } - - /* Device Parameters DON'T CARE, DEVICE IS FIXED */ - else if(ch=='B') { - getNch(20); - nothing_response(); - } - - /* Parallel programming stuff DON'T CARE */ - else if(ch=='E') { - getNch(5); - nothing_response(); - } - - /* Enter programming mode */ - else if(ch=='P') { - nothing_response(); - // FIXME: modified only here by DojoCorp, Mumbai, India, 20050626 - //time_count=0; // exted the delay once entered prog.mode - } - - /* Leave programming mode */ - else if(ch=='Q') { - nothing_response(); - //time_count=MAX_TIME_COUNT_MORATORY; // once the programming is done, - // we should start the application - // but uisp has problems with this, - // therefore we just change the times - // and give the programmer 1 sec to react - } - - /* Erase device, don't care as we will erase one page at a time anyway. */ - else if(ch=='R') { - nothing_response(); - } - - /* Set address, little endian. EEPROM in bytes, FLASH in words */ - /* Perhaps extra address bytes may be added in future to support > 128kB FLASH. */ - /* This might explain why little endian was used here, big endian used everywhere else. */ - else if(ch=='U') { - address.byte[0] = getch(); - address.byte[1] = getch(); - nothing_response(); - } - - /* Universal SPI programming command, disabled. Would be used for fuses and lock bits. */ - else if(ch=='V') { - getNch(4); - byte_response(0x00); - } - - /* Write memory, length is big endian and is in bytes */ - else if(ch=='d') { - length.byte[1] = getch(); - length.byte[0] = getch(); - flags.eeprom = 0; - if (getch() == 'E') flags.eeprom = 1; - for (w=0;w<length.word;w++) { - buff[w] = getch(); // Store data in buffer, can't keep up with serial data stream whilst programming pages - } - if (getch() == ' ') { - if (flags.eeprom) { //Write to EEPROM one byte at a time - for(w=0;w<length.word;w++) { - eeprom_wb(address.word,buff[w]); - address.word++; - } - } else { //Write to FLASH one page at a time - //if (address.byte[1]>127) address_high = 0x01; //Only possible with m128, m256 will need 3rd address byte. FIXME - //else address_high = 0x00; - - //address.word = address.word << 1; //address * 2 -> byte location - //if ((length.byte[0] & 0x01)) length.word++; //Even up an odd number of bytes - cli(); //Disable interrupts, just to be sure - while(bit_is_set(EECR,EEWE)); //Wait for previous EEPROM writes to complete - asm volatile( - "clr r17 \n\t" //page_word_count - "lds r30,address \n\t" //Address of FLASH location (in words) - "lds r31,address+1 \n\t" - "lsl r30 \n\t" //address * 2 -> byte location - "rol r31 \n\t" - "ldi r28,lo8(buff) \n\t" //Start of buffer array in RAM - "ldi r29,hi8(buff) \n\t" - "lds r24,length \n\t" //Length of data to be written (in bytes) - "lds r25,length+1 \n\t" - "sbrs r24,0 \n\t" //Even up an odd number of bytes - "rjmp length_loop \n\t" - "adiw r24,1 \n\t" - "length_loop: \n\t" //Main loop, repeat for number of words in block - "cpi r17,0x00 \n\t" //If page_word_count=0 then erase page - "brne no_page_erase \n\t" - "rcall wait_spm \n\t" -// "wait_spm1: \n\t" -// "lds r16,%0 \n\t" //Wait for previous spm to complete -// "andi r16,1 \n\t" -// "cpi r16,1 \n\t" -// "breq wait_spm1 \n\t" - "ldi r16,0x03 \n\t" //Erase page pointed to by Z - "sts %0,r16 \n\t" - "spm \n\t" - "rcall wait_spm \n\t" -// "wait_spm2: \n\t" -// "lds r16,%0 \n\t" //Wait for previous spm to complete -// "andi r16,1 \n\t" -// "cpi r16,1 \n\t" -// "breq wait_spm2 \n\t" - "ldi r16,0x11 \n\t" //Re-enable RWW section - "sts %0,r16 \n\t" - "spm \n\t" - "no_page_erase: \n\t" - "ld r0,Y+ \n\t" //Write 2 bytes into page buffer - "ld r1,Y+ \n\t" - - "rcall wait_spm \n\t" -// "wait_spm3: \n\t" -// "lds r16,%0 \n\t" //Wait for previous spm to complete -// "andi r16,1 \n\t" -// "cpi r16,1 \n\t" -// "breq wait_spm3 \n\t" - "ldi r16,0x01 \n\t" //Load r0,r1 into FLASH page buffer - "sts %0,r16 \n\t" - "spm \n\t" - - "inc r17 \n\t" //page_word_count++ - "cpi r17,%1 \n\t" - "brlo same_page \n\t" //Still same page in FLASH - "write_page: \n\t" - "clr r17 \n\t" //New page, write current one first - "rcall wait_spm \n\t" -// "wait_spm4: \n\t" -// "lds r16,%0 \n\t" //Wait for previous spm to complete -// "andi r16,1 \n\t" -// "cpi r16,1 \n\t" -// "breq wait_spm4 \n\t" - "ldi r16,0x05 \n\t" //Write page pointed to by Z - "sts %0,r16 \n\t" - "spm \n\t" - "rcall wait_spm \n\t" -// "wait_spm5: \n\t" -// "lds r16,%0 \n\t" //Wait for previous spm to complete -// "andi r16,1 \n\t" -// "cpi r16,1 \n\t" -// "breq wait_spm5 \n\t" - "ldi r16,0x11 \n\t" //Re-enable RWW section - "sts %0,r16 \n\t" - "spm \n\t" - "same_page: \n\t" - "adiw r30,2 \n\t" //Next word in FLASH - "sbiw r24,2 \n\t" //length-2 - "breq final_write \n\t" //Finished - "rjmp length_loop \n\t" - - "wait_spm: \n\t" - "lds r16,%0 \n\t" //Wait for previous spm to complete - "andi r16,1 \n\t" - "cpi r16,1 \n\t" - "breq wait_spm \n\t" - "ret \n\t" - - "final_write: \n\t" - "cpi r17,0 \n\t" - "breq block_done \n\t" - "adiw r24,2 \n\t" //length+2, fool above check on length after short page write - "rjmp write_page \n\t" - "block_done: \n\t" - "clr __zero_reg__ \n\t" //restore zero register - : "=m" (SPMCR) : "M" (PAGE_SIZE) : "r0","r16","r17","r24","r25","r28","r29","r30","r31"); - - /* Should really add a wait for RWW section to be enabled, don't actually need it since we never */ - /* exit the bootloader without a power cycle anyhow */ - } - putch(0x14); - putch(0x10); - } - } - - /* Read memory block mode, length is big endian. */ - else if(ch=='t') { - length.byte[1] = getch(); - length.byte[0] = getch(); - if (getch() == 'E') flags.eeprom = 1; - else { - flags.eeprom = 0; - address.word = address.word << 1; // address * 2 -> byte location - } - if (getch() == ' ') { // Command terminator - putch(0x14); - for (w=0;w < length.word;w++) { // Can handle odd and even lengths okay - if (flags.eeprom) { // Byte access EEPROM read - putch(eeprom_rb(address.word)); - address.word++; - } else { - if (!flags.rampz) putch(pgm_read_byte_near(address.word)); - address.word++; - } - } - putch(0x10); - } - } - - /* Get device signature bytes */ - else if(ch=='u') { - if (getch() == ' ') { - putch(0x14); - putch(SIG1); - putch(SIG2); - putch(SIG3); - putch(0x10); - } - } - - /* Read oscillator calibration byte */ - else if(ch=='v') { - byte_response(0x00); - } -// } else { -// time_count++; -// if (time_count>=MAX_TIME_COUNT) { -// app_start(); -// } -// } - } /* end of forever loop */ -} - -void putch(char ch) -{ - /* m8 */ - while (!(inb(UCSRA) & _BV(UDRE))); - outb(UDR,ch); -} - -char getch(void) -{ - /* m8 */ - uint32_t count = 0; - while(!(inb(UCSRA) & _BV(RXC))) { - /* HACKME:: here is a good place to count times*/ - count++; - if (count > MAX_TIME_COUNT) - app_start(); - } - return (inb(UDR)); -} - -void getNch(uint8_t count) -{ - uint8_t i; - for(i=0;i<count;i++) { - /* m8 */ - //while(!(inb(UCSRA) & _BV(RXC))); - //inb(UDR); - getch(); // need to handle time out - } -} - -void byte_response(uint8_t val) -{ - if (getch() == ' ') { - putch(0x14); - putch(val); - putch(0x10); - } -} - -void nothing_response(void) -{ - if (getch() == ' ') { - putch(0x14); - putch(0x10); - } -} - -/* end of file ATmegaBOOT.c */ - - - |