列车tcn网络mvb从站接收代码流程解析-编程知识

列车tcn网络mvb从站接收代码流程解析

TCN-列车通信网络概述

机车车辆通信网络（TCN-列车通信网络）的基本组件是在整个列车单元中提供数据通信的有线列车总线（WTB）和用于在车辆或固定连接车辆组（组成）内进行数据交换（通信）的多功能车辆总线（MVB）。每个要连接到WTB网络的组件都必须配备WTB通信节点（称为WTB网关）。MVB通信网络也可以通过该节点连接。这称为 TCN WTB/MVB 网关。

mvb板卡设置需求

需求：mvb板卡从站配置地址0x002，源端口0x500，端口大小32字节。

MVB从站源代码实现过程

1、板卡初始化
2、过程数据初始化
3、传输存储与新鲜度初始化
4、源端口初始化 PD_SOURCE_PORT
5、设备地址初始化
6、循环接收数据
7、交叉编译后生成arm64文件格式

1、板卡初始化

TCN_DECL_PUBLIC
AS_RESULT
as_init (void)
{LS_RESULT   ls_result = LS_OK;ENUM8       link_id;link_id = 0;while ((link_id < ls_max_links) && (LS_OK == ls_result)){ls_result = ls_init(link_id);/* ignore LS_UNKNOWN_LINK */if (LS_UNKNOWN_LINK == ls_result){ls_result = LS_OK;} /* if (LS_UNKNOWN_LINK == ls_result) */link_id++;} /* while ((link_id < ls_max_links) && (LS_OK == ls_result)) */return((AS_RESULT)ls_result);} /* as_init */

2、过程数据初始化

TCN_DECL_PUBLIC
AP_RESULT
ap_init (void)
{AP_RESULT   ap_result = AP_OK;LP_RESULT   lp_result = LP_OK;ENUM8       ts_id;#if (TCN_AP_MUTEX_PORT == 1)/* initialise mutex for port access */if (FALSE == tcn_ap_mutex_status_port){if (0 != pthread_mutex_init(&tcn_ap_mutex_object_port, NULL)){ap_result = AP_ERROR;} /* if (0 != pthread_mutex_init(&tcn_ap_mutex_object_port, NULL)) */else{tcn_ap_mutex_status_port = TRUE;} /* else */} /* if (FALSE == tcn_ap_mutex_status_port) */if (TRUE == tcn_ap_mutex_status_port){if (0 != pthread_mutex_lock(&tcn_ap_mutex_object_port)){ap_result = AP_ERROR;} /* if (0 != pthread_mutex_lock(&tcn_ap_mutex_object_port)) */if (AP_OK == ap_result){if (0 != pthread_mutex_unlock(&tcn_ap_mutex_object_port)){ap_result = AP_ERROR;} /* if (0 != pthread_mutex_unlock(&tcn_ap_mutex_object_port)) */} /* if (AP_OK == ap_result) */} /* if (TRUE == tcn_ap_mutex_status_port) */
#endif /* #if (TCN_AP_MUTEX_PORT == 1) */if (AP_OK == ap_result){TCN_AP_MACRO_MUTEX_LOCK();ts_id = 0;while ((ts_id < lp_max_traffic_stores) && (LP_OK == lp_result)){lp_result = lp_init(ts_id, 0);/* ignore LP_UNKNOW_TS */if (LP_UNKNOW_TS  == lp_result){lp_result = LP_OK;} /* if (LP_UNKNOW_TS  == lp_result) */ts_id++;} /* while ((ts_id < lp_max_traffic_stores) && (...)) */TCN_AP_MACRO_MUTEX_UNLOCK();ap_result = (AP_RESULT)lp_result;} /* if (AP_OK == ap_result) */return(ap_result);} /* ap_init */

3、传输存储与新鲜度初始化

TCN_DECL_PUBLIC
AP_RESULT
ap_ts_config
(ENUM8       ts_id,UNSIGNED16  fsi
)
{LP_RESULT   lp_result;TCN_AP_MACRO_MUTEX_LOCK();lp_result = lp_init(ts_id, fsi);TCN_AP_MACRO_MUTEX_UNLOCK();return((AP_RESULT)lp_result);} /* ap_ts_config */

4、源端口初始化 PD_SOURCE_PORT

        pd_port_address            = 0x500;pd_prt_attr.port_size      = 32;pd_prt_attr.port_config = PD_SOURCE_PORT;// PD_SINK_PORT;pd_prt_attr.p_bus_specific = NULL;ap_result =                 \ap_port_manage          \(                       \0,                  \pd_port_address,    \PD_PRT_CMD_CONFIG,  \&pd_prt_attr        \);

5、设备地址初始化

        mvb_control.device_address  = 0x002;mvb_control.reserved1       = 0x00;mvb_control.t_ignore        = 0x00;mvb_control.reserved2       = 0x00;mvb_control.command         = SV_MVB_CTRL_CMD_BIT_SLA;mvb_control.command        |= SV_MVB_CTRL_CMD_BIT_SLB;mvb_control.reserved3       = 0x0000;as_result =                             \as_service_handler                  \(                                   \0,                              \SV_MVB_SERVICE_WRITE_CONTROL,   \(void*)&mvb_control             \);

6、循环接收数据

if (0 == result)
{
ds_name.traffic_store_id = 0;
ds_name.port_address = 0x500;
ap_result = ap_put_dataset(&ds_name, &pd_port_data[0]);
if (ap_result != AP_OK)
{
TCN_OSL_PRINTF("ERROR: ap_result=%u\n", ap_result);
TCN_DEMO_ON_ERROR(ap_result);
result = (UNSIGNED16)ap_result;
} /* if (ap_result != AP_OK) */
} /* if (0 == result) */

7、交叉编译后生成arm64文件格式

make 编译Makefile文件

slave: ELF 64-bit LSB executable, ARM aarch64, version 1 (GNU/Linux), statically linked, for GNU/Linux 3.7.0, BuildID[sha1]=4042a2f2a5d572698a6882f773b06be008799613, with debug_info, not stripped