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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 56 | mjames | 1 | /*---------------------------------------------------------------------------- |
| 2 | * Name: Retarget.c |
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| 3 | * Purpose: 'Retarget' layer for target-dependent low level functions |
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| 4 | * Note(s): |
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| 5 | *---------------------------------------------------------------------------- |
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| 6 | * This file is part of the uVision/ARM development tools. |
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| 7 | * This software may only be used under the terms of a valid, current, |
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| 8 | * end user licence from KEIL for a compatible version of KEIL software |
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| 9 | * development tools. Nothing else gives you the right to use this software. |
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| 10 | * |
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| 11 | * This software is supplied "AS IS" without warranties of any kind. |
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| 12 | * |
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| 13 | * Copyright (c) 2012 Keil - An ARM Company. All rights reserved. |
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| 14 | *----------------------------------------------------------------------------*/ |
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| 15 | |||
| 16 | #include <sys/stat.h> |
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| 17 | #include <string.h> |
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| 18 | #include <errno.h> |
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| 19 | |||
| 20 | int SER_PutChar (int c) { |
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| 21 | |||
| 22 | return (c); |
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| 23 | } |
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| 24 | |||
| 25 | int SER_GetChar (void) { |
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| 26 | |||
| 27 | return (-1); |
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| 28 | } |
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| 29 | |||
| 30 | /*-- GCC - Newlib runtime support --------------------------------------------*/ |
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| 31 | |||
| 32 | extern int __HeapBase; |
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| 33 | extern int __HeapLimit; |
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| 34 | |||
| 35 | int _open (const char * path, int flags, ...) |
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| 36 | { |
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| 37 | return (-1); |
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| 38 | } |
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| 39 | |||
| 40 | int _close (int fd) |
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| 41 | { |
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| 42 | return (-1); |
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| 43 | } |
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| 44 | |||
| 45 | int _lseek (int fd, int ptr, int dir) |
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| 46 | { |
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| 47 | return (0); |
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| 48 | } |
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| 49 | |||
| 50 | int __attribute__((weak)) _fstat (int fd, struct stat * st) |
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| 51 | { |
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| 52 | memset (st, 0, sizeof (* st)); |
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| 53 | st->st_mode = S_IFCHR; |
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| 54 | return (0); |
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| 55 | } |
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| 56 | |||
| 57 | int _isatty (int fd) |
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| 58 | { |
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| 59 | return (1); |
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| 60 | } |
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| 61 | |||
| 62 | int _read (int fd, char * ptr, int len) |
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| 63 | { |
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| 64 | char c; |
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| 65 | int i; |
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| 66 | |||
| 67 | for (i = 0; i < len; i++) |
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| 68 | { |
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| 69 | c = SER_GetChar(); |
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| 70 | if (c == 0x0D) break; |
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| 71 | *ptr++ = c; |
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| 72 | SER_PutChar(c); |
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| 73 | } |
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| 74 | return (len - i); |
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| 75 | } |
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| 76 | |||
| 77 | int _write (int fd, char * ptr, int len) |
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| 78 | { |
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| 79 | int i; |
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| 80 | |||
| 81 | for (i = 0; i < len; i++) SER_PutChar (*ptr++); |
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| 82 | return (i); |
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| 83 | } |
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| 84 | |||
| 85 | caddr_t _sbrk (int incr) |
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| 86 | { |
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| 87 | static char * heap; |
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| 88 | char * prev_heap; |
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| 89 | |||
| 90 | if (heap == NULL) |
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| 91 | { |
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| 92 | heap = (char *)&__HeapBase; |
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| 93 | } |
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| 94 | |||
| 95 | prev_heap = heap; |
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| 96 | |||
| 97 | if ((heap + incr) > (char *)&__HeapLimit) |
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| 98 | { |
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| 99 | errno = ENOMEM; |
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| 100 | return (caddr_t) -1; |
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| 101 | } |
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| 102 | |||
| 103 | heap += incr; |
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| 104 | |||
| 105 | return (caddr_t) prev_heap; |
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| 106 | } |