Addressing problem of motor library（Automotive Math and Motor Control Library Set for NXP MC9S12ZVM devices）

[zhoumaokang]

The memory module in the NXP's Motor Library (Automotive Math and Motor Control Library Set for NXP MC9S12ZVM devices) is small (14bit addresses). My project's memory module is medium (16bit addresses). When I use the library function to compile, there will be errors, but if I change the project's memory module to small, the code size will be over 16K. When I download the program to the chip, there will be a failure. Is it an addressing problem?

[ZhangJennie]

HI,

The application memory model MUST match with the library model. Otherwise application project will produce build error. it's normal.

Difference of each memory models:

Small Memory Model - data to be fit in 14-bit addresses (< 16 KB)

Medium Memory Model - data to be fit in 18-bit addresses (< 256 KB)

Large Memory Model - data to be fit in 24-bit addresses

Have a great day,
Jun Zhang

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[zhoumaokang]

HI

Memory modle is the addressing mode of RAM?

Have a great day,

Zhoumao Kang

[ZhangJennie · Accepted solution]

Hi

yes, it affects global non-constant data allocation. All global non-constant data must fit into  RAM.

Have a great day,
Jun Zhang

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