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Last change
on this file since 646 was
444,
checked in by satin@…, 7 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
662 bytes
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| Line | |
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| 1 | #define USE_PORT_A |
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| 2 | |
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| 3 | #define RXADATA (int *) 0x01F800E0 |
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| 4 | #define RXBDATA (int *) 0x01F800E4 |
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| 5 | #define RXSTAT (int *) 0x01F800E8 |
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| 6 | |
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| 7 | void |
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| 8 | outbyte (int c) |
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| 9 | { |
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| 10 | volatile int *rxstat; |
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| 11 | volatile int *rxadata; |
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| 12 | int rxmask; |
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| 13 | |
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| 14 | rxstat = RXSTAT; |
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| 15 | #ifdef USE_PORT_A |
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| 16 | rxadata = RXADATA; |
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| 17 | rxmask = 6; |
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| 18 | #else |
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| 19 | rxadata = RXBDATA; |
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| 20 | rxmask = 0x60000; |
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| 21 | #endif |
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| 22 | |
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| 23 | while ((*rxstat & rxmask) == 0); |
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| 24 | |
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| 25 | *rxadata = c; |
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| 26 | } |
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| 27 | |
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| 28 | int |
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| 29 | inbyte (void) |
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| 30 | { |
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| 31 | volatile int *rxstat; |
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| 32 | volatile int *rxadata; |
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| 33 | int rxmask; |
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| 34 | |
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| 35 | rxstat = RXSTAT; |
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| 36 | #ifdef USE_PORT_A |
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| 37 | rxadata = RXADATA; |
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| 38 | rxmask = 1; |
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| 39 | #else |
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| 40 | rxadata = RXBDATA; |
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| 41 | rxmask = 0x10000; |
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| 42 | #endif |
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| 43 | |
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| 44 | while ((*rxstat & rxmask) == 0); |
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| 45 | |
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| 46 | return *rxadata; |
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| 47 | } |
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