Title:
【発明の名称】デジタル信号処理プロセッサーの非同期式直列データの送受信方法
Document Type and Number:
Japanese Patent JP2971849
Kind Code:
B2
Abstract:
Methods of transmitting and receiving asynchronous serial data using a serial port of a digital signal processor are provided. The method of asynchronously receiving serial data via a serial port a TMS320C30 DSP including: a reception timer period register for storing pulse section information representing how many clock pulses correspond to one bit of data; and a reception timer counter for counting the clock pulses up to a value determined by the reception timer period register, resetting the counted value to zero, and counting again starting from zero, includes the steps of determining whether a start bit is received, enabling the serial port when the received start bit falls from high to low, setting the initial value of the reception timer counter to half the value in the reception pulse section register, receiving one bit of data whenever the value of the reception timer counter becomes equal to the value in the reception timer period register, the reception is repeated until a stop bit is received, and disabling the serial port when the stop bit is received. According to this method, data is asynchronously transmitted and received via a synchronous serial port of a TMS320C30 DSP. Therefore, a fault does not occur even during a long communication, and very reliable asynchronous serial communication is possible.
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Inventors:
KO CHINSHIN
Application Number:
JP9501898A
Publication Date:
November 08, 1999
Filing Date:
April 07, 1998
Export Citation:
Assignee:
SANSEI DENSHI KK
International Classes:
G06F13/38; G06F15/17; H04L7/04; H04L25/40; H04L12/00; H04L25/38; H04L29/08; (IPC1-7): H04L25/40; G06F13/38; H04L7/04
Domestic Patent References:
| JP6281840A | ||||
| JP63238745A | ||||
| JP385043A | ||||
| JP6220451A |
Attorney, Agent or Firm:
Masatake Shiga (1 person outside)