blob: 6b61a56bb8cd9a59fe39b4cda70f2f5e6441b80f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
// Function to get current state (high\low) of a digital pin on AVR
//
// Calling Sequence
// u8AVRDigitalIns(port,pin)
//
// Parameters
// port : port of microcontroller to be used (1 for PORTA, 2 for PORTB,...)
// pin : pin of port (mentioned above) to be used
// Returns->
// state : state of the pin (0 for low and 1 for high)
//
// Description
// Each AVR microcontroller has pins which can be configured as digital
// outputs. These are normally divided among some 'ports' (group of pins).
// User has to select one of these port and which pin of that port is to
// be read. Function returns current state of the pin '1' (high) or '0' (low).
//
//
// Examples
// state = u8AVRDigitalIns(1,0)
//
// Authors
// Siddhesh Wani
//
#include "AVRPeripheralGPIO.h"
uint8 u8AVRDigitalIns(uint8 port,uint8 pin)
{
uint8 state = 0;
if(port == PORT_A)
{
state = (uint8)(PINA & (1<<pin));
return state;
}
if(port == PORT_B)
{
state = (uint8)(PINB & (1<<pin));
return state;
}
if(port == PORT_C)
{
state = (uint8)(PINC & (1<<pin));
return state;
}
if(port == PORT_D)
{
state = (uint8)(PIND & (1<<pin));
return state;
}
//return state;
}
|
