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rt-thread-official/bsp/hpmicro/libraries/drivers/drv_mcan.c

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/*
* Copyright (c) 2023-2024 HPMicro
*
* SPDX-License-Identifier: BSD-3-Clause
*
* Change Logs:
* Date Author Notes
* 2023-04-07 HPMicro the first version
* 2023-05-31 HPMicro add MCAN4-MCAN7 support
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <rthw.h>
#include "board.h"
#include "hpm_mcan_drv.h"
#define CAN_SEND_WAIT_MS_MAX (1000U) /* CAN maximum wait time for transmission */
#define CAN_SENDBOX_NUM (1U) /* CAN Hardware Transmission buffer number */
#define CAN_STD_FILTER_NUM_MAX (128U) /* std Filter number */
#define CAN_EXT_FILTER_NUM_MAX (64U) /* ext Filter number */
#ifdef RT_USING_CAN
typedef struct _hpm_can_struct
{
MCAN_Type *can_base; /**< CAN Base address */
const char *name; /**< CAN device name */
int32_t irq_num; /**< CAN IRQ index */
uint32_t fifo_index; /**< FIFO index, it is a fake value to satisfy the driver framework */
mcan_config_t can_config; /**< CAN configuration for IP */
struct rt_can_device can_dev; /**< CAN device configuration in rt-thread */
uint32_t irq_txrx_err_enable_mask; /**< CAN TX and RX IRQ Enable Mask */
uint32_t std_filter_num; /**< std Filter number */
mcan_filter_elem_t std_can_filters[CAN_STD_FILTER_NUM_MAX];
uint32_t ext_filter_num; /**< ext Filter number */
mcan_filter_elem_t ext_can_filters[CAN_EXT_FILTER_NUM_MAX];
} hpm_can_t;
static const mcan_filter_elem_t k_default_std_id_filter = {
/* Use classic filter */
.filter_type = MCAN_FILTER_TYPE_CLASSIC_FILTER,
/* Store message into RXFIFO0 if matching */
.filter_config = MCAN_FILTER_ELEM_CFG_STORE_IN_RX_FIFO0_IF_MATCH,
/* For Standard Identify only */
.can_id_type = MCAN_CAN_ID_TYPE_STANDARD,
/* Sync Message, only evaluated when "CCCR.UTSU" is set */
.sync_message = 0U,
/* Don't care if mask is set to all 1s */
.filter_id = 0U,
/* Accept all messages */
.filter_mask = 0x7FFU,
};
static const mcan_filter_elem_t k_default_ext_id_filter = {
/* Use classic filter */
.filter_type = MCAN_FILTER_TYPE_CLASSIC_FILTER,
/* Store message into RXFIFO0 if matching */
.filter_config = MCAN_FILTER_ELEM_CFG_STORE_IN_RX_FIFO0_IF_MATCH,
/* For Standard Identify only */
.can_id_type = MCAN_CAN_ID_TYPE_EXTENDED,
/* Sync Message, only evaluated when "CCCR.UTSU" is set */
.sync_message = 0,
/* Don't care if mask is set to all 1s */
.filter_id = 0,
/* Accept all messages */
.filter_mask = 0x1FFFFFFFUL,
};
/**
* @brief Configure CAN controller
* @param [in/out] can CAN device pointer
* @param [in] cfg CAN configuration pointer
* @retval RT_EOK for valid configuration
* @retval -RT_ERROR for invalid configuration
*/
static rt_err_t hpm_mcan_configure(struct rt_can_device *can, struct can_configure *cfg);
/**
* @brief Control/Get CAN state
* including:interrupt, mode, priority, baudrate, filter, status
* @param [in/out] can CAN device pointer
* @param [in] cmd Control command
* @param [in/out] arg Argument pointer
* @retval RT_EOK for valid control command and arg
* @retval -RT_ERROR for invalid control command or arg
*/
static rt_err_t hpm_mcan_control(struct rt_can_device *can, int cmd, void *arg);
/**
* @brief Send out CAN message
* @param [in] can CAN device pointer
* @param [in] buf CAN message buffer
* @param [in] boxno Mailbox number, it is not used in this porting
* @retval RT_EOK No error
* @retval -RT_ETIMEOUT timeout happened
* @retval -RT_EFULL Transmission buffer is full
*/
static int hpm_mcan_sendmsg(struct rt_can_device *can, const void *buf, rt_uint32_t boxno);
/**
* @brief Receive message from CAN
* @param [in] can CAN device pointer
* @param [out] buf CAN receive buffer
* @param [in] boxno Mailbox Number, it is not used in this porting
* @retval RT_EOK no error
* @retval -RT_ERROR Error happened during reading receive FIFO
* @retval -RT_EMPTY no data in receive FIFO
*/
static int hpm_mcan_recvmsg(struct rt_can_device *can, void *buf, rt_uint32_t boxno);
/**
* @brief Common Interrupt Service routine
* @param [in] hpm_can HPM CAN pointer
*/
static void hpm_mcan_isr(hpm_can_t *hpm_can);
/**
* @brief Decode data bytes from DLC
* @param [in] dlc Data Length Code
* @return decoded data bytes
*/
static uint8_t can_get_data_bytes_from_dlc(uint32_t dlc);
#if defined(HPM_MCAN0_BASE) && defined(BSP_USING_MCAN0)
static hpm_can_t dev_can0 =
{
.can_base = HPM_MCAN0,
.name = "can0",
.irq_num = IRQn_MCAN0,
.fifo_index = 0,
};
void can0_isr(void)
{
hpm_mcan_isr(&dev_can0);
}
SDK_DECLARE_EXT_ISR_M(IRQn_MCAN0, can0_isr);
#endif
#if defined(HPM_MCAN1_BASE) && defined(BSP_USING_MCAN1)
static hpm_can_t dev_can1 =
{
.can_base = HPM_MCAN1,
.name = "can1",
.irq_num = IRQn_MCAN1,
.fifo_index = 1,
};
void can1_isr(void)
{
hpm_mcan_isr(&dev_can1);
}
SDK_DECLARE_EXT_ISR_M(IRQn_MCAN1, can1_isr);
#endif
#if defined(HPM_MCAN2_BASE) && defined(BSP_USING_MCAN2)
static hpm_can_t dev_can2 =
{
.can_base = HPM_MCAN2,
.name = "can2",
.irq_num = IRQn_MCAN2,
.fifo_index = 2,
};
void can2_isr(void)
{
hpm_mcan_isr(&dev_can2);
}
SDK_DECLARE_EXT_ISR_M(IRQn_MCAN2, can2_isr);
#endif
#if defined(HPM_MCAN3_BASE) && defined(BSP_USING_MCAN3)
static hpm_can_t dev_can3 =
{
.can_base = HPM_MCAN3,
.name = "can3",
.irq_num = IRQn_MCAN3,
.fifo_index = 3,
};
void can3_isr(void)
{
hpm_mcan_isr(&dev_can3);
}
SDK_DECLARE_EXT_ISR_M(IRQn_MCAN3, can3_isr);
#endif
#if defined(HPM_MCAN4_BASE) && defined(BSP_USING_MCAN4)
static hpm_can_t dev_can4 =
{
.can_base = HPM_MCAN4,
.name = "can4",
.irq_num = IRQn_MCAN4,
.fifo_index = 4,
};
void can4_isr(void)
{
hpm_mcan_isr(&dev_can4);
}
SDK_DECLARE_EXT_ISR_M(IRQn_MCAN4, can4_isr);
#endif
#if defined(HPM_MCAN5_BASE) && defined(BSP_USING_MCAN5)
static hpm_can_t dev_can5 =
{
.can_base = HPM_MCAN5,
.name = "can5",
.irq_num = IRQn_MCAN5,
.fifo_index = 5,
};
void can5_isr(void)
{
hpm_mcan_isr(&dev_can5);
}
SDK_DECLARE_EXT_ISR_M(IRQn_MCAN5, can5_isr);
#endif
#if defined(HPM_MCAN6_BASE) && defined(BSP_USING_MCAN6)
static hpm_can_t dev_can6 =
{
.can_base = HPM_MCAN6,
.name = "can6",
.irq_num = IRQn_MCAN6,
.fifo_index = 6,
};
void can6_isr(void)
{
hpm_mcan_isr(&dev_can6);
}
SDK_DECLARE_EXT_ISR_M(IRQn_MCAN6, can6_isr);
#endif
#if defined(HPM_MCAN7_BASE) && defined(BSP_USING_MCAN7)
static hpm_can_t dev_can7 =
{
.can_base = HPM_MCAN7,
.name = "can7",
.irq_num = IRQn_MCAN7,
.fifo_index = 7,
};
void can7_isr(void)
{
hpm_mcan_isr(&dev_can7);
}
SDK_DECLARE_EXT_ISR_M(IRQn_MCAN7, can7_isr);
#endif
static hpm_can_t *hpm_cans[] = {
#if defined(HPM_MCAN0_BASE) && defined(BSP_USING_MCAN0)
&dev_can0,
#endif
#if defined(HPM_MCAN1_BASE) && defined(BSP_USING_MCAN1)
&dev_can1,
#endif
#if defined(HPM_MCAN2_BASE) && defined(BSP_USING_MCAN2)
&dev_can2,
#endif
#if defined(HPM_MCAN3_BASE) && defined(BSP_USING_MCAN3)
&dev_can3,
#endif
#if defined(HPM_MCAN4_BASE) && defined(BSP_USING_MCAN4)
&dev_can4,
#endif
#if defined(HPM_MCAN5_BASE) && defined(BSP_USING_MCAN5)
&dev_can5,
#endif
#if defined(HPM_MCAN6_BASE) && defined(BSP_USING_MCAN6)
&dev_can6,
#endif
#if defined(HPM_MCAN7_BASE) && defined(BSP_USING_MCAN7)
&dev_can7,
#endif
};
static const struct rt_can_ops hpm_can_ops = {
.configure = hpm_mcan_configure,
.control = hpm_mcan_control,
.sendmsg = hpm_mcan_sendmsg,
.recvmsg = hpm_mcan_recvmsg,
};
static void hpm_mcan_isr(hpm_can_t *hpm_can)
{
uint8_t error_flags = mcan_get_last_error_code(hpm_can->can_base);
uint32_t flags = mcan_get_interrupt_flags(hpm_can->can_base);
mcan_error_count_t err_cnt;
/* Transmit completed */
if ((flags & (MCAN_EVENT_TRANSMIT)) != 0U) {
rt_hw_can_isr(&hpm_can->can_dev, RT_CAN_EVENT_TX_DONE | (0UL << 8));
}
/* Data available in FIFO */
if ((flags & MCAN_EVENT_RECEIVE) != 0)
{
rt_hw_can_isr(&hpm_can->can_dev, RT_CAN_EVENT_RX_IND | (hpm_can->fifo_index << 8));
}
/* RX FIFO overflow */
if ((flags & MCAN_INT_RXFIFO0_FULL) != 0U)
{
rt_hw_can_isr(&hpm_can->can_dev, RT_CAN_EVENT_RXOF_IND | (hpm_can->fifo_index << 8));
}
if ((flags & MCAN_INT_RXFIFO1_FULL) != 0U)
{
rt_hw_can_isr(&hpm_can->can_dev, RT_CAN_EVENT_RXOF_IND | (hpm_can->fifo_index << 8));
}
/* Error happened on CAN Bus */
if (((flags & MCAN_EVENT_ERROR) != 0U) || (error_flags != 0U))
{
mcan_get_error_counter(hpm_can->can_base, &err_cnt);
switch(error_flags)
{
case 3:
hpm_can->can_dev.status.ackerrcnt++;
break;
case 4:
hpm_can->can_dev.status.biterrcnt++;
break;
case 6:
hpm_can->can_dev.status.crcerrcnt++;
break;
case 2:
hpm_can->can_dev.status.formaterrcnt++;
break;
case 1:
hpm_can->can_dev.status.bitpaderrcnt++;
break;
}
hpm_can->can_dev.status.rcverrcnt = err_cnt.receive_error_count;
hpm_can->can_dev.status.snderrcnt = err_cnt.transmit_error_count;
hpm_can->can_dev.status.lasterrtype = mcan_get_last_error_code(hpm_can->can_base);
hpm_can->can_dev.status.errcode = 0;
if ((error_flags & MCAN_INT_WARNING_STATUS) != 0U)
{
hpm_can->can_dev.status.errcode |= ERRWARNING;
}
if ((error_flags & MCAN_INT_ERROR_PASSIVE) != 0U)
{
hpm_can->can_dev.status.errcode |= ERRPASSIVE;
}
if (mcan_is_in_busoff_state(hpm_can->can_base))
{
hpm_can->can_dev.status.errcode |= BUSOFF;
}
}
mcan_clear_interrupt_flags(hpm_can->can_base, flags);
}
static rt_err_t hpm_mcan_configure(struct rt_can_device *can, struct can_configure *cfg)
{
RT_ASSERT(can);
RT_ASSERT(cfg);
hpm_can_t *drv_can = (hpm_can_t*) can->parent.user_data;
RT_ASSERT(drv_can);
#ifdef RT_CAN_USING_CANFD
drv_can->can_config.enable_canfd = (cfg->enable_canfd != 0) ? true : false;
if (cfg->use_bit_timing != 0U)
{
drv_can->can_config.use_lowlevel_timing_setting = true;
drv_can->can_config.can_timing.prescaler = cfg->can_timing.prescaler;
drv_can->can_config.can_timing.num_seg1 = cfg->can_timing.num_seg1;
drv_can->can_config.can_timing.num_seg2 = cfg->can_timing.num_seg2;
drv_can->can_config.can_timing.num_sjw = cfg->can_timing.num_sjw;
drv_can->can_config.canfd_timing.prescaler = cfg->canfd_timing.prescaler;
drv_can->can_config.canfd_timing.num_seg1 = cfg->canfd_timing.num_seg1;
drv_can->can_config.canfd_timing.num_seg2 = cfg->canfd_timing.num_seg2;
drv_can->can_config.canfd_timing.num_sjw = cfg->canfd_timing.num_sjw;
}
else
#endif
{
drv_can->can_config.use_lowlevel_timing_setting = false;
drv_can->can_config.baudrate = cfg->baud_rate;
#ifdef RT_CAN_USING_CANFD
drv_can->can_config.baudrate_fd = cfg->baud_rate_fd;
#endif
}
switch (cfg->mode)
{
case RT_CAN_MODE_NORMAL:
drv_can->can_config.mode = mcan_mode_normal;
break;
case RT_CAN_MODE_LISTEN:
drv_can->can_config.mode = mcan_mode_listen_only;
break;
case RT_CAN_MODE_LOOPBACK:
drv_can->can_config.mode = mcan_mode_loopback_internal;
break;
default:
return -RT_ERROR;
break;
}
init_can_pins(drv_can->can_base);
uint32_t can_clk = board_init_can_clock(drv_can->can_base);
drv_can->can_config.all_filters_config.std_id_filter_list.filter_elem_list = &drv_can->std_can_filters[0];
drv_can->can_config.all_filters_config.std_id_filter_list.mcan_filter_elem_count = drv_can->std_filter_num;
drv_can->can_config.all_filters_config.ext_id_filter_list.filter_elem_list = &drv_can->ext_can_filters[0];
drv_can->can_config.all_filters_config.ext_id_filter_list.mcan_filter_elem_count = drv_can->ext_filter_num;
drv_can->can_config.all_filters_config.ext_id_mask = (1UL << 30) - 1UL;
drv_can->can_config.txbuf_trans_interrupt_mask = ~0UL;
hpm_stat_t status = mcan_init(drv_can->can_base, &drv_can->can_config, can_clk);
if (status != status_success)
{
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t hpm_mcan_control(struct rt_can_device *can, int cmd, void *arg)
{
RT_ASSERT(can);
hpm_can_t *drv_can = (hpm_can_t*) can->parent.user_data;
RT_ASSERT(drv_can);
uint32_t arg_val;
rt_err_t err = RT_EOK;
uint32_t temp;
uint32_t irq_txrx_mask;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
arg_val = (uint32_t) arg;
intc_m_disable_irq(drv_can->irq_num);
if (arg_val == RT_DEVICE_FLAG_INT_RX)
{
irq_txrx_mask = MCAN_EVENT_RECEIVE;
drv_can->irq_txrx_err_enable_mask &= ~irq_txrx_mask;
drv_can->can_config.interrupt_mask &= ~irq_txrx_mask;
mcan_disable_interrupts(drv_can->can_base, drv_can->irq_txrx_err_enable_mask);
}
else if (arg_val == RT_DEVICE_FLAG_INT_TX)
{
irq_txrx_mask = MCAN_EVENT_TRANSMIT;
drv_can->irq_txrx_err_enable_mask &= ~irq_txrx_mask;
drv_can->can_config.interrupt_mask &= ~irq_txrx_mask;
mcan_disable_interrupts(drv_can->can_base, drv_can->irq_txrx_err_enable_mask);
mcan_disable_txbuf_interrupt(drv_can->can_base, ~0UL);
} else if (arg_val == RT_DEVICE_CAN_INT_ERR) {
irq_txrx_mask = MCAN_EVENT_ERROR;
drv_can->irq_txrx_err_enable_mask &= ~irq_txrx_mask;
drv_can->can_config.interrupt_mask &= ~irq_txrx_mask;
mcan_disable_interrupts(drv_can->can_base, drv_can->irq_txrx_err_enable_mask);
} else {
err = -RT_ERROR;
}
break;
case RT_DEVICE_CTRL_SET_INT:
arg_val = (uint32_t) arg;
if (arg_val == RT_DEVICE_FLAG_INT_RX)
{
irq_txrx_mask = MCAN_EVENT_RECEIVE;
drv_can->irq_txrx_err_enable_mask |= irq_txrx_mask;
drv_can->can_config.interrupt_mask |= irq_txrx_mask;
mcan_enable_interrupts(drv_can->can_base, drv_can->irq_txrx_err_enable_mask);
intc_m_enable_irq_with_priority(drv_can->irq_num, 1);
}
else if (arg_val == RT_DEVICE_FLAG_INT_TX)
{
irq_txrx_mask = MCAN_EVENT_TRANSMIT;
drv_can->irq_txrx_err_enable_mask |= irq_txrx_mask;
drv_can->can_config.interrupt_mask |= irq_txrx_mask;
mcan_enable_interrupts(drv_can->can_base, drv_can->irq_txrx_err_enable_mask);
mcan_enable_txbuf_interrupt(drv_can->can_base, ~0UL);
intc_m_enable_irq_with_priority(drv_can->irq_num, 1);
}
else if (arg_val == RT_DEVICE_CAN_INT_ERR)
{
irq_txrx_mask = MCAN_EVENT_ERROR;
drv_can->irq_txrx_err_enable_mask |= irq_txrx_mask;
drv_can->can_config.interrupt_mask |= irq_txrx_mask;
mcan_enable_interrupts(drv_can->can_base, drv_can->irq_txrx_err_enable_mask);
intc_m_enable_irq_with_priority(drv_can->irq_num, 1);
}
else
{
err = -RT_ERROR;
}
break;
case RT_CAN_CMD_SET_FILTER:
{
/* Convert the RT-Thread Filter format to the filter format supported by HPM CAN */
struct rt_can_filter_config *filter = (struct rt_can_filter_config*)arg;
drv_can->std_filter_num = 0;
drv_can->ext_filter_num = 0;
if (filter != NULL)
{
for (uint32_t i = 0; i < filter->count; i++)
{
if (filter->items[i].ide != 0)
{
drv_can->ext_can_filters[drv_can->ext_filter_num].filter_type = MCAN_FILTER_TYPE_CLASSIC_FILTER;
drv_can->ext_can_filters[drv_can->ext_filter_num].filter_config = MCAN_FILTER_ELEM_CFG_STORE_IN_RX_FIFO0_IF_MATCH;
drv_can->ext_can_filters[drv_can->ext_filter_num].can_id_type = MCAN_CAN_ID_TYPE_EXTENDED;
drv_can->ext_can_filters[drv_can->ext_filter_num].filter_id = filter->items[i].id;
drv_can->ext_can_filters[drv_can->ext_filter_num].filter_mask = filter->items[i].mask;
drv_can->ext_filter_num++;
RT_ASSERT(drv_can->ext_filter_num <= CAN_EXT_FILTER_NUM_MAX);
}
else
{
drv_can->std_can_filters[drv_can->std_filter_num].filter_type = MCAN_FILTER_TYPE_CLASSIC_FILTER;
drv_can->std_can_filters[drv_can->std_filter_num].filter_config = MCAN_FILTER_ELEM_CFG_STORE_IN_RX_FIFO0_IF_MATCH;
drv_can->std_can_filters[drv_can->std_filter_num].can_id_type = MCAN_CAN_ID_TYPE_STANDARD;
drv_can->std_can_filters[drv_can->std_filter_num].filter_id = filter->items[i].id;
drv_can->std_can_filters[drv_can->std_filter_num].filter_mask = filter->items[i].mask;
drv_can->std_filter_num++;
RT_ASSERT(drv_can->std_filter_num <= CAN_STD_FILTER_NUM_MAX);
}
if (filter->items[i].rtr != 0)
{
if (drv_can->ext_filter_num)
{
drv_can->can_config.all_filters_config.global_filter_config.reject_remote_ext_frame = false;
}
else
{
drv_can->can_config.all_filters_config.global_filter_config.reject_remote_ext_frame = true;
}
if (drv_can->std_filter_num)
{
drv_can->can_config.all_filters_config.global_filter_config.reject_remote_std_frame = false;
}
else
{
drv_can->can_config.all_filters_config.global_filter_config.reject_remote_std_frame = true;
}
}
}
if (filter->actived != 0U)
{
drv_can->can_config.all_filters_config.global_filter_config.accept_non_matching_std_frame_option = MCAN_ACCEPT_NON_MATCHING_FRAME_OPTION_REJECT;
drv_can->can_config.all_filters_config.global_filter_config.accept_non_matching_ext_frame_option = MCAN_ACCEPT_NON_MATCHING_FRAME_OPTION_REJECT;
}
else
{
drv_can->can_config.all_filters_config.global_filter_config.accept_non_matching_std_frame_option = MCAN_ACCEPT_NON_MATCHING_FRAME_OPTION_IN_RXFIFO0;
drv_can->can_config.all_filters_config.global_filter_config.accept_non_matching_ext_frame_option = MCAN_ACCEPT_NON_MATCHING_FRAME_OPTION_IN_RXFIFO0;
}
}
else
{
drv_can->can_config.all_filters_config.global_filter_config.reject_remote_ext_frame = false;
drv_can->can_config.all_filters_config.global_filter_config.reject_remote_std_frame = false;
drv_can->can_config.all_filters_config.global_filter_config.accept_non_matching_std_frame_option = MCAN_ACCEPT_NON_MATCHING_FRAME_OPTION_IN_RXFIFO0;
drv_can->can_config.all_filters_config.global_filter_config.accept_non_matching_ext_frame_option = MCAN_ACCEPT_NON_MATCHING_FRAME_OPTION_IN_RXFIFO0;
drv_can->can_config.all_filters_config.ext_id_mask = 0x1FFFFFFFUL;
drv_can->can_config.all_filters_config.std_id_filter_list.filter_elem_list = &k_default_std_id_filter;
drv_can->can_config.all_filters_config.std_id_filter_list.mcan_filter_elem_count = 1;
drv_can->can_config.all_filters_config.ext_id_filter_list.filter_elem_list = &k_default_ext_id_filter;
drv_can->can_config.all_filters_config.ext_id_filter_list.mcan_filter_elem_count = 1;
}
err = hpm_mcan_configure(can, &drv_can->can_dev.config);
#ifdef RT_CAN_USING_HDR
if (filter == RT_NULL) {
/*if use RT_CAN_USING_HDR, but if want to receive everything without filtering, use default filter, need to return NO-RT-OK status*/
err = -RT_ETRAP;
}
#endif
}
break;
case RT_CAN_CMD_SET_MODE:
arg_val = (uint32_t) arg;
if ((arg_val != RT_CAN_MODE_NORMAL) && (arg_val != RT_CAN_MODE_LISTEN) && (arg_val != RT_CAN_MODE_LOOPBACK))
{
err = -RT_ERROR;
break;
}
if (arg_val != drv_can->can_dev.config.mode)
{
drv_can->can_dev.config.mode = arg_val;
err = hpm_mcan_configure(can, &drv_can->can_dev.config);
}
break;
case RT_CAN_CMD_SET_BAUD:
arg_val = (uint32_t) arg;
if (arg_val != drv_can->can_dev.config.baud_rate)
{
drv_can->can_dev.config.baud_rate = arg_val;
}
err = hpm_mcan_configure(can, &drv_can->can_dev.config);
break;
#ifdef RT_CAN_USING_CANFD
case RT_CAN_CMD_SET_CANFD:
arg_val = (uint32_t) arg;
if (arg_val != drv_can->can_dev.config.enable_canfd)
{
drv_can->can_dev.config.enable_canfd = arg_val;
err = hpm_mcan_configure(can, &drv_can->can_dev.config);
}
break;
case RT_CAN_CMD_SET_BAUD_FD:
arg_val = (uint32_t) arg;
if (arg_val != drv_can->can_dev.config.baud_rate_fd)
{
drv_can->can_dev.config.baud_rate_fd = arg_val;
err = hpm_mcan_configure(can, &drv_can->can_dev.config);
}
break;
case RT_CAN_CMD_SET_BITTIMING:
{
struct rt_can_bit_timing_config *timing_configs = (struct rt_can_bit_timing_config*)arg;
if ((timing_configs == RT_NULL) || (timing_configs->count < 1) || (timing_configs->count > 2))
{
return -RT_ERROR;
}
if (timing_configs->count != 0U)
{
drv_can->can_dev.config.can_timing = timing_configs->items[0];
}
if (timing_configs->count == 2)
{
drv_can->can_dev.config.canfd_timing = timing_configs->items[1];
}
err = hpm_mcan_configure(can, &drv_can->can_dev.config);
}
break;
#endif
case RT_CAN_CMD_SET_PRIV:
arg_val = (uint32_t)arg;
if ((arg_val != RT_CAN_MODE_PRIV) && (arg_val != RT_CAN_MODE_NOPRIV))
{
return -RT_ERROR;
}
if (arg_val != drv_can->can_dev.config.privmode)
{
drv_can->can_dev.config.privmode = arg_val;
err = hpm_mcan_configure(can, &drv_can->can_dev.config);
}
break;
case RT_CAN_CMD_GET_STATUS:
mcan_error_count_t err_cnt;
mcan_get_error_counter(drv_can->can_base, &err_cnt);
drv_can->can_dev.status.rcverrcnt = err_cnt.receive_error_count;
drv_can->can_dev.status.snderrcnt = err_cnt.transmit_error_count;
drv_can->can_dev.status.lasterrtype = mcan_get_last_error_code(drv_can->can_base);
temp = mcan_get_interrupt_flags(drv_can->can_base);
drv_can->can_dev.status.errcode = 0;
if ((temp & MCAN_INT_WARNING_STATUS) != 0U)
{
drv_can->can_dev.status.errcode |= ERRWARNING;
}
if ((temp & MCAN_INT_ERROR_PASSIVE) != 0U)
{
drv_can->can_dev.status.errcode |= ERRPASSIVE;
}
if (mcan_is_in_busoff_state(drv_can->can_base))
{
drv_can->can_dev.status.errcode |= BUSOFF;
}
rt_memcpy(arg, &drv_can->can_dev.status, sizeof(drv_can->can_dev.status));
break;
}
return err;
}
static int hpm_mcan_sendmsg(struct rt_can_device *can, const void *buf, rt_uint32_t boxno)
{
RT_ASSERT(can);
hpm_can_t *drv_can = (hpm_can_t*) can->parent.user_data;
RT_ASSERT(drv_can);
struct rt_can_msg *can_msg = (struct rt_can_msg *) buf;
mcan_tx_frame_t tx_frame = {0};
memset(&tx_frame, 0, sizeof(tx_frame));
if (can_msg->ide == RT_CAN_STDID)
{
tx_frame.use_ext_id = 0;
tx_frame.std_id = can_msg->id;
}
else
{
tx_frame.use_ext_id = 1;
tx_frame.ext_id = can_msg->id;
}
if (can_msg->rtr == RT_CAN_DTR)
{
tx_frame.rtr = false;
}
else
{
tx_frame.rtr = true;
}
#ifdef RT_CAN_USING_CANFD
tx_frame.bitrate_switch = can_msg->brs;
if (can_msg->fd_frame != 0)
{
tx_frame.canfd_frame = 1;
RT_ASSERT(can_msg->len <= 15);
}
else
#endif
{
RT_ASSERT(can_msg->len <= 8);
}
uint32_t msg_len = mcan_get_message_size_from_dlc(can_msg->len);
for (uint32_t i = 0; i < msg_len; i++)
{
tx_frame.data_8[i] = can_msg->data[i];
}
tx_frame.dlc = can_msg->len;
uint32_t delay_cnt = 0;
while (mcan_is_txfifo_full(drv_can->can_base))
{
rt_thread_mdelay(1);
delay_cnt++;
if (delay_cnt >= CAN_SEND_WAIT_MS_MAX)
{
return -RT_ETIMEOUT;
}
}
hpm_stat_t status = mcan_transmit_via_txbuf_nonblocking(drv_can->can_base, 0, &tx_frame);
if (status != status_success)
{
return -RT_EFULL;
}
return RT_EOK;
}
static int hpm_mcan_recvmsg(struct rt_can_device *can, void *buf, rt_uint32_t boxno)
{
RT_ASSERT(can);
hpm_can_t *drv_can = (hpm_can_t*) can->parent.user_data;
RT_ASSERT(drv_can);
rt_can_msg_t can_msg = (rt_can_msg_t)buf;
mcan_rx_message_t rx_buf;
hpm_stat_t status = mcan_read_rxfifo(drv_can->can_base, 0, &rx_buf);
if (status == status_success)
{
if (rx_buf.use_ext_id)
{
can_msg->ide = RT_CAN_EXTID;
can_msg->id = rx_buf.ext_id;
}
else
{
can_msg->ide = RT_CAN_STDID;
can_msg->id = rx_buf.std_id;
}
if (rx_buf.rtr != 0) {
can_msg->rtr = RT_CAN_RTR;
}
else {
can_msg->rtr = RT_CAN_DTR;
}
#ifdef RT_CAN_USING_CANFD
can_msg->fd_frame = rx_buf.canfd_frame;
can_msg->brs = rx_buf.bitrate_switch;
#endif
can_msg->len = rx_buf.dlc;
uint32_t msg_len = mcan_get_message_size_from_dlc(can_msg->len);
for(uint32_t i = 0; i < msg_len; i++) {
can_msg->data[i] = rx_buf.data_8[i];
}
#ifdef RT_CAN_USING_HDR
/* Hardware filter messages are valid */
can_msg->hdr_index = boxno;
can->hdr[can_msg->hdr_index].connected = 1;
#endif
}
else
{
return -RT_EEMPTY;
}
return RT_EOK;
}
int rt_hw_mcan_init(void)
{
struct can_configure config = CANDEFAULTCONFIG;
config.privmode = RT_CAN_MODE_NOPRIV;
config.sndboxnumber = CAN_SENDBOX_NUM;
config.ticks = 50;
#ifdef RT_CAN_USING_HDR
config.maxhdr = 32;
#endif
for (uint32_t i = 0; i < ARRAY_SIZE(hpm_cans); i++)
{
hpm_cans[i]->can_dev.config = config;
hpm_cans[i]->ext_filter_num = 0;
hpm_cans[i]->std_filter_num = 0;
mcan_get_default_config(hpm_cans[i]->can_base, &hpm_cans[i]->can_config);
rt_hw_can_register(&hpm_cans[i]->can_dev, hpm_cans[i]->name, &hpm_can_ops, hpm_cans[i]);
}
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_hw_mcan_init);
#endif
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