不韋 呂 / SerialTxRxIntr

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependents:   F446_FunctionGenerator F446_UpSampling_GraphicEqualizer F446_UpSampling_ReverbSystem F446_UpSampling_FrqShifter_Weaver ... more

SerialTxIntr.cpp@0:6b652858f92d, 2018-06-11 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Jun 11 10:38:25 2018 +0000
Revision:
0:6b652858f92d
Child:
4:fb847a82f735
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:6b652858f92d 1 //-------------------------------------------------------------
MikamiUitOpen 0:6b652858f92d 2 // Nucleo ボードの USB コネクタに対応するシリアルポート送信割込みで
MikamiUitOpen 0:6b652858f92d 3 // キャラクタの送信をサポ－トするクラス
MikamiUitOpen 0:6b652858f92d 4 //
MikamiUitOpen 0:6b652858f92d 5 // ボーレートのデフォルト値は 9,600 boud
MikamiUitOpen 0:6b652858f92d 6 //
MikamiUitOpen 0:6b652858f92d 7 // 2018/05/29, Copyright (c) 2018 MIKAMI, Naoki
MikamiUitOpen 0:6b652858f92d 8 //-------------------------------------------------------------
MikamiUitOpen 0:6b652858f92d 9
MikamiUitOpen 0:6b652858f92d 10 #include "SerialTxIntr.hpp"
MikamiUitOpen 0:6b652858f92d 11
MikamiUitOpen 0:6b652858f92d 12 // コンストラクタ
MikamiUitOpen 0:6b652858f92d 13 SerialTxIntr::SerialTxIntr(Serial &tx) : tx_(tx)
MikamiUitOpen 0:6b652858f92d 14 {
MikamiUitOpen 0:6b652858f92d 15 tx_.attach(callback(this, &SerialTxIntr::TxIsr), Serial::TxIrq);
MikamiUitOpen 0:6b652858f92d 16 }
MikamiUitOpen 0:6b652858f92d 17
MikamiUitOpen 0:6b652858f92d 18 // 送信データ書き込み
MikamiUitOpen 0:6b652858f92d 19 void SerialTxIntr::TxWrite(char c)
MikamiUitOpen 0:6b652858f92d 20 {
MikamiUitOpen 0:6b652858f92d 21 USART2->CR1 &= ~USART_CR1_TXEIE; // 送信割込み禁止
MikamiUitOpen 0:6b652858f92d 22 // 送信レジスタ (DR) が空でかつ送信バッファが空かどうか調べる
MikamiUitOpen 0:6b652858f92d 23 if ( que_.empty() && // 両者が空の場合
MikamiUitOpen 0:6b652858f92d 24 ((USART2->SR && USART_SR_TXE_Msk) == USART_SR_TXE) )
MikamiUitOpen 0:6b652858f92d 25 USART2->DR = c; // 送信レジスタにデータを書き込む
MikamiUitOpen 0:6b652858f92d 26 else // 少なくとも一方が空ではない場合
MikamiUitOpen 0:6b652858f92d 27 que_.push(c); // 送信バッファにデータを格納
MikamiUitOpen 0:6b652858f92d 28 USART2->CR1 |= USART_CR1_TXEIE; // 送信割込み許可
MikamiUitOpen 0:6b652858f92d 29 }
MikamiUitOpen 0:6b652858f92d 30
MikamiUitOpen 0:6b652858f92d 31 // シリアルポート送信割込みサービスルーチン
MikamiUitOpen 0:6b652858f92d 32 void SerialTxIntr::TxIsr()
MikamiUitOpen 0:6b652858f92d 33 {
MikamiUitOpen 0:6b652858f92d 34 if (!que_.empty())
MikamiUitOpen 0:6b652858f92d 35 {
MikamiUitOpen 0:6b652858f92d 36 USART2->DR = que_.front(); // 送信用バッファから取り出したデータを送信レジスタへ書き込む
MikamiUitOpen 0:6b652858f92d 37 que_.pop(); // 先頭のデータを消去
MikamiUitOpen 0:6b652858f92d 38 }
MikamiUitOpen 0:6b652858f92d 39 else
MikamiUitOpen 0:6b652858f92d 40 USART2->CR1 &= ~USART_CR1_TXEIE; // 送信割込み禁止
MikamiUitOpen 0:6b652858f92d 41 }
MikamiUitOpen 0:6b652858f92d 42
MikamiUitOpen 0:6b652858f92d 43 // static メンバの実体の宣言/初期化
MikamiUitOpen 0:6b652858f92d 44 queue<char> SerialTxIntr::que_;