Setting Up the Code Generation Environment

Identifying alternate directories for the compiler to search (C_DIR)

The compiler uses the C_DIR environment variable to name alternate direc- tories that contain #include files and function libraries. To set the C_DIR envi- ronment variable, use this syntax:

set C_DIR=pathname1 [;pathname2 . . .]

The pathnames are directories that contain #include files or libraries (such as stdio.h). You can separate the pathnames with a semicolon or with a blank. In C source, you can use the #include directive without specifying path informa- tion. Instead, you can specify the path information with C_DIR.

Setting default shell options (C_OPTION)

You may find it useful to set the compiler, assembler, and linker default shell options using the C_OPTION environment variable. If you do this, the shell uses the default options and/or input filenames that you name with C_OPTION every time you run the shell.

Setting up default options with the C_OPTION environment variable is useful when you want to run the shell consecutive times with the same set of options and/or input files. After the shell reads the command line and the input file- names, it reads the C_OPTION environment variable and processes it.

To set the C_OPTION environment variable, use this syntax:

set C_OPTION=option1 [option2 . . .]

Environment variable options are specified in the same way and have the same meaning as they do on the command line. For example, if you want to always run quietly (the ±q option), enable C source interlisting (the ±s option), and link (the ±z option), set up the C_OPTION environment variable as follows:

set C_OPTION=±qs ±z

In the following examples, each time you run the compiler shell, it runs the linker. Any options following ±z on the command line or in C_OPTION are passed to the linker. This enables you to use the C_OPTION environment vari- able to specify default compiler and linker options and then specify additional compiler and linker options on the shell command line. If you have set ±z in the environment variable and want to compile only, use the ±c option of the shell. These additional examples assume C_OPTION is set as shown above:

cl470

*.c

 

; compiles and links

cl470

±c

*.c

 

; only

compiles

cl470

*.c ±z

lnk.cmd

; compiles and links using a

 

 

 

 

;

command file

cl470

±c

*.c

±z lnk.cmd

;

only

compiles (±c overrides ±z)

2-6

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Texas Instruments TMS470R1x manual Set CDIR=pathname1 pathname2, Set COPTION=option1 option2
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TMS470R1x specifications

The Texas Instruments TMS470R1x series is an advanced family of microcontrollers designed for automotive and industrial applications, renowned for their robust performance, flexibility, and reliable functionality. Built on a 32-bit RISC architecture, this series provides a powerful computing platform, tailored for embedded control systems.

One of the standout features of the TMS470R1x is its high-performance processing capabilities. Operating at clock speeds of up to 120 MHz, these microcontrollers can handle complex calculations and control algorithms efficiently. The TMS470R1x also incorporates a rich set of peripherals, including timers, pulse width modulation (PWM) modules, and communication interfaces like CAN, SPI, and UART. This versatility makes the series suitable for a wide range of applications, from automotive engine control units to industrial automation systems.

Incorporating advanced memory options, the TMS470R1x features Flash memory sizes ranging from 128 KB to 512 KB, along with RAM ranging from 20 KB to 64 KB. This ample memory is crucial for storing firmware and handling multiple data streams in real time. The microcontrollers also support in-system programming, allowing for easy updates and code modifications during the product lifecycle.

The TMS470R1x series is designed with safety in mind. It adheres to ISO 26262 standards, ensuring high levels of functional safety necessary for automotive systems. Features such as redundancy, error correction, and built-in safety mechanisms ensure operations remain reliable even in fault conditions.

Another important characteristic of the TMS470R1x is its low power consumption, making it ideal for battery-operated devices and equipment. The series employs various power management techniques, including low-power sleep modes, enabling manufacturers to optimize their systems without sacrificing performance.

The integrated Debug and Trace capabilities of the TMS470R1x facilitate effective development and troubleshooting. Engineers can debug their applications in real time, significantly reducing time-to-market and enhancing overall product quality.

In summary, the Texas Instruments TMS470R1x microcontroller series offers a powerful and versatile platform for complex automotive and industrial applications. With its high processing speed, extensive memory options, compliance with safety standards, low power consumption, and robust debugging capabilities, the TMS470R1x is a reliable choice for developers seeking to create innovative and efficient embedded systems. These features combine to position the TMS470R1x series as a leading choice in the expanding field of advanced microcontrollers.
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