/******************************************************************************
* [url=home.php?mod=space&uid=288409]@file[/url] main.c
* [url=home.php?mod=space&uid=895143]@version[/url] V1.00
* $Revision: 7 $
* $Date: 15/10/06 1:21p $
* [url=home.php?mod=space&uid=247401]@brief[/url] 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. ***/
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