nguyen hoang / Mbed OS Dot-AT-Firmware-Khang1810218

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Dependencies:   MTS-Serial libmDot-dev-mbed5-deprecated

ATSerialFlowControl.cpp@1:c1c6549b9333, 2018-10-22 (annotated)

Committer:
nguyenhoang9x5555
Date:
Mon Oct 22 01:56:09 2018 +0000
Revision:
1:c1c6549b9333
Parent:
0:3c869a8cb8f8 
hey

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nguyenhoang9x5555 0:3c869a8cb8f8 1 #include "mbed.h"
nguyenhoang9x5555 0:3c869a8cb8f8 2 #include "ATSerialFlowControl.h"
nguyenhoang9x5555 0:3c869a8cb8f8 3 #include "MTSLog.h"
nguyenhoang9x5555 0:3c869a8cb8f8 4 #include "Utils.h"
nguyenhoang9x5555 0:3c869a8cb8f8 5
nguyenhoang9x5555 0:3c869a8cb8f8 6 using namespace mts;
nguyenhoang9x5555 0:3c869a8cb8f8 7
nguyenhoang9x5555 0:3c869a8cb8f8 8 ATSerialFlowControl::ATSerialFlowControl(PinName TXD, PinName RXD, PinName RTS, PinName CTS, int txBufSize, int rxBufSize)
nguyenhoang9x5555 0:3c869a8cb8f8 9 : ATSerial(TXD, RXD, txBufSize, rxBufSize)
nguyenhoang9x5555 0:3c869a8cb8f8 10 , rxReadyFlag(false)
nguyenhoang9x5555 0:3c869a8cb8f8 11 , rts(RTS)
nguyenhoang9x5555 0:3c869a8cb8f8 12 , cts(CTS)
nguyenhoang9x5555 0:3c869a8cb8f8 13 {
nguyenhoang9x5555 0:3c869a8cb8f8 14 notifyStartSending();
nguyenhoang9x5555 0:3c869a8cb8f8 15
nguyenhoang9x5555 0:3c869a8cb8f8 16 // Calculate the high and low watermark values
nguyenhoang9x5555 0:3c869a8cb8f8 17 highThreshold = mts_max(rxBufSize - 10, rxBufSize * 0.85);
nguyenhoang9x5555 0:3c869a8cb8f8 18 lowThreshold = rxBufSize * 0.3;
nguyenhoang9x5555 0:3c869a8cb8f8 19
nguyenhoang9x5555 0:3c869a8cb8f8 20 // Setup the low watermark callback on the internal receive buffer
nguyenhoang9x5555 0:3c869a8cb8f8 21 rxBuffer.attach(this, &ATSerialFlowControl::notifyStartSending, lowThreshold, LESS);
nguyenhoang9x5555 0:3c869a8cb8f8 22 }
nguyenhoang9x5555 0:3c869a8cb8f8 23
nguyenhoang9x5555 0:3c869a8cb8f8 24 ATSerialFlowControl::~ATSerialFlowControl()
nguyenhoang9x5555 0:3c869a8cb8f8 25 {
nguyenhoang9x5555 0:3c869a8cb8f8 26 }
nguyenhoang9x5555 0:3c869a8cb8f8 27
nguyenhoang9x5555 0:3c869a8cb8f8 28 //Override the rxClear function to make sure that flow control lines are set correctly.
nguyenhoang9x5555 0:3c869a8cb8f8 29 void ATSerialFlowControl::rxClear()
nguyenhoang9x5555 0:3c869a8cb8f8 30 {
nguyenhoang9x5555 0:3c869a8cb8f8 31 MTSBufferedIO::rxClear();
nguyenhoang9x5555 0:3c869a8cb8f8 32 notifyStartSending();
nguyenhoang9x5555 0:3c869a8cb8f8 33 }
nguyenhoang9x5555 0:3c869a8cb8f8 34
nguyenhoang9x5555 0:3c869a8cb8f8 35 void ATSerialFlowControl::notifyStartSending()
nguyenhoang9x5555 0:3c869a8cb8f8 36 {
nguyenhoang9x5555 0:3c869a8cb8f8 37 if(!rxReadyFlag) {
nguyenhoang9x5555 0:3c869a8cb8f8 38 rts.write(0);
nguyenhoang9x5555 0:3c869a8cb8f8 39 rxReadyFlag = true;
nguyenhoang9x5555 0:3c869a8cb8f8 40 //printf("RTS LOW: READY - RX[%d/%d]\r\n", rxBuffer.size(), rxBuffer.capacity());
nguyenhoang9x5555 0:3c869a8cb8f8 41 }
nguyenhoang9x5555 0:3c869a8cb8f8 42 }
nguyenhoang9x5555 0:3c869a8cb8f8 43
nguyenhoang9x5555 0:3c869a8cb8f8 44 void ATSerialFlowControl::notifyStopSending()
nguyenhoang9x5555 0:3c869a8cb8f8 45 {
nguyenhoang9x5555 0:3c869a8cb8f8 46 if(rxReadyFlag) {
nguyenhoang9x5555 0:3c869a8cb8f8 47 rts.write(1);
nguyenhoang9x5555 0:3c869a8cb8f8 48 rxReadyFlag = false;
nguyenhoang9x5555 0:3c869a8cb8f8 49 //printf("RTS HIGH: NOT-READY - RX[%d/%d]\r\n", rxBuffer.size(), rxBuffer.capacity());
nguyenhoang9x5555 0:3c869a8cb8f8 50 }
nguyenhoang9x5555 0:3c869a8cb8f8 51 }
nguyenhoang9x5555 0:3c869a8cb8f8 52
nguyenhoang9x5555 0:3c869a8cb8f8 53 void ATSerialFlowControl::handleRead()
nguyenhoang9x5555 0:3c869a8cb8f8 54 {
nguyenhoang9x5555 0:3c869a8cb8f8 55 ATSerial::handleRead();
nguyenhoang9x5555 0:3c869a8cb8f8 56 if (rxBuffer.size() >= highThreshold) {
nguyenhoang9x5555 0:3c869a8cb8f8 57 notifyStopSending();
nguyenhoang9x5555 0:3c869a8cb8f8 58 }
nguyenhoang9x5555 0:3c869a8cb8f8 59 }
nguyenhoang9x5555 0:3c869a8cb8f8 60
nguyenhoang9x5555 0:3c869a8cb8f8 61 void ATSerialFlowControl::handleWrite()
nguyenhoang9x5555 0:3c869a8cb8f8 62 {
nguyenhoang9x5555 0:3c869a8cb8f8 63 while(txBuffer.size() != 0) {
nguyenhoang9x5555 0:3c869a8cb8f8 64 if (_serial->writeable() && cts.read() == 0) {
nguyenhoang9x5555 0:3c869a8cb8f8 65 char byte;
nguyenhoang9x5555 0:3c869a8cb8f8 66 if(txBuffer.read(byte) == 1) {
nguyenhoang9x5555 0:3c869a8cb8f8 67 _serial->attach(NULL, Serial::RxIrq);
nguyenhoang9x5555 0:3c869a8cb8f8 68 _serial->putc(byte);
nguyenhoang9x5555 0:3c869a8cb8f8 69 _serial->attach(this, &ATSerialFlowControl::handleRead, Serial::RxIrq);
nguyenhoang9x5555 0:3c869a8cb8f8 70 }
nguyenhoang9x5555 0:3c869a8cb8f8 71 } else {
nguyenhoang9x5555 0:3c869a8cb8f8 72 return;
nguyenhoang9x5555 0:3c869a8cb8f8 73 }
nguyenhoang9x5555 0:3c869a8cb8f8 74 }
nguyenhoang9x5555 0:3c869a8cb8f8 75 }