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ttyS3輸出僅前16字元 #80

@kenlee0823

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@kenlee0823

芯片 NUC972DF71Y 腳位規劃如下:

	TX	RX
ttyS0	PE.0	PE.1		
ttyS1	PH.4	PH.5
ttyS2	PF.11	PF.12
ttyS3	PE.12	PE.13
ttyS4	PH.8	PH.9

由 ttyS0 下指令 (?: 1..4)
echo "0123456789ABCDEFGHIJK" > /dev/ttyS?

S1、S2、S4 皆正常,但 S3 輸出卻僅有前 16 字元,如:
0123456789ABCDEF

腳位規劃未變,但以 2022-11-11 時編譯之 kernel 測試則無此狀況。

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