twi_megarf.c File Reference

megaRF TWI master and slave driver.

Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.

#include "twi_megarf.h"

Macros
#define	MASTER   0
	TWI Mode of operation. More...
#define	SLAVE   1

Functions
	ISR (TWI_vect)
	TWI interrupt Vector. More...
static void	twi_interrupt_handler (void)
	TWI Interrupt Handler. More...
static void	twi_master_addr_ack (void)
	Notification that address byte was written to the TWI and need to send ACK or NACK. More...
static void	twi_master_bus_reset (void)
	Reset TWI bus. More...
static void	twi_master_data_write (void)
	Sending data to twi bus. More...
status_code_t	twi_master_get_status (void)
	returns the status of TWI bus More...
status_code_t	twi_master_init (volatile void *twi, twi_master_options_t *opt)
	Inits TWI module as master. More...
static void	twi_master_internal_addr_write (void)
	Sending internal device address to twi bus. More...
status_code_t	twi_master_read (volatile void *twi, const twi_package_t *package)
	Reads the series of bytes from the TWI bus. More...
static void	twi_master_read_done (uint8_t data)
	Notification that byte was read by the TWI. More...
static void	twi_master_read_last_byte (uint8_t data)
	Notification that last byte was read from the TWI. More...
static void	twi_master_start (void)
	Notification about the start condition was sent. More...
status_code_t	twi_master_write (volatile void *twi, const twi_package_t *package)
	Perform a TWI master write transfer. More...
static void	twi_master_write_done (void)
	Notification that byte was written to the TWI. More...
static void	twi_slave_bus_reset (void)
	Reset TWI bus. More...
static void	twi_slave_data_read (uint8_t data)
	Read received data. More...
static void	twi_slave_data_write (void)
	Sending data to twi bus. More...
static void	twi_slave_enable (void)
	Enable TWI as slave. More...
status_code_t	twi_slave_init (uint8_t twi_slave_ownadd)
	Initialize TWI as Slave. More...
static void	twi_slave_last_byte_write_done (void)
	Notification of Last byte is transmitted. More...
status_code_t	twi_slave_start (slave_data_buffer_t *package)
	Start the slave Transceiver. More...
int	twi_slave_state_get (void)
	Get the state of TWI transceiver. More...
int	twi_slave_status_get (void)
	Get the status of TWI transceiver. More...
void	twi_slave_status_reset (void)
	Resets the slave state and status to initial for next transmission/reception. More...
static void	twi_slave_write_byte (uint8_t data)
	writing an byte to TWI. More...

Variables
struct {
int   addr_count
unsigned int   data_count
twi_package_t *   pkg
uint8_t   state
status_code_t   status
}	master_transfer
	Master Transfer Descriptor. More...
struct {
slave_data_buffer_t *   data_buffer
unsigned int   data_count
uint8_t   state
int   status
}	slave_transfer
	Slave Transfer Descriptor. More...
static volatile bool	twi_master_busy = false
static volatile bool	twi_mode = MASTER

#define MASTER   0

TWI Mode of operation.

Referenced by twi_interrupt_handler(), and twi_master_init().

#define SLAVE   1

Referenced by twi_slave_status_reset().

ISR

(

TWI_vect

)

TWI interrupt Vector.

References twi_interrupt_handler().

static void twi_interrupt_handler ( void  )

static

TWI Interrupt Handler.

References ERR_BUSY, ERR_IO_ERROR, ERR_PROTOCOL, MASTER, master_transfer, slave_transfer, status, TWI_IDLE, twi_master_addr_ack(), twi_master_bus_reset(), twi_master_busy, twi_master_read_done(), twi_master_read_last_byte(), twi_master_start(), twi_master_write_done(), twi_mode, TWI_PROCESS, twi_read_byte(), twi_slave_bus_reset(), twi_slave_data_read(), twi_slave_data_write(), twi_slave_enable(), twi_slave_last_byte_write_done(), TWI_STATUS_IO_ERROR, TWI_STATUS_PROTOCOL_ERROR, TWI_STATUS_RX_COMPLETE, TWI_TWSR_STATUS_MASK, TWS_BUSERROR, TWS_M_ARB_LOST, TWS_MR_DATA_ACK, TWS_MR_DATA_NACK, TWS_MR_SLA_ACK, TWS_MR_SLA_NACK, TWS_MT_DATA_ACK, TWS_MT_DATA_NACK, TWS_MT_SLA_ACK, TWS_MT_SLA_NACK, TWS_RSTART, TWS_SR_GEN_ACK, TWS_SR_GEN_ACK_M_ARB_LOST, TWS_SR_GEN_DATA_ACK, TWS_SR_GEN_DATA_NACK, TWS_SR_SLA_ACK, TWS_SR_SLA_ACK_M_ARB_LOST, TWS_SR_SLA_DATA_ACK, TWS_SR_SLA_DATA_NACK, TWS_SR_STOP_RESTART, TWS_ST_DATA_ACK, TWS_ST_DATA_ACK_LAST_BYTE, TWS_ST_DATA_NACK, TWS_ST_SLA_ACK, TWS_ST_SLA_ACK_M_ARB_LOST, and TWS_START.

Referenced by ISR().

int addr_count

slave_data_buffer_t* data_buffer

Referenced by main().

unsigned int data_count

struct { ... } master_transfer

Master Transfer Descriptor.

Referenced by twi_interrupt_handler(), twi_master_addr_ack(), twi_master_bus_reset(), twi_master_data_write(), twi_master_get_status(), twi_master_internal_addr_write(), twi_master_read(), twi_master_read_done(), twi_master_read_last_byte(), twi_master_start(), twi_master_write(), and twi_master_write_done().

twi_package_t* pkg

struct { ... } slave_transfer

Slave Transfer Descriptor.

Referenced by twi_interrupt_handler(), twi_slave_bus_reset(), twi_slave_data_read(), twi_slave_data_write(), twi_slave_init(), twi_slave_last_byte_write_done(), twi_slave_start(), twi_slave_state_get(), twi_slave_status_get(), and twi_slave_status_reset().

uint8_t state

Referenced by nwkFrameAlloc(), phyTrxSetState(), RxHandler(), and set_main_state().

int status

volatile bool twi_master_busy = false

static

Referenced by twi_interrupt_handler(), twi_master_bus_reset(), twi_master_data_write(), twi_master_read(), twi_master_read_last_byte(), and twi_master_write().

volatile bool twi_mode = MASTER

static

Referenced by twi_interrupt_handler(), twi_master_init(), and twi_slave_status_reset().