基于 DMA 的 LED 调光
使用DMA将数据从ADC结果寄存器移动到PWM占空比寄存器。DMA 能够将一段数据移动到多个存储器位置。因此，ADC从Curiosity HPC上的POT读取电压电平，DMA能够将这些数据提供给三个不同频率的PWM。
当您转动电位器时，您可以看到 LED 以不同的频率闪烁，但以相同的强度变化。
而主程序几乎不用任何操作
/**
Generated Main Source File
Company:
Microchip Technology Inc.
File Name:
main.c
Summary:
This is the main file generated using PIC10 / PIC12 / PIC16 / PIC18 MCUs
Description:
This header file provides implementations for driver APIs for all modules selected in the GUI.
Generation Information :
Product Revision:PIC10 / PIC12 / PIC16 / PIC18 MCUs - 1.77
Device :PIC18F45K42
Driver Version :2.00
*/
/*
(c) 2018 Microchip Technology Inc. and its subsidiaries.
Subject to your compliance with these terms, you may use Microchip software and any
derivatives exclusively with Microchip products. It is your responsibility to comply with third party
license terms applicable to your use of third party software (including open source software) that
may accompany Microchip software.
THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, WHETHER
EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, INCLUDING ANY
IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, AND FITNESS
FOR A PARTICULAR PURPOSE.
IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE,
INCIDENTAL OR CONSEQUENTIAL LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND
WHATSOEVER RELATED TO THE SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP
HAS BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO
THE FULLEST EXTENT ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL
CLAIMS IN ANY WAY RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT
OF FEES, IF ANY, THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS
SOFTWARE.
*/
#include "mcc_generated_files/mcc.h"
/*
Main application
*/
void main(void)
{
// Initialize the device
SYSTEM_Initialize();
// If using interrupts in PIC18 High/Low Priority Mode you need to enable the Global High and Low Interrupts
// If using interrupts in PIC Mid-Range Compatibility Mode you need to enable the Global Interrupts
// Use the following macros to:
// Enable the Global Interrupts
//INTERRUPT_GlobalInterruptEnable();
// Disable the Global Interrupts
//INTERRUPT_GlobalInterruptDisable();
ADCC_StartConversion(POT);
while (1)
{
// Add your application code
}
}
/**
End of File
*/
只需要在MCC配置好即可，自动完成转换和传送并执行。
怎么只有主函数，具体实现不展示吗 DMA+Pwm经典调光 DMA这么好用。 只要写入就OK，DMA自动完成数据传送。 这是用DMA和哪个外设配合啊
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