Method for receiving of asynchronous serial data in paging transceiver

摘要

The present invention can easily receive other serial data in which the additions and changes without changing design of other serial data received, the microprocessor due to the feature additions and changes to the microprocessor on the slave controller of the paging transmitters through its external port as one of the asynchronous serial data receiving method of paging transmitters so that,; The present invention stores the half-bit time value and the total bit length value in data received by connecting the received data channel is assigned to a different port on the microprocessor, with the send and receive the serial port of the first channel to the external port to the memory, and an external interrupt and to detect the start bit, the method comprising: prohibiting external interrupt after detecting a falling edge of the start bit; Further comprising: a set of data bits a half-time of the external interrupt falling edge of the timer value after the prohibition in the above step, and enable him, and half-frame set to 1 and the timer interrupt; When the timer interrupt occurs after the step of setting the timer value to a full bit time data and initializes the half frame to determine that he is the first half-frame is he first half frame and the Cree data count and the receive buffer; Reading a single bit at that time to Kerry, and then the increase in the data counter and increases the counter data is judged less than 9 is less than 9 if the movement of the bits in the receive buffer to the right, and then waits for the next timer interrupt is generated; Characterized in that it comprises the step of: at said step of data counter 9 is a parity frame movement thereof received and Kerry, the data is stopped, the timer interrupt is greater than 9, and detect the early start bit falling edge.