System and method for check and feedback of serial synchronous bus for mobile phone platform

Abstract

The invention provides a system and a method for check and feedback of a serial synchronous bus for a mobile phone platform. The system comprises the following steps of performing communication between master equipment and slave equipment, and enabling a sending data controller to add a check bit for the sent data by using word as unit; sending the data to the master equipment in a word-for-word way, and enabling a checker of the slave equipment to check the received data in the word-for-word way; enabling the slave equipment to send the check result to the master equipment; if the check result is correct, enabling the master equipment to send the next data; if the check result is false, enabling the slave equipment to clear the data, and enabling the master equipment to send the data again; after the master equipment sends all data, interrupting the communication with the slave equipment. The method has the advantages that under the condition of the slave equipment collecting the false data, the false data can be timely cleared by the sending data controller and the checker, the normal communication between the master equipment and the slave equipment is protected, and the master equipment sends the data at the earliest time when the communication is interfered.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a serial synchronous bus verification feedback system and method applied to a mobile phone platform. Background technique [0002] In the prior art, in the mobile phone system, when the baseband chip (master) needs to communicate with the peripheral chip (slave) through a serial synchronous bus, usually in order to save power and avoid metastable Purpose, the data interface of the slave device usually uses the input bus clock (CLK) as the internal drive clock of the interface circuit. When the clock is disturbed, it will cause errors in the data reception of the slave device. Unable to detect in time, resulting in abnormal operation of the slave device, while the master device missed the optimal resend time due to inability to detect in time. [0003] Such as figure 1 As shown, it is a traditional communication control circuit connection relationship. In the traditional...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a serial synchronous bus verification feedback system and method applied to the mobile phone platform, so as to solve the problem that the existing master device cannot find in time that the data received by the slave device is wrong and misses the optimal retransmission time

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