不韋 呂 / Mbed 2 deprecated ADDA_Prototype2_Interrupt

Prototype program of AD and DA using classes in UIT_ADDA. This program uses interrupt of ADC. Second channnel input is used to control volume of output for ST Nucleo F401RE. UIT_ADDA のクラスを使った AD および DA のためのプログラムの雛形．ADC の割り込みを使うバージョン．2番目のチャンネルの ADC の入力は，出力信号の大きさをコントロールするために使う．ST Nucleo F401 用．

Dependencies:   UIT_ACM1602NI UIT_ADDA mbed

main.cpp@12:4dcb3d21332c, 2014-12-31 (annotated)

Committer:
MikamiUitOpen
Date:
Wed Dec 31 10:45:10 2014 +0000
Revision:
12:4dcb3d21332c
Parent:
10:cec66d437a6e 
13

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:494ae18d3b30 1 //--------------------------------------------------------------
MikamiUitOpen 1:43a38eaed0fc 2 // 割り込みを使って AD DA を行う場合の雛形2（入力：2 チャンネル）
MikamiUitOpen 10:cec66d437a6e 3 // Analog Input : A0, A3 (A1: not used)
MikamiUitOpen 10:cec66d437a6e 4 // A3 is used to cotrol volume of output signal
MikamiUitOpen 0:494ae18d3b30 5 // Analog Output: MCP4922 using SPI
MikamiUitOpen 1:43a38eaed0fc 6 // A2: used for control volume of output
MikamiUitOpen 10:cec66d437a6e 7 // 2014/12/19, Copyright (c) 2014 MIKAMI, Naoki
MikamiUitOpen 0:494ae18d3b30 8 //--------------------------------------------------------------
MikamiUitOpen 0:494ae18d3b30 9
MikamiUitOpen 0:494ae18d3b30 10 #include "ADC_Interrupt.hpp" // for ADC using interrupt
MikamiUitOpen 0:494ae18d3b30 11 #include "DAC_MCP4922.hpp" // for DAC MCP4922
MikamiUitOpen 0:494ae18d3b30 12
MikamiUitOpen 0:494ae18d3b30 13 using namespace Mikami;
MikamiUitOpen 0:494ae18d3b30 14
MikamiUitOpen 2:8cbfd28344db 15 const int FS_ = 10000; // Sampling frequency: 10 kHz
MikamiUitOpen 4:063b26cc467a 16 ADC_Intr adc_(A0, FS_, A1, A2); // for AD
MikamiUitOpen 4:063b26cc467a 17 DAC_MCP4922 myDac_; // for DA
MikamiUitOpen 0:494ae18d3b30 18
MikamiUitOpen 0:494ae18d3b30 19 uint16_t a2_ = 0;
MikamiUitOpen 0:494ae18d3b30 20 uint16_t a21_ = 0;
MikamiUitOpen 0:494ae18d3b30 21 float vol_ = 1.0f;
MikamiUitOpen 0:494ae18d3b30 22
MikamiUitOpen 0:494ae18d3b30 23 // Interrupt service routine for ADC
MikamiUitOpen 0:494ae18d3b30 24 void AdcIsr()
MikamiUitOpen 0:494ae18d3b30 25 {
MikamiUitOpen 0:494ae18d3b30 26 float xn = adc_.Read(); // Read from A0
MikamiUitOpen 0:494ae18d3b30 27
MikamiUitOpen 0:494ae18d3b30 28 adc_.Select3rdChannel(); // Enable A2
MikamiUitOpen 0:494ae18d3b30 29 adc_.SoftStart(); // ADC start for A2 input
MikamiUitOpen 0:494ae18d3b30 30
MikamiUitOpen 0:494ae18d3b30 31 float yn = vol_*xn; // Volume control by VR
MikamiUitOpen 0:494ae18d3b30 32 myDac_.Write(yn); // to DAC
MikamiUitOpen 0:494ae18d3b30 33
MikamiUitOpen 0:494ae18d3b30 34 // Read value which controls volume
MikamiUitOpen 0:494ae18d3b30 35 a2_ = adc_.ReadWait_u16();
MikamiUitOpen 0:494ae18d3b30 36
MikamiUitOpen 0:494ae18d3b30 37 adc_.Select1stChannel(); // Enable A0
MikamiUitOpen 0:494ae18d3b30 38 adc_.ClearPending_EnableIRQ(); // Clear pending interrupt
MikamiUitOpen 0:494ae18d3b30 39 }
MikamiUitOpen 0:494ae18d3b30 40
MikamiUitOpen 0:494ae18d3b30 41 int main()
MikamiUitOpen 0:494ae18d3b30 42 {
MikamiUitOpen 10:cec66d437a6e 43 myDac_.ScfClockTim3(420000); // cutoff frequency: 4.2 kHz
MikamiUitOpen 0:494ae18d3b30 44 adc_.SetIntrVec(AdcIsr); // Assign ISR for ADC interrupt
MikamiUitOpen 0:494ae18d3b30 45
MikamiUitOpen 0:494ae18d3b30 46 while (true)
MikamiUitOpen 0:494ae18d3b30 47 {
MikamiUitOpen 0:494ae18d3b30 48 if (abs(a2_ - a21_) > 10)
MikamiUitOpen 0:494ae18d3b30 49 {
MikamiUitOpen 0:494ae18d3b30 50 vol_ = ((float)a2_)/4095.0f;
MikamiUitOpen 0:494ae18d3b30 51 a21_ = a2_;
MikamiUitOpen 0:494ae18d3b30 52 }
MikamiUitOpen 0:494ae18d3b30 53 wait(0.1f);
MikamiUitOpen 0:494ae18d3b30 54 }
MikamiUitOpen 0:494ae18d3b30 55 }