通过设置TMC428内部参数寄存器和片内ram的值，可使TMC428能够同时控制三个步进电机，实现三轴控制系统。

To set the proper parameter of register and on-chip ram of TMC428, it can make TMC428 control three stepper motor in the same time, and realize three-axis control system.

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这个空间也用来在溢出情况中使用：如果参数个数多于可用寄存器的数目，那么它们就需要进入堆栈空间中。

This space is also used for overflow: if there are more parameters than registers available for use, then they need to go in the stack space.

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在本例中，第一个也是惟一一个参数已经加载进寄存器3。

In this case, the first and only parameter is already loaded into register 3.

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