Mo El-Sharkawy / Mbed 2 deprecated 00_mcr20_wireless_uart

wireless_uart

Dependencies:   fsl_phy_mcr20a fsl_smac mbed-rtos mbed

Fork of mcr20_wireless_uart by samuel belete

circular_buffer.cpp@27:1eb29717bfd9, 2015-06-29 (annotated)

Committer:
andreikovacs
Date:
Mon Jun 29 05:50:47 2015 +0000
Revision:
27:1eb29717bfd9
Changed app to behave like the initial Wireless UART demo

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andreikovacs 27:1eb29717bfd9 1 #include "circular_buffer.h"
andreikovacs 27:1eb29717bfd9 2
andreikovacs 27:1eb29717bfd9 3 CircularBuffer::CircularBuffer()
andreikovacs 27:1eb29717bfd9 4 {
andreikovacs 27:1eb29717bfd9 5 size = gCircularBufferSize_c;
andreikovacs 27:1eb29717bfd9 6 readIndex = 0;
andreikovacs 27:1eb29717bfd9 7 writeIndex = 0;
andreikovacs 27:1eb29717bfd9 8 count = 0;
andreikovacs 27:1eb29717bfd9 9 MEM_Init();
andreikovacs 27:1eb29717bfd9 10 buffer = (uint8_t *) MEM_BufferAlloc(size * sizeof(uint8_t));
andreikovacs 27:1eb29717bfd9 11 if ( NULL == buffer )
andreikovacs 27:1eb29717bfd9 12 {
andreikovacs 27:1eb29717bfd9 13 /*if buffer alloc fails stop the program execution*/
andreikovacs 27:1eb29717bfd9 14 while(1);
andreikovacs 27:1eb29717bfd9 15 }
andreikovacs 27:1eb29717bfd9 16 }
andreikovacs 27:1eb29717bfd9 17
andreikovacs 27:1eb29717bfd9 18 CircularBuffer::CircularBuffer(uint32_t sz)
andreikovacs 27:1eb29717bfd9 19 {
andreikovacs 27:1eb29717bfd9 20 size = sz;
andreikovacs 27:1eb29717bfd9 21 readIndex = 0;
andreikovacs 27:1eb29717bfd9 22 writeIndex = 0;
andreikovacs 27:1eb29717bfd9 23 count = 0;
andreikovacs 27:1eb29717bfd9 24 MEM_Init();
andreikovacs 27:1eb29717bfd9 25 buffer = (uint8_t *) MEM_BufferAlloc(size * sizeof(uint8_t));
andreikovacs 27:1eb29717bfd9 26 if ( NULL == buffer )
andreikovacs 27:1eb29717bfd9 27 {
andreikovacs 27:1eb29717bfd9 28 /*if buffer alloc fails stop the program execution*/
andreikovacs 27:1eb29717bfd9 29 while(1);
andreikovacs 27:1eb29717bfd9 30 }
andreikovacs 27:1eb29717bfd9 31 }
andreikovacs 27:1eb29717bfd9 32
andreikovacs 27:1eb29717bfd9 33 CircularBuffer::~CircularBuffer()
andreikovacs 27:1eb29717bfd9 34 {
andreikovacs 27:1eb29717bfd9 35 size = 0;
andreikovacs 27:1eb29717bfd9 36 readIndex = 0;
andreikovacs 27:1eb29717bfd9 37 writeIndex = 0;
andreikovacs 27:1eb29717bfd9 38 count = 0;
andreikovacs 27:1eb29717bfd9 39 MEM_BufferFree(buffer);
andreikovacs 27:1eb29717bfd9 40 }
andreikovacs 27:1eb29717bfd9 41
andreikovacs 27:1eb29717bfd9 42 bufferStatus_t CircularBuffer :: addToBuffer (uint8_t c)
andreikovacs 27:1eb29717bfd9 43 {
andreikovacs 27:1eb29717bfd9 44 buffer[writeIndex] = c;
andreikovacs 27:1eb29717bfd9 45 writeIndex++;
andreikovacs 27:1eb29717bfd9 46 if (writeIndex >= size)
andreikovacs 27:1eb29717bfd9 47 {
andreikovacs 27:1eb29717bfd9 48 writeIndex = 0;
andreikovacs 27:1eb29717bfd9 49 }
andreikovacs 27:1eb29717bfd9 50 count++;
andreikovacs 27:1eb29717bfd9 51 if (count >= size)
andreikovacs 27:1eb29717bfd9 52 {
andreikovacs 27:1eb29717bfd9 53 return buffer_Full_c;
andreikovacs 27:1eb29717bfd9 54 }
andreikovacs 27:1eb29717bfd9 55 return buffer_Ok_c;
andreikovacs 27:1eb29717bfd9 56 }
andreikovacs 27:1eb29717bfd9 57
andreikovacs 27:1eb29717bfd9 58 bufferStatus_t CircularBuffer :: getFromBuffer (uint8_t *c)
andreikovacs 27:1eb29717bfd9 59 {
andreikovacs 27:1eb29717bfd9 60 if ( 0 == count )
andreikovacs 27:1eb29717bfd9 61 {
andreikovacs 27:1eb29717bfd9 62 return buffer_Empty_c;
andreikovacs 27:1eb29717bfd9 63 }
andreikovacs 27:1eb29717bfd9 64 (*c) = buffer[readIndex];
andreikovacs 27:1eb29717bfd9 65 readIndex++;
andreikovacs 27:1eb29717bfd9 66 if (readIndex >= size)
andreikovacs 27:1eb29717bfd9 67 {
andreikovacs 27:1eb29717bfd9 68 readIndex = 0;
andreikovacs 27:1eb29717bfd9 69 }
andreikovacs 27:1eb29717bfd9 70 count--;
andreikovacs 27:1eb29717bfd9 71 return buffer_Ok_c;
andreikovacs 27:1eb29717bfd9 72 }
andreikovacs 27:1eb29717bfd9 73
andreikovacs 27:1eb29717bfd9 74 uint32_t CircularBuffer :: getCount()
andreikovacs 27:1eb29717bfd9 75 {
andreikovacs 27:1eb29717bfd9 76 return count;
andreikovacs 27:1eb29717bfd9 77 }