- /******************************************************************************
- * [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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