使用指南

编译 PM 示例

该示例包含了多个唤醒源的测试。

RTL8721F

1. 编译，执行命令：

./nuwa.py build -d rtl8721f_evb//mcuboot -a applications/mcuboot_pm_system_manage --sysbuild

2. 固件下载

3. 重新上电，看到如下日志可以看到系统会进入 sleep 并依次被 rtc，counter，gpio 唤醒，其中 gpio 触发唤醒需要将 PB5 连接到 3.3V

   15:21:27.245  Going sleep.
   15:21:27.245  state: 4
   15:21:27.246  [00:00:00.006,000] <inf> soc_pm: call pm_state_set: 4
   15:21:29.130  ?NPPW
   15:21:29.131  APPW
   15:21:29.133  [00:00:00.006,000] <inf> soc_pm: [pm_state_exit_post_ops] AP wake: 4
   15:21:29.134  Wake up by: rtc@4080aa00.
   15:21:29.134  Created the thread.
   15:21:29.135  Going sleep.
   15:21:29.136  state: 4
   15:21:29.312  [00:00:00.006,000] <inf> soc_pm: call pm_state_set: 4
   15:21:29.312  APPG
   15:21:29.312  NPPG
   15:21:30.137  NPPW
   15:21:30.137  APPW
   15:21:30.140  [00:00:00.006,000] <inf> soc_pm: [pm_state_exit_post_ops] AP wake: 4
   15:21:30.141  Wake up by: counter@40819000.
   15:21:30.400  Connect pin gpiob5 with 3.3V to wakeup
   15:21:30.400  Created the thread.
   15:21:30.401  Going sleep.
   15:21:30.401  state: 4
   15:21:30.402  [00:00:00.006,000] <inf> soc_pm: call pm_state_set: 4
   15:21:30.403  APPG
   15:21:38.455  NPPG
   15:22:56.501  NPPW
   15:22:56.502  APPW
   15:22:56.502  [00:00:00.006,000] <inf> soc_pm: [pm_state_exit_post_ops] AP wake: 4
   15:22:56.503  Wake up by: gpio@40811400.
   

配置步骤

1. Kconfig 中打开 PM 以及要使用的唤醒源设备

# Enable PM
CONFIG_PM=y

# Increase stack to avoid crash due to Stack overflow
CONFIG_IDLE_STACK_SIZE=4096

# Enable RTC device as precondition of wakeup-source
CONFIG_RTC=y
CONFIG_RTC_ALARM=y
CONFIG_RTC_AMEBA=y

# Enable timer(counter) device as precondition of wakeup-source
CONFIG_COUNTER=y

# Enable GPIO device as precondition of wakeup-source
CONFIG_GPIO=y

2. 在 dts（overlay） 中为唤醒源设备添加 wakeup-source 属性使能其唤醒源功能，例如：

&rtc {
   status = "okay";
   wakeup-source;
};

&gpiob {
   status = "okay";
   wakeup-source;
};

&timer0 {
   status = "okay";
   wakeup-source;
};

3. 在代码中为 device 进行初始化