Sean McBeath / C027_Support

C027 support

Fork of C027_Support by u-blox

SerialPipe.cpp@75:ce6e12067d0c, 2014-05-16 (annotated)

Committer:
mazgch
Date:
Fri May 16 14:13:00 2014 +0000
Revision:
75:ce6e12067d0c
Parent:
74:208e3e32d263
Child:
95:8282dbbe1492
minor tweaks

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mazgch 9:e7a5959ffae1 1 #pragma once
mazgch 9:e7a5959ffae1 2
mazgch 9:e7a5959ffae1 3 #include "SerialPipe.h"
mazgch 9:e7a5959ffae1 4
mazgch 74:208e3e32d263 5 SerialPipe::SerialPipe(PinName tx, PinName rx, int rxSize, int txSize) :
mazgch 74:208e3e32d263 6 _SerialPipeBase(tx,rx),
mazgch 74:208e3e32d263 7 _pipeRx( (rx!=NC) ? rxSize : 0),
mazgch 74:208e3e32d263 8 _pipeTx( (tx!=NC) ? txSize : 0)
mazgch 9:e7a5959ffae1 9 {
mazgch 74:208e3e32d263 10 if (rx!=NC)
mazgch 74:208e3e32d263 11 attach(this, &SerialPipe::rxIrqBuf, RxIrq);
mazgch 9:e7a5959ffae1 12 }
mazgch 9:e7a5959ffae1 13
mazgch 9:e7a5959ffae1 14 SerialPipe::~SerialPipe(void)
mazgch 9:e7a5959ffae1 15 {
mazgch 9:e7a5959ffae1 16 attach(NULL, RxIrq);
mazgch 9:e7a5959ffae1 17 attach(NULL, TxIrq);
mazgch 9:e7a5959ffae1 18 }
mazgch 9:e7a5959ffae1 19
mazgch 9:e7a5959ffae1 20 // tx channel
mazgch 13:e2446fcdc246 21 int SerialPipe::writeable(void)
mazgch 13:e2446fcdc246 22 {
mazgch 13:e2446fcdc246 23 return _pipeTx.free();
mazgch 13:e2446fcdc246 24 }
mazgch 13:e2446fcdc246 25
mazgch 13:e2446fcdc246 26 int SerialPipe::putc(int c)
mazgch 13:e2446fcdc246 27 {
mazgch 15:5eda64e5b9d1 28 c = _pipeTx.putc(c);
mazgch 15:5eda64e5b9d1 29 txStart();
mazgch 15:5eda64e5b9d1 30 return c;
mazgch 13:e2446fcdc246 31 }
mazgch 13:e2446fcdc246 32
mazgch 13:e2446fcdc246 33 int SerialPipe::put(const void* buffer, int length, bool blocking)
mazgch 9:e7a5959ffae1 34 {
mazgch 13:e2446fcdc246 35 int count = length;
mazgch 13:e2446fcdc246 36 const char* ptr = (const char*)buffer;
mazgch 15:5eda64e5b9d1 37 if (count)
mazgch 9:e7a5959ffae1 38 {
mazgch 15:5eda64e5b9d1 39 do
mazgch 15:5eda64e5b9d1 40 {
mazgch 15:5eda64e5b9d1 41 int written = _pipeTx.put(ptr, count, false);
mazgch 75:ce6e12067d0c 42 if (written) {
mazgch 75:ce6e12067d0c 43 ptr += written;
mazgch 75:ce6e12067d0c 44 count -= written;
mazgch 75:ce6e12067d0c 45 txStart();
mazgch 75:ce6e12067d0c 46 }
mazgch 75:ce6e12067d0c 47 else if (!blocking)
mazgch 75:ce6e12067d0c 48 break;
mazgch 75:ce6e12067d0c 49 RELAX_MS(0);
mazgch 15:5eda64e5b9d1 50 }
mazgch 75:ce6e12067d0c 51 while (count);
mazgch 9:e7a5959ffae1 52 }
mazgch 13:e2446fcdc246 53 return (length - count);
mazgch 13:e2446fcdc246 54 }
mazgch 13:e2446fcdc246 55
mazgch 70:0a87d256cd24 56 void SerialPipe::txCopy(void)
mazgch 9:e7a5959ffae1 57 {
mazgch 15:5eda64e5b9d1 58 while (_SerialPipeBase::writeable() && _pipeTx.readable())
mazgch 11:b084552b03fe 59 {
mazgch 13:e2446fcdc246 60 char c = _pipeTx.getc();
mazgch 15:5eda64e5b9d1 61 _SerialPipeBase::_base_putc(c);
mazgch 11:b084552b03fe 62 }
mazgch 9:e7a5959ffae1 63 }
mazgch 9:e7a5959ffae1 64
mazgch 70:0a87d256cd24 65 void SerialPipe::txIrqBuf(void)
mazgch 70:0a87d256cd24 66 {
mazgch 70:0a87d256cd24 67 txCopy();
mazgch 70:0a87d256cd24 68 // detach tx isr if we are done
mazgch 70:0a87d256cd24 69 if (!_pipeTx.readable())
mazgch 70:0a87d256cd24 70 attach(NULL, TxIrq);
mazgch 70:0a87d256cd24 71 }
mazgch 70:0a87d256cd24 72
mazgch 13:e2446fcdc246 73 void SerialPipe::txStart(void)
mazgch 13:e2446fcdc246 74 {
mazgch 70:0a87d256cd24 75 // disable the tx isr to avoid interruption
mazgch 70:0a87d256cd24 76 attach(NULL, TxIrq);
mazgch 70:0a87d256cd24 77 txCopy();
mazgch 70:0a87d256cd24 78 // attach the tx isr to handle the remaining data
mazgch 70:0a87d256cd24 79 if (_pipeTx.readable())
mazgch 70:0a87d256cd24 80 attach(this, &SerialPipe::txIrqBuf, TxIrq);
mazgch 13:e2446fcdc246 81 }
mazgch 13:e2446fcdc246 82
mazgch 9:e7a5959ffae1 83 // rx channel
mazgch 9:e7a5959ffae1 84 int SerialPipe::readable(void)
mazgch 9:e7a5959ffae1 85 {
mazgch 9:e7a5959ffae1 86 return _pipeRx.readable();
mazgch 9:e7a5959ffae1 87 }
mazgch 9:e7a5959ffae1 88
mazgch 9:e7a5959ffae1 89 int SerialPipe::getc(void)
mazgch 9:e7a5959ffae1 90 {
mazgch 15:5eda64e5b9d1 91 if (!_pipeRx.readable())
mazgch 15:5eda64e5b9d1 92 return EOF;
mazgch 15:5eda64e5b9d1 93 return _pipeRx.getc();
mazgch 13:e2446fcdc246 94 }
mazgch 13:e2446fcdc246 95
mazgch 13:e2446fcdc246 96 int SerialPipe::get(void* buffer, int length, bool blocking)
mazgch 13:e2446fcdc246 97 {
mazgch 13:e2446fcdc246 98 return _pipeRx.get((char*)buffer,length,blocking);
mazgch 13:e2446fcdc246 99 }
mazgch 13:e2446fcdc246 100
mazgch 9:e7a5959ffae1 101 void SerialPipe::rxIrqBuf(void)
mazgch 9:e7a5959ffae1 102 {
mazgch 15:5eda64e5b9d1 103 while (_SerialPipeBase::readable())
mazgch 9:e7a5959ffae1 104 {
mazgch 15:5eda64e5b9d1 105 char c = _SerialPipeBase::_base_getc();
mazgch 9:e7a5959ffae1 106 if (_pipeRx.writeable())
mazgch 13:e2446fcdc246 107 _pipeRx.putc(c);
mazgch 9:e7a5959ffae1 108 else
mazgch 9:e7a5959ffae1 109 /* overflow */;
mazgch 9:e7a5959ffae1 110 }
mazgch 9:e7a5959ffae1 111 }
mazgch 9:e7a5959ffae1 112