A detection function that determines whether the serial port receives new data. The serial port receives the detection function.

A detection function that determines whether the serial port receives new data. The serial port receives the detection function.

Unsigned char Rxdsuc_test () { Unsigned char noRxd_time = 10; // It is deemed that the data has been accepted after 10*5 ms and the next character is not received. If (newRxd_flag) // when the sci serial port receives a character, newRxd_flag is set to 1; noRxd_flag is set to 0; { While (noRxd_time) { If (noRxd_flag) { Delay5ms (1 ); If (noRxd_flag) NoRxd_time --; } Else { NoRxd_time = 10; // In the 10*5 ms wait, once the next character is received, the wait time is reset to 10*5 ms. NoRxd_flag = 1; } } RxdPoint = 0; NewRxd_flag = 0; Rxdsuc_flag = 1; Return 1; // indicates that the new data has been received } Return 0; // indicates no new data }

This function is used anywhere in the program and called when receiving data.