About the low power wake up of RT1170

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About the low power wake up of RT1170

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emmmmmmmmmmmmmm
Contributor III

I am carrying out the low power wake-up test of RT1170, and the SDK default is GPIO wake-up, I tried to go to wake up, but when configuring GPT as a wake-up source, I found that CPUs were not possible when CPU STOP. When the CPU WAIT is, GPT can wake up correctly, how is this?

My configuration code:

void GPT1_IRQHandler()
{
GPT_ClearStatusFlags(GPT1, kGPT_OutputCompare1Flag);
GPT_DisableInterrupts(GPT1,kGPT_OutputCompare1InterruptEnable);
GPC_DisableWakeupSource(GPT1_IRQn);
PRINTF("GPT1_IRQHandler\n");
DisableIRQ(GPT1_IRQn);
GPT_StopTimer(GPT1);
#ifdef CORE1_GET_INPUT_FROM_CORE0
MU_TriggerInterrupts(MU_BASE, kMU_GenInt0InterruptTrigger);
#endif
}
void SetGPTWakeupConfig()
{
gpt_config_t gptConfig;
GPT_GetDefaultConfig(&gptConfig);
GPT_Init(GPT1, &gptConfig);
GPT_SetClockDivider(GPT1, 3);
GPT_SetOutputCompareValue(GPT1, kGPT_OutputCompare_Channel1, CLOCK_GetFreq(kCLOCK_OscRc48MDiv2)/(3 * 1));
GPT_EnableInterrupts(GPT1, kGPT_OutputCompare1InterruptEnable);
EnableIRQ(GPT1_IRQn);
GPC_DisableAllWakeupSource(GPC_CPU_MODE_CTRL);
/* Enable GPC interrupt */
GPC_EnableWakeupSource(GPT1_IRQn);
GPT_StartTimer(GPT1);
}

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1 Solution
136 Views
emmmmmmmmmmmmmm
Contributor III

I found the reason that the MCU closes the peripheral clock when entering the STOP mode. GPT uses the KCLOCK_OSCRC48MDIV2 clock by default, you need to set the GPT clock source to the low speed clock of the internal 32K

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3 Replies
137 Views
emmmmmmmmmmmmmm
Contributor III

I found the reason that the MCU closes the peripheral clock when entering the STOP mode. GPT uses the KCLOCK_OSCRC48MDIV2 clock by default, you need to set the GPT clock source to the low speed clock of the internal 32K

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151 Views
jeremyzhou
NXP TechSupport
NXP TechSupport

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
I was wondering if you can illustrate the test steps, for instance, the demo project, board, etc.
Looking forward to your reply.
Have a great day,
TIC

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143 Views
emmmmmmmmmmmmmm
Contributor III

Thank you for your reply

1、Example of use is \ sdk_2.9.1_mimxrt1170-evk \ Boards \ evkmimxrt1170 \ demo_apps \ power_mode_switch_test\bm\core0
2、The board is RT1176DVMAA
3、In the original example, the app_setwakeupconfig () function is replaced with setgptwakeupconfig (), enabled macro SINGLE_CORE_M7

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