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Gabriel Wang 2023-06-12 08:37:42 +01:00
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@ -216,9 +216,9 @@ Please set the macro `EVENT_TIMESTAMP_SOURCE` to `3` to suppress it.
#### 1.5.1 System Frequency Changing #### 1.5.1 System Frequency Changing
If you want to change the System Frequency, **after** the changing, make sure: If you want to change the System Frequency, **after** the change, make sure:
1. The `SystemCoreClock` has been updated with the new system frequency. Usually the HAL will update the `SystemCoreClock` automatically, but in some rare case where `SystemCoreClock` is updated accordingly, you should do it yourself. 1. The `SystemCoreClock` has been updated with the new system frequency. Usually, the HAL will update the `SystemCoreClock` automatically, but in some rare cases where `SystemCoreClock` is updated accordingly, you should do it yourself.
2. please call `update_perf_counter()` to notify perf_counter. 2. please call `update_perf_counter()` to notify perf_counter.