hserout could never be affected by interrupts in any normal sort of asynchronous use
hserin will not be affected by interrupts in any normal sort of asynchronous use provided the isr does not take so long as to cause a buffer overrun
hserout could never be affected by interrupts in any normal sort of asynchronous use
hserin will not be affected by interrupts in any normal sort of asynchronous use provided the isr does not take so long as to cause a buffer overrun
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