Fawwaz Nadzmy
mbed library sources. Supersedes mbed-src.
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Diff: targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_timer.c
- Revision:
- 153:9398a535854b
- Parent:
- 152:9a67f0b066fc
diff -r 9a67f0b066fc -r 9398a535854b targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_timer.c
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_timer.c Thu Dec 15 11:48:27 2016 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,229 +0,0 @@
-/**************************************************************************//**
- * @file timer.c
- * @version V1.00
- * $Revision: 6 $
- * $Date: 14/05/29 1:13p $
- * @brief NUC472/NUC442 TIMER driver source file
- *
- * @note
- * Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
-*****************************************************************************/
-#include "NUC472_442.h"
-
-/** @addtogroup NUC472_442_Device_Driver NUC472/NUC442 Device Driver
- @{
-*/
-
-/** @addtogroup NUC472_442_TIMER_Driver TIMER Driver
- @{
-*/
-
-
-/** @addtogroup NUC472_442_TIMER_EXPORTED_FUNCTIONS TIMER Exported Functions
- @{
-*/
-
-/**
- * @brief 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.
- * @param[in] timer The base address of Timer module
- * @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
- * @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 >= 0x4000000) {
- u32Prescale = 7; // real prescaler value is 8
- u32Clk >>= 3;
- } else if(u32Clk >= 0x2000000) {
- u32Prescale = 3; // real prescaler value is 4
- u32Clk >>= 2;
- } else if(u32Clk >= 0x1000000) {
- 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 This API stops Timer counting and disable the Timer interrupt function
- * @param[in] timer The base address of Timer module
- * @return None
- */
-void TIMER_Close(TIMER_T *timer)
-{
- timer->CTL = 0;
- timer->EXTCTL = 0;
-
-}
-
-/**
- * @brief This API is used to create a delay loop for u32usec micro seconds
- * @param[in] timer The base address of Timer module
- * @param[in] u32Usec Delay period in micro seconds with 10 usec every step. Valid values are between 10~1000000 (10 micro second ~ 1 second)
- * @return None
- * @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;
- double fCmpr;
-
- // Clear current timer configuration
- timer->CTL = 0;
- timer->EXTCTL = 0;
-
- if(u32Clk == 10000) { // min delay is 100us if timer clock source is LIRC 10k
- u32Usec = ((u32Usec + 99) / 100) * 100;
- } else { // 10 usec every step
- u32Usec = ((u32Usec + 9) / 10) * 10;
- }
-
- if(u32Clk >= 0x4000000) {
- u32Prescale = 7; // real prescaler value is 8
- u32Clk >>= 3;
- } else if(u32Clk >= 0x2000000) {
- u32Prescale = 3; // real prescaler value is 4
- u32Clk >>= 2;
- } else if(u32Clk >= 0x1000000) {
- u32Prescale = 1; // real prescaler value is 2
- u32Clk >>= 1;
- }
-
- // u32Usec * u32Clk might overflow if using uint32_t
- fCmpr = ((double)u32Usec * (double)u32Clk) / 1000000.0;
-
- timer->CMP = (uint32_t)fCmpr;
- timer->CTL = TIMER_CTL_CNTEN_Msk | u32Prescale; // one shot mode
-
- // 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 This API is used to enable timer capture function with specified mode and capture edge
- * @param[in] timer The base address of Timer module
- * @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 edge. Possible values are
- * - \ref TIMER_CAPTURE_FALLING_EDGE
- * - \ref TIMER_CAPTURE_RISING_EDGE
- * - \ref TIMER_CAPTURE_FALLING_THEN_RISING_EDGE
- * - \ref TIMER_CAPTURE_RISING_THEN_FALLING_EDGE
- * @return None
- * @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 This API is used to disable the Timer capture function
- * @param[in] timer The base address of Timer module
- * @return None
- */
-void TIMER_DisableCapture(TIMER_T *timer)
-{
- timer->EXTCTL &= ~TIMER_EXTCTL_CAPEN_Msk;
-
-}
-
-/**
- * @brief This function is used to enable the Timer counter function with specify detection edge
- * @param[in] timer The base address of Timer module
- * @param[in] u32Edge Detection edge of counter pin. Could be ether
- * - \ref TIMER_COUNTER_RISING_EDGE, or
- * - \ref TIMER_COUNTER_FALLING_EDGE
- * @return None
- * @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 This API is used to disable the Timer event counter function.
- * @param[in] timer The base address of Timer module
- * @return None
- */
-void TIMER_DisableEventCounter(TIMER_T *timer)
-{
- timer->CTL &= ~TIMER_CTL_EXTCNTEN_Msk;
-}
-
-/**
- * @brief This API is used to get the clock frequency of Timer
- * @param[in] timer The base address of Timer module
- * @return Timer clock frequency
- * @note This API cannot return correct clock rate if timer source is 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) {
- if(CLK->CLKSEL0 & CLK_CLKSEL0_PCLKSEL_Msk)
- return(SystemCoreClock / 2);
- else
- return(SystemCoreClock);
- }
-
- return(au32Clk[u32Src]);
-
-}
-
-/*@}*/ /* end of group NUC472_442_TIMER_EXPORTED_FUNCTIONS */
-
-/*@}*/ /* end of group NUC472_442_TIMER_Driver */
-
-/*@}*/ /* end of group NUC472_442_Device_Driver */
-
-/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/