本帖最后由 FSL_TICS_A 于 2014-8-7 14:51 编辑
代码如下：
#include <hidef.h> /* common defines and macros */
#include "derivative.h" /* derivative-specific definitions */
/******************************************************************************
Function Name : TIM0ISR
Engineer : r59709
Date : 06/26/2009
Notes : Interrupt service routine for Timer channel 0.
******************************************************************************/
#pragma CODE_SEG NON_BANKED
#pragma TRAP_PROC
void interrupt VectorNumber_Vtimch0 TIM0ISR(void)
{
PTP_PTP0 ^= 1; /* Toggle Port T4 to show output compare occured.*/
T标志寄存器1 = T标志寄存器1_C0F_MASK; /* Clear channel 0 flag. */
}
#pragma CODE_SEG DEFAULT
/******************************************************************************
Function Name : TIM1ISR
Engineer : r59709
Date : 06/26/2009
Notes : Interrupt service routine for Timer channel 1.
******************************************************************************/
#pragma CODE_SEG NON_BANKED
#pragma TRAP_PROC
void interrupt VectorNumber_Vtimch1 TIM1ISR(void)
{
PTP_PTP1 ^= 1; /* Toggle Port T5 to show output compare occured.*/
T标志寄存器1 = T标志寄存器1_C1F_MASK; /* Clear channel 1 flag. */
}
#pragma CODE_SEG DEFAULT
/******************************************************************************
Function Name : TIM3ISR
Engineer : r59709
Date : 06/26/2009
Notes : Interrupt service routine for Timer channel 3.
******************************************************************************/
#pragma CODE_SEG NON_BANKED
#pragma TRAP_PROC
void interrupt VectorNumber_Vtimch3 TIM3ISR(void)
{
PTP_PTP3 ^= 1; /* Toggle Port P3 to show input capture occured.*/
T标志寄存器1 = T标志寄存器1_C3F_MASK; /* Clear channel 3 flag. */
}
#pragma CODE_SEG DEFAULT
/******************************************************************************
Function Name : Perform_Output_Compare
Engineer : r59709
Date : 06/26/2009
Notes : Function to setup Timer module for output compare.
******************************************************************************/
void Perform_Output_Compare(void)
{
PTP_PTP0 = 1;
PTP_PTP1 = 1;
DDRP_DDRP0 = 1;
DDRP_DDRP1 = 1;
TSCR1_TEN = 0; /* Disable Timer module before adjusting registers. */
TIOS_IOS0 = 1; /* Set Channel 0 as output compare. */
TCTL2_OM0 = 0; /* Set channel 0 to toggle when a Timer match occurs. */
TCTL2_OL0 = 1; /* Set channel 0 to toggle when a Timer match occurs. */
TC0 = 0x8000; /* Set a value for channel 0 timer compare. */
TIE_C0I = 1; /* Enable channel 0 interrupt, handled by function TIM0ISR. */
TIOS_IOS1 = 1; /* Set Channel 1 as output compare. */
TCTL2_OM1 = 0; /* Set channel 1 to toggle when a Timer match occurs. */
TCTL2_OL1 = 1; /* Set channel 1 to toggle when a Timer match occurs. */
TC1 = 0xFFFF; /* Set channel 1 timer compare. */
TIE_C1I = 1; /* Enable channel 1 interrupt, handled by function TIM1ISR. */
TSCR1_TSWAI = 1;/* Disables the timer module while in wait mode. */
TSCR1_TSFRZ = 1;/* Disables the timer counter while in freeze mode. */
////TSCR1_PRNT = 1; //在这里使能精度定时分频不起作用
PTPSR = 24;
////TSCR2_PR = 0x6; /* Set prescaler to divide by 64 */
TSCR1_TEN = 1; /* Timer Enable. */
}
/******************************************************************************
Function Name : Perform_Input_Capture
Engineer : r59709
Date : 06/26/2009
Notes : Timer channel 3 is set as an any-edge input capture.
******************************************************************************/
void Allow_Input_Capture(void)
{
PTP_PTP3 = 1; /* To be used to indicate Input capture status on LED4 */
DDRP_DDRP3 = 1; /* Set P3 as output, the state of P3 will be toggled in TIM3ISR */
PPST_PPST3 = 1; /* Set Port T3 pull device polarity as low */
PERT_PERT3 = 1; /* Enable Port T3 pull device. */
TSCR1_TEN = 0; /* Disable timer module before adjusting registers. */
TIOS_IOS3 = 0; /* Set Channel 3 as input capture. */
TCTL4_EDG3A = 1; /* Set channel 3 to capture any edge transition. */
TCTL4_EDG3B = 1; /* Set channel 3 to capture any edge transition. */
TIE_C3I = 1; /* Enable channel 3 interrupt, handled by function TIM3ISR.*/
TSCR1_TSWAI = 1; /* Disables the timer module while in wait mode. */
TSCR1_TSFRZ = 1; /* Disables the timer counter while in freeze mode. */
TSCR2_PR = 0x6; /* Set prescaler to divide by 64. */
TSCR1_TEN = 1; /* Timer Enable. */
}
/******************************************************************************
Function Name : main
Engineer : b30269
Date : 09/19/2011
Notes : Main procedure that calls initialization routines to:
1.- Configure OC0 and OC1 to toggle at a .7Hz, (output is
shown at P0 and P1 for LED1 and LED2)
2.- Configure IC3 to generate an interrupt when any transition
is detected at T3 (IOC3), output is shown at P3 for LED4.
.
******************************************************************************/
void main(void)
{
TSCR1_PRNT = 1; //在这里使能精度定时分频可以
Perform_Output_Compare();
EnableInterrupts;
for(;;)
{
_FEED_COP(); /* feeds the dog */
} /* loop forever */
/* please make sure that you never leave main */
}
问题：见注解红色字体，为什么会出现这种情况，这个位只能在复位写一次。
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