main
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Last change
on this file since 6390cc3 was 6390cc3, checked in by Adrien Destugues <pulkomandy@…>, 7 years ago |
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chiptest: Start to hack on ATmega128 and STK500 devboard.
- Set the proper clock for it (generated by the STK500 master MCU, did
not get crystal working reliably yet)
- Instead of just 'H', generate the whole alphabet for more action!
- Use ATmega128 since that's what happens to be seated on my board for
now.
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-
Property mode
set to
100644
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File size:
1.1 KB
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| 1 | Chiptest - The quick and dirty AVR tester.
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| 2 | ==========================================
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| 3 |
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| 4 | So, you made a new project board using an AVR microcontroller, and you want to
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| 5 | make sure it works before starting to develop your firmware. Debugging both
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| 6 | software and hardware at the same time is a pain.
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| 7 |
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| 8 | Enters chiptest. This is a simple test program that makes sure the most basic
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| 9 | stuff is working.
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| 10 |
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| 11 | Right now chiptest supports the following devices:
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| 12 | * ATTiny2313.
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| 13 | * ATmega128
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| 14 |
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| 15 | It tests the following features:
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| 16 | * USART
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| 17 | * Timers
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| 18 | * One GPIO
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| 19 |
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| 20 | How to use it
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| 21 | =============
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| 22 |
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| 23 | * Adjust the pinout at the top of main.c and the CPU clock in the makefile to
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| 24 | your needs
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| 25 | * Plug your usbasp and board
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| 26 | * make flash
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| 27 |
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| 28 | How to tell if it works
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| 29 | =======================
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| 30 |
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| 31 | If everything goes well:
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| 32 | * The LED will blink at FCPU/(8^3). This should be visible for all reasonable
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| 33 | clock speeds:
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| 34 | - 20 MHz - 0.8s
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| 35 | - 12 MHz - 1.4s
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| 36 | - 1 MHz - 16.8s
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| 37 | * The character 'H' is sent to the serial port at the same speed. Baudrate is
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| 38 | 9600 baud to be safe (it's more likely that a low baudrate can be generated
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| 39 | in a reasonably accurate way with any clock speed as a base).
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