preamble::
TSMaster currently has two modes for reading messages: callback function mode and fifo mode. fifo function is a recent addition to TSMaster, and this article will focus on the fifo module. You can refer to the Quick Start manual of the Help module for more information about how to use the callback function.
Technical background
TSMaster's applet module provides callback events such as receive event, send event and pre-send event, as shown in Figure 1. compared with the callback function, the fifo function is more flexible and convenient to use, and it can be used in any module, which is no longer limited to the callback events such as receive, send, etc. The related fifo function can be found in [Design] - [C applet] - [Function], as shown in Figure 2. Related fifo functions can be found in [Design] - [C applet] - [Function], as in Figure 2.
Overview of the fifo function
A fifo is a data structure or buffering mechanism that follows the first-in-first-out principle. During data reception, the data that enters the fifo earliest is processed or read first. fifo has an input port and an output port. Data enters the fifo buffer sequentially from the input port and is queued in the buffer in the order in which it enters. When data needs to be read, it is taken out of the output port in first-in-first-out order. This ensures that data is received and processed in the same order as they arrive, avoiding data confusion or loss. fifo has the advantage that the user can read data from the driver as needed in their own tasks or threads, and the latency can be controlled by themselves. The disadvantage is the asynchronous way, is in the message has been sent and received before the data will be taken out for processing.
Typical Applications:
In automotive engines, transmissions and other powertrain systems, multiple sensors and actuators communicate via the CAN bus. fifo is used to receive CAN messages from various sensors (e.g., throttle position sensors, crankshaft position sensors), which contain key information such as engine operating status, speed, load, etc. The fifo stores the messages in the order in which they arrive. These telegrams contain key information such as engine operating status, speed, load, etc. The fifo stores the telegrams in the order in which they arrive, and the engine control unit (ECU) reads the telegrams sequentially from the fifo, analyzes and processes the data and adjusts the injection time, ignition advance angle and other parameters to ensure that the engine operates efficiently and stably in different operating conditions.
The fifo function reads a message.
3.1 Functional realization
3.1.1 Reading CAN messages
Before using fifo to read cached messages, you need to call the com.tsfifo_enable_receive_fifo() function. This subsection will provide a simple example, which can be found in the following steps.
Step 1] Create a new program startup event and add the function to enable fifo to the event function. Figure 3.
Step 2] Create a new key event and add the function to read the fifo to the event function. Figure 4.
[Step 3] Create a new program stop event and add the function to disable fifo to this event function. Figure 5.
[Source code as follows]
3.1.2 Reading LIN messages
The com.tsfifo_enable_receive_fifo() function needs to be called before using fifo to read cached messages. Refer to subsection 3.1.1 Reading CAN messages.
[Source code as follows]
3.1.3 Reading FlexRay messages
The com.tsfifo_enable_receive_fifo() function needs to be called before using fifo to read cached messages. Refer to subsection 3.1.1 Reading CAN messages.
[Source code as follows]
3.2 Realization of effects
Start the applet, send the message, and the printed message can be viewed at [Analysis] - [System Message], as in Figure 6.
TSMaster fifo function description
4.1 Description of the fifo function
4.1.1 com.tsfifo_enable_receive_fifo
4.1.2 com.tsfifo_disable_receive_fifo
4.1.3 com.tsfifo_enable_receive_error_frames
4.1.4 com.tsfifo_disable_receive_error_frames
4.1.5 com.tsfifo_add_can_canfd_pass_filter
4.1.6 com.tsfifo_delete_can_canfd_pass_filter
4.1.7 com.tsfifo_add_lin_pass_filter
4.1.8 com.tsfifo_delete_lin_pass_filter
4.1.9 com.tsfifo_clear_can_receive_buffers
4.1.10 com.tsfifo_clear_canfd_receive_buffers
4.1.11 com.tsfifo_clear_lin_receive_buffers
4.1.12 com.tsfifo_clear_flexray_receive_buffers
4.1.13 com.tsfifo_read_can_buffer_frame_count
4.1.14 com.tsfifo_read_can_rx_buffer_frame_count
4.1.15 com.tsfifo_read_can_tx_buffer_frame_count
4.1.16 com.tsfifo_read_canfd_buffer_frame_count
4.1.17com.tsfifo_read_canfd_rx_buffer_frame_count
4.1.18 com.tsfifo_read_can_tx_buffer_frame_count
4.1.19 com.tsfifo_read_lin_buffer_frame_count
4.1.20 com.tsfifo_read_lin_rx_buffer_frame_count
4.1.21 com.tsfifo_read_lin_tx_buffer_frame_count
4.1.22 com.tsfifo_read_flexray_buffer_frame_count
4.1.23 com.tsfifo_read_flexray_rx_buffer_frame_count
4.1.24 com.tsfifo_receive_can_msgs
4.1.25 com.tsfifo_receive_canfd_msgs
4.1.26 com.tsfifo_receive_lin_msgs
4.1.27 com.tsfifo_receive_flexray_msgs
Abbreviations
| BLF | Binary Logging Format |
| CAN | Controller Area Network |
| CAN FD | CAN with Flexible Data-Rate |
| ID | Identifier |
| LIN | Local Interconnect Network |
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