Question

我试图通过串行线将一些Hayes命令（AT命令）发送到我的调制解调器。我调用的函数是post_request::open()。在此方法中，有一个静态命令字符串数组，其中包含用于配置连接配置文件的命令。我的第一个问题是：我应该使用更多＆＃34;灵活的＆＃34;创建命令列表的方法？我总是需要将这八个命令发送到我的调制解调器。当然，url，content_type和content_length会有所不同。也许有人可以告诉我更好的方法。

int post_request::open(const char *url, unsigned content_length, const char *content_type)
{
    static const char *commands[] =
    {
        // Connection profile
        "AT^SISS=0,conId,0;",
        // HTTP
        "AT^SISS=0,srvType,Http;",
        // User Agent
        "AT^SISS=0,hcUsrAgent," USER_AGENT_STRING ";",
        // HTTP method
        "AT^SISS=0,hcMethod,1;",
        // Placeholder for modem type bdx80
        "AT;",
        // Placeholder for address
        "AT;",
        // Placeholder for number of bytes sent
        "AT;",
        // Placeholder for content type
        "AT;",
        // Open internet session with configured profile
        "AT^SISO=0\r",
        NULL
    };

    // Some code...
    if (modem->modem_type == bdx80)
        commands[4] = "AT^SISS=0,secOpt,-1;";

    // Some more code...
    commands[6] = "AT^SISS=0,hcContLen,",content_length,";";

    // Code for content_type settings...

    int error = send_commands(modem, timeout, commands);
    if (error)
        return error;

}

完成连接配置文件设置后，我致电send_commands()。我有一个第三方库，用于uart传输和放大器。接收东西。我在send_commands()中调用的函数是uart_tx()。问题：我需要做什么才能正确拨打uart_tx()？我希望立即发送完整的命令列表。

THX

static int
send_commands(modem_t *modem, unsigned timeout, const char *commands[])
{
    // determine size of commands pointer array
    unsigned len = ???;
    // Send commands through serial line
    if (uart_tx(modem->port, ???, &len, timeout))
        return TIMEOUT;
}


/**
* Sends count bytes.
* @param port       The serial port.
* @param buf[in]    Pointer to the buffer containing the bytes to be sent.
* @param count[in,out]  Pointer to the value containing the number of bytes to send
*           (in) and the number of bytes actually sent (out).
* @param time_to_wait   The maximum amount of time the task should block waiting
*        for count bytes to be sent should the transmit queue be full at some time.
* @return 0 on successful transmission, 1 on timeout
*/
unsigned uart_tx(SerialPort port, const void *buf, unsigned *count, unsigned time_to_wait)

Answer 1

在将它们发送出去之前，您似乎只想将所有命令（memcpy或strcat或其他）连接到单个缓冲区中。

一次发送完整的字符串数组

1 个答案: