Mark Vandermeulen / FYDP_Final

Code for our FYDP -only one IMU works right now -RTOS is working

Dependencies:   mbed

mbed/MODSERIAL/RESIZE.cpp@0:964eb6a2ef00, 2015-03-18 (annotated)

Committer:
majik
Date:
Wed Mar 18 22:23:48 2015 +0000
Revision:
0:964eb6a2ef00
This is our FYDP code, but only one IMU works with the RTOS.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
majik 0:964eb6a2ef00 1 /*
majik 0:964eb6a2ef00 2 Copyright (c) 2010 Andy Kirkham
majik 0:964eb6a2ef00 3
majik 0:964eb6a2ef00 4 Permission is hereby granted, free of charge, to any person obtaining a copy
majik 0:964eb6a2ef00 5 of this software and associated documentation files (the "Software"), to deal
majik 0:964eb6a2ef00 6 in the Software without restriction, including without limitation the rights
majik 0:964eb6a2ef00 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
majik 0:964eb6a2ef00 8 copies of the Software, and to permit persons to whom the Software is
majik 0:964eb6a2ef00 9 furnished to do so, subject to the following conditions:
majik 0:964eb6a2ef00 10
majik 0:964eb6a2ef00 11 The above copyright notice and this permission notice shall be included in
majik 0:964eb6a2ef00 12 all copies or substantial portions of the Software.
majik 0:964eb6a2ef00 13
majik 0:964eb6a2ef00 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
majik 0:964eb6a2ef00 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
majik 0:964eb6a2ef00 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
majik 0:964eb6a2ef00 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
majik 0:964eb6a2ef00 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
majik 0:964eb6a2ef00 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
majik 0:964eb6a2ef00 20 THE SOFTWARE.
majik 0:964eb6a2ef00 21 */
majik 0:964eb6a2ef00 22
majik 0:964eb6a2ef00 23 #include "MODSERIAL.h"
majik 0:964eb6a2ef00 24 #include "MACROS.h"
majik 0:964eb6a2ef00 25
majik 0:964eb6a2ef00 26 namespace AjK {
majik 0:964eb6a2ef00 27
majik 0:964eb6a2ef00 28 int
majik 0:964eb6a2ef00 29 MODSERIAL::resizeBuffer(int size, IrqType type, bool memory_check)
majik 0:964eb6a2ef00 30 {
majik 0:964eb6a2ef00 31 int rval = Ok;
majik 0:964eb6a2ef00 32
majik 0:964eb6a2ef00 33 // If the requested size is the same as the current size there's nothing to do,
majik 0:964eb6a2ef00 34 // just continue to use the same buffer as it's fine as it is.
majik 0:964eb6a2ef00 35 if (buffer_size[type] == size) return rval;
majik 0:964eb6a2ef00 36
majik 0:964eb6a2ef00 37 // Make sure the ISR cannot use the buffers while we are manipulating them.
majik 0:964eb6a2ef00 38 NVIC_DisableIRQ(_IRQ);
majik 0:964eb6a2ef00 39
majik 0:964eb6a2ef00 40 // If the requested buffer size is larger than the current size,
majik 0:964eb6a2ef00 41 // attempt to create a new buffer and use it.
majik 0:964eb6a2ef00 42 if (buffer_size[type] < size) {
majik 0:964eb6a2ef00 43 rval = upSizeBuffer(size, type, memory_check);
majik 0:964eb6a2ef00 44 }
majik 0:964eb6a2ef00 45 else if (buffer_size[type] > size) {
majik 0:964eb6a2ef00 46 rval = downSizeBuffer(size, type, memory_check);
majik 0:964eb6a2ef00 47 }
majik 0:964eb6a2ef00 48
majik 0:964eb6a2ef00 49 // Start the ISR system again with the new buffers.
majik 0:964eb6a2ef00 50 NVIC_EnableIRQ(_IRQ);
majik 0:964eb6a2ef00 51
majik 0:964eb6a2ef00 52 return rval;
majik 0:964eb6a2ef00 53 }
majik 0:964eb6a2ef00 54
majik 0:964eb6a2ef00 55 int
majik 0:964eb6a2ef00 56 MODSERIAL::downSizeBuffer(int size, IrqType type, bool memory_check)
majik 0:964eb6a2ef00 57 {
majik 0:964eb6a2ef00 58 if (size >= buffer_count[type]) {
majik 0:964eb6a2ef00 59 return BufferOversize;
majik 0:964eb6a2ef00 60 }
majik 0:964eb6a2ef00 61
majik 0:964eb6a2ef00 62 char *s = (char *)malloc(size);
majik 0:964eb6a2ef00 63
majik 0:964eb6a2ef00 64 if (s == (char *)NULL) {
majik 0:964eb6a2ef00 65 if (memory_check) {
majik 0:964eb6a2ef00 66 error("Failed to allocate memory for %s buffer", type == TxIrq ? "TX" : "RX");
majik 0:964eb6a2ef00 67 }
majik 0:964eb6a2ef00 68 return NoMemory;
majik 0:964eb6a2ef00 69 }
majik 0:964eb6a2ef00 70
majik 0:964eb6a2ef00 71 int c, new_in = 0;
majik 0:964eb6a2ef00 72
majik 0:964eb6a2ef00 73 do {
majik 0:964eb6a2ef00 74 c = __getc(false);
majik 0:964eb6a2ef00 75 if (c != -1) s[new_in++] = (char)c;
majik 0:964eb6a2ef00 76 if (new_in >= size) new_in = 0;
majik 0:964eb6a2ef00 77 }
majik 0:964eb6a2ef00 78 while (c != -1);
majik 0:964eb6a2ef00 79
majik 0:964eb6a2ef00 80 free((char *)buffer[type]);
majik 0:964eb6a2ef00 81 buffer[type] = s;
majik 0:964eb6a2ef00 82 buffer_in[type] = new_in;
majik 0:964eb6a2ef00 83 buffer_out[type] = 0;
majik 0:964eb6a2ef00 84 return Ok;
majik 0:964eb6a2ef00 85 }
majik 0:964eb6a2ef00 86
majik 0:964eb6a2ef00 87 int
majik 0:964eb6a2ef00 88 MODSERIAL::upSizeBuffer(int size, IrqType type, bool memory_check)
majik 0:964eb6a2ef00 89 {
majik 0:964eb6a2ef00 90 char *s = (char *)malloc(size);
majik 0:964eb6a2ef00 91
majik 0:964eb6a2ef00 92 if (s == (char *)NULL) {
majik 0:964eb6a2ef00 93 if (memory_check) {
majik 0:964eb6a2ef00 94 error("Failed to allocate memory for %s buffer", type == TxIrq ? "TX" : "RX");
majik 0:964eb6a2ef00 95 }
majik 0:964eb6a2ef00 96 return NoMemory;
majik 0:964eb6a2ef00 97 }
majik 0:964eb6a2ef00 98
majik 0:964eb6a2ef00 99 if (buffer_count[type] == 0) { // Current buffer empty?
majik 0:964eb6a2ef00 100 free((char *)buffer[type]);
majik 0:964eb6a2ef00 101 buffer[type] = s;
majik 0:964eb6a2ef00 102 buffer_in[type] = 0;
majik 0:964eb6a2ef00 103 buffer_out[type] = 0;
majik 0:964eb6a2ef00 104 }
majik 0:964eb6a2ef00 105 else { // Copy the current contents into the new buffer.
majik 0:964eb6a2ef00 106 int c, new_in = 0;
majik 0:964eb6a2ef00 107 do {
majik 0:964eb6a2ef00 108 c = __getc(false);
majik 0:964eb6a2ef00 109 if (c != -1) s[new_in++] = (char)c;
majik 0:964eb6a2ef00 110 if (new_in >= size) new_in = 0; // Shouldn't happen, but be sure.
majik 0:964eb6a2ef00 111 }
majik 0:964eb6a2ef00 112 while (c != -1);
majik 0:964eb6a2ef00 113 free((char *)buffer[type]);
majik 0:964eb6a2ef00 114 buffer[type] = s;
majik 0:964eb6a2ef00 115 buffer_in[type] = new_in;
majik 0:964eb6a2ef00 116 buffer_out[type] = 0;
majik 0:964eb6a2ef00 117 }
majik 0:964eb6a2ef00 118
majik 0:964eb6a2ef00 119 buffer_size[type] = size;
majik 0:964eb6a2ef00 120 return Ok;
majik 0:964eb6a2ef00 121 }
majik 0:964eb6a2ef00 122
majik 0:964eb6a2ef00 123 }; // namespace AjK ends