Controller for protocol conversion between multipath UART bus and CAN bus

Abstract

The invention discloses a controller for protocol conversion between a multipath UART bus and a CAN bus. The controller includes a UART module, a CAN module, and a logic control unit that is used for coordinating a communication control signal between the UART module and the CAN module as well as managing and bidirectionally transmitting data. The UART module comprises reception shift registers that can convert serial data into parallel data and reception FIFO buffers that are correspondingly connected to the logic control unit. The CAN module includes a CAN bus master, a transmit FIFO buffer that is connected with the logic control unit and a transmit shift register corresponding to the send FIFO buffer. According to the protocol conversion controller provided in the invention, multipath serial UART bus data can be timesharingly converted into CAN bus data, and the CAN bus data can also be converted into the UART serial bus data.

Description

technical field [0001] The invention relates to a protocol conversion controller, in particular, a protocol conversion controller between a multi-channel UART serial bus and a CAN bus. Background technique [0002] At present, some converters of UART serial bus and CAN bus on the market are mostly modular structures, and basically convert between single-channel UART and CAN: for example, a CAN and UART protocol converter module has two channels, and the upward channel It is a CAN interface, and the downstream channel is an RS232 and RS485 protocol interface; another example is a small embedded UART interface to CAN-bus network module of the patent number ZL200820188879. , but there is only one serial interface, and the price is relatively expensive, which cannot meet the requirements of multi-channel serial bus and CAN bus protocol conversion. Contents of the invention [0003] The purpose of the present invention is to provide a protocol conversion controller between mul...

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Problems solved by technology

[0002] At present, some converters of UART serial bus and CAN bus in the market are mostly of modular structure, and basically convert between single-channel UART and CAN: for example, a CAN and UART protocol converter module has two channels, the upper channel is CAN interface, and the lower channel is RS232 and RS485 protocol interface; another example is a small embedded UART interface to CAN-bus network module with patent number ZL200820188879.7 , although it is in the form of a single-chip package, the size is almost a DIP28 circuit, but there is only one serial interface, and the price is relatively expensive, which cannot meet the requirements of multi-channel serial bus and CAN bus protocol conversion

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