Gecko Backend

Joybus backend for Silicon Labs EFM32/EFR32 MCUs using the Gecko SDK. More...

Data Structures
struct	joybus_gecko_data
struct	joybus_gecko
	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
int	joybus_gecko_init (struct joybus_gecko *gecko_bus, GPIO_Port_TypeDef port, uint8_t pin, TIMER_TypeDef *rx_timer, USART_TypeDef *tx_usart)
	Initialize a Gecko Joybus instance.

Detailed Description

Joybus backend for Silicon Labs EFM32/EFR32 MCUs using the Gecko SDK.

Configuration

The Gecko backend is made available by setting JOYBUS_BACKEND_GECKO=ON in your CMake configuration.

Usage

#include <joybus/joybus.h>
#include <joybus/backend/gecko.h>
 
struct joybus_gecko gecko_bus;
struct joybus *bus = JOYBUS(&gecko_bus);
 
void main() {
  // Initialize and enable the bus using the Gecko backend
  joybus_gecko_init(&gecko_bus, gpioPortD, 3, TIMER1, USART0);
  joybus_enable(bus);
 
  // Use the bus...
}

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_init()

int joybus_gecko_init	(	struct joybus_gecko *	gecko_bus,
		GPIO_Port_TypeDef	port,
		uint8_t	pin,
		TIMER_TypeDef *	rx_timer,
		USART_TypeDef *	tx_usart )

Initialize a Gecko Joybus instance.

Note: Some peripherals cannot be used on certain ports, check the DBUS Routing Table in the reference manual for your MCU.

Parameters

gecko_bus	the Gecko Joybus instance to initialize
port	the GPIO port to use for the Joybus data line
pin	the GPIO pin to use for the Joybus data line
rx_timer	the TIMER peripheral to use for receiving data
tx_usart	the USART peripheral to use for transmitting data

Returns

0 on success, negative error code on failure