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Version 0.5 (20040407)

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This commit is contained in:
Olaf Rempel 2006-05-01 19:13:32 +02:00
parent 85f5e95b07
commit f32c7e3131
5 changed files with 119 additions and 208 deletions
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81
bin/avrprog_boot_mega16_3_68MHz.hex
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77
bin/avrprog_boot_mega16_bootice.hex
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104
main.c
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@ -1,9 +1,9 @@
/*****************************************************************************
*
* AVRPROG compatible boot-loader
* Version : 0.4 (6. Apr. 2004)
* Version : 0.5 (7. Apr. 2004)
* Compiler : avr-gcc 3.3.1 / avr-libc 1.0
* size : ( larger than 512 words :-( )
* size : depends on features and startup ( minmal features < 512 words)
* by : Martin Thomas, Kaiserslautern, Germany
* eversmith@heizung-thomas.de
*
@ -41,10 +41,12 @@
* options for the newly created section. See the avr-libc FAQ, the avr-
* libc's avr/boot.h documentation and the makefile for further details.
*
* Sorry, so far efforts to shrink to 512 words failed.
* See the makefile for information how to adopt the linker-settings to
* the selected Boot Size (_Bxxx below)
*
* With BOOT_SIMPLE this bootloader has 0x3DE bytes size and should fit
* into a 512word bootloader-section.
*
****************************************************************************/
/*
Does not work so far:
@ -53,34 +55,52 @@
*/
// programmers-notepad tabsize 4
#define VERSION_HIGH '0'
#define VERSION_LOW '5'
#include <inttypes.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>
/* BOOTICE-Mode - to flash the JTAGICE upgrade.ebn file.
/* Port and Pin in this port that has to grounded
(active low) to start the bootloader */
#define BLPORT PORTC
#define BLPIN PINC
#define BLPNUM PINC0
/*
Select startup-mode
* SIMPLE-Mode - Jump to bootloader main BL-loop if key is
pressed (Pin grounded) "during" reset or jump to the
application if the pin is not grounded (=pulled up by
internal pull-up-resistor)
* POWERSAVE-Mode - Startup is separated in two loops
which makes power-saving a little easier if no firmware
is on the chip. Needs more memory
* BOOTICE-Mode - to flash the JTAGICE upgrade.ebn file.
No startup-sequence in this mode. Jump directly to the
parser-loop on reset
XTAL in BOOTICEMODE must be 7372800 Hz to be compatible
with the org. JTAGICE-Firmware */
// #define BOOTICEMODE
#define START_SIMPLE
//#define START_POWERSAVE
//#define START_BOOTICE
// UART handling - some definitions from P. Fleury's Library - thanks
#define BAUDRATE 19200
#ifndef BOOTICEMODE
#ifndef START_BOOTICE
#define XTAL 3686400
#else
#warning "BOOTICE mode - External Crystal/Oszillator must be 7,3728 MHz"
#define XTAL 7372800
#endif
// UART handling - some definitions from P. Fleury's Library - thanks
#define BAUDRATE 19200
#include "uart.h"
/* enable/disable readout of fuse and lock-bits
(will not work for Mega169 since not supported by AVRPROG 1.37 */
#define ENABLEREADFUSELOCK
// #define ENABLEREADFUSELOCK
/* enable/disable write of lock-bits
WARNING: lock-bits can not be reseted by bootloader (as far as I know)
@ -90,11 +110,10 @@
*/
// #define WRITELOCKBITS
/* Select Boot Size (select one, comment out the others)
select at least _B1024 */
/* Select Boot Size (select one, comment out the others) */
// NO! #define _B128
// NO! #define _B256
// NO! #define _B512
// MAYBE: #define _B512
#define _B1024
//#define _B2048
@ -131,13 +150,16 @@ void send_boot(void)
sendchar('T');
}
void (*jump_to_app)(void) = 0x0000;
int main(void)
{
void (*funcptr)( void ) = 0x0000; // Set up function pointer
unsigned short tempi;
char val;
#ifdef START_POWERSAVE
char OK = 1;
#endif
MCUCR = (1<<IVCE);
MCUCR = (1<<IVSEL); //move interruptvectors to the Boot sector
@ -145,26 +167,24 @@ int main(void)
USART_Init(UART_BAUD_SELECT(BAUDRATE,XTAL),UARTSINGLE); // single speed
// USART_Init(UART_BAUD_SELECT(BAUDRATE/2,XTAL),UARTDOUBLE); // double speed
#if defined(START_POWERSAVE)
/*
This is an adoption of the Butterfly Bootloader startup-sequence.
It may look a little strange but separating the login-loop from
the main parser-loop gives a lot a possibilities (timeout, sleep-modes
etc.).
*/
#ifndef BOOTICEMODE
PORTA = 0xFF; // Enable pullups on Port A
BLPORT = 0xFF; // Enable pullups on Port C
for(;OK;)
{
if((PINA & (1<<PINA7)))
if((BLPIN & (1<<BLPNUM)))
{
// jump to main app if PIN A7 is not grounded
PORTA = 0x00; // set to default
// jump to main app if PIN C0 is not grounded
BLPORT = 0x00; // set to default
MCUCR = (1<<IVCE);
MCUCR = (0<<IVSEL); //move interruptvectors to the Application sector
funcptr(); // Jump to application sector
jump_to_app(); // Jump to application sector
}
else
{
@ -182,9 +202,24 @@ int main(void)
else
sendchar('?');
}
// Power-Save code here
}
#else
#elif defined(START_SIMPLE)
BLPORT = 0xFF; // Enable pullups on Port C
if((BLPIN & (1<<BLPNUM)))
{
// jump to main app if PIN C0 is not grounded
BLPORT = 0x00; // set to default
MCUCR = (1<<IVCE);
MCUCR = (0<<IVSEL); //move interruptvectors to the Application sector
jump_to_app(); // Jump to application sector
}
#elif defined(START_BOOTICE)
#warning "BOOTICE mode - no startup-condition"
#else
#error "Select START_ condition for bootloader in main.c"
#endif
for(;;)
@ -380,7 +415,7 @@ int main(void)
#endif
// end of ENABLEREADFUSELOCK section
else if(val=='t') // Return programmer type
else if(val=='t') // Return device type
{
sendchar(devtype);
sendchar(0);
@ -405,8 +440,8 @@ int main(void)
else if (val=='V') // Return Software Version
{
sendchar('0');
sendchar('4');
sendchar(VERSION_HIGH);
sendchar(VERSION_LOW);
}
else if (val=='s') // Return Signature Byte
@ -462,7 +497,10 @@ unsigned char BufferLoad(unsigned int size, unsigned char mem)
} while(size); // Loop until all bytes written
/* commented out since not compatible with mega8 -
secondary benefit: saves memory
tempaddress &= 0xFF80; // Ensure the address points to the first byte in the page
*/
//write_page((tempaddress),0x05); // Program page contents
boot_page_write(tempaddress);
@ -470,15 +508,19 @@ unsigned char BufferLoad(unsigned int size, unsigned char mem)
// write_page(tempaddress,(1<<RWWSRE) + (1<<SPMEN));
boot_rww_enable(); //Re-enable the RWW section
/* commented out since not compatible with mega8
if (address != (address & 0xFF80))
{ // Ensure that the address points to the beginning of the next page
address &= 0xFF80;
address += SPM_PAGESIZE;
}
*/
} // End FLASH
if (mem == 'E') // Start EEPROM
{
address>>=1;
do {
EEARL = address; // Setup EEPROM address
EEARH = (address >> 8);
@ -508,16 +550,20 @@ unsigned char BufferLoad(unsigned int size, unsigned char mem)
void BlockRead(unsigned int size, unsigned char mem)
{
unsigned int data;
// Disable interrupts if needed
/*
unsigned char sreg;
// Disable interrupts.
sreg = SREG;
cli();
*/
my_eeprom_busy_wait();
if (mem == 'E') // Read EEPROM
{
// address>>=1; // not needed here - hmm, somehow inconsistant TODO
do {
EEARL = address; // Setup EEPROM address
EEARH = (address >> 8);
@ -538,6 +584,6 @@ void BlockRead(unsigned int size, unsigned char mem)
} while (size); // Repeat until all block has been read
}
// Re-enable interrupts (if they were ever enabled).
SREG=sreg;
/*SREG=sreg;*/
}

23
makefile
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@ -31,7 +31,21 @@
# MCU name
MCU = atmega16
## MCU = atmega16
MCU = atmega8
################## BOOTLOADER ######################
# mt: Boot loader support. So far not done with a separate section
# to get the interrupt vector into the bootloader area.
# Bootloader address in datasheet and stk500 is given as
# "word", gcc toolchain needs "byte"-address
# (see LDFLAGS further down)
# 0x1C00*2=0x3800 for ATmega16 1024 words Boot Size
## MT_BOOTLOADER_ADDRESS = 3800
# 0x0C00*2=0x1800 for ATmega8 1024 words Boot Size
MT_BOOTLOADER_ADDRESS = 1800
# Output format. (can be srec, ihex, binary)
FORMAT = ihex
@ -123,11 +137,8 @@ LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
LDFLAGS += -lm
################## BOOTLOADER ######################
# mt: Boot loader support. So far not done with a separate section
# to get the interrupt vector into the bootloader area.
# bootloader address in datasheet and stk500 is given as
# "word", gcc toolchain needs "byte"-address (here: 0x1C00*2)
MT_BOOTLOADER_ADDRESS = 3800
# MT_BOOTLOADER_ADDRESS (=Start of Boot Loader section
# in bytes - not words) is defined above.
LDFLAGS += -Wl,--section-start=.text=$(MT_BOOTLOADER_ADDRESS)
# Programming support using avrdude. Settings and variables.

14
readme.txt
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@ -15,6 +15,18 @@
======================================================
7. Apr. 2004 - Version 0.5
* added different startup-methods
* compatible with ATmega8 now
* included makefile adopted to ATmega8 now
(ATmega16 options still available)
* fixed jump to application which did not work
reliably before
* tested with ATmega8
* minimal options and startup-code result in
bootloader-size < 512 words
6. Apr. 2004 - Version 0.4
* Buffered read of chars from UART during programming
@ -29,7 +41,7 @@ out during the development of the STK-500-compatible
bootloader. But setting lock-bits still does not
work with this bootloader.
* read of the low-fuse byte works (high byte still TODO)
* read of the lock-byte works (wirte still TODO)
* read of the lock-byte works (write still TODO)
27. Mar 2004 - Version 0.3