Gecko Backend

Silicon Labs EFM32/EFR32 Joybus backend. More...

Data Structures
struct	joybus_gecko_data
struct	joybus_gecko
	A Gecko Joybus instance. More...
struct	joybus_gecko_config
	Configuration for a Gecko Joybus instance. More...

Macros
#define	JOYBUS_GECKO(bus)
	Macro to cast a generic Joybus instance to a Gecko Joybus instance.
#define	CHIPS_PER_BIT   4
#define	EDGES_PER_BYTE   16

Functions
static struct joybus_gecko_config	joybus_gecko_config_default (GPIO_Port_TypeDef port, uint8_t pin)
	Build a Gecko config with default values.
int	joybus_gecko_init (struct joybus_gecko *gecko_bus, struct joybus_gecko_config config)
	Initialize a Gecko Joybus instance.

Detailed Description

Silicon Labs EFM32/EFR32 Joybus backend.

Macro Definition Documentation

JOYBUS_GECKO

#define JOYBUS_GECKO

(

bus

)

Value:

((struct joybus_gecko *)(bus))

Macro to cast a generic Joybus instance to a Gecko Joybus instance.

Function Documentation

joybus_gecko_config_default()

struct joybus_gecko_config joybus_gecko_config_default ( GPIO_Port_TypeDef port, uint8_t pin )

inlinestatic

Build a Gecko config with default values.

Parameters

port	the GPIO port to use for the Joybus data line
pin	the GPIO pin to use for the Joybus data line

Returns

a config with the given GPIO, the TIMER0/USART0 peripherals, and a nominal frequency

joybus_gecko_init()

int joybus_gecko_init	(	struct joybus_gecko *	gecko_bus,
		struct joybus_gecko_config	config )

Initialize a Gecko Joybus instance.

Parameters

gecko_bus	the Gecko Joybus instance to initialize
config	the configuration to use, eg. from joybus_gecko_config_default()

Returns

0 on success, a negative joybus_error on failure