Digital Input / Output

Controls digital input and output. More...

Defines
#define	PIN_A0   8
	Pin A0.
#define	PIN_A1   9
	Pin A1.
#define	PIN_A2   10
	Pin A2.
#define	PIN_A3   11
	Pin A3.
#define	PIN_A4   12
	Pin A4.
#define	PIN_A5   13
	Pin A5.
#define	PIN_A6   14
	Pin A6.
#define	PIN_A7   15
	Pin A7.
#define	PIN_SS   16
	Pin SS.
#define	PIN_SCK   17
	Pin SCK.
#define	PIN_MOSI   18
	Pin MOSI.
#define	PIN_MISO   19
	Pin MISO.
#define	PIN_LCD_COMMAND   20
	LCD Command Pin.
#define	PIN_C0   24
	Pin C0.
#define	PIN_C1   25
	Pin C1.
#define	PIN_C2   26
	Pin C2.
#define	PIN_C3   27
	Pin C3.
#define	PIN_C4   28
	Pin C4.
#define	PIN_C5   29
	Pin C5.
#define	PIN_C6   30
	Pin C6.
#define	PIN_C7   31
	Pin C7.
#define	PIN_SCL   32
	Pin SCL.
#define	PIN_SDA   33
	Pin SDA.
#define	PIN_RX0   40
	Pin RX0.
#define	PIN_TX0   41
	Pin TX0.
#define	PIN_LCD_RESET   42
	LCD Reset Pin.
#define	PIN_E6   46
	Pin E6.
#define	PIN_EXT_DIO1   46
	Pin EXT_DIO1.
#define	PIN_E7   47
	Pin E7.
#define	PIN_EXT_DIO2   48
	Pin EXT_DIO2.
#define	PIN_AN0   48
	Pin AN0.
#define	PIN_ADC0   48
	Pin ADC0.
#define	PIN_AN1   49
	Pin AN1.
#define	PIN_ADC1   49
	Pin ADC1.
#define	PIN_AN2   50
	Pin AN2.
#define	PIN_ADC2   50
	Pin ADC2.
#define	PIN_AN3   51
	Pin AN3.
#define	PIN_ADC3   51
	Pin ADC3.
#define	PIN_AN4   52
	Pin AN4.
#define	PIN_ADC4   52
	Pin ADC4.
#define	PIN_AN5   53
	Pin AN5.
#define	PIN_ADC5   53
	Pin ADC5.
#define	PIN_AN6   54
	Pin AN6.
#define	PIN_ADC6   54
	Pin ADC6.
#define	PIN_AN7   55
	Pin AN7.
#define	PIN_ADC7   55
	Pin ADC7.
#define	PIN_WHEEL   54
	Wheel Pin.
#define	PIN_BATT   55
	Battery Voltage Monitor Pin.
#define	PIN_BTN1   56
	button1 Pin
#define	PIN_BTN2   57
	button2 Pin
#define	PIN_LED1   58
	LED1 Pin.
#define	PIN_BTN   PING
	Button Pin.
#define	BTN2   PING1
	button2 Pin
#define	BTN1   PING0
	button1 Pin
Functions
int	digital_input (int)
	Read a portpin.
void	digital_output (int bit, int val)
	Output to a portpin.
void	digital_pull_up (int)
	Pullup a portpin.
int	button1_read (void)
	Check if button1 is pressed.
int	button1_click (void)
	Check if button1 is clicked.
void	button1_wait (void)
	Wait until button1 is pressed.
int	button2_read (void)
	Check if button2 is pressed.
int	button2_click (void)
	Check if button2 is clicked.
void	button2_wait (void)
	Wait until button2 is pressed.

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Detailed Description

Controls digital input and output.

A general note on how port / pin numbers work:
The portpin is used to select both the bank and which pin is selected. 6 bits are used (lower 6, ex: 0b00abcdef). The first 3 (abc in this example) are used to select the bank.
A = 001
B = 010
C = 011
D = 100
E = 101
F = 110
G = 111

The bank can be found by doing portpin >> 3.

The next three (def in this example) are used to select the pin number. These three bits are just the binary representation of the pin number.

The pin number can be found by doing portpin & 0b111.

Include dio.h to access these functions.

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Function Documentation

int button1_click (  void   )

Check if button1 is clicked. If button1 is pressed, waits until it is released before returning. Otherwise, the function returns immediately. Returns: 1 if button1 has been pressed, 0 otherwise See also: button1_read, button1_wait

int button1_read (  void   )

Check if button1 is pressed. Checks if button1 is currently pressed. Returns: 1 if button1 is pressed, 0 otherwise See also: button1_wait, button1_click

void button1_wait (  void   )

Wait until button1 is pressed. Delays execution until button1 is pressed. See also: button1_read, button1_click

int button2_click (  void   )

Check if button2 is clicked. If button2 is pressed, waits until it is released before returning. Otherwise, the function returns immediately. Returns: 1 if button2 has been pressed, 0 otherwise See also: button2_read, button2_wait

int button2_read (  void   )

Check if button2 is pressed. Checks if button2 is currently pressed. Returns: 1 if button2 is pressed, 0 otherwise See also: button2_wait, button2_click

void button2_wait (  void   )

Wait until button2 is pressed. Delays execution until button2 is pressed. See also: button2_read, button2_click

int digital_input (  int  portpin  )

Read a portpin. Reads the selected portpin. Parameters: portpin  The portpin to be read. See the general description for a description of portpins. Returns: 1 or 0, depending on the value of the portpin.

void digital_output (  int  portpin, int  val )

Output to a portpin. Sets portpin to the given value. Parameters: portpin  the portpin to output to. See the general description for a discussion of portpins. val  the value to set the portpin to. 0 for off, nonzero for on.

void digital_pull_up (  int  portpin  )

Pullup a portpin. Enables pullup on a pin. If it is an output pin, the pin will output 1. Parameters: portpin  the pin to enable pullup on. See the general description for a discussion of portpins.

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