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虚拟串口波特率超过921600后不准确 #8

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rhyttr opened this issue Jun 2, 2022 · 1 comment
Open

虚拟串口波特率超过921600后不准确 #8

rhyttr opened this issue Jun 2, 2022 · 1 comment

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@rhyttr
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rhyttr commented Jun 2, 2022

STLINK-V3 测试虚拟串口可以到16Mb稳定.
测试了 DAP link 虚拟串口
当配置 波特率小于 921600 时没问题
当配置 波特率大于 921600 时不准确:
配置波特率为 2304000(2.3Mb) 时位时间应当为 434 ns, 但实际测试位时间为 320 ns
配置波特率为 4608000(4.6Mb) 时位时间应当为 217 ns, 但实际测试位时间为 160 ns

高速波特率时看了波形边沿还可以, 只是目前的固件位宽不正确, 能不能修正一下
@MasterQ233
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921600也无法正常通信

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@rhyttr @MasterQ233