Simplified oscilloscope using DISCO-F746. Input: MEMS microphone. DISCO-F746 による簡易オシロスコープ.入力:MEMS マイク.
Dependencies: F746_GUI F746_SAI_IO mbed
WaveformDisplay.cpp@3:dc29fbcf1b48, 2017-03-16 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Thu Mar 16 12:04:48 2017 +0000
- Revision:
- 3:dc29fbcf1b48
- Parent:
- 2:1fa4647505bf
4
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
MikamiUitOpen | 1:a53d220362d4 | 1 | //----------------------------------------------------------- |
MikamiUitOpen | 1:a53d220362d4 | 2 | // 波形表示のためのクラス |
MikamiUitOpen | 1:a53d220362d4 | 3 | // |
MikamiUitOpen | 3:dc29fbcf1b48 | 4 | // 2017/03/16, Copyright (c) 2017 MIKAMI, Naoki |
MikamiUitOpen | 1:a53d220362d4 | 5 | //----------------------------------------------------------- |
MikamiUitOpen | 1:a53d220362d4 | 6 | |
MikamiUitOpen | 1:a53d220362d4 | 7 | #include "WaveformDisplay.hpp" |
MikamiUitOpen | 1:a53d220362d4 | 8 | |
MikamiUitOpen | 1:a53d220362d4 | 9 | // 波形表示 |
MikamiUitOpen | 1:a53d220362d4 | 10 | void WaveformDisplay::Execute() |
MikamiUitOpen | 1:a53d220362d4 | 11 | { |
MikamiUitOpen | 1:a53d220362d4 | 12 | // 以前の波形を消去 |
MikamiUitOpen | 2:1fa4647505bf | 13 | lcd_.SetTextColor(BACK_COLOR_); |
MikamiUitOpen | 2:1fa4647505bf | 14 | lcd_.FillRect(X0_, Y0_-LIMIT_, N_DATA_, LIMIT_*2+1); |
MikamiUitOpen | 1:a53d220362d4 | 15 | |
MikamiUitOpen | 1:a53d220362d4 | 16 | // 横軸の描画 |
MikamiUitOpen | 2:1fa4647505bf | 17 | lcd_.SetTextColor(LCD_COLOR_CYAN); |
MikamiUitOpen | 2:1fa4647505bf | 18 | lcd_.DrawLine(X0_-5, Y0_, X0_+N_DATA_+5, Y0_); |
MikamiUitOpen | 1:a53d220362d4 | 19 | |
MikamiUitOpen | 1:a53d220362d4 | 20 | // 波形の描画 |
MikamiUitOpen | 2:1fa4647505bf | 21 | lcd_.SetTextColor(LCD_COLOR_WHITE); |
MikamiUitOpen | 1:a53d220362d4 | 22 | uint16_t x1 = X0_; |
MikamiUitOpen | 1:a53d220362d4 | 23 | uint16_t y1 = Clip(xn_[0]); |
MikamiUitOpen | 1:a53d220362d4 | 24 | for (int n=1; n<N_DATA_; n++) |
MikamiUitOpen | 1:a53d220362d4 | 25 | { |
MikamiUitOpen | 1:a53d220362d4 | 26 | uint16_t x2 = X0_ + n; |
MikamiUitOpen | 1:a53d220362d4 | 27 | uint16_t y2 = Clip(xn_[n]); |
MikamiUitOpen | 2:1fa4647505bf | 28 | lcd_.DrawLine(x1, y1, x2, y2); |
MikamiUitOpen | 1:a53d220362d4 | 29 | x1 = x2; |
MikamiUitOpen | 1:a53d220362d4 | 30 | y1 = y2; |
MikamiUitOpen | 1:a53d220362d4 | 31 | } |
MikamiUitOpen | 1:a53d220362d4 | 32 | } |
MikamiUitOpen | 1:a53d220362d4 | 33 | |
MikamiUitOpen | 2:1fa4647505bf | 34 | // 縦方向のクリッピングと縦方向の位置の移動 |
MikamiUitOpen | 1:a53d220362d4 | 35 | uint16_t WaveformDisplay::Clip(int16_t xn) |
MikamiUitOpen | 1:a53d220362d4 | 36 | { |
MikamiUitOpen | 1:a53d220362d4 | 37 | int16_t x = xn >> R_SHIFT_; // スケーリング |
MikamiUitOpen | 1:a53d220362d4 | 38 | if (x > LIMIT_ ) x = LIMIT_; |
MikamiUitOpen | 1:a53d220362d4 | 39 | if (x < -LIMIT_ ) x = -LIMIT_ ; |
MikamiUitOpen | 3:dc29fbcf1b48 | 40 | return Y0_ - x; |
MikamiUitOpen | 1:a53d220362d4 | 41 | } |