/*----------------------------------------------------------------------------*/
static enum result tmrInit(void *object, const void *configBase)
{
const struct GpTimerConfig * const config = configBase;
const struct GpTimerBaseConfig baseConfig = {
.channel = config->channel
};
struct GpTimer * const timer = object;
enum result res;
assert(config->event < GPTIMER_EVENT_END);
timer->event = config->event ? config->event : GPTIMER_MATCH0;
--timer->event;
/* Call base class constructor */
if ((res = GpTimerBase->init(object, &baseConfig)) != E_OK)
return res;
timer->base.handler = interruptHandler;
timer->callback = 0;
/* Initialize peripheral block */
LPC_TIMER_Type * const reg = timer->base.reg;
reg->TCR = TCR_CRES;
reg->IR = reg->IR; /* Clear pending interrupts */
reg->CCR = 0;
reg->CTCR = 0;
reg->MCR = 0;
updateFrequency(timer, config->frequency);
/* Configure prescaler and default match value */
reg->MR[timer->event] = getMaxValue(timer);
/* Enable external match to generate signals to other peripherals */
reg->EMR = EMR_CONTROL(timer->event, CONTROL_TOGGLE);
#ifdef CONFIG_GPTIMER_PM
if ((res = pmRegister(interface, powerStateHandler)) != E_OK)
return res;
#endif
/* Timer is disabled by default */
reg->TCR = 0;
irqSetPriority(timer->base.irq, config->priority);
irqEnable(timer->base.irq);
return E_OK;
}
/*----------------------------------------------------------------------------*/
static void tmrDeinit(void *object)
{
struct GpTimer * const timer = object;
LPC_TIMER_Type * const reg = timer->base.reg;
irqDisable(timer->base.irq);
reg->TCR = 0;
#ifdef CONFIG_GPTIMER_PM
pmUnregister(interface);
#endif
GpTimerBase->deinit(timer);
}
/*----------------------------------------------------------------------------*/
static void tmrCallback(void *object, void (*callback)(void *), void *argument)
{
struct GpTimer * const timer = object;
LPC_TIMER_Type * const reg = timer->base.reg;
timer->callbackArgument = argument;
timer->callback = callback;
if (callback)
{
reg->IR = reg->IR;
reg->MCR |= MCR_INTERRUPT(timer->event);
}
else
reg->MCR &= ~MCR_INTERRUPT(timer->event);
}
/*----------------------------------------------------------------------------*/
static void tmrSetEnabled(void *object, bool state)
{
struct GpTimer * const timer = object;
LPC_TIMER_Type * const reg = timer->base.reg;
/* Stop the timer */
reg->TCR = 0;
/* Clear pending interrupt flags and direct memory access requests */
reg->IR = IR_MATCH_INTERRUPT(timer->event);
if (state)
{
/* Clear match value to avoid undefined output level */
reg->EMR &= ~EMR_EXTERNAL_MATCH(timer->event);
reg->TCR = TCR_CEN;
}
}
/*----------------------------------------------------------------------------*/
static uint32_t tmrGetFrequency(const void *object)
{
const struct GpTimer * const timer = object;
const LPC_TIMER_Type * const reg = timer->base.reg;
const uint32_t baseClock = gpTimerGetClock((const struct GpTimerBase *)timer);
return baseClock / (reg->PR + 1);
}
/*----------------------------------------------------------------------------*/
static void tmrSetFrequency(void *object, uint32_t frequency)
{
updateFrequency(object, frequency);
}
/*----------------------------------------------------------------------------*/
static enum Result tmrInit(void *object, const void *configBase)
{
const struct GpTimerConfig * const config = configBase;
assert(config);
const struct GpTimerBaseConfig baseConfig = {
.channel = config->channel
};
struct GpTimer * const timer = object;
enum Result res;
assert(config->event < GPTIMER_EVENT_END);
/* Call base class constructor */
if ((res = GpTimerBase->init(timer, &baseConfig)) != E_OK)
return res;
timer->base.handler = interruptHandler;
timer->callback = 0;
timer->event = (config->event ? config->event : GPTIMER_MATCH0) - 1;
/* Initialize peripheral block */
LPC_TIMER_Type * const reg = timer->base.reg;
reg->TCR = TCR_CRES;
reg->IR = reg->IR; /* Clear pending interrupts */
reg->CCR = 0;
reg->CTCR = 0;
timer->frequency = config->frequency;
gpTimerSetFrequency(&timer->base, timer->frequency);
/* Configure prescaler and default match value */
reg->MR[timer->event] = getMaxValue(timer);
/* Reset the timer after reaching the match register value */
reg->MCR = MCR_RESET(timer->event);
/* Enable external match to generate signals to other peripherals */
reg->EMR = EMR_CONTROL(timer->event, CONTROL_TOGGLE);
#ifdef CONFIG_PLATFORM_NXP_GPTIMER_PM
if ((res = pmRegister(powerStateHandler, timer)) != E_OK)
return res;
#endif
/* Clear timer reset flag, but do not enable */
reg->TCR = 0;
irqSetPriority(timer->base.irq, config->priority);
irqEnable(timer->base.irq);
return E_OK;
}
/*----------------------------------------------------------------------------*/
#ifndef CONFIG_PLATFORM_NXP_GPTIMER_NO_DEINIT
static void tmrDeinit(void *object)
{
struct GpTimer * const timer = object;
LPC_TIMER_Type * const reg = timer->base.reg;
irqDisable(timer->base.irq);
reg->TCR = 0;
#ifdef CONFIG_PLATFORM_NXP_GPTIMER_PM
pmUnregister(timer);
#endif
GpTimerBase->deinit(timer);
}
#endif
/*----------------------------------------------------------------------------*/
static void tmrEnable(void *object)
{
struct GpTimer * const timer = object;
LPC_TIMER_Type * const reg = timer->base.reg;
/* Clear pending interrupt flags and direct memory access requests */
reg->IR = IR_MATCH_INTERRUPT(timer->event);
/* Clear match value to avoid undefined output level */
reg->EMR &= ~EMR_EXTERNAL_MATCH(timer->event);
/* Start the timer */
reg->TCR = TCR_CEN;
}
/*----------------------------------------------------------------------------*/
static void tmrDisable(void *object)
{
struct GpTimer * const timer = object;
LPC_TIMER_Type * const reg = timer->base.reg;
reg->TCR = 0;
}
/*----------------------------------------------------------------------------*/
static void tmrSetCallback(void *object, void (*callback)(void *),
void *argument)
{
struct GpTimer * const timer = object;
LPC_TIMER_Type * const reg = timer->base.reg;
timer->callbackArgument = argument;
timer->callback = callback;
if (callback)
{
reg->IR = reg->IR;
reg->MCR |= MCR_INTERRUPT(timer->event);
}
else
reg->MCR &= ~MCR_INTERRUPT(timer->event);
}
/*----------------------------------------------------------------------------*/
static uint32_t tmrGetFrequency(const void *object)
{
const struct GpTimer * const timer = object;
const LPC_TIMER_Type * const reg = timer->base.reg;
const uint32_t baseClock = gpTimerGetClock(&timer->base);
return baseClock / (reg->PR + 1);
}
/*----------------------------------------------------------------------------*/
static void tmrSetFrequency(void *object, uint32_t frequency)
{
struct GpTimer * const timer = object;
timer->frequency = frequency;
gpTimerSetFrequency(&timer->base, timer->frequency);
}
/*----------------------------------------------------------------------------*/
static uint32_t tmrGetOverflow(const void *object)
{
const struct GpTimer * const timer = object;
const LPC_TIMER_Type * const reg = timer->base.reg;
return (reg->MR[timer->event] + 1) & getMaxValue(timer);
}
/*----------------------------------------------------------------------------*/
static void tmrSetOverflow(void *object, uint32_t overflow)
{
struct GpTimer * const timer = object;
LPC_TIMER_Type * const reg = timer->base.reg;
assert(overflow <= getMaxValue(timer));
reg->MR[timer->event] = overflow - 1;
}
/*----------------------------------------------------------------------------*/
static uint32_t tmrGetValue(const void *object)
{
const struct GpTimer * const timer = object;
const LPC_TIMER_Type * const reg = timer->base.reg;
return reg->TC;
}
/*----------------------------------------------------------------------------*/
static void tmrSetValue(void *object, uint32_t value)
{
struct GpTimer * const timer = object;
LPC_TIMER_Type * const reg = timer->base.reg;
assert(value <= reg->MR[timer->event]);
reg->PC = 0;
reg->TC = value;
}