STM32の基板にもRTCとこいんでんちいっこいれる
ゴトッ
これはUSBのJTAGデバイスの普及間違いなしですね〜
いい時代になったものです…私はもう作ったからいいや(しれっと
昨日はLPC2388の基板にRTCとバックアップ用の電池付けましたが、STM32にも
同じ事やってみました。STM32もLPC2388と同じくVbatでバックアップできる
独立したパワードメインがあるのでコイン電池一個でRTCを動かせます。
CQ-STARMはVbatはジャンパ抵抗で切り離せられるようになっているので
改造も楽ちんです(他のリワークがきついけど)。こんな感じで各部品を実装です。
RTCのプログラムのサンプル
のプログラムをベースにRTC部分の割り込みと、UARTの受信割り込みを足しこんで
昨日のLPC2388のプログラムになるべく似せるようにしてます。
(どっちかと言うとSTMのがオリジナルなんだけどまぁいいや)
自己責任でどうぞ。あと32.768KHzの水晶は必ずつけるように!
ARM7TDMIに並行してCortexも本格的に覚えようかしら…ブログで公開するに
当たって深いとこまでいじって来たけどなかなか面白い。
-
免責・連絡先は↑のリンクを
↓SNSもやってます↓
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