566 lines
16 KiB
C
566 lines
16 KiB
C
/*
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* Copyright (c) 2006-2022, Synwit Technology Co.,Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2022-02-16 lik first version
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*/
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#include "drv_can.h"
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#ifdef RT_USING_CAN
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#ifdef BSP_USING_CAN
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//#define DRV_DEBUG
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#define LOG_TAG "drv.can"
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#include <drv_log.h>
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#if !defined(BSP_USING_CAN0) && !defined(BSP_USING_CAN1)
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#error "Please define at least one BSP_USING_CANx"
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/* this driver can be disabled at menuconfig ? RT-Thread Components ? Device Drivers */
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#endif
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#ifdef BSP_USING_CAN0
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#ifndef CAN0_CFG
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#define CAN0_CFG \
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{ \
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.name = "can0", \
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.CANx = CAN0, \
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}
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#endif /* CAN0_CFG */
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#endif /* BSP_USING_CAN0 */
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#ifdef BSP_USING_CAN1
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#ifndef CAN1_CFG
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#define CAN1_CFG \
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{ \
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.name = "can1", \
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.CANx = CAN1, \
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}
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#endif /* CAN1_CFG */
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#endif /* BSP_USING_CAN1 */
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#define PRESCL_Pos 0
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#define BS1_Pos 16
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#define BS2_Pos 20
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#define SJW_Pos 24
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#define PRESCL_Msk (0x3FF << PRESCL_Pos)
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#define BS1_Msk ((0x0F) << BS1_Pos)
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#define BS2_Msk ((0x07) << BS2_Pos)
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#define SJW_Msk (0x3 << SJW_Pos)
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struct swm_baud_rate_tab
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{
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rt_uint32_t baud_rate;
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rt_uint32_t config_data;
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};
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#define BAUD_DATA(TYPE, NO) ((can_baud_rate_tab[NO].config_data & TYPE##_Msk) >> TYPE##_Pos)
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struct swm_can_cfg
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{
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const char *name;
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CAN_TypeDef *CANx;
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CAN_InitStructure CAN_initstruct;
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};
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struct swm_can_device
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{
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struct swm_can_cfg *can_cfg;
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struct rt_can_device can_device;
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};
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/* SystemCoreClock 152MHz(max) 150MHz不能生成CAN1MBaud */
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static const struct swm_baud_rate_tab can_baud_rate_tab[] =
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{
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{CAN1MBaud, ((CAN_SJW_4tq << SJW_Pos) | (CAN_BS1_12tq << BS1_Pos) | (CAN_BS2_6tq << BS2_Pos) | (1 << PRESCL_Pos))},
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{CAN500kBaud, ((CAN_SJW_4tq << SJW_Pos) | (CAN_BS1_12tq << BS1_Pos) | (CAN_BS2_6tq << BS2_Pos) | (3 << PRESCL_Pos))},
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{CAN250kBaud, ((CAN_SJW_4tq << SJW_Pos) | (CAN_BS1_12tq << BS1_Pos) | (CAN_BS2_6tq << BS2_Pos) | (7 << PRESCL_Pos))},
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{CAN125kBaud, ((CAN_SJW_4tq << SJW_Pos) | (CAN_BS1_12tq << BS1_Pos) | (CAN_BS2_6tq << BS2_Pos) | (15 << PRESCL_Pos))},
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{CAN100kBaud, ((CAN_SJW_4tq << SJW_Pos) | (CAN_BS1_12tq << BS1_Pos) | (CAN_BS2_6tq << BS2_Pos) | (19 << PRESCL_Pos))},
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{CAN50kBaud, ((CAN_SJW_4tq << SJW_Pos) | (CAN_BS1_12tq << BS1_Pos) | (CAN_BS2_6tq << BS2_Pos) | (39 << PRESCL_Pos))},
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{CAN20kBaud, ((CAN_SJW_4tq << SJW_Pos) | (CAN_BS1_12tq << BS1_Pos) | (CAN_BS2_6tq << BS2_Pos) | (99 << PRESCL_Pos))},
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{CAN10kBaud, ((CAN_SJW_4tq << SJW_Pos) | (CAN_BS1_12tq << BS1_Pos) | (CAN_BS2_6tq << BS2_Pos) | (199 << PRESCL_Pos))}};
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enum
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{
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#ifdef BSP_USING_CAN0
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CAN0_INDEX,
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#endif
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#ifdef BSP_USING_CAN1
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CAN1_INDEX,
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#endif
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};
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static struct swm_can_cfg swm_can_cfg[] =
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{
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#ifdef BSP_USING_CAN0
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CAN0_CFG,
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#endif
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#ifdef BSP_USING_CAN1
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CAN1_CFG,
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#endif
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};
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static struct swm_can_device can_obj[sizeof(swm_can_cfg) / sizeof(swm_can_cfg[0])];
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static rt_uint32_t get_can_baud_index(rt_uint32_t baud)
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{
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rt_uint32_t len, index;
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len = sizeof(can_baud_rate_tab) / sizeof(can_baud_rate_tab[0]);
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for (index = 0; index < len; index++)
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{
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if (can_baud_rate_tab[index].baud_rate == baud)
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return index;
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}
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return 0; /* default baud is CAN1MBaud */
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}
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static rt_err_t swm_can_config(struct rt_can_device *can_device, struct can_configure *cfg)
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{
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struct swm_can_device *can_dev;
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rt_uint32_t baud_index;
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rt_uint32_t can_mode;
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RT_ASSERT(can_device);
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RT_ASSERT(cfg);
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can_dev = (struct swm_can_device *)can_device->parent.user_data;
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RT_ASSERT(can_dev);
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switch (cfg->mode)
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{
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case RT_CAN_MODE_NORMAL:
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can_mode = CAN_MODE_NORMAL;
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break;
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case RT_CAN_MODE_LISEN:
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can_mode = CAN_MODE_LISTEN;
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break;
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case RT_CAN_MODE_LOOPBACK:
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can_mode = CAN_MODE_SELFTEST;
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break;
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case RT_CAN_MODE_LOOPBACKANLISEN:
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can_mode = CAN_MODE_SELFTEST;
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break;
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}
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baud_index = get_can_baud_index(cfg->baud_rate);
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CAN_Close(can_dev->can_cfg->CANx); //一些关键寄存器只能在CAN关闭时设置
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can_dev->can_cfg->CANx->CR &= ~(CAN_CR_LOM_Msk | CAN_CR_STM_Msk);
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can_dev->can_cfg->CANx->CR |= (can_mode << CAN_CR_LOM_Pos);
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can_dev->can_cfg->CANx->BT1 = (0 << CAN_BT1_SAM_Pos) |
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(BAUD_DATA(BS1, baud_index) << CAN_BT1_TSEG1_Pos) |
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(BAUD_DATA(BS2, baud_index) << CAN_BT1_TSEG2_Pos);
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can_dev->can_cfg->CANx->BT0 = (BAUD_DATA(SJW, baud_index) << CAN_BT0_SJW_Pos) |
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((BAUD_DATA(PRESCL, baud_index) & 0x3F) << CAN_BT0_BRP_Pos);
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can_dev->can_cfg->CANx->BT2 = ((BAUD_DATA(PRESCL, baud_index) >> 6) << CAN_BT2_BRP_Pos);
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can_dev->can_cfg->CANx->RXERR = 0; //只能在复位模式下清除
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can_dev->can_cfg->CANx->TXERR = 0;
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/* can start */
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CAN_Open(can_dev->can_cfg->CANx);
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return RT_EOK;
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}
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static rt_err_t swm_can_control(struct rt_can_device *can_device, int cmd, void *arg)
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{
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rt_uint32_t argval;
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struct swm_can_device *can_dev;
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struct rt_can_filter_config *filter_cfg;
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RT_ASSERT(can_device != RT_NULL);
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can_dev = (struct swm_can_device *)can_device->parent.user_data;
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RT_ASSERT(can_dev != RT_NULL);
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switch (cmd)
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{
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case RT_DEVICE_CTRL_CLR_INT:
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argval = (rt_uint32_t)arg;
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if (argval == RT_DEVICE_FLAG_INT_RX)
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{
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can_dev->can_cfg->CANx->IE &= ~(CAN_IE_RXDA_Msk | CAN_IE_RXOV_Msk);
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}
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else if (argval == RT_DEVICE_FLAG_INT_TX)
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{
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can_dev->can_cfg->CANx->IE &= ~CAN_IE_TXBR_Msk;
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}
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else if (argval == RT_DEVICE_CAN_INT_ERR)
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{
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can_dev->can_cfg->CANx->IE &= ~(CAN_IE_ARBLOST_Msk | CAN_IE_BUSERR_Msk | CAN_IE_ERRWARN_Msk | CAN_IE_ERRPASS_Msk);
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}
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break;
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case RT_DEVICE_CTRL_SET_INT:
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argval = (rt_uint32_t)arg;
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if (argval == RT_DEVICE_FLAG_INT_RX)
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{
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can_dev->can_cfg->CANx->IE |= (CAN_IE_RXDA_Msk | CAN_IE_RXOV_Msk);
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}
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else if (argval == RT_DEVICE_FLAG_INT_TX)
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{
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can_dev->can_cfg->CANx->IE |= CAN_IE_TXBR_Msk;
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}
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else if (argval == RT_DEVICE_CAN_INT_ERR)
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{
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can_dev->can_cfg->CANx->IE |= (CAN_IE_ARBLOST_Msk | CAN_IE_BUSERR_Msk | CAN_IE_ERRWARN_Msk | CAN_IE_ERRPASS_Msk);
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}
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break;
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case RT_CAN_CMD_SET_FILTER:
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{
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rt_uint32_t filter_idx = 0;
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if (RT_NULL == arg)
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{
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/* default filter config */
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}
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else
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{
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filter_cfg = (struct rt_can_filter_config *)arg;
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/* get default filter */
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for (int i = 0; i < filter_cfg->count; i++)
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{
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if (filter_cfg->items[i].hdr == -1)
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{
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filter_idx = i;
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}
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else
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{
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filter_idx = filter_cfg->items[i].hdr;
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}
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if (filter_cfg->items[i].ide == RT_CAN_STDID)
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{
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can_dev->can_cfg->CANx->AFM &= ~(1 << filter_idx);
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can_dev->can_cfg->CANx->ACR[filter_idx] = __REV(filter_cfg->items[i].id << 5);
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can_dev->can_cfg->CANx->AMR[filter_idx] = __REV(~(filter_cfg->items[i].mask << 5));
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can_dev->can_cfg->CANx->AFE |= (1 << filter_idx);
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}
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else if (filter_cfg->items[i].ide == RT_CAN_EXTID)
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{
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can_dev->can_cfg->CANx->AFM |= (1 << filter_idx);
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can_dev->can_cfg->CANx->ACR[filter_idx] = __REV(filter_cfg->items[i].id << 3);
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can_dev->can_cfg->CANx->AMR[filter_idx] = __REV(~(filter_cfg->items[i].mask << 3));
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can_dev->can_cfg->CANx->AFE |= (1 << filter_idx);
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}
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}
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}
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break;
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}
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case RT_CAN_CMD_SET_MODE:
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argval = (rt_uint32_t)arg;
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if (argval != RT_CAN_MODE_NORMAL &&
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argval != RT_CAN_MODE_LISEN &&
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argval != RT_CAN_MODE_LOOPBACK &&
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argval != RT_CAN_MODE_LOOPBACKANLISEN)
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{
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return -RT_ERROR;
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}
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if (argval != can_dev->can_device.config.mode)
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{
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can_dev->can_device.config.mode = argval;
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return swm_can_config(&can_dev->can_device, &can_dev->can_device.config);
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}
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break;
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case RT_CAN_CMD_SET_BAUD:
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argval = (rt_uint32_t)arg;
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if (argval != CAN1MBaud &&
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argval != CAN800kBaud &&
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argval != CAN500kBaud &&
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argval != CAN250kBaud &&
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argval != CAN125kBaud &&
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argval != CAN100kBaud &&
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argval != CAN50kBaud &&
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argval != CAN20kBaud &&
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argval != CAN10kBaud)
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{
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return -RT_ERROR;
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}
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if (argval != can_dev->can_device.config.baud_rate)
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{
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can_dev->can_device.config.baud_rate = argval;
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return swm_can_config(&can_dev->can_device, &can_dev->can_device.config);
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}
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break;
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case RT_CAN_CMD_SET_PRIV:
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argval = (rt_uint32_t)arg;
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if (argval != RT_CAN_MODE_PRIV &&
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argval != RT_CAN_MODE_NOPRIV)
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{
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return -RT_ERROR;
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}
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if (argval != can_dev->can_device.config.privmode)
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{
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can_dev->can_device.config.privmode = argval;
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return swm_can_config(&can_dev->can_device, &can_dev->can_device.config);
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}
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break;
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case RT_CAN_CMD_GET_STATUS:
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{
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can_dev->can_device.status.rcverrcnt = can_dev->can_cfg->CANx->RXERR;
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can_dev->can_device.status.snderrcnt = can_dev->can_cfg->CANx->TXERR;
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can_dev->can_device.status.lasterrtype = (can_dev->can_cfg->CANx->ECC >> 6) & 0x03;
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can_dev->can_device.status.errcode = can_dev->can_cfg->CANx->ECC & 0x1F;
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rt_memcpy(arg, &can_dev->can_device.status, sizeof(can_dev->can_device.status));
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}
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break;
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}
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return RT_EOK;
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}
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static int swm_can_sendmsg(struct rt_can_device *can_device, const void *buf, rt_uint32_t box_num)
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{
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uint32_t i;
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struct swm_can_device *can_dev;
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RT_ASSERT(can_device != RT_NULL);
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can_dev = (struct swm_can_device *)can_device->parent.user_data;
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struct rt_can_msg *pmsg = (struct rt_can_msg *) buf;
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if (RT_CAN_STDID == pmsg->ide)
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{
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can_dev->can_cfg->CANx->FRAME.DATA[0] = pmsg->id >> 3;
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can_dev->can_cfg->CANx->FRAME.DATA[1] = pmsg->id << 5;
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if (RT_CAN_DTR == pmsg->rtr)
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{
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can_dev->can_cfg->CANx->FRAME.INFO = (0 << CAN_INFO_FF_Pos) |
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(0 << CAN_INFO_RTR_Pos) |
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(pmsg->len << CAN_INFO_DLC_Pos);
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for(i = 0; i < pmsg->len; i++)
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{
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can_dev->can_cfg->CANx->FRAME.DATA[i+2] = pmsg->data[i];
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}
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if(can_dev->can_cfg->CANx->CR & CAN_CR_STM_Msk)
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{
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can_dev->can_cfg->CANx->CMD = (1 << CAN_CMD_SRR_Pos);
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}
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else
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{
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can_dev->can_cfg->CANx->CMD = (1 << CAN_CMD_TXREQ_Pos);
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}
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}
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else
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{
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can_dev->can_cfg->CANx->FRAME.INFO = (0 << CAN_INFO_FF_Pos) |
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(1 << CAN_INFO_RTR_Pos) |
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(0 << CAN_INFO_DLC_Pos);
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can_dev->can_cfg->CANx->CMD = (1 << CAN_CMD_TXREQ_Pos);
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}
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}
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else
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{
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can_dev->can_cfg->CANx->FRAME.DATA[0] = pmsg->id >> 21;
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can_dev->can_cfg->CANx->FRAME.DATA[1] = pmsg->id >> 13;
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can_dev->can_cfg->CANx->FRAME.DATA[2] = pmsg->id >> 5;
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can_dev->can_cfg->CANx->FRAME.DATA[3] = pmsg->id << 3;
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if (RT_CAN_DTR == pmsg->rtr)
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{
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can_dev->can_cfg->CANx->FRAME.INFO = (1 << CAN_INFO_FF_Pos) |
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(0 << CAN_INFO_RTR_Pos) |
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(pmsg->len << CAN_INFO_DLC_Pos);
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for(i = 0; i < pmsg->len; i++)
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{
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can_dev->can_cfg->CANx->FRAME.DATA[i+4] = pmsg->data[i];
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}
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if(can_dev->can_cfg->CANx->CR & CAN_CR_STM_Msk)
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{
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can_dev->can_cfg->CANx->CMD = (1 << CAN_CMD_SRR_Pos);
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}
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else
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{
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can_dev->can_cfg->CANx->CMD = (1 << CAN_CMD_TXREQ_Pos);
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}
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}
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else
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{
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can_dev->can_cfg->CANx->FRAME.INFO = (1 << CAN_INFO_FF_Pos) |
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(1 << CAN_INFO_RTR_Pos) |
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(0 << CAN_INFO_DLC_Pos);
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can_dev->can_cfg->CANx->CMD = (1 << CAN_CMD_TXREQ_Pos);
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}
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}
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return RT_EOK;
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}
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static int swm_can_recvmsg(struct rt_can_device *can_device, void *buf, rt_uint32_t fifo)
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{
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uint32_t i;
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struct swm_can_device *can_dev;
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RT_ASSERT(can_device != RT_NULL);
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can_dev = (struct swm_can_device *)can_device->parent.user_data;
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struct rt_can_msg *pmsg = (struct rt_can_msg *) buf;
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CAN_RXMessage CAN_RXMsg;
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/* get data */
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CAN_Receive(can_dev->can_cfg->CANx, &CAN_RXMsg);
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/* get id */
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if (CAN_RXMsg.format == CAN_FRAME_STD)
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{
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pmsg->ide = RT_CAN_STDID;
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}
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else
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{
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pmsg->ide = RT_CAN_EXTID;
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}
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pmsg->id = CAN_RXMsg.id;
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/* get type */
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if (CAN_RXMsg.remote == 0)
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{
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pmsg->rtr = RT_CAN_DTR;
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}
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else
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{
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pmsg->rtr = RT_CAN_RTR;
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}
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/* get len */
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pmsg->len = CAN_RXMsg.size;
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for(i = 0; i < pmsg->len; i++)
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{
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pmsg->data[i] = CAN_RXMsg.data[i];
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}
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return RT_EOK;
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}
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static const struct rt_can_ops swm_can_ops =
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{
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.configure = swm_can_config,
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.control = swm_can_control,
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.sendmsg = swm_can_sendmsg,
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.recvmsg = swm_can_recvmsg,
|
|
};
|
|
|
|
static void swm_can_isr(struct rt_can_device *can_device)
|
|
{
|
|
struct swm_can_device *can_dev;
|
|
RT_ASSERT(can_device != RT_NULL);
|
|
can_dev = (struct swm_can_device *)can_device->parent.user_data;
|
|
|
|
uint32_t int_sr = CAN_INTStat(can_dev->can_cfg->CANx);
|
|
|
|
if(int_sr & CAN_IF_RXDA_Msk)
|
|
{
|
|
rt_hw_can_isr(can_device, RT_CAN_EVENT_RX_IND);
|
|
}
|
|
else if (int_sr & CAN_IF_RXOV_Msk)
|
|
{
|
|
rt_hw_can_isr(can_device, RT_CAN_EVENT_RXOF_IND);
|
|
}
|
|
else if (int_sr & CAN_IF_TXBR_Msk)
|
|
{
|
|
rt_hw_can_isr(can_device, RT_CAN_EVENT_TX_DONE);
|
|
}
|
|
else if (int_sr & CAN_IE_ERRWARN_Msk)
|
|
{
|
|
}
|
|
else if (int_sr & CAN_IE_ERRPASS_Msk)
|
|
{
|
|
}
|
|
else if (int_sr & CAN_IE_ARBLOST_Msk)
|
|
{
|
|
}
|
|
else if (int_sr & CAN_IE_BUSERR_Msk)
|
|
{
|
|
}
|
|
}
|
|
|
|
#ifdef BSP_USING_CAN0
|
|
/**
|
|
* @brief This function handles CAN0 interrupts.
|
|
*/
|
|
void CAN0_Handler(void)
|
|
{
|
|
rt_interrupt_enter();
|
|
swm_can_isr(&(can_obj[CAN0_INDEX].can_device));
|
|
rt_interrupt_leave();
|
|
}
|
|
#endif /* BSP_USING_CAN0 */
|
|
|
|
#ifdef BSP_USING_CAN1
|
|
/**
|
|
* @brief This function handles CAN1 interrupts.
|
|
*/
|
|
void CAN1_Handler(void)
|
|
{
|
|
rt_interrupt_enter();
|
|
swm_can_isr(&(can_obj[CAN0_INDEX].can_device));
|
|
rt_interrupt_leave();
|
|
}
|
|
#endif /* BSP_USING_CAN1 */
|
|
|
|
int swm_can_init(void)
|
|
{
|
|
int i = 0;
|
|
int result = RT_EOK;
|
|
|
|
struct can_configure config = CANDEFAULTCONFIG;
|
|
config.privmode = RT_CAN_MODE_NOPRIV;
|
|
config.ticks = 50;
|
|
#ifdef RT_CAN_USING_HDR
|
|
config.maxhdr = 16;
|
|
#endif
|
|
|
|
#ifdef BSP_USING_CAN0
|
|
PORT_Init(PORTB, PIN5, PORTB_PIN5_CAN0_RX, 1);
|
|
PORT_Init(PORTB, PIN4, PORTB_PIN4_CAN0_TX, 0);
|
|
SYS->CLKEN0 |= (0x01 << SYS_CLKEN0_CAN0_Pos);
|
|
NVIC_EnableIRQ(CAN0_IRQn);
|
|
#endif
|
|
|
|
#ifdef BSP_USING_CAN1
|
|
PORT_Init(PORTB, PIN3, PORTB_PIN3_CAN1_RX, 1);
|
|
PORT_Init(PORTB, PIN2, PORTB_PIN2_CAN1_TX, 0);
|
|
SYS->CLKEN1 |= (0x01 << SYS_CLKEN1_CAN1_Pos);
|
|
NVIC_EnableIRQ(CAN1_IRQn);
|
|
#endif
|
|
|
|
for (i = 0; i < sizeof(swm_can_cfg) / sizeof(swm_can_cfg[0]); i++)
|
|
{
|
|
can_obj[i].can_device.config = config;
|
|
can_obj[i].can_cfg = &swm_can_cfg[i];
|
|
result = rt_hw_can_register(&can_obj[i].can_device,
|
|
can_obj[i].can_cfg->name,
|
|
&swm_can_ops,
|
|
&can_obj[i]);
|
|
if (result != RT_EOK)
|
|
{
|
|
LOG_E("%s register fail.", can_obj[i].can_cfg->name);
|
|
}
|
|
else
|
|
{
|
|
LOG_D("%s register success.", can_obj[i].can_cfg->name);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
return 0;
|
|
}
|
|
|
|
INIT_BOARD_EXPORT(swm_can_init);
|
|
|
|
#endif /* BSP_USING_CAN */
|
|
#endif /* RT_USING_CAN */
|