ASCII Decode V2

Parse ASCII character vector into Simulink values

Since R2020b

• 

Libraries:
Simulink Real-Time / RS232

Description

The ASCII Decode block parses an input vector produced by one of the following:

• Serial port Receive block

• Serial port FIFO Read block

• ASCII Encode block

This block makes the converted values available to a real-time application. It assumes that the input vector was prepared using an output format specifier similar to printf and uses an input format specifier similar to scanf.

This block generates inline code for the Speedgoat^® target computer. You cannot use it for Simulink^® simulation.

For more information, see RS-232 Serial Communication and RS-232 Legacy Drivers.

Examples

ASCII Encoding/Decoding Loopback Test

Send ASCII data over a serial link.

• Open Script

ASCII Encoding/Decoding Resync Loopback Test

Use the ability of the FIFO Read HDRS block to resynchronize after being repeatedly disabled and apply this ability to resolve errors such as when a message is only partially complete at the time the read is attempted.

• Open Script

Binary Encoding/Decoding Loopback Test

Send Binary data over a serial link.

• Open Script

Binary Encoding/Decoding Resync Loopback Test

Use the ability of the FIFO Read BINARY block to handle messages that are interrupted and only partially complete.

• Open Script

Simple ASCII Encoding/Decoding Loopback Test (with Baseboard Blocks)

Convert a single floating point number to ASCII and transmit the value over a serial link.

• Open Script

ASCII Encoding/Decoding Loopback Test (with Baseboard Blocks)

Send ASCII data over a serial link.

• Open Model

ASCII Encoding/Decoding Resync Loopback Test (with Baseboard Blocks)

Use the ability of the FIFO Read HDRS block to resynchronize after being repeatedly disabled and apply this ability to resolve errors such as when a message is only partially complete at the time the read is attempted.

• Open Script

Binary Encoding/Decoding Loopback Test (with Baseboard Blocks)

Send Binary data over a serial link.

• Open Script

Binary Encoding/Decoding Resync Loopback Test (with Baseboard Blocks)

Use the ability of the FIFO Read BINARY block to handle messages that are interrupted and only partially complete.

• Open Script

Ports

Input

Data — Input vector to parse

character vector

The input vector can be either 8-bit or 16-bit and signed or unsigned. If the data format is 16-bit, the block ignores the upper 8 bits of each entry.

Data Types: int8 | uint8 | int16 | uint16

Output

cnt — Number of format specifiers satisfied by input

integer

cnt receives the number of format specifiers satisfied by the input character vector.

Value — Inlined ports that send Simulink values

numeric

Output ports corresponding to items in Format.

This block generates inline code for the target computer. You cannot use it for Simulink simulation.

Data Types: single | double | int8 | uint8 | uint16 | int16 | int32 | uint32

Parameters

Format — Format specifier for parsing input vector

'%f\n' (default) | %c | %d | %i | %o | %u | %x | %e | %g

Enter a scanf like format string. Each format specifier such as %d must match a corresponding part of the input vector. Literal strings in the format must match the characters in the input vector. The format specifiers follow the normal description for scanf. The specifiers must be enclosed in single quotes. Failure to include these quotes causes simulation failures.

An example format string is:

'alpha %d bravo %f\n'

In this example, the data from the FIFO read is 'alpha 5'. In this case, cnt is 1 and the second output is unchanged from the last time both were found in a character vector. If the model expects 2 values, and cnt is less than 2, the model detects an error in the data.

Programmatic Use

Block Parameter: format

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2020b