SAM Control Area Network (MCAN) Low Level Driver.

#include "mcan.h"
#include "pmc.h"
#include "genclk.h"
#include <string.h>
#include <sysclk.h>

Macros
#define	BIT_2_TO_15_MASK 0x0000fffc

#define	PMC_PCK_5 5

Functions
static void	_mcan_enable_peripheral_clock (struct mcan_module *const module_inst)
	enable can module clock. More...

static void	_mcan_message_memory_init (Mcan *hw)
	initialize MCAN memory . More...

static void	_mcan_set_configuration (Mcan hw, struct mcan_config config)
	set default configuration when initialization. More...

void	mcan_disable_bus_monitor_mode (struct mcan_module *const module_inst)
	disable bus monitor mode of mcan module. More...

void	mcan_disable_fd_mode (struct mcan_module *const module_inst)
	disable fd mode of mcan module. More...

void	mcan_disable_restricted_operation_mode (struct mcan_module *const module_inst)
	disable restricted mode of mcan module. More...

void	mcan_disable_sleep_mode (struct mcan_module *const module_inst)
	disable sleep mode of mcan module. More...

void	mcan_disable_test_mode (struct mcan_module *const module_inst)
	disable test mode of mcan module. More...

void	mcan_enable_bus_monitor_mode (struct mcan_module *const module_inst)
	enable bus monitor mode of mcan module. More...

void	mcan_enable_fd_mode (struct mcan_module *const module_inst)
	switch mcan module into fd mode. More...

void	mcan_enable_restricted_operation_mode (struct mcan_module *const module_inst)
	enable restricted mode of mcan module. More...

void	mcan_enable_sleep_mode (struct mcan_module *const module_inst)
	enable sleep mode of mcan module. More...

void	mcan_enable_test_mode (struct mcan_module *const module_inst)
	enable test mode of mcan module. More...

void	mcan_fd_set_baudrate (Mcan *hw, uint32_t baudrate)
	Set MCAN_FD baudrate. More...

enum status_code	mcan_get_rx_buffer_element (struct mcan_module const module_inst, struct mcan_rx_element_buffer rx_element, uint32_t index)
	get dedicated rx buffer element . More...

enum status_code	mcan_get_rx_fifo_0_element (struct mcan_module const module_inst, struct mcan_rx_element_fifo_0 rx_element, uint32_t index)
	get FIFO rx buffer element . More...

enum status_code	mcan_get_rx_fifo_1_element (struct mcan_module const module_inst, struct mcan_rx_element_fifo_1 rx_element, uint32_t index)
	get FIFO rx buffer element . More...

enum status_code	mcan_get_tx_event_fifo_element (struct mcan_module const module_inst, struct mcan_tx_event_element tx_event_element, uint32_t index)
	set FIFO transmit buffer element . More...

void	mcan_init (struct mcan_module const module_inst, Mcan hw, struct mcan_config *config)
	initialize can module. More...

void	mcan_set_baudrate (Mcan *hw, uint32_t baudrate)
	Set MCAN baudrate. More...

enum status_code	mcan_set_rx_extended_filter (struct mcan_module const module_inst, struct mcan_extended_message_filter_element et_filter, uint32_t index)
	set extended receive CAN ID. More...

enum status_code	mcan_set_rx_standard_filter (struct mcan_module const module_inst, struct mcan_standard_message_filter_element sd_filter, uint32_t index)
	set standard receive CAN ID. More...

enum status_code	mcan_set_tx_buffer_element (struct mcan_module const module_inst, struct mcan_tx_element tx_element, uint32_t index)
	set dedicated transmit buffer element . More...

void	mcan_start (struct mcan_module *const module_inst)
	start can module after initialization. More...

void	mcan_stop (struct mcan_module *const module_inst)
	stop mcan module when bus off occurs More...

Variables
static struct mcan_rx_element_buffer	mcan0_rx_buffer [CONF_MCAN0_RX_BUFFER_NUM]

static struct mcan_extended_message_filter_element	mcan0_rx_extended_filter [CONF_MCAN0_RX_EXTENDED_ID_FILTER_NUM]

static struct mcan_rx_element_fifo_0	mcan0_rx_fifo_0 [CONF_MCAN0_RX_FIFO_0_NUM]

static struct mcan_rx_element_fifo_1	mcan0_rx_fifo_1 [CONF_MCAN0_RX_FIFO_1_NUM]

static struct mcan_standard_message_filter_element	mcan0_rx_standard_filter [CONF_MCAN0_RX_STANDARD_ID_FILTER_NUM]

static struct mcan_tx_element	mcan0_tx_buffer [CONF_MCAN0_TX_BUFFER_NUM+CONF_MCAN0_TX_FIFO_QUEUE_NUM]

static struct mcan_tx_event_element	mcan0_tx_event_fifo [CONF_MCAN0_TX_EVENT_FIFO]

static struct mcan_rx_element_buffer	mcan1_rx_buffer [CONF_MCAN1_RX_BUFFER_NUM]

static struct mcan_extended_message_filter_element	mcan1_rx_extended_filter [CONF_MCAN1_RX_EXTENDED_ID_FILTER_NUM]

static struct mcan_rx_element_fifo_0	mcan1_rx_fifo_0 [CONF_MCAN1_RX_FIFO_0_NUM]

static struct mcan_rx_element_fifo_1	mcan1_rx_fifo_1 [CONF_MCAN1_RX_FIFO_1_NUM]

static struct mcan_standard_message_filter_element	mcan1_rx_standard_filter [CONF_MCAN1_RX_STANDARD_ID_FILTER_NUM]

static struct mcan_tx_element	mcan1_tx_buffer [CONF_MCAN1_TX_BUFFER_NUM+CONF_MCAN1_TX_FIFO_QUEUE_NUM]

static struct mcan_tx_event_element	mcan1_tx_event_fifo [CONF_MCAN1_TX_EVENT_FIFO]

#define BIT_2_TO_15_MASK 0x0000fffc

Referenced by _mcan_message_memory_init().

#define PMC_PCK_5 5

Referenced by mcan_fd_set_baudrate(), mcan_init(), and mcan_set_baudrate().

static void _mcan_enable_peripheral_clock ( struct mcan_module *const module_inst )

static

enable can module clock.

Parameters

module_inst MCAN instance

References pmc_enable_periph_clk().

Referenced by mcan_disable_sleep_mode(), and mcan_init().

static void _mcan_message_memory_init ( Mcan * hw )

static

initialize MCAN memory .

Parameters

hw	Base address of the MCAN

The data size in conf_mcan.h should be 8/12/16/20/24/32/48/64, The corresponding setting value in register is 0/1//2/3/4/5/6/7. To simplify the calculation, seperate to two group 8/12/16/20/24 which increased with 4 and 32/48/64 which increased with 16.

References BIT_2_TO_15_MASK, mcan0_rx_buffer, mcan0_rx_extended_filter, mcan0_rx_fifo_0, mcan0_rx_fifo_1, mcan0_rx_standard_filter, mcan0_tx_buffer, mcan0_tx_event_fifo, mcan1_rx_buffer, mcan1_rx_extended_filter, mcan1_rx_fifo_0, mcan1_rx_fifo_1, mcan1_rx_standard_filter, mcan1_tx_buffer, and mcan1_tx_event_fifo.