基于DSP可编程控制器底层驱动软件的设计
关键词 DSP TMS320x281x GPIO SCI TLC1543 MAX5322 底层驱动函数 Title Design of DSP-based low-level functions
Abstract
My graduation design is based on DSP of TMS320x281x,which is produced by
TI corporation.I research on four modules of the DSP:GPIO module,SCI
module ,ADC module and DAC module.In fact,the use of hardware modules is
that reading and writing registers.Therefore,if you want to use these
modules,you must define registers which is associated with these
modules.Then,you can configure these registers to do what you
want.Regarding GPIO module,you should configure the corresponding
registers to set GPIO pins to digital I/O and peripheral I/O.Digital I/O
pins are to complete the input and output of digital data. Peripheral I/O
pins are to complete the input and output of peripheral data(for
example,the peripheral I/O pins which are input and output pins of SCI
module are used to communicate with the port of RS232). Regarding SCI
module,this module is used to communicate with the port of RS232.Regarding
ADC module,I use TLC1543 to do analog to digital conversion.The result of
analog to digital conversion is transmitted to high-level communication
program using SCI module.Regarding DAC module,I use MAX5322 to do digital
to analog conversion.
Keywords DSP TMS320x281x GPIO SCI TLC1543 MAX5322 low-level
functions
目 次
1 引言 1
1.1 研究的问题和意义 2
2 基于 DSP 的可编程控制器的总体设计 3
2.1 DSP 的特点 3
2.2 DSP 控制器的硬件结构 3
2.3 DSP 控制器的软件结构 6
3 通信模块 7
3.1 通用数字输入输出模块 7
3.2 异步串行通信模块 10
4 模数转换模块和数模转换模块 21
4.1 模数转换模块 22
4.2 数模转换模块 27
结论 32
致谢 32
参考文献 33
1 引言
在 20世纪60 年代，随着小型计算机的出现，人们曾试想用其代替继电器进行工
业控制，但发现用小型计算机进行工业控制不仅输入输出电路不匹配，而且编程复杂，
无法推广。因此为了实现简单有效的工业控制，人们研制出了可编程控制器，简称 PLC
（Programmable Logic Controller）。可编程控制器由微处理器、存储器、输入输出
单元、编程器和电源组成，具有可靠性高、易文修、灵活方便、编程简单等特点，这