TivaWare驱动库用户指南

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"TivaWare for C Series Peripheral Driver Library用户指南" 这篇文档是Texas Instruments（TI）公司为TM4c123G系列微控制器提供的TivaWare外设驱动库的用户指南。TivaWare库是一个软件开发工具包，专为基于ARM Cortex-M4内核的Tiva C系列微控制器设计，它简化了对这些微控制器硬件外设的操作和编程。文档的版权信息显示，内容由Texas Instruments Incorporated在2006年至2013年间创作并拥有，同时也提到了ARM公司的一些注册商标，如Thumb和Cortex。TI强调，对于其半导体产品的可用性、标准保修以及在关键应用中的使用，有重要的注意事项，这些信息在文档的末尾可以找到。该文档的修订信息显示，这是版本1.0，最后更新于2013年4月11日。文档的内容结构包括多个部分，如： 1. **介绍**：这部分可能涵盖了TivaWare库的基本概念，目标用户，以及为什么选择这个库来开发TM4c123G的应用。 2. **编程模型**：这部分详细介绍了三种不同的编程模型： - **直接寄存器访问模型**：开发者可以直接操作微控制器的硬件寄存器进行低级控制。 - **软件驱动模型**：提供了一层抽象，通过函数调用来操作外设，更易于理解和使用。 - **模型组合**：说明如何根据项目需求结合这两种模型。 3. **模拟比较器**：针对TM4c123G中的模拟比较器外设进行了介绍，可能包括其功能、配置方法以及如何在代码中使用。 4. 其他章节可能涵盖更多的外设，如GPIO（通用输入/输出）、定时器、串行通信接口（如UART、SPI、I2C）、ADC（模数转换器）、PWM（脉宽调制）等，并提供详细的使用指南和示例代码。这个库为开发者提供了丰富的功能和灵活性，使得在TM4c123G上构建高效、可靠的嵌入式系统变得更加便捷。通过TivaWare，开发者可以快速掌握微控制器的外设，缩短开发周期，同时减少错误和调试时间。

Analog Comparator

3.2.2 Function Documentation

3.2.2.1 ComparatorConﬁgure

Conﬁgures a comparator.

Prototype:

void

ComparatorConfigure(uint32_t ui32Base,

uint32_t ui32Comp,

uint32_t ui32Config)

Parameters:

ui32Base is the base address of the comparator module.

ui32Comp is the index of the comparator to conﬁgure.

ui32Conﬁg is the conﬁguration of the comparator.

Description:

This function conﬁgures a comparator. The ui32Conﬁg parameter is the result of a logical

OR operation between the COMP_TRIG_xxx, COMP_INT_xxx, COMP_ASRCP_xxx, and

COMP_OUTPUT_xxx values.

The COMP_TRIG_xxx term can take on the following values:

COMP_TRIG_NONE to have no trigger to the ADC.

COMP_TRIG_HIGH to trigger the ADC when the comparator output is high.

COMP_TRIG_LOW to trigger the ADC when the comparator output is low.

COMP_TRIG_FALL to trigger the ADC when the comparator output goes low.

COMP_TRIG_RISE to trigger the ADC when the comparator output goes high.

COMP_TRIG_BOTH to trigger the ADC when the comparator output goes low or high.

The COMP_INT_xxx term can take on the following values:

COMP_INT_HIGH to generate an interrupt when the comparator output is high.

COMP_INT_LOW to generate an interrupt when the comparator output is low.

COMP_INT_FALL to generate an interrupt when the comparator output goes low.

COMP_INT_RISE to generate an interrupt when the comparator output goes high.

COMP_INT_BOTH to generate an interrupt when the comparator output goes low or high.

The COMP_ASRCP_xxx term can take on the following values:

COMP_ASRCP_PIN to use the dedicated Comp+ pin as the reference voltage.

COMP_ASRCP_PIN0 to use the Comp0+ pin as the reference voltage (this the same as

COMP_ASRCP_PIN for the comparator 0).

COMP_ASRCP_REF to use the internally generated voltage as the reference voltage.

The COMP_OUTPUT_xxx term can take on the following values:

COMP_OUTPUT_NORMAL to enable a non-inverted output from the comparator to a

device pin.

COMP_OUTPUT_INVERT to enable an inverted output from the comparator to a device

pin.

Returns:

None.

16 April 11, 2013

Analog Comparator

Parameters:

ui32Base is the base address of the comparator module.

ui32Ref is the desired reference voltage.

Description:

This function sets the internal reference voltage value. The voltage is speciﬁed as one of the

following values:

COMP_REF_OFF to turn off the reference voltage

COMP_REF_0V to set the reference voltage to 0 V

COMP_REF_0_1375V to set the reference voltage to 0.1375 V

COMP_REF_0_275V to set the reference voltage to 0.275 V

COMP_REF_0_4125V to set the reference voltage to 0.4125 V

COMP_REF_0_55V to set the reference voltage to 0.55 V

COMP_REF_0_6875V to set the reference voltage to 0.6875 V

COMP_REF_0_825V to set the reference voltage to 0.825 V

COMP_REF_0_928125V to set the reference voltage to 0.928125 V

COMP_REF_0_9625V to set the reference voltage to 0.9625 V

COMP_REF_1_03125V to set the reference voltage to 1.03125 V

COMP_REF_1_134375V to set the reference voltage to 1.134375 V

COMP_REF_1_1V to set the reference voltage to 1.1 V

COMP_REF_1_2375V to set the reference voltage to 1.2375 V

COMP_REF_1_340625V to set the reference voltage to 1.340625 V

COMP_REF_1_375V to set the reference voltage to 1.375 V

COMP_REF_1_44375V to set the reference voltage to 1.44375 V

COMP_REF_1_5125V to set the reference voltage to 1.5125 V

COMP_REF_1_546875V to set the reference voltage to 1.546875 V

COMP_REF_1_65V to set the reference voltage to 1.65 V

COMP_REF_1_753125V to set the reference voltage to 1.753125 V

COMP_REF_1_7875V to set the reference voltage to 1.7875 V

COMP_REF_1_85625V to set the reference voltage to 1.85625 V

COMP_REF_1_925V to set the reference voltage to 1.925 V

COMP_REF_1_959375V to set the reference voltage to 1.959375 V

COMP_REF_2_0625V to set the reference voltage to 2.0625 V

COMP_REF_2_165625V to set the reference voltage to 2.165625 V

COMP_REF_2_26875V to set the reference voltage to 2.26875 V

COMP_REF_2_371875V to set the reference voltage to 2.371875 V

Returns:

None.

3.2.2.9 ComparatorValueGet

Gets the current comparator output value.

Prototype:

bool

ComparatorValueGet(uint32_t ui32Base,

uint32_t ui32Comp)

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