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- #include "u.h"
- #include "lib.h"
- #include "mem.h"
- #include "dat.h"
- #include "fns.h"
- #include "io.h"
- enum
- {
- /* ctl[0] bits */
- Parity= 1<<0,
- Even= 1<<1,
- Stop2= 1<<2,
- Bits8= 1<<3,
- SCE= 1<<4, /* synchronous clock enable */
- RCE= 1<<5, /* rx on falling edge of clock */
- TCE= 1<<6, /* tx on falling edge of clock */
- /* ctl[3] bits */
- Rena= 1<<0, /* receiver enable */
- Tena= 1<<1, /* transmitter enable */
- Break= 1<<2, /* force TXD3 low */
- Rintena= 1<<3, /* enable receive interrupt */
- Tintena= 1<<4, /* enable transmitter interrupt */
- Loopback= 1<<5, /* loop back data */
- /* data bits */
- DEparity= 1<<8, /* parity error */
- DEframe= 1<<9, /* framing error */
- DEoverrun= 1<<10, /* overrun error */
- /* status[0] bits */
- Tint= 1<<0, /* transmit fifo half full interrupt */
- Rint0= 1<<1, /* receiver fifo 1/3-2/3 full */
- Rint1= 1<<2, /* receiver fifo not empty and receiver idle */
- Breakstart= 1<<3,
- Breakend= 1<<4,
- Fifoerror= 1<<5, /* fifo error */
- /* status[1] bits */
- Tbusy= 1<<0, /* transmitting */
- Rnotempty= 1<<1, /* receive fifo not empty */
- Tnotfull= 1<<2, /* transmit fifo not full */
- ParityError= 1<<3,
- FrameError= 1<<4,
- Overrun= 1<<5,
- };
- Uartregs *uart3regs = (Uartregs*)UART3REGS;
- /*
- * for iprint, just write it
- */
- void
- serialputs(char *str, int n)
- {
- Uartregs *ur;
- ur = uart3regs;
- while(n-- > 0){
- /* wait for output ready */
- while((ur->status[1] & Tnotfull) == 0)
- ;
- ur->data = *str++;
- }
- while((ur->status[1] & Tbusy))
- ;
- }
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