static void rt1052_hwtimer_init(rt_hwtimer_t *timer, rt_uint32_t state)
{
GPT_Type *hwtimer_dev;
gpt_config_t gptConfig;
hwtimer_dev = (GPT_Type *)timer->parent.user_data;
RT_ASSERT(timer != RT_NULL);
GPT_Deinit(hwtimer_dev);
if (state == 1)
{
/*Clock setting for GPT*/
CLOCK_SetMux(kCLOCK_PerclkMux, EXAMPLE_GPT_CLOCK_SOURCE_SELECT);
CLOCK_SetDiv(kCLOCK_PerclkDiv, EXAMPLE_GPT_CLOCK_DIVIDER_SELECT);
/* Initialize GPT module by default config */
GPT_GetDefaultConfig(&gptConfig);
GPT_Init(hwtimer_dev, &gptConfig);
}
}
/** Initialize the low power ticker
*
*/
void lp_ticker_init(void)
{
gpt_config_t gptConfig;
if (!lp_ticker_inited) {
/* Setup GPT */
GPT_GetDefaultConfig(&gptConfig);
/* Use 32kHz drive */
gptConfig.clockSource = kGPT_ClockSource_LowFreq;
gptConfig.enableFreeRun = true;
gptConfig.enableMode = false;
GPT_Init(GPT2, &gptConfig);
GPT_EnableInterrupts(GPT2, kGPT_OutputCompare1InterruptEnable);
NVIC_ClearPendingIRQ(GPT2_IRQn);
NVIC_SetVector(GPT2_IRQn, (uint32_t)gpt_isr);
EnableIRQ(GPT2_IRQn);
GPT_StartTimer(GPT2);
lp_ticker_inited = true;
} else {
GPT_DisableInterrupts(GPT2, kGPT_OutputCompare1InterruptEnable);
}
}