Flash atmega328p using Raspberry Pi

flash-atmega328-using-raspi.md

Flash atmega328p using Raspberry Pi

1. Download avrdude, sudo apt install avrdude

2. Copy avrdude.conf to home cp /etc/avrdude.conf ~/avrdude_gpio.conf

3. Open avrdude_gpio.conf, and find linuxspi, then change baudrate to 115200

4. Add below code to the bottom of that file

   # Linux GPIO configuration for avrdude.
   programmer
     id = "pi_1";
     desc = "Use the Linux sysfs interface to bitbang GPIO lines";
     type = "linuxgpio";
     reset = 17;
     sck = 24;
     mosi = 23;
     miso = 18;
   ;   
   

5. Connect the pin as table below

   ICSP	Raspi
   1 (MISO)	Pin 12 (GPIO 18)
   2 (5V)	Pin 2 (Vcc 5V)
   3 (SCK)	Pin 18 (GPIO 24)
   4 (MOSI)	Pin 16 (GPIO 23)
   5 (RESET)	Pin 11 (GPIO 17)
   6 (GND)	Pin 6 or 14 or 20 or 32

   ICSP usually like this (Pin 1 is a boxed pin, and the rest is round

   1	2
   3	4
   5	6

   and For the pinout for Raspberry Pi, please see this pinout.xyz

6. Now, on home directory where avrdude_gpio.conf exist, use this command to initialize the microcontroller

   sudo avrdude -C avrdude_gpio.conf -c pi_1 -p m328p -V -U lfuse:w:0xff:m -U hfuse:w:0xdb:m -U efuse:w:0xfd:m

   Note: if it say "AVR Device not responding", you need to click reset button when flashing, it should show load for Reading and Writing like below

   avrdude: AVR device initialized and ready to accept instructions
   
   Reading | ################################################## | 100% 0.00s
   
   avrdude: Device signature = 0x1e950f (probably m328p)
   avrdude: reading input file "0xff"
   avrdude: writing lfuse (1 bytes):
   
   Writing | ################################################## | 100% 0.00s
   
   avrdude: 1 bytes of lfuse written
   avrdude: reading input file "0xdb"
   avrdude: writing hfuse (1 bytes):
   
   Writing | ################################################## | 100% 0.00s
   
   avrdude: 1 bytes of hfuse written
   avrdude: reading input file "0xfd"
   avrdude: writing efuse (1 bytes):
   
   Writing | ################################################## | 100% 0.00s
   
   avrdude: 1 bytes of efuse written
   
   avrdude: safemode: Fuses OK (E:FD, H:DB, L:FF)
   
   avrdude done.  Thank you.

7. When it say done, now it's time to flash the firmware, here i flash firmware for wagiminator/ATmega-Soldering-Station, so i just run this command

   sudo avrdude -C avrdude_gpio.conf -c pi_1 -p m328p -V -U flash:w:SolderingStation2_v1.8.hex

   and it will show like below

   avrdude: AVR device initialized and ready to accept instructions
   
   Reading | ################################################## | 100% 0.00s
   
   avrdude: Device signature = 0x1e950f (probably m328p)
   avrdude: NOTE: "flash" memory has been specified, an erase cycle will be performed
            To disable this feature, specify the -D option.
   avrdude: erasing chip
   avrdude: reading input file "SolderingStation2_v1.8.hex"
   avrdude: input file SolderingStation2_v1.8.hex auto detected as Intel Hex
   avrdude: writing flash (24006 bytes):
   
   Writing | ################################################## | 100% 13.08s
   
   avrdude: 24006 bytes of flash written
   
   avrdude: safemode: Fuses OK (E:FD, H:DB, L:FF)
   
   avrdude done.  Thank you.