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拉取/合并请求描述:(PR description)
[
为什么提交这份PR (why to submit this PR)
Fixed #11392
修复 issue #11392。HPMicro 串口 V2 驱动的 hpm_uart_putc() 在发送成功后返回传入的 char 值;当发送中文等 UTF-8 数据时,高位字节在 char 为有符号类型的平台上会被解释为负值,进而被串口 V2 的 _serial_poll_tx() 判断为发送失败并提前中断,导致中文输出丢数据。
你的解决方案是什么 (what is your solution)
将 hpm_uart_putc() 的成功返回值由 ch 改为 1,表示已经成功发送 1 个字符,避免把合法的高位字节误判为负错误码。该返回语义也与 STM32 等串口 V2 驱动保持一致。
请提供验证的bsp和config (provide the config and bsp)
BSP: bsp/hpmicro/hpm6750evk
.config: CONFIG_RT_USING_SERIAL_V2=y
action: 本地已执行 git diff --check;当前环境未安装 scons,未进行完整 BSP 编译。
]
当前拉取/合并请求的状态 Intent for your PR
必须选择一项 Choose one (Mandatory):
代码质量 Code Quality:
我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following: