twis.c File Reference

TWIS driver for SAM.

This file defines a useful set of functions for the TWIS on SAM4L devices.

Copyright (c) 2013-2018 Microchip Technology Inc. and its subsidiaries.

#include "twis.h"
#include "sleepmgr.h"

Macros
#define	TWIS_SR_ERROR
	Define all error conditions. More...

Functions
void	twis_disable (struct twis_dev_inst *const dev_inst)
	Disable TWIS Module. More...
void	twis_enable (struct twis_dev_inst *const dev_inst)
	Enable TWIS Module. More...
static uint32_t	twis_find_ch_num (Twis *const twis)
	Get TWIS channel number. More...
void	twis_get_config_defaults (struct twis_config *const cfg)
	Get the TWIS master default configurations. More...
enum status_code	twis_init (struct twis_dev_inst *const dev_inst, Twis *const twis, struct twis_config *config)
	Initialize the TWI Slave Module. More...
static void	twis_interrupt_handler (uint32_t ch)
	TWIS interrupt handler. More...
void	twis_set_callback (struct twis_dev_inst *const dev_inst, twis_interrupt_source_t source, twis_callback_t callback, uint8_t irq_level)
	Set callback for TWIS. More...
static void	twis_set_config (struct twis_dev_inst *const dev_inst, struct twis_config *config)
	Configure the TWIS Module. More...

Variables
twis_callback_t	twis_callback_pointer [TWIS_INST_NUM]
struct twis_dev_inst *	twis_instances [TWIS_INST_NUM]

#define TWIS_SR_ERROR

Value:

(TWIS_SR_BUSERR \
        | TWIS_SR_SMBPECERR           \
        | TWIS_SR_SMBTOUT             \
        | TWIS_SR_ORUN                \
        | TWIS_SR_URUN)

Define all error conditions.

Referenced by twis_interrupt_handler().

static uint32_t twis_find_ch_num ( Twis *const  twis )

static

Get TWIS channel number.

Parameters

twis	Base address of the TWIS

Returns

TWIS channel number

Referenced by twis_init(), and twis_set_callback().

static void twis_interrupt_handler ( uint32_t  ch )

static

TWIS interrupt handler.

Parameters

Base	address of the TWIS

References dev_inst, twis_callback::error, twis_dev_inst::hw_dev, twis_callback::rx, status, twis_callback::stop, twis_clear_status(), twis_disable_interrupt(), twis_enable_interrupt(), twis_get_interrupt_mask(), twis_get_status(), TWIS_INTERRUPT_ALL, TWIS_INTERRUPT_BYTE_TRANS_FINISHED, TWIS_INTERRUPT_ERRORS, TWIS_INTERRUPT_RESTART_RECEIVED, TWIS_INTERRUPT_RX_BUFFER_READY, TWIS_INTERRUPT_SLAVEADR_MATCH, TWIS_INTERRUPT_TRANS_COMP, TWIS_SR_ERROR, and twis_callback::tx.

static void twis_set_config ( struct twis_dev_inst *const  dev_inst, struct twis_config *  config  )

static

Configure the TWIS Module.

Parameters

dev_inst	Device structure pointer
config	Configuration for the TWIS

References twis_config::ack_general_call, twis_config::ack_slave_addr, twis_config::ack_smbus_default_addr, twis_config::ack_smbus_host_header, twis_config::chip, twis_config::enable_pec, twis_config::exp, twis_config::fs_dadrivel, twis_config::fs_daslew, twis_config::fs_filter, twis_config::hddat, twis_config::hs_dadrivel, twis_config::hs_daslew, twis_config::hs_filter, twis_dev_inst::hw_dev, twis_config::smbus, twis_config::stretch_clk_addr, twis_config::stretch_clk_data, twis_config::stretch_clk_hr, twis_config::sudat, twis_config::ten_bit, twis_config::tlows, and twis_config::ttouts.

Referenced by twis_init().

twis_callback_t twis_callback_pointer[TWIS_INST_NUM]

struct twis_dev_inst* twis_instances[TWIS_INST_NUM]