/*
 * Copyright (c) 2022 Talkweb Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <string.h>
#include <stdio.h>
#include <los_interrupt.h>
#include "stm32f4xx_hal.h"

CAN_HandleTypeDef hcan1;

void MX_CAN1_Init(void)
{
    hcan1.Instance = CAN1;
    hcan1.Init.Prescaler = 12;
    hcan1.Init.Mode = CAN_MODE_NORMAL;
    hcan1.Init.SyncJumpWidth = CAN_SJW_1TQ;
    hcan1.Init.TimeSeg1 = CAN_BS1_6TQ;
    hcan1.Init.TimeSeg2 = CAN_BS2_7TQ;
    hcan1.Init.TimeTriggeredMode = DISABLE;
    hcan1.Init.AutoBusOff = DISABLE;
    hcan1.Init.AutoWakeUp = DISABLE;
    hcan1.Init.AutoRetransmission = DISABLE;
    hcan1.Init.ReceiveFifoLocked = DISABLE;
    hcan1.Init.TransmitFifoPriority = DISABLE;
    if (HAL_CAN_Init(&hcan1) != HAL_OK) {
    Error_Handler();
    }
}


static void can_receive_irq(void)
{
    printf("can irq\n");
    HAL_CAN_IRQHandler(&hcan1);
}

/**
* @brief CAN MSP Initialization
* This function configures the hardware resources used in this example
* @param hcan: CAN handle pointer
* @retval None
*/
void HAL_CAN_MspInit(CAN_HandleTypeDef* hcan)
{
    GPIO_InitTypeDef GPIO_InitStruct = {0};
    if (hcan->Instance==CAN1) {
    /* Peripheral clock enable */
    __HAL_RCC_CAN1_CLK_ENABLE();

    __HAL_RCC_GPIOI_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
    /**CAN1 GPIO Configuration
    PI9     ------> CAN1_RX
    PB9     ------> CAN1_TX
    */
    GPIO_InitStruct.Pin = GPIO_PIN_9;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF9_CAN1;
    HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_9;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF9_CAN1;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

    LOS_HwiCreate(CAN1_RX0_IRQn, 0, 0, (HWI_PROC_FUNC)can_receive_irq, 0);
    }
}

/**
* @brief CAN MSP De-Initialization
* This function freeze the hardware resources used in this example
* @param hcan: CAN handle pointer
* @retval None
*/
void HAL_CAN_MspDeInit(CAN_HandleTypeDef* hcan)
{
    if (hcan->Instance==CAN1) {
    /* Peripheral clock disable */
    __HAL_RCC_CAN1_CLK_DISABLE();
    /**CAN1 GPIO Configuration
    PI9     ------> CAN1_RX
    PB9     ------> CAN1_TX
    */
    HAL_GPIO_DeInit(GPIOI, GPIO_PIN_9);
    HAL_GPIO_DeInit(GPIOB, GPIO_PIN_9);
    }
}