Fawwaz Nadzmy
mbed library sources. Supersedes mbed-src.
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mbed official
Diff: targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_timer.c
- Revision:
- 153:9398a535854b
- Parent:
- 152:9a67f0b066fc
diff -r 9a67f0b066fc -r 9398a535854b targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_timer.c
--- a/targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_timer.c Thu Dec 15 11:48:27 2016 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,292 +0,0 @@
-/**************************************************************************//**
- * @file timer.c
- * @version V3.00
- * $Revision: 6 $
- * $Date: 15/08/11 10:26a $
- * @brief M451 series Timer driver source file
- *
- * @note
- * Copyright (C) 2013~2015 Nuvoton Technology Corp. All rights reserved.
-*****************************************************************************/
-#include "M451Series.h"
-
-
-/** @addtogroup Standard_Driver Standard Driver
- @{
-*/
-
-/** @addtogroup TIMER_Driver TIMER Driver
- @{
-*/
-
-/** @addtogroup TIMER_EXPORTED_FUNCTIONS TIMER Exported Functions
- @{
-*/
-
-/**
- * @brief Open Timer with Operate Mode and Frequency
- *
- * @param[in] timer The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
- * @param[in] u32Mode Operation mode. Possible options are
- * - \ref TIMER_ONESHOT_MODE
- * - \ref TIMER_PERIODIC_MODE
- * - \ref TIMER_TOGGLE_MODE
- * - \ref TIMER_CONTINUOUS_MODE
- * @param[in] u32Freq Target working frequency
- *
- * @return Real timer working frequency
- *
- * @details This API is used to configure timer to operate in specified mode and frequency.
- * If timer cannot work in target frequency, a closest frequency will be chose and returned.
- * @note After calling this API, Timer is \b NOT running yet. But could start timer running be calling
- * \ref TIMER_Start macro or program registers directly.
- */
-uint32_t TIMER_Open(TIMER_T *timer, uint32_t u32Mode, uint32_t u32Freq)
-{
- uint32_t u32Clk = TIMER_GetModuleClock(timer);
- uint32_t u32Cmpr = 0, u32Prescale = 0;
-
- // Fastest possible timer working freq is (u32Clk / 2). While cmpr = 2, pre-scale = 0.
- if(u32Freq > (u32Clk / 2))
- {
- u32Cmpr = 2;
- }
- else
- {
- if(u32Clk > 64000000)
- {
- u32Prescale = 7; // real prescaler value is 8
- u32Clk >>= 3;
- }
- else if(u32Clk > 32000000)
- {
- u32Prescale = 3; // real prescaler value is 4
- u32Clk >>= 2;
- }
- else if(u32Clk > 16000000)
- {
- u32Prescale = 1; // real prescaler value is 2
- u32Clk >>= 1;
- }
-
- u32Cmpr = u32Clk / u32Freq;
- }
-
- timer->CTL = u32Mode | u32Prescale;
- timer->CMP = u32Cmpr;
-
- return(u32Clk / (u32Cmpr * (u32Prescale + 1)));
-}
-
-/**
- * @brief Stop Timer Counting
- *
- * @param[in] timer The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
- *
- * @return None
- *
- * @details This API stops timer counting and disable all timer interrupt function.
- */
-void TIMER_Close(TIMER_T *timer)
-{
- timer->CTL = 0;
- timer->EXTCTL = 0;
-}
-
-/**
- * @brief Create a specify Delay Time
- *
- * @param[in] timer The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
- * @param[in] u32Usec Delay period in micro seconds. Valid values are between 100~1000000 (100 micro second ~ 1 second).
- *
- * @return None
- *
- * @details This API is used to create a delay loop for u32usec micro seconds by using timer one-shot mode.
- * @note This API overwrites the register setting of the timer used to count the delay time.
- * @note This API use polling mode. So there is no need to enable interrupt for the timer module used to generate delay.
- */
-void TIMER_Delay(TIMER_T *timer, uint32_t u32Usec)
-{
- uint32_t u32Clk = TIMER_GetModuleClock(timer);
- uint32_t u32Prescale = 0, delay = (SystemCoreClock / u32Clk) + 1;
- uint32_t u32Cmpr, u32NsecPerTick;
-
- // Clear current timer configuration/
- timer->CTL = 0;
- timer->EXTCTL = 0;
-
- if(u32Clk <= 1000000) // min delay is 1000 us if timer clock source is <= 1 MHz
- {
- if(u32Usec < 1000)
- u32Usec = 1000;
- if(u32Usec > 1000000)
- u32Usec = 1000000;
- }
- else
- {
- if(u32Usec < 100)
- u32Usec = 100;
- if(u32Usec > 1000000)
- u32Usec = 1000000;
- }
-
- if(u32Clk <= 1000000)
- {
- u32Prescale = 0;
- u32NsecPerTick = 1000000000 / u32Clk;
- u32Cmpr = (u32Usec * 1000) / u32NsecPerTick;
- }
- else
- {
- if(u32Clk > 64000000)
- {
- u32Prescale = 7; // real prescaler value is 8
- u32Clk >>= 3;
- }
- else if(u32Clk > 32000000)
- {
- u32Prescale = 3; // real prescaler value is 4
- u32Clk >>= 2;
- }
- else if(u32Clk > 16000000)
- {
- u32Prescale = 1; // real prescaler value is 2
- u32Clk >>= 1;
- }
-
- if(u32Usec < 250)
- {
- u32Cmpr = (u32Usec * u32Clk) / 1000000;
- }
- else
- {
- u32NsecPerTick = 1000000000 / u32Clk;
- u32Cmpr = (u32Usec * 1000) / u32NsecPerTick;
- }
- }
-
- timer->CMP = u32Cmpr;
- timer->CTL = TIMER_CTL_CNTEN_Msk | TIMER_ONESHOT_MODE | u32Prescale;
-
- // When system clock is faster than timer clock, it is possible timer active bit cannot set in time while we check it.
- // And the while loop below return immediately, so put a tiny delay here allowing timer start counting and raise active flag.
- for(; delay > 0; delay--)
- {
- __NOP();
- }
-
- while(timer->CTL & TIMER_CTL_ACTSTS_Msk);
-}
-
-/**
- * @brief Enable Timer Capture Function
- *
- * @param[in] timer The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
- * @param[in] u32CapMode Timer capture mode. Could be
- * - \ref TIMER_CAPTURE_FREE_COUNTING_MODE
- * - \ref TIMER_CAPTURE_COUNTER_RESET_MODE
- * @param[in] u32Edge Timer capture trigger edge. Possible values are
- * - \ref TIMER_CAPTURE_FALLING_EDGE
- * - \ref TIMER_CAPTURE_RISING_EDGE
- * - \ref TIMER_CAPTURE_FALLING_AND_RISING_EDGE
- *
- * @return None
- *
- * @details This API is used to enable timer capture function with specify capture trigger edge \n
- * to get current counter value or reset counter value to 0.
- * @note Timer frequency should be configured separately by using \ref TIMER_Open API, or program registers directly.
- */
-void TIMER_EnableCapture(TIMER_T *timer, uint32_t u32CapMode, uint32_t u32Edge)
-{
-
- timer->EXTCTL = (timer->EXTCTL & ~(TIMER_EXTCTL_CAPFUNCS_Msk | TIMER_EXTCTL_CAPEDGE_Msk)) |
- u32CapMode | u32Edge | TIMER_EXTCTL_CAPEN_Msk;
-}
-
-/**
- * @brief Disable Timer Capture Function
- *
- * @param[in] timer The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
- *
- * @return None
- *
- * @details This API is used to disable the timer capture function.
- */
-void TIMER_DisableCapture(TIMER_T *timer)
-{
- timer->EXTCTL &= ~TIMER_EXTCTL_CAPEN_Msk;
-}
-
-/**
- * @brief Enable Timer Counter Function
- *
- * @param[in] timer The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
- * @param[in] u32Edge Detection edge of counter pin. Could be ether
- * - \ref TIMER_COUNTER_FALLING_EDGE, or
- * - \ref TIMER_COUNTER_RISING_EDGE
- *
- * @return None
- *
- * @details This function is used to enable the timer counter function with specify detection edge.
- * @note Timer compare value should be configured separately by using \ref TIMER_SET_CMP_VALUE macro or program registers directly.
- * @note While using event counter function, \ref TIMER_TOGGLE_MODE cannot set as timer operation mode.
- */
-void TIMER_EnableEventCounter(TIMER_T *timer, uint32_t u32Edge)
-{
- timer->EXTCTL = (timer->EXTCTL & ~TIMER_EXTCTL_CNTPHASE_Msk) | u32Edge;
- timer->CTL |= TIMER_CTL_EXTCNTEN_Msk;
-}
-
-/**
- * @brief Disable Timer Counter Function
- *
- * @param[in] timer The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
- *
- * @return None
- *
- * @details This API is used to disable the timer event counter function.
- */
-void TIMER_DisableEventCounter(TIMER_T *timer)
-{
- timer->CTL &= ~TIMER_CTL_EXTCNTEN_Msk;
-}
-
-/**
- * @brief Get Timer Clock Frequency
- *
- * @param[in] timer The pointer of the specified Timer module. It could be TIMER0, TIMER1, TIMER2, TIMER3.
- *
- * @return Timer clock frequency
- *
- * @details This API is used to get the timer clock frequency.
- * @note This API cannot return correct clock rate if timer source is from external clock input.
- */
-uint32_t TIMER_GetModuleClock(TIMER_T *timer)
-{
- uint32_t u32Src;
- const uint32_t au32Clk[] = {__HXT, __LXT, 0, 0, 0, __LIRC, 0, __HIRC};
-
- if(timer == TIMER0)
- u32Src = (CLK->CLKSEL1 & CLK_CLKSEL1_TMR0SEL_Msk) >> CLK_CLKSEL1_TMR0SEL_Pos;
- else if(timer == TIMER1)
- u32Src = (CLK->CLKSEL1 & CLK_CLKSEL1_TMR1SEL_Msk) >> CLK_CLKSEL1_TMR1SEL_Pos;
- else if(timer == TIMER2)
- u32Src = (CLK->CLKSEL1 & CLK_CLKSEL1_TMR2SEL_Msk) >> CLK_CLKSEL1_TMR2SEL_Pos;
- else // Timer 3
- u32Src = (CLK->CLKSEL1 & CLK_CLKSEL1_TMR3SEL_Msk) >> CLK_CLKSEL1_TMR3SEL_Pos;
-
- if(u32Src == 2)
- {
- return (SystemCoreClock);
- }
-
- return (au32Clk[u32Src]);
-}
-
-/*@}*/ /* end of group TIMER_EXPORTED_FUNCTIONS */
-
-/*@}*/ /* end of group TIMER_Driver */
-
-/*@}*/ /* end of group Standard_Driver */
-
-/*** (C) COPYRIGHT 2013~2015 Nuvoton Technology Corp. ***/