Moving bootloaders into the hardware/bootloaders directory.

1 files changed, 507 insertions, 0 deletions

diff --git a/bootloaders/atmega8/ATmegaBOOT.c b/bootloaders/atmega8/ATmegaBOOT.c
new file mode 100755
index 0000000..17977e6
--- /dev/null
+++ b/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 */
+
+
+