RP2xxx Backend

Raspberry Pi RP2040/RP2350 Joybus backend. More...

Data Structures
struct	joybus_rp2xxx_data
struct	joybus_rp2xxx
	A RP2xxx Joybus instance. More...
struct	joybus_rp2xxx_config
	Configuration for a RP2xxx Joybus instance. More...

Macros
#define	JOYBUS_RP2XXX(bus)
	Macro to cast a generic Joybus instance to a RP2xxx Joybus instance.

Functions
static void	joybus_rp2xxx_set_irq_handler_sdk (uint irq_num, irq_handler_t handler)
	Install an interrupt handler through the pico-sdk.
static struct joybus_rp2xxx_config	joybus_rp2xxx_config_default (uint8_t gpio)
	Build a RP2xxx config with default values.
int	joybus_rp2xxx_init (struct joybus_rp2xxx *rp2xxx_bus, struct joybus_rp2xxx_config config)
	Initialize a RP2xxx Joybus instance.

Detailed Description

Raspberry Pi RP2040/RP2350 Joybus backend.

Macro Definition Documentation

JOYBUS_RP2XXX

#define JOYBUS_RP2XXX

(

bus

)

Value:

((struct joybus_rp2xxx *)(bus))

Macro to cast a generic Joybus instance to a RP2xxx Joybus instance.

Function Documentation

joybus_rp2xxx_config_default()

struct joybus_rp2xxx_config joybus_rp2xxx_config_default ( uint8_t gpio )

inlinestatic

Build a RP2xxx config with default values.

An RTOS that builds its own vector table has to replace set_irq_handler.

Parameters

gpio	the GPIO pin to use for the Joybus data line

Returns

a config with the given GPIO, the pio0 instance, and a nominal frequency

joybus_rp2xxx_init()

int joybus_rp2xxx_init	(	struct joybus_rp2xxx *	rp2xxx_bus,
		struct joybus_rp2xxx_config	config )

Initialize a RP2xxx Joybus instance.

Parameters

rp2xxx_bus	the RP2xxx Joybus instance to initialize
config	the configuration to use, eg. from joybus_rp2xxx_config_default()

Returns

0 on success, a negative joybus_error on failure

joybus_rp2xxx_set_irq_handler_sdk()

void joybus_rp2xxx_set_irq_handler_sdk ( uint irq_num, irq_handler_t handler )

inlinestatic

Install an interrupt handler through the pico-sdk.

Parameters

irq_num	the interrupt to take
handler	what to call, which runs in interrupt context