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@ -0,0 +1,15 @@
|
||||||
|
CFLAGS += -I /nix/store/8dm9wns7cjcjd3527s87lk4s8a1z6k93-avr-libc-2.0.0/avr/include
|
||||||
|
CFLAGS += -B /nix/store/8dm9wns7cjcjd3527s87lk4s8a1z6k93-avr-libc-2.0.0/avr/lib/avr25
|
||||||
|
CFLAGS += -L /nix/store/8dm9wns7cjcjd3527s87lk4s8a1z6k93-avr-libc-2.0.0/avr/lib/avr25
|
||||||
|
CFLAGS += -L /nix/store/8dm9wns7cjcjd3527s87lk4s8a1z6k93-avr-gcc-5.4.0/lib/gcc/avr/5.4.0/avr25
|
||||||
|
|
||||||
|
default:
|
||||||
|
# compile for attiny86 with warnings, optimizations, and 1 MHz clock frequency
|
||||||
|
avr-gcc $(CFLAGS) -Wall -Os -DF_CPU=8000000 -mmcu=attiny85 -o evinlight.o evinlight.c
|
||||||
|
avr-objcopy -j .text -j .data -O ihex evinlight.o evinlight.hex
|
||||||
|
avrdude -c buspirate -P /dev/ttyUSB0 -p t85 -U flash:w:evinlight.hex:i
|
||||||
|
stty -F /dev/ttyUSB0 115200 raw -echo -echoe -echok -echoctl -echoke
|
||||||
|
echo -e -n "m\n2\nW\n" > /dev/ttyUSB0
|
||||||
|
|
||||||
|
clean: /dev/null
|
||||||
|
rm -f evinlight.o evinlight.hex
|
||||||
|
|
@ -0,0 +1,103 @@
|
||||||
|
|
||||||
|
# ATTiny85 Hello World
|
||||||
|
|
||||||
|
Blinking an LED using an ATTiny85 programmed with `avr-gcc` and `avrdude` on Mac OS X.
|
||||||
|
|
||||||
|
## Mac OS X AVR toolchain install
|
||||||
|
|
||||||
|
Using Homebrew, tap [larsimmisch's homebrew-avr repository](https://github.com/larsimmisch/homebrew-avr):
|
||||||
|
|
||||||
|
```
|
||||||
|
brew tap larsimmisch/avr
|
||||||
|
brew install avr-libc
|
||||||
|
```
|
||||||
|
|
||||||
|
## Build steps
|
||||||
|
|
||||||
|
1. Compile with `avr-gcc`
|
||||||
|
2. Prepare the hex file with `avr-objcopy`
|
||||||
|
3. Flash the hex with `avrdude`
|
||||||
|
|
||||||
|
```
|
||||||
|
avr-gcc -Wall -Os -DF_CPU=1000000 -mmcu=attiny85 -o hello.o hello.c
|
||||||
|
avr-objcopy -j .text -j .data -O ihex hello.o hello.hex
|
||||||
|
avrdude -c usbtiny -p t85 -U flash:w:hello.hex:i
|
||||||
|
```
|
||||||
|
|
||||||
|
`F_CPU` must be defined at the `avr-gcc` command line or above the `#include <util/delay.h>`
|
||||||
|
so the delay library knows the microcontroller's clock speed.
|
||||||
|
|
||||||
|
## Breadboard configuration
|
||||||
|
|
||||||
|
Wire the ISP-6 cable from the USBTinyISP to the breadboarded ATTiny85 using jumpers.
|
||||||
|
|
||||||
|
### ISP-6 pinout
|
||||||
|
|
||||||
|
Looking at the ISP-6 *cable* with the connector key at the bottom, the pins are numbered
|
||||||
|
like this:
|
||||||
|
|
||||||
|
```
|
||||||
|
+-----------+
|
||||||
|
|(6) (4) (2)|
|
||||||
|
|(5) (3) (1)|
|
||||||
|
+-----------+
|
||||||
|
|_|
|
||||||
|
```
|
||||||
|
|
||||||
|
1. MISO
|
||||||
|
2. Vcc
|
||||||
|
3. SCK
|
||||||
|
4. MOSI
|
||||||
|
5. Reset
|
||||||
|
6. Ground
|
||||||
|
|
||||||
|
(See also [this photo](http://www.ics.uci.edu/~givargis/courses/cs145/resources/avrisp.png))
|
||||||
|
|
||||||
|
### ATTiny85 pintout
|
||||||
|
|
||||||
|
The ATTiny85's pins are:
|
||||||
|
|
||||||
|
```
|
||||||
|
(8) (7) (6) (5)
|
||||||
|
+---------------+
|
||||||
|
| |
|
||||||
|
| o |
|
||||||
|
+---------------+
|
||||||
|
(1) (2) (3) (4)
|
||||||
|
```
|
||||||
|
|
||||||
|
1. PB5 (Reset)
|
||||||
|
2. PB3
|
||||||
|
3. PB4
|
||||||
|
4. Ground
|
||||||
|
5. PB0 (MOSI)
|
||||||
|
6. PB1 (MISO)
|
||||||
|
7. PB2 (SCK)
|
||||||
|
8. Vcc
|
||||||
|
|
||||||
|
### Programming jumpers
|
||||||
|
|
||||||
|
Connect the ISP and the ATTiny85 together on the Ground, MISO (Master In, Slave Out),
|
||||||
|
MOSI (Master Out, Slave In), SCK (Serial ClocK), Reset, and Vcc pins:
|
||||||
|
|
||||||
|
- ISP-6 pin 1–ATTiny85 pin 6 (MISO)
|
||||||
|
- ISP-6 pin 2–ATTiny85 pin 8 (Vcc)
|
||||||
|
- ISP-6 pin 3–ATTiny85 pin 7 (SCK)
|
||||||
|
- ISP-6 pin 4–ATTiny85 pin 5 (MOSI)
|
||||||
|
- ISP-6 pin 5–ATTiny85 pin 1 (Reset)
|
||||||
|
- ISP-6 pin 6–ATTiny85 pin 4 (Ground)
|
||||||
|
|
||||||
|
N.B. The ATTiny's pins 2 and 3 are unconnected.
|
||||||
|
|
||||||
|
### LED circuit
|
||||||
|
|
||||||
|
Power the LED with a transistor and a series resistor, switching the transistor using a resistor
|
||||||
|
from the ATTiny's pin 2 to the transistor's base.
|
||||||
|
|
||||||
|
## References
|
||||||
|
|
||||||
|
- [Honey, I Shrunk the Arduino](http://www.instructables.com/id/Honey-I-Shrunk-the-Arduino-Moving-from-Arduino-t/?ALLSTEPS)
|
||||||
|
- [ATTiny85 and ISP-6 pinouts](http://fabienroyer.wordpress.com/2010/12/12/build-a-cheap-flexible-avr-microcontroller-programming-target-board/)
|
||||||
|
- [ATTiny85 pinout](http://teslaui.files.wordpress.com/2012/11/attiny85_pins.png)
|
||||||
|
- [Atmel's in-system programming documentation](http://www.atmel.com/Images/doc0943.pdf)
|
||||||
|
|
||||||
|
|
@ -0,0 +1,15 @@
|
||||||
|
let
|
||||||
|
pkgs = import <nixpkgs> {};
|
||||||
|
in with pkgs; {
|
||||||
|
simpleEnv = stdenv.mkDerivation {
|
||||||
|
name = "simple-env";
|
||||||
|
version = "1";
|
||||||
|
buildInputs = [
|
||||||
|
avrgcc
|
||||||
|
avrbinutils
|
||||||
|
avrlibc
|
||||||
|
avrdude
|
||||||
|
picocom
|
||||||
|
];
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,150 @@
|
||||||
|
|
||||||
|
/**
|
||||||
|
*
|
||||||
|
* Blinking LED ATTiny85 "hello world"
|
||||||
|
*
|
||||||
|
* Following the tutorial at:
|
||||||
|
* http://www.instructables.com/id/Honey-I-Shrunk-the-Arduino-Moving-from-Arduino-t/?ALLSTEPS
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <avr/io.h>
|
||||||
|
// F_CPU frequency to be defined at command line
|
||||||
|
#include <util/delay.h>
|
||||||
|
|
||||||
|
#define TRUE 1
|
||||||
|
#define FALSE 0
|
||||||
|
|
||||||
|
#define LED0 PB3
|
||||||
|
#define LED1 PB2
|
||||||
|
#define LED2 PB1
|
||||||
|
#define LED3 PB0
|
||||||
|
#define LED4 PB4
|
||||||
|
|
||||||
|
|
||||||
|
const int leds[] = {LED0, LED1, LED2, LED3, LED4};
|
||||||
|
#define LED_COUNT (sizeof(leds) / sizeof(leds[0]))
|
||||||
|
uint8_t led_states[LED_COUNT];
|
||||||
|
|
||||||
|
#define DELAY_NORMAL 100;
|
||||||
|
#define DELAY_SLOW 150;
|
||||||
|
#define DELAY_FAST 50;
|
||||||
|
const int DELAY = DELAY_NORMAL;
|
||||||
|
|
||||||
|
void led_on(int led_index)
|
||||||
|
{
|
||||||
|
PORTB |= (1 << leds[led_index]);
|
||||||
|
led_states[led_index] = 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
void led_off(int led_index)
|
||||||
|
{
|
||||||
|
PORTB &= ~(1 << leds[led_index]);
|
||||||
|
led_states[led_index] = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
void setup_leds()
|
||||||
|
{
|
||||||
|
for (int i = 0; i != LED_COUNT; ++i)
|
||||||
|
{
|
||||||
|
DDRB |= (1 << leds[i]);
|
||||||
|
led_off(i);
|
||||||
|
led_states[i] = 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void accumulate_next(int led_index)
|
||||||
|
{
|
||||||
|
if(led_states[led_index])
|
||||||
|
{
|
||||||
|
led_off(led_index);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
led_on(led_index);
|
||||||
|
}
|
||||||
|
_delay_ms(DELAY);
|
||||||
|
}
|
||||||
|
|
||||||
|
void accumulate()
|
||||||
|
{
|
||||||
|
for (int i = 0; i != LED_COUNT; ++i)
|
||||||
|
accumulate_next(i);
|
||||||
|
}
|
||||||
|
|
||||||
|
void accumulate_backwards()
|
||||||
|
{
|
||||||
|
for (int i = LED_COUNT - 1; i >= 0; --i)
|
||||||
|
accumulate_next(i);
|
||||||
|
}
|
||||||
|
|
||||||
|
void row_next(int led_index, int previous_led_index)
|
||||||
|
{
|
||||||
|
led_on(led_index);
|
||||||
|
led_off(previous_led_index);
|
||||||
|
_delay_ms(DELAY);
|
||||||
|
}
|
||||||
|
|
||||||
|
void row()
|
||||||
|
{
|
||||||
|
for (int i = 0; i != LED_COUNT; ++i)
|
||||||
|
{
|
||||||
|
int previous = (i + LED_COUNT - 1) % LED_COUNT;
|
||||||
|
row_next(i, previous);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void row_backwards()
|
||||||
|
{
|
||||||
|
for (int i = LED_COUNT - 1; i >= 0; --i)
|
||||||
|
{
|
||||||
|
int previous = (i + 1) % LED_COUNT;
|
||||||
|
row_next(i, previous);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void all_on()
|
||||||
|
{
|
||||||
|
for (int i = 0; i != LED_COUNT; ++i)
|
||||||
|
led_on(i);
|
||||||
|
}
|
||||||
|
|
||||||
|
void toggle_all()
|
||||||
|
{
|
||||||
|
for (int i = 0; i != LED_COUNT; ++i)
|
||||||
|
{
|
||||||
|
if(led_states[i])
|
||||||
|
led_off(i);
|
||||||
|
else
|
||||||
|
led_on(i);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void blink(int ntimes)
|
||||||
|
{
|
||||||
|
setup_leds();
|
||||||
|
for (int i = 0; i != ntimes * 2; ++i)
|
||||||
|
{
|
||||||
|
toggle_all();
|
||||||
|
_delay_ms(DELAY);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int main ()
|
||||||
|
{
|
||||||
|
setup_leds();
|
||||||
|
while (1)
|
||||||
|
{
|
||||||
|
accumulate();
|
||||||
|
accumulate_backwards();
|
||||||
|
accumulate();
|
||||||
|
accumulate_backwards();
|
||||||
|
row();
|
||||||
|
row_backwards();
|
||||||
|
row();
|
||||||
|
row_backwards();
|
||||||
|
blink(5);
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
Loading…
Reference in New Issue