/**************************************************************************//**
* [url=home.php?mod=space&uid=288409]@file[/url] main.c
* [url=home.php?mod=space&uid=895143]@version[/url] V1.00
* $Revision: 4 $
* $Date: 14/02/10 3:06p $
* [url=home.php?mod=space&uid=247401]@brief[/url] M051 Series PWM Generator and Capture Timer Driver Sample Code
*
* @note
* Copyright (C) 2014 Nuvoton Technology Corp. All rights reserved.
*
******************************************************************************/
#include <stdio.h>
#include "M051Series.h"
/*---------------------------------------------------------------------------------------------------------*/
/* Macro, type and constant definitions */
/*---------------------------------------------------------------------------------------------------------*/
#define PLLCON_SETTING CLK_PLLCON_50MHz_HXT
#define PLL_CLOCK 50000000
/*---------------------------------------------------------------------------------------------------------*/
/* Global variables */
/*---------------------------------------------------------------------------------------------------------*/
/**
* @brief PWMA IRQ Handler
*
* @param None
*
* [url=home.php?mod=space&uid=266161]@return[/url] None
*
* [url=home.php?mod=space&uid=1543424]@Details[/url] ISR to handle PWMA interrupt event
*/
void PWMA_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(PWMA, 0xF);
else
PWM_DisableOutput(PWMA, 0xF);
out ^= 1;
cnt = 0;
}
// Clear channel 0 period interrupt flag
PWM_ClearPeriodIntFlag(PWMA, 0);
}
void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock */
/*---------------------------------------------------------------------------------------------------------*/
/* Enable Internal RC clock */
CLK_EnableXtalRC(CLK_PWRCON_OSC22M_EN_Msk);
/* Waiting for IRC22M clock ready */
CLK_WaitClockReady(CLK_CLKSTATUS_OSC22M_STB_Msk);
/* Switch HCLK clock source to Internal RC and HCLK source divide 1 */
CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HIRC, CLK_CLKDIV_HCLK(1));
/* Enable external 12MHz XTAL, internal 22.1184MHz */
CLK_EnableXtalRC(CLK_PWRCON_XTL12M_EN_Msk | CLK_PWRCON_OSC22M_EN_Msk);
/* Enable PLL and Set PLL frequency */
CLK_SetCoreClock(PLLCON_SETTING);
/* Waiting for clock ready */
CLK_WaitClockReady(CLK_CLKSTATUS_PLL_STB_Msk | CLK_CLKSTATUS_XTL12M_STB_Msk | CLK_CLKSTATUS_OSC22M_STB_Msk);
/* Switch HCLK clock source to PLL, STCLK to HCLK/2 */
CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_PLL, CLK_CLKDIV_HCLK(2));
/* Enable UART module clock */
CLK_EnableModuleClock(UART0_MODULE);
/* Enable PWM module clock */
CLK_EnableModuleClock(PWM01_MODULE);
CLK_EnableModuleClock(PWM23_MODULE);
/* Select UART module clock source */
CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_HXT, CLK_CLKDIV_UART(1));
/* Select PWM module clock source */
CLK_SetModuleClock(PWM01_MODULE, CLK_CLKSEL1_PWM01_S_HXT, 0);
CLK_SetModuleClock(PWM23_MODULE, CLK_CLKSEL1_PWM23_S_HXT, 0);
/* Reset PWMA channel0~channel3 */
SYS_ResetModule(PWM03_RST);
/* Update System Core Clock */
/* User can use SystemCoreClockUpdate() to calculate PllClock, SystemCoreClock and CycylesPerUs automatically. */
//SystemCoreClockUpdate();
PllClock = PLL_CLOCK; // PLL
SystemCoreClock = PLL_CLOCK / 1; // HCLK
CyclesPerUs = PLL_CLOCK / 1000000; // For SYS_SysTickDelay()
/*---------------------------------------------------------------------------------------------------------*/
/* Init I/O Multi-function */
/*---------------------------------------------------------------------------------------------------------*/
/* Set P3 multi-function pins for UART0 RXD and TXD */
SYS->P3_MFP = SYS_MFP_P30_RXD0 | SYS_MFP_P31_TXD0;
/* Set P2 multi-function pins for PWMA Channel0~3 */
SYS->P2_MFP = SYS_MFP_P20_PWM0 | SYS_MFP_P21_PWM1 | SYS_MFP_P22_PWM2 | SYS_MFP_P23_PWM3;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Main Function */
/*---------------------------------------------------------------------------------------------------------*/
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 */
/* Unlock protected registers */
SYS_UnlockReg();
/* Init System, IP clock and multi-function I/O */
SYS_Init();
/* Lock protected registers */
SYS_LockReg();
/* Init UART to 115200-8n1 for print message */
UART_Open(UART0, 115200);
printf("+------------------------------------------------------------------------+\n");
printf("| PWM Driver Sample Code |\n");
printf("| |\n");
printf("+------------------------------------------------------------------------+\n");
printf(" This sample code will output all PWMA channels with different\n");
printf(" frequency and duty, enable dead zone function of all PWMA pairs.\n");
printf(" And also enable/disable PWM output every 1 second.\n");
printf(" I/O configuration:\n");
printf(" waveform output pin: PWM0(P2.0), PWM1(P2.1), PWM2(P2.2), PWM3(P2.3)\n");
// PWM0 frequency is 100Hz, duty 30%,
PWM_ConfigOutputChannel(PWMA, PWM_CH0, 100, 30);
PWM_EnableDeadZone(PWMA, PWM_CH0, 400);
// PWM2 frequency is 300Hz, duty 50%
PWM_ConfigOutputChannel(PWMA, PWM_CH2, 300, 50);
PWM_EnableDeadZone(PWMA, PWM_CH2, 200);
// Enable output of all PWMA channels
PWM_EnableOutput(PWMA, 0xF);
// Enable PWMA channel 0 period interrupt, use channel 0 to measure time.
PWM_EnablePeriodInt(PWMA, PWM_CH0, 0);
NVIC_EnableIRQ(PWMA_IRQn);
// Start
PWM_Start(PWMA, 0xF);
while(1);
}
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