freertos_twi_master.c File Reference

FreeRTOS Peripheral Control API For the TWI.

Copyright (c) 2012-2018 Microchip Technology Inc. and its subsidiaries.

#include <string.h>
#include "twi_master.h"
#include "freertos_twi_master.h"
#include "freertos_peripheral_control_private.h"

Data Structures
struct	twi_module

Macros
#define	IER_ERROR_INTERRUPTS   (TWI_IER_NACK | TWI_IER_ARBLST | TWI_IER_OVRE)
#define	MASK_ALL_INTERRUPTS   (0xffffffffUL)
#define	SR_ERROR_INTERRUPTS   (TWI_SR_NACK | TWI_SR_ARBLST | TWI_SR_OVRE)
#define	TWI_TIMEOUT_COUNTER   (0xffffffffUL)

Functions
freertos_twi_if	freertos_twi_master_init (Twi *p_twi, const freertos_peripheral_options_t *const freertos_driver_parameters)
	Initializes the FreeRTOS ASF TWI (I2C) master driver for the specified TWI port. More...
status_code_t	freertos_twi_read_packet_async (freertos_twi_if p_twi, twi_packet_t *p_packet, portTickType block_time_ticks, xSemaphoreHandle notification_semaphore)
	Initiate a completely asynchronous multi-byte read operation on an TWI peripheral. More...
status_code_t	freertos_twi_write_packet_async (freertos_twi_if p_twi, twi_packet_t *p_packet, portTickType block_time_ticks, xSemaphoreHandle notification_semaphore)
	Initiate a completely asynchronous multi-byte write operation on a TWI peripheral. More...
static void	local_twi_handler (const portBASE_TYPE twi_index)

Variables
static const freertos_pdc_peripheral_parameters_t	all_twi_definitions [MAX_TWIS]
static const freertos_dma_event_control_t	null_dma_control = {NULL, NULL}
static freertos_dma_event_control_t	rx_dma_control [MAX_TWIS]
static struct twi_module	twis [MAX_TWIS]
static freertos_dma_event_control_t	tx_dma_control [MAX_TWIS]

#define IER_ERROR_INTERRUPTS   (TWI_IER_NACK | TWI_IER_ARBLST | TWI_IER_OVRE)

Referenced by freertos_twi_master_init(), freertos_twi_read_packet_async(), and freertos_twi_write_packet_async().

#define MASK_ALL_INTERRUPTS   (0xffffffffUL)

Referenced by freertos_twi_master_init().

#define SR_ERROR_INTERRUPTS   (TWI_SR_NACK | TWI_SR_ARBLST | TWI_SR_OVRE)

Referenced by local_twi_handler().

#define TWI_TIMEOUT_COUNTER   (0xffffffffUL)

Referenced by freertos_twi_read_packet_async(), freertos_twi_write_packet_async(), and local_twi_handler().

static void local_twi_handler ( const portBASE_TYPE  twi_index )

static

References twi_module::buffer, twi_module::length, NULL, pdc_disable_transfer(), pdFALSE, freertos_peripheral_parameters::peripheral_base_address, SR_ERROR_INTERRUPTS, twi_disable_interrupt(), twi_get_interrupt_mask(), twi_get_interrupt_status(), TWI_TIMEOUT_COUNTER, twis, and xSemaphoreGiveFromISR.

const freertos_pdc_peripheral_parameters_t all_twi_definitions[MAX_TWIS]

static

const freertos_dma_event_control_t null_dma_control = {NULL, NULL}

static

freertos_dma_event_control_t rx_dma_control[MAX_TWIS]

static

struct twi_module twis[MAX_TWIS]

static

Referenced by freertos_twi_read_packet_async(), freertos_twi_write_packet_async(), and local_twi_handler().

freertos_dma_event_control_t tx_dma_control[MAX_TWIS]

static