CloudEdge/bl_mcu_sdk
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bl_mcu_sdk/examples/pwm/pwm_breath_led/readme.md

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board/bl706_iot/pinmux_config.h 中 CONFIG_GPIO22_FUNC 选择 GPIO_FUN_PWM

board/bl706_iot/clock_config.h 中

  • BSP_PWM_CLOCK_SOURCE 选择 ROOT_CLOCK_SOURCE_32K_CLK,
  • BSP_PWM_CLOCK_DIV 设置成 32

$ make APP=pwm_breath_led BOARD=bl706_iot