DIYmall 0.96" Inch I2c IIC Serial 128x64 Oled LCD LED White Display Module
Dependencies: Adafruit_GFX SDFileSystem
Fork of ATT_AWS_IoT_demo by
WNCInterface/WncControllerK64F/MODSERIAL/RESIZE.cpp@28:4650c541b029, 2018-10-09 (annotated)
- Committer:
- afmiee
- Date:
- Tue Oct 09 20:57:34 2018 +0000
- Revision:
- 28:4650c541b029
- Parent:
- 15:6f2798e45099
DIYmall 0.96" Inch I2c IIC Serial 128x64 Oled LCD LED White Display Module
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
ampembeng | 15:6f2798e45099 | 1 | /* |
ampembeng | 15:6f2798e45099 | 2 | Copyright (c) 2010 Andy Kirkham |
ampembeng | 15:6f2798e45099 | 3 | |
ampembeng | 15:6f2798e45099 | 4 | Permission is hereby granted, free of charge, to any person obtaining a copy |
ampembeng | 15:6f2798e45099 | 5 | of this software and associated documentation files (the "Software"), to deal |
ampembeng | 15:6f2798e45099 | 6 | in the Software without restriction, including without limitation the rights |
ampembeng | 15:6f2798e45099 | 7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
ampembeng | 15:6f2798e45099 | 8 | copies of the Software, and to permit persons to whom the Software is |
ampembeng | 15:6f2798e45099 | 9 | furnished to do so, subject to the following conditions: |
ampembeng | 15:6f2798e45099 | 10 | |
ampembeng | 15:6f2798e45099 | 11 | The above copyright notice and this permission notice shall be included in |
ampembeng | 15:6f2798e45099 | 12 | all copies or substantial portions of the Software. |
ampembeng | 15:6f2798e45099 | 13 | |
ampembeng | 15:6f2798e45099 | 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
ampembeng | 15:6f2798e45099 | 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
ampembeng | 15:6f2798e45099 | 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
ampembeng | 15:6f2798e45099 | 17 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
ampembeng | 15:6f2798e45099 | 18 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
ampembeng | 15:6f2798e45099 | 19 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
ampembeng | 15:6f2798e45099 | 20 | THE SOFTWARE. |
ampembeng | 15:6f2798e45099 | 21 | */ |
ampembeng | 15:6f2798e45099 | 22 | |
ampembeng | 15:6f2798e45099 | 23 | #include "MODSERIAL.h" |
ampembeng | 15:6f2798e45099 | 24 | #include "MACROS.h" |
ampembeng | 15:6f2798e45099 | 25 | |
ampembeng | 15:6f2798e45099 | 26 | namespace AjK { |
ampembeng | 15:6f2798e45099 | 27 | |
ampembeng | 15:6f2798e45099 | 28 | int |
ampembeng | 15:6f2798e45099 | 29 | MODSERIAL::resizeBuffer(int size, IrqType type, bool memory_check) |
ampembeng | 15:6f2798e45099 | 30 | { |
ampembeng | 15:6f2798e45099 | 31 | // Make sure the ISR cannot use the buffers while we are manipulating them. |
ampembeng | 15:6f2798e45099 | 32 | NVIC_DisableIRQ(_IRQ); |
ampembeng | 15:6f2798e45099 | 33 | |
ampembeng | 15:6f2798e45099 | 34 | // If the requested size is the same as the current size there's nothing to do, |
ampembeng | 15:6f2798e45099 | 35 | // just continue to use the same buffer as it's fine as it is. |
ampembeng | 15:6f2798e45099 | 36 | if (buffer_size[type] == size) |
ampembeng | 15:6f2798e45099 | 37 | { |
ampembeng | 15:6f2798e45099 | 38 | NVIC_EnableIRQ(_IRQ); |
ampembeng | 15:6f2798e45099 | 39 | return Ok; |
ampembeng | 15:6f2798e45099 | 40 | } |
ampembeng | 15:6f2798e45099 | 41 | |
ampembeng | 15:6f2798e45099 | 42 | // is new buffer is big enough? |
ampembeng | 15:6f2798e45099 | 43 | if (size <= buffer_count[type]) |
ampembeng | 15:6f2798e45099 | 44 | { |
ampembeng | 15:6f2798e45099 | 45 | NVIC_EnableIRQ(_IRQ); |
ampembeng | 15:6f2798e45099 | 46 | return BufferOversize; |
ampembeng | 15:6f2798e45099 | 47 | } |
ampembeng | 15:6f2798e45099 | 48 | |
ampembeng | 15:6f2798e45099 | 49 | // allocate new buffer |
ampembeng | 15:6f2798e45099 | 50 | char * newBuffer = (char*)malloc(size); |
ampembeng | 15:6f2798e45099 | 51 | |
ampembeng | 15:6f2798e45099 | 52 | // allocation failed? |
ampembeng | 15:6f2798e45099 | 53 | if (newBuffer == (char*)NULL) |
ampembeng | 15:6f2798e45099 | 54 | { |
ampembeng | 15:6f2798e45099 | 55 | if (memory_check) |
ampembeng | 15:6f2798e45099 | 56 | error("Failed to allocate memory for %s buffer", type == TxIrq ? "TX" : "RX"); |
ampembeng | 15:6f2798e45099 | 57 | |
ampembeng | 15:6f2798e45099 | 58 | return NoMemory; |
ampembeng | 15:6f2798e45099 | 59 | } |
ampembeng | 15:6f2798e45099 | 60 | |
ampembeng | 15:6f2798e45099 | 61 | // copy old buffer content to new one |
ampembeng | 15:6f2798e45099 | 62 | moveRingBuffer(newBuffer, type); |
ampembeng | 15:6f2798e45099 | 63 | |
ampembeng | 15:6f2798e45099 | 64 | // free old buffer and reset ring buffer cursor |
ampembeng | 15:6f2798e45099 | 65 | free((char*)buffer[type]); |
ampembeng | 15:6f2798e45099 | 66 | |
ampembeng | 15:6f2798e45099 | 67 | buffer[type] = newBuffer; |
ampembeng | 15:6f2798e45099 | 68 | buffer_size[type] = size; |
ampembeng | 15:6f2798e45099 | 69 | buffer_in[type] = buffer_count[type]; |
ampembeng | 15:6f2798e45099 | 70 | buffer_out[type] = 0; |
ampembeng | 15:6f2798e45099 | 71 | |
ampembeng | 15:6f2798e45099 | 72 | // Start the ISR system again with the new buffers. |
ampembeng | 15:6f2798e45099 | 73 | NVIC_EnableIRQ(_IRQ); |
ampembeng | 15:6f2798e45099 | 74 | return Ok; |
ampembeng | 15:6f2798e45099 | 75 | } |
ampembeng | 15:6f2798e45099 | 76 | |
ampembeng | 15:6f2798e45099 | 77 | void MODSERIAL::moveRingBuffer(char * newBuffer, IrqType type) |
ampembeng | 15:6f2798e45099 | 78 | { |
ampembeng | 15:6f2798e45099 | 79 | // copy old buffer content to new one |
ampembeng | 15:6f2798e45099 | 80 | if(buffer_in[type] > buffer_out[type]) |
ampembeng | 15:6f2798e45099 | 81 | { // content in the middle of the ring buffer |
ampembeng | 15:6f2798e45099 | 82 | memcpy(&newBuffer[0], (char*)&buffer[type][buffer_out[type]], buffer_count[type]); |
ampembeng | 15:6f2798e45099 | 83 | } |
ampembeng | 15:6f2798e45099 | 84 | else if(buffer_in[type] < buffer_out[type]) |
ampembeng | 15:6f2798e45099 | 85 | { // content split, free space in the middle |
ampembeng | 15:6f2798e45099 | 86 | // copy last part of the old buffer |
ampembeng | 15:6f2798e45099 | 87 | int end_count= buffer_size[type] - buffer_out[type]; |
ampembeng | 15:6f2798e45099 | 88 | memcpy(&newBuffer[0], (char*)&buffer[type][buffer_out[type]], end_count); |
ampembeng | 15:6f2798e45099 | 89 | |
ampembeng | 15:6f2798e45099 | 90 | // copy first part of old buffer |
ampembeng | 15:6f2798e45099 | 91 | memcpy(&newBuffer[end_count], (char*)buffer[type], buffer_in[type]); |
ampembeng | 15:6f2798e45099 | 92 | } |
ampembeng | 15:6f2798e45099 | 93 | // else old buffer empty |
ampembeng | 15:6f2798e45099 | 94 | } |
ampembeng | 15:6f2798e45099 | 95 | |
ampembeng | 15:6f2798e45099 | 96 | }; // namespace AjK ends |
ampembeng | 15:6f2798e45099 | 97 |