Junichi Katsu / Mbed 2 deprecated IFTTT_Temperature

Simpe IoT BoardにGrove温度センサを繋げてIFTTTにプッシュするプログラムです。

Dependencies:   mbed

SoftSerialSendOnly/SoftSerialSendOnry_tx.cpp@0:26b07836cf44, 2015-11-13 (annotated)

Committer:
jksoft
Date:
Fri Nov 13 07:55:43 2015 +0000
Revision:
0:26b07836cf44
??

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jksoft 0:26b07836cf44 1 #include "SoftSerialSendOnry.h"
jksoft 0:26b07836cf44 2
jksoft 0:26b07836cf44 3 int SoftSerialSendOnry::_putc(int c)
jksoft 0:26b07836cf44 4 {
jksoft 0:26b07836cf44 5 while(!writeable());
jksoft 0:26b07836cf44 6 prepare_tx(c);
jksoft 0:26b07836cf44 7 tx_bit = 0;
jksoft 0:26b07836cf44 8 txticker.prime();
jksoft 0:26b07836cf44 9 tx_handler();
jksoft 0:26b07836cf44 10 return 0;
jksoft 0:26b07836cf44 11 }
jksoft 0:26b07836cf44 12
jksoft 0:26b07836cf44 13 void SoftSerialSendOnry::send_break(void) {
jksoft 0:26b07836cf44 14 while(!writeable());
jksoft 0:26b07836cf44 15 tx_bit = 0; //Just to make sure it appears as non-writable to other threads/IRQs
jksoft 0:26b07836cf44 16 tx->write(0);
jksoft 0:26b07836cf44 17 wait_us((bit_period * _total_bits * 3) / 2);
jksoft 0:26b07836cf44 18 tx->write(1);
jksoft 0:26b07836cf44 19 tx_bit = -1;
jksoft 0:26b07836cf44 20 }
jksoft 0:26b07836cf44 21
jksoft 0:26b07836cf44 22 int SoftSerialSendOnry::writeable(void)
jksoft 0:26b07836cf44 23 {
jksoft 0:26b07836cf44 24 if (!tx_en)
jksoft 0:26b07836cf44 25 return false;
jksoft 0:26b07836cf44 26 if (tx_bit == -1)
jksoft 0:26b07836cf44 27 return true;
jksoft 0:26b07836cf44 28 return false;
jksoft 0:26b07836cf44 29 }
jksoft 0:26b07836cf44 30
jksoft 0:26b07836cf44 31 void SoftSerialSendOnry::tx_handler(void)
jksoft 0:26b07836cf44 32 {
jksoft 0:26b07836cf44 33 if (tx_bit == _total_bits) {
jksoft 0:26b07836cf44 34 tx_bit = -1;
jksoft 0:26b07836cf44 35 fpointer[TxIrq].call();
jksoft 0:26b07836cf44 36 return;
jksoft 0:26b07836cf44 37 }
jksoft 0:26b07836cf44 38
jksoft 0:26b07836cf44 39 //Flip output
jksoft 0:26b07836cf44 40 int cur_out = tx->read();
jksoft 0:26b07836cf44 41 tx->write(!cur_out);
jksoft 0:26b07836cf44 42
jksoft 0:26b07836cf44 43 //Calculate when to do it again
jksoft 0:26b07836cf44 44 int count = bit_period;
jksoft 0:26b07836cf44 45 tx_bit++;
jksoft 0:26b07836cf44 46 while(((_char >> tx_bit) & 0x01) == !cur_out) {
jksoft 0:26b07836cf44 47 count+=bit_period;
jksoft 0:26b07836cf44 48 tx_bit++;
jksoft 0:26b07836cf44 49 }
jksoft 0:26b07836cf44 50
jksoft 0:26b07836cf44 51 txticker.setNext(count);
jksoft 0:26b07836cf44 52 }
jksoft 0:26b07836cf44 53
jksoft 0:26b07836cf44 54 void SoftSerialSendOnry::prepare_tx(int c)
jksoft 0:26b07836cf44 55 {
jksoft 0:26b07836cf44 56 _char = c << 1;
jksoft 0:26b07836cf44 57
jksoft 0:26b07836cf44 58 bool parity;
jksoft 0:26b07836cf44 59 switch (_parity) {
jksoft 0:26b07836cf44 60 case Forced1:
jksoft 0:26b07836cf44 61 _char |= 1 << (_bits + 1);
jksoft 0:26b07836cf44 62 case Even:
jksoft 0:26b07836cf44 63 parity = false;
jksoft 0:26b07836cf44 64 for (int i = 0; i<_bits; i++) {
jksoft 0:26b07836cf44 65 if (((_char >> i) & 0x01) == 1)
jksoft 0:26b07836cf44 66 parity = !parity;
jksoft 0:26b07836cf44 67 }
jksoft 0:26b07836cf44 68 _char |= parity << (_bits + 1);
jksoft 0:26b07836cf44 69 case Odd:
jksoft 0:26b07836cf44 70 parity = true;
jksoft 0:26b07836cf44 71 for (int i = 0; i<_bits; i++) {
jksoft 0:26b07836cf44 72 if (((_char >> i) & 0x01) == 1)
jksoft 0:26b07836cf44 73 parity = !parity;
jksoft 0:26b07836cf44 74 }
jksoft 0:26b07836cf44 75 _char |= parity << (_bits + 1);
jksoft 0:26b07836cf44 76 }
jksoft 0:26b07836cf44 77
jksoft 0:26b07836cf44 78 _char |= 0xFFFF << (1 + _bits + (bool)_parity);
jksoft 0:26b07836cf44 79 _char &= ~(1<<_total_bits);
jksoft 0:26b07836cf44 80 }