BobBurns

;new program to set up and test the PN532 chip reader 
;compile with gavrasm write_pn532.asm ;flash with avrdude -c avrisp -p m168 -P /dev/tty.usbmodem1411 -b 19200 -U flash:w:write_pn532.asm
;
; I/O pins:
;	** use PORTB except RDYN on PORTD **
;	** SCK on pin 5 configured as output **
;	** MISO on pin 4 configured as input with pullup **
;	** MOSI on pin 3 configured as output **
;	** NSS on pin 2 configured as output **
;	** NSS on pin 2 not selected (high)

BobBurns

;this program attempts to read a MiFare card initialized with a name at address 0x04
;  and a value block at 0x05
;
;compile with gavrasm read_dec.asm ;flash with avrdude -c avrisp -p m168 -P /dev/tty.usbmodem1411 -b 19200 -U flash:w:read_dec.hex
;
; I/O pins:
;	** use PORTB except RDYN on PORTD **
;	** SCK on pin 5 configured as output **
;	** MISO on pin 4 configured as input with pullup **
;	** MOSI on pin 3 configured as output **

BobBurns

//  firmware to receive bytes from atmega186 over USART and send over Wifi
//  The atmega168 is programmed to talk to the pn532 nfc card reader and then send the card info
//    over USART.

#define debug 0
#define MAXLEN 256

TCPServer server = TCPServer(2342);
TCPClient client;
bool unlocked = false;

BobBurns

@       lets try to blink an LED on the discovery stm32 L1 board
@       uses LED on PB7 
@ how to compile and flash:
@  arm-none-eabi-as -mcpu=cortex-m3 blinky.s -o blinky.o
@  arm-none-eabi-ld -v -T stm32.ld -nostartfiles -o blinky.elf blinky.o 
@  arm-none-eabi-objcopy -O binary blinky.elf blinky.bin
@ then from st-link (https://github.com/texane/stlink)
@  ./st-flash write ../first_arm/blinky.bin 0x08000000
  
        .thumb

BobBurns

/* linker script for STM32 Cortex M3 c/o pygmy.utoh.org */

SECTIONS
{
        /* interupt vectors start at zero */
        . = 0x0;        /* start of flash */

        .text : {  *(text)   }

        /* constant data follows code but still in flash */

BobBurns

@ cylon eyes for stm32L discovery
@       uses lcd software driver 1/4 duty 1/3 bias
@ how to compile and flash:
@  arm-none-eabi-as -mcpu=cortex-m3 cylon_eyes.s -o cylon_eyes.o
@  arm-none-eabi-ld -v -T stm32.ld -nostartfiles -o cylon_eyes.elf cylon_eyes.o 
@  arm-none-eabi-objcopy -O binary cylon_eyes.elf cylon_eyes.bin
@ then from st-link (https://github.com/texane/stlink)
@  ./st-flash write ../first_arm/cylon_eyes.bin 0x08000000
  
        .thumb

BobBurns

@ program: systick_tst.s
@ programmer: reb 
@ device: stm32L152c discovery eval board
@ description: blink led with systick count down
@               uses systick interrupt routine
@    
@ how to compile and flash:
@  arm-none-eabi-as -mcpu=cortex-m3 systick_tst.s -o systick_tst.o
@  arm-none-eabi-ld -v -T stm32.ld -nostartfiles -o systick_tst.elf systick_tst.o 
@  arm-none-eabi-objcopy -O binary systick_tst.elf systick_tst.bin

BobBurns

#include <stdio.h>

/* program to demonstrate how to find multiplicative inverse in Rijndal's Galois Field
 * part of the AES encryption algorithm or Rijndal's block cipher.
 *
 * code expanded on blog @ www.samiam/galois.html
 */


/* global vars */

BobBurns

#include <stdio.h>

/* Rijndael Field S-box transformation
 * part of the AES encryption algorythm or Rijndal's block cipher.
 *
 * code expanded on blog @ www.samiam/galois.html
 */


/* global vars */

BobBurns

#include <stdio.h>
#include <stdlib.h>

/* quick program to solve affine cipher with key a, b mod 26 */
/* usage: ./aff_c <key a> <key b> <optional e=encrypt> 
 *        cipher-text from stdin or pipe
 */


int