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Tiva Timer: Add interfaces to start/stop timers and to set the interval load registers.

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This commit is contained in:
Gregory Nutt 2015-01-09 11:07:52 -06:00
parent db556691f3
commit c092ecb131
2 changed files with 202 additions and 1 deletions
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53
arch/arm/src/tiva/tiva_timer.c
View File

@ -1349,3 +1349,56 @@ TIMER_HANDLE tiva_gptm_configure(const struct tiva_gptmconfig_s *config)
return ret < 0 ? (TIMER_HANDLE)NULL : (TIMER_HANDLE)priv;
}
/****************************************************************************
* Name: tiva_gptm_putreg
*
* Description:
* This function permits setting of any timer register by its offset into
* the timer block. Its primary purpose is to support inline functions
* defined in this header file.
*
****************************************************************************/
void tiva_gptm_putreg(TIMER_HANDLE handle, unsigned int offset, uint32_t value)
{
DEBUGASSERT(handle);
tiva_putreg((struct tiva_gptmstate_s *)handle, offset, value);
}
/****************************************************************************
* Name: tiva_gptm_getreg
*
* Description:
* This function permits reading of any timer register by its offset into
* the timer block. Its primary purpose is to support inline functions
* defined in this header file.
*
****************************************************************************/
uint32_t tiva_gptm_getreg(TIMER_HANDLE handle, unsigned int offset)
{
DEBUGASSERT(handle);
return tiva_getreg((struct tiva_gptmstate_s *)handle, offset);
}
/****************************************************************************
* Name: tiva_gptm_modifyreg
*
* Description:
* This function permits atomic of any timer register by its offset into
* the timer block. Its primary purpose is to support inline functions
* defined in this header file.
*
****************************************************************************/
void tiva_gptm_modifyreg(TIMER_HANDLE handle, unsigned int offset,
uint32_t clrbits, uint32_t setbits)
{
struct tiva_gptmstate_s *priv = (struct tiva_gptmstate_s *)handle;
uintptr_t regaddr;
DEBUGASSERT(priv && priv->attr);
regaddr = priv->attr->base + offset;
modifyreg32(regaddr, clrbits, setbits);
}

150
arch/arm/src/tiva/tiva_timer.h
View File

@ -255,6 +255,151 @@ struct tiva_gptm16config_s
TIMER_HANDLE tiva_gptm_configure(const struct tiva_gptmconfig_s *gptm);
/****************************************************************************
* Name: tiva_gptm_putreg
*
* Description:
* This function permits setting of any timer register by its offset into
* the timer block. Its primary purpose is to support inline functions
* defined in this header file.
*
****************************************************************************/
void tiva_gptm_putreg(TIMER_HANDLE handle, unsigned int offset, uint32_t value);
/****************************************************************************
* Name: tiva_gptm_getreg
*
* Description:
* This function permits reading of any timer register by its offset into
* the timer block. Its primary purpose is to support inline functions
* defined in this header file.
*
****************************************************************************/
uint32_t tiva_gptm_getreg(TIMER_HANDLE handle, unsigned int offset);
/****************************************************************************
* Name: tiva_gptm_modifyreg
*
* Description:
* This function permits atomic of any timer register by its offset into
* the timer block. Its primary purpose is to support inline functions
* defined in this header file.
*
****************************************************************************/
void tiva_gptm_modifyreg(TIMER_HANDLE handle, unsigned int offset,
uint32_t clrbits, uint32_t setbits);
/****************************************************************************
* Name: tiva_timer32_start
*
* Description:
* After tiva_gptm_configure() has been called to configure a 32-bit timer,
* this function must be called to start the timer(s).
*
****************************************************************************/
static inline void tiva_timer32_start(TIMER_HANDLE handle)
{
/* Set the TAEN bit in the GPTMCTL register to enable the timer and start
* counting
*/
tiva_gptm_modifyreg(handle, TIVA_TIMER_CTL_OFFSET, 0, TIMER_CTL_TAEN);
}
/****************************************************************************
* Name: tiva_timer16_start
*
* Description:
* After tiva_gptm_configure() has been called to configure 16-bit timer(s),
* this function must be called to start one 16-bit timer.
*
****************************************************************************/
static inline void tiva_timer16_start(TIMER_HANDLE handle, int tmndx)
{
uint32_t setbits = tmndx ? TIMER_CTL_TBEN : TIMER_CTL_TAEN;
/* Set the TnEN bit in the GPTMCTL register to enable the timer and start
* counting
*/
tiva_gptm_modifyreg(handle, TIVA_TIMER_CTL_OFFSET, 0, setbits);
}
/****************************************************************************
* Name: tiva_timer32_stop
*
* Description:
* After tiva_timer32_start() has been called to start a 32-bit timer,
* this function may be called to stop the timer.
*
****************************************************************************/
static inline void tiva_timer32_stop(TIMER_HANDLE handle)
{
/* Clear the TAEN bit in the GPTMCTL register to enable the timer and
* start counting
*/
tiva_gptm_modifyreg(handle, TIVA_TIMER_CTL_OFFSET, TIMER_CTL_TAEN, 0);
}
/****************************************************************************
* Name: tiva_timer16_stop
*
* Description:
* After tiva_timer32_start() has been called to start a 16-bit timer,
* this function may be called to stop the timer.
*
****************************************************************************/
static inline void tiva_timer16_stop(TIMER_HANDLE handle, int tmndx)
{
uint32_t clrbits = tmndx ? TIMER_CTL_TBEN : TIMER_CTL_TAEN;
/* Clear the TAEN bit in the GPTMCTL register to enable the timer and
* start counting
*/
tiva_gptm_modifyreg(handle, TIVA_TIMER_CTL_OFFSET, clrbits, 0);
}
/****************************************************************************
* Name: tiva_timer32_setload
*
* Description:
* This function may be called at any time to change the timer interval
* load value of a 32-bit timer.
*
****************************************************************************/
static inline void tiva_timer32_setload(TIMER_HANDLE handle, uint32_t load)
{
tiva_gptm_putreg(handle, TIVA_TIMER_TAILR_OFFSET, load);
}
/****************************************************************************
* Name: tiva_timer16_setload
*
* Description:
* This function may be called at any time to change the timer interval
* load value of a 16-bit timer.
*
****************************************************************************/
static inline void tiva_timer16_setload(TIMER_HANDLE handle, uint16_t load,
int tmndx)
{
unsigned int regoffset =
tmndx ? TIVA_TIMER_TBILR_OFFSET : TIVA_TIMER_TAILR_OFFSET;
tiva_gptm_putreg(handle, regoffset, load);
}
/****************************************************************************
* Name: tiva_gptm0_synchronize
*
@ -263,6 +408,9 @@ TIMER_HANDLE tiva_gptm_configure(const struct tiva_gptmconfig_s *gptm);
*
****************************************************************************/
int tiva_gptm0_synchronize(uint32_t sync);
static inline void tiva_gptm0_synchronize(uint32_t sync)
{
putreg32(sync, TIVA_TIMER0_SYNC);
}
#endif /* __ARCH_ARM_SRC_TIVA_TIVA_TIMER_H */