Re: [問題] ARM板 RS232互傳問題請教~
※ 引述《a910937 (skura)》之銘言：
: → a910937:您好,請問while迴圈怎麼樣判斷呢?? 12/11 15:02
: → a910937:我想用arm uart內部特殊暫存器做判斷是否已滿 可行嗎^^? 12/11 15:03
^^^^^^^^^^^^^^
讓我來亂入一下。
UARTn Interrupt Identification Register
(U0IIR - 0xE000 C008, U2IIR - 0xE007 8008, U3IIR - 0x7008 C008, Read Only)
Interrupt identification. UnIER[3:1] identifies an interrupt
corresponding to the UARTn Rx FIFO. All other combinations of
UnIER[3:1] not listed above are reserved (000,100,101,111).
011 1 - Receive Line Status (RLS).
010 2a - Receive Data Available (RDA). -> 收到(一定量)的東西
110 2b - Character Time-out Indicator (CTI).
001 3 - THRE Interrupt -> 沒有東西可以送了
你是在Linux kernel裡面作編程嗎？
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