diff options
Diffstat (limited to 'test/ardmake/hardware/bootloaders/atmega8/ATmegaBOOT.c')
| -rw-r--r-- | test/ardmake/hardware/bootloaders/atmega8/ATmegaBOOT.c | 507 |
1 files changed, 507 insertions, 0 deletions
diff --git a/test/ardmake/hardware/bootloaders/atmega8/ATmegaBOOT.c b/test/ardmake/hardware/bootloaders/atmega8/ATmegaBOOT.c new file mode 100644 index 0000000..17977e6 --- /dev/null +++ b/test/ardmake/hardware/bootloaders/atmega8/ATmegaBOOT.c @@ -0,0 +1,507 @@ +/**********************************************************/ +/* 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 <avr/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 */ + + + |