[−][src]Module dma_gpio::pi

Module for Board and BoardBuilder structs

Use BoardBuilder struct to initialize the Board struct, and use Board struct to manipulate GPIO Pins.

Structs

Board	Struct for dealing with GPIO Pins.
BoardBuilder	Struct for initialzing Board and configuring the settings.

DEFAULT_CYCLE_TIME	= 2000. Default period of the PWM signal.
DEFAULT_NUM_CHANNELS	= 9. Default number of channels.
DEFAULT_PWM_DIVISOR	= 500. Default value for pwm div.
DEFAULT_SAMPLE_DELAY	= 10. Pulse width increment granularity.
DELAY_VIA_PCM	Indicates using PCM
DELAY_VIA_PWM	Indicates using PWM
MAX_CHANNELS	= 32. The highest gpio we can address.
NUM_CBS	= NUM_SAMPLES * 2 = 400. Number of Control Blocks.
NUM_SAMPLES	= DEFAULT_CYCLE_TIME/DEFAULT_SAMPLE_DELAY = 200. Number of samples.

BANNED_PINS	[6, 28, 29, 30, 31, 40, 45, 46, 47, 48, 49, 50, 51, 52, 53]. List of reserved GPIO pins
DEFAULT_PINS	[4, 17, 18, 27, 21, 22, 23, 24, 25]. 9 default GPIO pins on pi.

is_banned_pin	Check if the pin provided is found in the list of BANNED pins.
udelay	delay for # us seconds.