From d70f4396b425bea8ad313419c24860fdac295408 Mon Sep 17 00:00:00 2001 From: tianjialong Date: Mon, 17 Apr 2023 16:18:34 +0800 Subject: [PATCH] update --- .vscode/settings.json | 10 ++++ c/a.out | Bin 13144 -> 13144 bytes c/main.c | 14 +++-- cpp/.vscode/settings.json | 6 -- cpp/a.out | Bin 0 -> 14272 bytes cpp/main.cpp | 136 ++++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 155 insertions(+), 11 deletions(-) create mode 100644 .vscode/settings.json mode change 100644 => 100755 c/a.out delete mode 100644 cpp/.vscode/settings.json create mode 100755 cpp/a.out diff --git a/.vscode/settings.json b/.vscode/settings.json new file mode 100644 index 0000000..37cb76e --- /dev/null +++ b/.vscode/settings.json @@ -0,0 +1,10 @@ +{ + "files.associations": { + "malloc.h": "c", + "types.h": "c", + "stdlib.h": "c", + "sstream": "cpp", + "ostream": "cpp", + "iostream": "cpp" + } +} \ No newline at end of file diff --git a/c/a.out b/c/a.out old mode 100644 new mode 100755 index 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char databuf[100]; // 发送/接受数据 + int serfd; // 串口文件描述符 + +} ser_Data; + +void *sersend(void *arg); +void *serrecv(void *arg); + +int main(int argc, char *argv[]) { + pthread_t pid1, pid2; + pthread_attr_t *pthread_arr1, *pthread_arr2; + pthread_arr1 = NULL; + pthread_arr2 = NULL; + int serport1fd; + + /* 进行串口参数设置 */ + termios *ter_s = (termios *)malloc(sizeof(*ter_s)); + + serport1fd = open(argv[1], O_RDWR | O_NOCTTY | O_NDELAY); // 不成为控制终端程序，不受其他程序输出输出影响 + if (serport1fd < 0) { + printf("%s open faild\r\n", argv[1]); + return -1; + } + + bzero(ter_s, sizeof(*ter_s)); + + ter_s->c_cflag |= CLOCAL | CREAD; // 激活本地连接与接受使能 + + ter_s->c_cflag &= ~CSIZE; // 失能数据位屏蔽 + ter_s->c_cflag |= CS8; // 8位数据位 + + ter_s->c_cflag &= ~CSTOPB; // 1位停止位 + + ter_s->c_cflag &= ~PARENB; // 无校验位 + + ter_s->c_cc[VTIME] = 0; + ter_s->c_cc[VMIN] = 0; + + /*1 VMIN> 0 && VTIME> 0 + VMIN为最少读取的字符数，当读取到一个字符后，会启动一个定时器，在定时器超时事前，如果已经读取到了VMIN个字符，则read返回VMIN个字符。如果在接收到VMIN个字符之前，定时器已经超时，则read返回已读取到的字符，注意这个定时器会在每次读取到一个字符后重新启用，即重新开始计时，而且是读取到第一个字节后才启用，也就是说超时的情况下，至少读取到一个字节数据。 + 2 VMIN > 0 && VTIME== 0 + 在只有读取到VMIN个字符时，read才返回，可能造成read被永久阻塞。 + 3 VMIN == 0 && VTIME> 0 + 和第一种情况稍有不同，在接收到一个字节时或者定时器超时时，read返回。如果是超时这种情况，read返回值是0。 + 4 VMIN == 0 && VTIME== 0 + 这种情况下read总是立即就返回，即不会被阻塞。----by 解释粘贴自博客园 + */ + cfsetispeed(ter_s, B115200); // 设置输入波特率 + cfsetospeed(ter_s, B115200); // 设置输出波特率 + + tcflush(serport1fd, TCIFLUSH); // 刷清未处理的输入和/或输出 + + if (tcsetattr(serport1fd, TCSANOW, ter_s) != 0) { + printf("com set error!\r\n"); + } + + char buffer[] = {"hello my world!\r\n"}; + char recvbuf[100] = {}; + + ser_Data snd_data = { + .databuf = {0}, + .serfd = serport1fd, + }; + ser_Data rec_data = { + .databuf = {0}, + .serfd = serport1fd, + }; + + memcpy(snd_data.databuf, buffer, strlen(buffer)); // 拷贝发送数据 + + pthread_create(&pid1, pthread_arr1, sersend, (void *)&snd_data); + pthread_create(&pid2, pthread_arr2, serrecv, (void *)&rec_data); + + while (1) { + usleep(100000); + } + + pthread_join(pid1, NULL); + pthread_join(pid2, NULL); + free(ter_s); + return 0; +} + +void *sersend(void *arg) // 串口发送线程函数 +{ + ser_Data *snd = (ser_Data *)arg; + int ret; + while (1) { + ret = write(snd->serfd, snd->databuf, strlen(snd->databuf)); + if (ret > 0) { + printf("send success, data is %s\r\n", snd->databuf); + } else { + printf("send error!\r\n"); + } + usleep(300000); + /* + if(发生中断) + break;//退出 + */ + } +} + +void *serrecv(void *arg) // 串口发送线程函数 +{ + ser_Data *rec = (ser_Data *)arg; + int ret; + while (1) { + ret = read(rec->serfd, rec->databuf, 1024); + if (ret > 0) { + printf("recv success,recv size is %d,data is %s\r\n", ret, rec->databuf); + } else { + /* + 什么也不做 + */ + } + usleep(1000); + /* + if(发生中断) + break;//退出 + */ + } +}