求MNIN51 用PWM点LED渐明渐暗示例程序

只看该作者 · 2017-3-14 14:46

请那位大哥提供一个，MNIN51 用PWM点LED渐明渐暗示例程序。开始学习新塘MCU

1万 · 2017-3-14 18:44

/******************************************************************************

 * [url=home.php?mod=space&uid=288409]@file[/url]     main.c

 * [url=home.php?mod=space&uid=895143]@version[/url]  V1.00

 * $Revision: 2 $

 * $Date: 15/09/24 5:28p $

 * [url=home.php?mod=space&uid=247401]@brief[/url]    Demonstrate the PWM double buffer feature.

 *

 * @note

 * Copyright (C) 2015 Nuvoton Technology Corp. All rights reserved.

*****************************************************************************/

#include <stdio.h>

#include "Mini51Series.h"



uint32_t duty30, duty60;

void PWM_IRQHandler(void)

{

    static int toggle = 0;  // First two already fill into PWM, so start from 30%



    // Update PWM channel 0 duty

    if(toggle == 0) {

        PWM_SET_CMR(PWM, 0, duty30);

    } else {

        PWM_SET_CMR(PWM, 0, duty60);

    }

    toggle ^= 1;

    // Clear channel 0 period interrupt flag

    PWM_ClearPeriodIntFlag(PWM, 0);

}







void SYS_Init(void)

{

    /*---------------------------------------------------------------------------------------------------------*/

    /* Init System Clock                                                                                       */

    /*---------------------------------------------------------------------------------------------------------*/



    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Set P5 multi-function pins for XTAL1 and XTAL2 */

    SYS->P5_MFP = SYS_MFP_P50_XTAL1 | SYS_MFP_P51_XTAL2;



    /* Enable external 12MHz XTAL (UART), HIRC */

    CLK->PWRCON = CLK_PWRCON_OSC22M_EN_Msk | CLK_PWRCON_HXT;



    /* Waiting for clock ready */

    CLK_WaitClockReady(CLK_CLKSTATUS_OSC22M_STB_Msk | CLK_CLKSTATUS_XTL_STB_Msk);



    /* Switch HCLK clock source to XTL */

    CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_XTAL,CLK_CLKDIV_HCLK(1));



    /* Enable IP clock */

    CLK->APBCLK = CLK_APBCLK_UART_EN_Msk | CLK_APBCLK_PWM01_EN_Msk;



    /* Select UART clock source from external crystal*/

    CLK->CLKSEL1 = (CLK->CLKSEL1 & ~CLK_CLKSEL1_UART_S_Msk) | CLK_CLKSEL1_UART_S_XTAL;



    /* Update System Core Clock */

    /* User can use SystemCoreClockUpdate() to calculate SystemCoreClock and CycylesPerUs automatically. */

    SystemCoreClockUpdate();





    /*---------------------------------------------------------------------------------------------------------*/

    /* Init I/O Multi-function                                                                                 */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Set P0 multi-function pins for UART RXD, TXD */

    SYS->P0_MFP = SYS_MFP_P00_TXD | SYS_MFP_P01_RXD;





    /* Set P2 multi-function pin for PWM Channel 0  */

    SYS->P2_MFP = SYS_MFP_P22_PWM0;





    /* Lock protected registers */

    SYS_LockReg();

}



int32_t main (void)

{

    /* Init System, IP clock and multi-function I/O

       In the end of SYS_Init() will issue SYS_LockReg()

       to lock protected register. If user want to write

       protected register, please issue SYS_UnlockReg()

       to unlock protected register if necessary */

    SYS_Init();



    /* Init UART to 115200-8n1 for print message */

    UART_Open(UART0, 115200);



    printf("This sample changed PWM0 output between 30%% and 60%% duty ratio\n");

    /*

        PWM channel 0 wave form of this sample changed between 30% and 60% duty ratio

    */

    PWM_ConfigOutputChannel(PWM, 0, 1000, 30);



    // Save 30% duty setting

    duty30 = PWM->CMR[0];

    // Calculate 60% duty setting. CMR store the actual value minus 1.

    duty60 = (duty30 + 1) * 2 - 1;



    // Enable output of all PWM channel 0

    PWM_EnableOutput(PWM, 1);



    // Enable PWM channel 0 period interrupt

    PWM_EnablePeriodInt(PWM, 0, PWM_PERIOD_INT_UNDERFLOW);

    NVIC_EnableIRQ(PWM_IRQn);



    // Start

    PWM_Start(PWM, 0x1);



    // Fill second duty setting immediately after PWM start

    PWM_SET_CMR(PWM, 0, duty60);



    while(1);



}



/*** (C) COPYRIGHT 2015 Nuvoton Technology Corp. ***/

1万 · 2017-3-14 18:45

这个是官方提供的例程序，你可以修改一下就能用了。一会儿再给你个。

1万 · 2017-3-14 18:47

复制



/******************************************************************************

 * @file     main.c

 * @version  V1.00

 * $Revision: 7 $

 * $Date: 15/10/06 1:21p $

 * @brief    Demonstrate the dead-zone feature with PWM.

 *

 * @note

 * Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.

*****************************************************************************/

#include <stdio.h>

#include "Mini51Series.h"





void PWM_IRQHandler(void)

{

    static uint32_t cnt;

    static uint32_t out;



    // Channel 0 frequency is 100Hz, every 1 second enter this IRQ handler 100 times.

    if(++cnt == 100) {

        if(out)

            PWM_EnableOutput(PWM, 0x3F);

        else

            PWM_DisableOutput(PWM, 0x3F);

        out ^= 1;

        cnt = 0;

    }

    // Clear channel 0 period interrupt flag

    PWM_ClearPeriodIntFlag(PWM, 0);

}





void SYS_Init(void)

{

    /*---------------------------------------------------------------------------------------------------------*/

    /* Init System Clock                                                                                       */

    /*---------------------------------------------------------------------------------------------------------*/



    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Set P5 multi-function pins for XTAL1 and XTAL2 */

    SYS->P5_MFP &= ~(SYS_MFP_P50_Msk | SYS_MFP_P51_Msk);

    SYS->P5_MFP |= (SYS_MFP_P50_XTAL1 | SYS_MFP_P51_XTAL2);



    /* Enable external 12MHz XTAL, internal 22.1184MHz */

    CLK->PWRCON = CLK_PWRCON_XTL12M | CLK_PWRCON_IRC22M_EN_Msk;



    /* Waiting for clock ready */

    CLK_WaitClockReady(CLK_CLKSTATUS_XTL_STB_Msk | CLK_CLKSTATUS_IRC22M_STB_Msk);



    /* Enable IP clock */

    CLK->APBCLK = CLK_APBCLK_UART_EN_Msk | CLK_APBCLK_PWM01_EN_Msk | CLK_APBCLK_PWM23_EN_Msk | CLK_APBCLK_PWM45_EN_Msk;



    /* Select UART clock source from external crystal*/

    CLK->CLKSEL1 = (CLK->CLKSEL1 & ~CLK_CLKSEL1_UART_S_Msk) | CLK_CLKSEL1_UART_S_XTAL;



    /* Update System Core Clock */

    /* User can use SystemCoreClockUpdate() to calculate SystemCoreClock and CycylesPerUs automatically. */

    SystemCoreClockUpdate();





    /*---------------------------------------------------------------------------------------------------------*/

    /* Init I/O Multi-function                                                                                 */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Set P1 multi-function pins for UART RXD, TXD */

    SYS->P0_MFP = SYS_MFP_P00_TXD | SYS_MFP_P01_RXD;



    /* Set P0 multi-function pins for PWM Channel 5  */

    SYS->P0_MFP = SYS_MFP_P04_PWM5;

    /* Set P2 multi-function pins for PWM Channel 0~4  */

    SYS->P2_MFP = SYS_MFP_P22_PWM0 | SYS_MFP_P23_PWM1 | SYS_MFP_P24_PWM2 | SYS_MFP_P25_PWM3 | SYS_MFP_P26_PWM4;





    /* Lock protected registers */

    SYS_LockReg();

}





int32_t main (void)

{

    /* Init System, IP clock and multi-function I/O

       In the end of SYS_Init() will issue SYS_LockReg()

       to lock protected register. If user want to write

       protected register, please issue SYS_UnlockReg()

       to unlock protected register if necessary */

    SYS_Init();



    /* Init UART to 115200-8n1 for print message */

    UART_Open(UART, 115200);



    printf("\nThis sample code will output PWM channel 0 to with different\n");

    printf("frequency and duty, enable dead zone function of all PWM pairs.\n");

    printf("And also enable/disable PWM output every 1 second.\n");

    // PWM0 frequency is 100Hz, duty 30%,

    PWM_ConfigOutputChannel(PWM, 0, 100, 30);

    PWM_EnableDeadZone(PWM, 0, 400);



    // PWM2 frequency is 300Hz, duty 50%

    PWM_ConfigOutputChannel(PWM, 2, 300, 50);

    PWM_EnableDeadZone(PWM, 2, 200);



    // PWM4 frequency is 500Hz, duty 70%

    PWM_ConfigOutputChannel(PWM, 4, 600, 70);

    PWM_EnableDeadZone(PWM, 4, 100);



    // Enable output of all PWM channels

    PWM_EnableOutput(PWM, 0x3F);



    // Enable PWM channel 0 period interrupt, use channel 0 to measure time.

    PWM_EnablePeriodInt(PWM, 0, 0);

    NVIC_EnableIRQ(PWM_IRQn);



    // Start

    PWM_Start(PWM, 0x3F);



    while(1);



}



/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/