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doc/mega-xplained: add JTAG/Atmel-ICE instructions

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Adds instrucions for the Atmel-ICE with the JTAG header.
This commit is contained in:
danpetry 2019-03-19 15:32:55 +01:00 committed by Juan Carrano
parent 5488c5fef6
commit 4554b6cb13
1 changed files with 30 additions and 9 deletions
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39
boards/mega-xplained/doc.txt
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@ -10,21 +10,42 @@ is an evaluation kit by Atmel (now Microchip) for their ATmega1284P microcontrol
### Flash the board
1. The board may be flashed through JTAG or using a SPI ISP programmer. If
the Buspirate is being used, then `make flash` can be used to flash the
board:
```
make BOARD=mega-xplained -C examples/hello-world flash
```
You can change the fuses and flash the board using an SPI ISP programmer such
as the Bus Pirate, or using a JTAG programmer such as the Atmel-ICE with a
JTAG adapter.
If using the Atmel-ICE as a JTAG programmer, connect the adapter with the
square pin on the adapter connecting with the square pin on the board.
1. First, make sure the default fuse settings are correct.<br/>
WARNING: setting the fuses incorrectly can brick your board!
2. The default fuse settings must also be changed.<br/>
If using the Buspirate:
```
avrdude -p m1284p -c buspirate -P /dev/ttyUSB0 -U efuse:w:0xFF:m
avrdude -p m1284p -c buspirate -P /dev/ttyUSB0 -U hfuse:w:0x99:m
avrdude -p m1284p -c buspirate -P /dev/ttyUSB0 -U lfuse:w:0xE2:m
```
WARNING: setting the fuses incorrectly can brick your board!
If using the Atmel-ICE:
```
avrdude -p m1284p -c atmelice -U efuse:w:0xFF:m
avrdude -p m1284p -c atmelice -U hfuse:w:0x99:m
avrdude -p m1284p -c atmelice -U lfuse:w:0xE2:m
```
2. After the fuses are set, flash the application.
If using the Buspirate:
```
BOARD=mega-xplained make -C examples/hello-world flash
```
If using the Atmel-ICE:
```
BOARD=mega-xplained PROGRAMMER=atmelice make -C examples/hello-world flash
```
### Accessing STDIO via UART
@ -32,6 +53,6 @@ STDIO can be accessed through the USB connector. The on-board UART-USB
adapter is not affected by flashing. It shows up as /dev/ttyACM0 on Linux.
It will be used automatically with `make term`:
```
make BOARD=mega-xplained -C examples/hello-world term
BOARD=mega-xplained make -C examples/hello-world term
```
*/