Assigning quint16_t to QByteArray while sending serial data frame from PC to device

[anita.niharika@gmail.com]

Hi,

My structure contains a variable of type quint16_t and before sending to a device through serial port, I am appending it to a QByteArray. As QByteArray holds byte, I see only one byte is sent. Actually I want len field should hold 2 bytes.

typedef struct x_hdr
{
....
quint16_t len;
}x;
 
 
void tx_msg_fun(QByteArray *tx_msg)
{
tx_msg->append(sizeof(x));
}

typedef struct x_hdr
{
....
quint16_t len;
}x;


void tx_msg_fun(QByteArray *tx_msg)
{
tx_msg->append(sizeof(x));
}

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serial data frame is : SOF (1 byte)| seq (1 byte) | len (2 bytes) [holds length of data] | payload (n bytes)| chksum (2 bytes) | eof (1 byte)

When I send this, only one byte is allocated for len & chksum field.
How can append 2 bytes in the serial frame. Could someone help me on this ?

Best Regards,
Anita