#include <stdio.h>
#include "NuMicro.h"
void TMR0_IRQHandler(void)
{
// printf("Count 1000 falling events! Test complete !\n");
TIMER_ClearIntFlag(TIMER0);
}
void SYS_Init(void)
{
/* Unlock protected registers */
SYS_UnlockReg();
/* Enable HIRC */
CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
/* Waiting for HIRC clock ready */
CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
/* Switch HCLK clock source to HIRC */
CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
/* Set both PCLK0 and PCLK1 as HCLK/2 */
CLK->PCLKDIV = (CLK_PCLKDIV_APB0DIV_DIV2 | CLK_PCLKDIV_APB1DIV_DIV2);
/* Switch UART0 clock source to HIRC */
CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART0SEL_HIRC, CLK_CLKDIV0_UART0(1));
/* Enable UART peripheral clock */
CLK_EnableModuleClock(UART0_MODULE);
/* Enable IP clock */
CLK_EnableModuleClock(TMR0_MODULE);
/* Select IP clock source */
CLK_SetModuleClock(TMR0_MODULE, CLK_CLKSEL1_TMR0SEL_HIRC, 0);
/* Update System Core Clock */
/* User can use SystemCoreClockUpdate() to calculate PllClock, SystemCoreClock and CycylesPerUs automatically. */
SystemCoreClockUpdate();
/*----------------------------------------------------------------------*/
/* Init I/O Multi-function */
/*----------------------------------------------------------------------*/
/* Set GPB multi-function pins for UART0 RXD and TXD */
SYS->GPB_MFPH = (SYS->GPB_MFPH & ~(SYS_GPB_MFPH_PB12MFP_Msk | SYS_GPB_MFPH_PB13MFP_Msk)) |
(SYS_GPB_MFPH_PB12MFP_UART0_RXD | SYS_GPB_MFPH_PB13MFP_UART0_TXD);
/* Set timer event counting pin */
// SYS->GPB_MFPL = (SYS->GPB_MFPL & ~(SYS_GPB_MFPL_PB5MFP_Msk)) |
// (SYS_GPB_MFPL_PB5MFP_TM0);
/* Lock protected registers */
SYS_LockReg();
}
/*----------------------------------------------------------------------*/
/* Init UART0 */
/*----------------------------------------------------------------------*/
void UART0_Init(void)
{
/* Reset UART0 */
SYS_ResetModule(UART0_RST);
/* Configure UART0 and set UART0 baud rate */
UART_Open(UART0, 115200);
}
int main(void)
{
int i;
/* Init System, IP clock and multi-function I/O. */
SYS_Init();
/* Init UART0 for printf */
UART0_Init();
printf("\nThis sample code use TM0 (PB.5) to count PB.4 input event\n");
printf("Please connect PB.5 to PB.4, press any key to continue\n");
// PB4 = 0; /* Set init state to high */
// GPIO_SetMode(PB, BIT4, GPIO_MODE_OUTPUT);
GPIO_SetMode(PB, BIT14, GPIO_MODE_OUTPUT);
/* Give a dummy target frequency here. Will over write prescale and compare value with macro */
TIMER_Open(TIMER0, TIMER_ONESHOT_MODE, 1);
/* Update prescale and compare value to what we need in event counter mode. */
TIMER_SET_PRESCALE_VALUE(TIMER0, 0);
TIMER_SET_CMP_VALUE(TIMER0, 56789);
/* Counter increase on falling edge */
// TIMER_EnableEventCounter(TIMER0, TIMER_COUNTER_FALLING_EDGE);
/* Start Timer 0 */
TIMER_Start(TIMER0);
/* Enable timer interrupt */
TIMER_EnableInt(TIMER0);
NVIC_EnableIRQ(TMR0_IRQn);
if(TIMER_GetCounter(TIMER0) == 56789)
{
for(i = 0; i < 10; i++)
{
PB14 ^= 1;
}
}
while(1);
}
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