平台的搭建除了海思本身对于音视频的处理,难免需要串口网口之类收发指令并做出处理;每个甲方爸爸对于协议的规定肯定有所差异,以最简单的校对系统时间为例,用网口发送协议,通过ini配置文件加载协议变量的方式实现免编译,只更新ini配置文件就可移植产品功能的作用
最关键的变量加载办法详见
海思3559万能平台搭建:配置文件iniparser的引入
新建配置文件如protocol.ini,按照约定格式编写配置文件内容,规定包长21位 包头为0x55,0xAA,识别时间校对的功能码为0xAB
[attr]
ini_cmd_length_total = 21;
[content]
ini_cmd_head1 = 0x55;
ini_cmd_head2 = 0xAA;
[func_osd]
ini_cmd_func_osdenable = 0xA5;
ini_cmd_data_mode_osdoff = 1;
ini_cmd_data_mode_osdon = 2;
;2开1关
[func_time]
ini_cmd_func_timecorrect = 0xAB;
按照约定的用法加载配置文件
static int ini_cmd_length_total;//协议规定的包长度
static int ini_cmd_head1;//协议规定的第一个包头B1
static int ini_cmd_head2;//协议规定的第二个包头B2
static int ini_cmd_length;//协议包内的的包长B3
// static int ini_cmd_func;//协议规定的功能码B4
// static int ini_cmd_data_mode;//协议规定的数据区工作模式B5
static int ini_cmd_func_osdenable = 0;//协议规定的OSD功能码B4
static int ini_cmd_data_mode_osdon = 0;//协议规定的OSD数据区工作模式B5
static int ini_cmd_func_timecorrect = 0;//协议规定的时间校正B4
static int ini_cmd_data_mode_timetype = 0;//协议规定的时间校正类型B5
HI_S32 protocol_ini_init()
{
dictionary * ini ;
ini = iniparser_load(PROTOCOLPATH);
if (ini==NULL) {
fprintf(stderr, "cannot parse file: %s\n", PROTOCOLPATH);
return -1 ;
}
SAMPLE_PRT("config protocol file load success!\n");
ini_cmd_length_total = iniparser_getint(ini,"attr:ini_cmd_length_total",-1);
ini_cmd_head1 = iniparser_getint(ini,"content:ini_cmd_head1",-1);
ini_cmd_head2 = iniparser_getint(ini,"content:ini_cmd_head2",-1);
ini_cmd_func_osdenable = iniparser_getint(ini,"func_osd:ini_cmd_func_osdenable",-1);
ini_cmd_data_mode_osdon = iniparser_getint(ini,"func_osd:ini_cmd_data_mode_osdon",-1);
ini_cmd_func_timecorrect = iniparser_getint(ini,"func_time:ini_cmd_func_timecorrect",-1);
SAMPLE_PRT("ini_cmd_head1 is 0x%x\n",ini_cmd_head1);
SAMPLE_PRT("ini_cmd_head2 is 0x%x\n",ini_cmd_head2);
SAMPLE_PRT("ini_cmd_func_osdenable is 0x%x\n",ini_cmd_func_osdenable);
SAMPLE_PRT("ini_cmd_data_mode_osdon is %d\n",ini_cmd_data_mode_osdon);
SAMPLE_PRT("ini_cmd_func_timecorrect is 0x%x\n",ini_cmd_func_timecorrect);
iniparser_freedict(ini);//释放dictionary对象(内存)
return 0;
}
以网口为例,收到数据后进入协议解析函数
/*描述 :网口接收线程
*参数 :arg 无参数传入
*返回值:无
*注意 :使用需打开网口服务器端
*/
HI_VOID * eth_client_recv_task(HI_VOID *arg)
{
cpu_set_t mask;//cpu核的集合
cpu_set_t get;//获取在集合中的cpu
int num = sysconf(_SC_NPROCESSORS_CONF);
printf("frame_check_task:system has %d processor(s)\n", num);
CPU_ZERO(&mask);//置空
CPU_SET(0, &mask);//设置亲和力值
if (pthread_setaffinity_np(pthread_self(), sizeof(mask), &mask) < 0)//设置线程CPU亲和力
{
fprintf(stderr, "set thread affinity failed\n");
}
if (pthread_getaffinity_np(pthread_self(), sizeof(get), &get) < 0)//获取线程CPU亲和力
{
fprintf(stderr, "get thread affinity failed\n");
}
int connect_fd = -1;
int recv_len;
struct sockaddr_in server;
socklen_t saddrlen = sizeof(server);
// uint8 data_header[] = {0x55, 0xAA};
// unsigned char addchk=0;
// uint8 data_header[] = {0x55, 0xAA};
// printf("\nbeforen DataParser\n ");
// DataParser *data_parser = parser_init(data_header, sizeof(data_header), NULL, 0, CMD_LENGTH);
// printf("\nDataParser INIT SUCCESS\n ");
// char* tmp_cmd=(char*)&g_trk_cmd;
memset(&server, 0, sizeof(server));
connect_fd = socket(AF_INET, SOCK_STREAM, 0);
if (connect_fd < 0)
{
printf("socket error!\n");
// return NULL;
}
printf("\nETH CLIENT RECV TEST\n");
server.sin_family = AF_INET;
server.sin_port = htons(SERVER_PORT);
// server.sin_addr.s_addr = inet_addr(SERVER_IP);
server.sin_addr.s_addr = inet_addr(server_ip);
if (connect(connect_fd, (struct sockaddr *)&server, saddrlen) < 0)
{
printf("connect failed!\n");
// return -1;
}
// char PLATFORM_IP_SET[64]={0};
// char PLATFORM_IP_CMD[]="192.168.0.168";
// sprintf(PLATFORM_IP_SET,"ifconfig eth0 %s up",PLATFORM_IP_CMD);
// system(PLATFORM_IP_SET);
else
{
char recvbuf[1024]={0};
while (1)
{
recv_len = read(connect_fd, recvbuf, sizeof(recvbuf));
if(recv_len)
{
// printf("\nEth:recv origin data: ");
// recvbuf[len] = '\0';
for (int i = 0;i < recv_len ;i++)
{
printf("%02x ",recvbuf[i]);
}
printf("\n");
protocol_parser(recvbuf,recv_len);
}
}
close(connect_fd);
}
return 0;
}
解析方法也很简单,规定一下协议
时间类型:uint8,当前版本固定为0x00;
年:uint8,年份-2000;
月:uint8,月份,取值范围1-12;
日:uint8,日期,取值范围1-31;
毫秒:uint32,当前时间的毫秒计数。
HI_S32 protocol_parser(char* recvbuf,int recv_len)
{
HI_S32 i;
// HI_U8 data_header[] = {0x55, 0xAA};
HI_U8 data_header[] = {ini_cmd_head1, ini_cmd_head2};
HI_U8 addchk=0;
DataParser *data_parser = parser_init(data_header, sizeof(data_header), NULL, 0, ini_cmd_length_total);
char* tmp_cmd=(char*)&g_trk_cmd;
/* 解析协议内容 */
for (i = 0;i < recv_len ;i++)
{
// printf("%02x ",recvbuf[i]);
if(parser_put_data(data_parser, recvbuf[i]) == RESULT_TRUE)
{
/* 赋值给临时结构体tmp_cmd */
tmp_cmd=(char*)&g_trk_cmd;
addchk = 0;
for(int jj=0;jj<sizeof(g_trk_cmd)-sizeof(data_header);jj++)
{
tmp_cmd[jj+2]=parser_get_data(data_parser, jj);
// printf("%x ",tmp_cmd[jj+2]);
}
// printf("\n");
/* 校验尾 */
for(int kk = 2;kk < sizeof(g_trk_cmd)-1;kk++)
{
// addchk += parser_get_data(data_parser, kk);
addchk+=tmp_cmd[kk];
// printf("%x ",tmp_cmd[kk]);
}
// printf("\n");
g_trk_cmd.addchk = parser_get_data(data_parser,(ini_cmd_length_total-1-2));//第19个数,从0开始计18,故-1,又因为去头在-2
// printf("g_trk_cmd.addchk is %x\n",g_trk_cmd.addchk);
if(addchk != g_trk_cmd.addchk )
{
printf("warning:please check format :tail\n");
printf("addchk is %x\n",addchk);
memset_s(((uint8_t*)&g_trk_cmd)+2,
sizeof(g_trk_cmd)-sizeof(data_header),
0,
sizeof(g_trk_cmd)-sizeof(data_header));
continue;
}
else
{
/* 校验成功则往结构体赋值 */
g_trk_cmd.length = tmp_cmd[2];
// printf(" tmp_cmd[2]is %x\n",tmp_cmd[2]);
g_trk_cmd.CmdType = tmp_cmd[3];
// printf(" tmp_cmd[3]is %x\n",tmp_cmd[3]);
for (int ii = 0; ii < (ini_cmd_length_total-1-2-2) ;ii++)//去头-2去尾-1去功能-1从0开始计数-1
{
g_trk_cmd.Para[ii] = tmp_cmd[ii+4];;
}
}
}
}
if (g_trk_cmd.CmdType == ini_cmd_func_timecorrect)
{
printf("time correct\n");
unsigned char tmp_year = g_trk_cmd.Para[1];
unsigned char tmp_month = g_trk_cmd.Para[2];
unsigned char tmp_day = g_trk_cmd.Para[3];
unsigned int tmp_ms = (g_trk_cmd.Para[4]<<24)|(g_trk_cmd.Para[5]<<16)|(g_trk_cmd.Para[6]<<8)|(g_trk_cmd.Para[7]);
SetSystemTime(tmp_year,tmp_month,tmp_day,tmp_ms);
}
return 0;
}
没有直接传入时分秒,直接传入ms值也可以计算时间
/*
*描述 :协议规定的时间校准功能
*参数 :uint32_t tyear 要设的年
* uint32_t tmonth 要设的月
* uint32_t tday 要设的日
* uint32_t tmsecs 要设的毫秒,用于转成时分秒
*返回值:成功返回0
*注意 :无
*/
int SetSystemTime(uint32_t tyear,uint32_t tmonth,uint32_t tday,uint32_t tmsecs)
{
struct tm t_tm;
struct timeval tv;
time_t timep;
uint32_t thour=0;
uint32_t tminutes=0;
uint32_t tseconds=0;
thour = tmsecs / (1000 * 60 * 60);
tminutes = (tmsecs % (1000 * 60 * 60)) / (1000 * 60);
tseconds = (tmsecs % (1000 * 60)) / 1000;
t_tm.tm_sec = tseconds;
t_tm.tm_min = tminutes;
t_tm.tm_hour = thour;
t_tm.tm_mday = tday;
t_tm.tm_mon = tmonth - 1;
t_tm.tm_year = tyear +2000- 1900;
timep=mktime(&t_tm);
stime(&timep);
return 0;
}