不韋 呂 / Mbed 2 deprecated UIT2_MovingAv_Intr

Moving average using interrupt for ST Nucleo F401RE. The number of average is controled by sw. This program displays the number of average on LCD device connected by I2C.

Dependencies:   UITDSP_ADDA mbed UIT_ACM1602NI UIT_AQM1602

main.cpp@5:19e433ec0a20, 2015-07-25 (annotated)

Committer:
MikamiUitOpen
Date:
Sat Jul 25 05:31:40 2015 +0000
Revision:
5:19e433ec0a20
Parent:
4:7635c95836a0 
6

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:b26f86125165 1 //--------------------------------------------------------------
MikamiUitOpen 4:7635c95836a0 2 // 移動平均, 平均数：1, 2, 4, 8, 16, 32, 64：スイッチで選択
MikamiUitOpen 4:7635c95836a0 3 // 平均するデータ数，スイッチの状態を LCD 表示器に表示する
MikamiUitOpen 4:7635c95836a0 4 //
MikamiUitOpen 0:b26f86125165 5 // Analog Input : A0
MikamiUitOpen 4:7635c95836a0 6 // Analog Output: MCP4921 or 4922 using SPI
MikamiUitOpen 5:19e433ec0a20 7 // 2015/07/25, Copyright (c) 2015 MIKAMI, Naoki
MikamiUitOpen 0:b26f86125165 8 //--------------------------------------------------------------
MikamiUitOpen 0:b26f86125165 9
MikamiUitOpen 0:b26f86125165 10 #include "mbed.h"
MikamiUitOpen 0:b26f86125165 11
MikamiUitOpen 0:b26f86125165 12 #include "ADC_Interrupt.hpp" // for ADC using interrupt
MikamiUitOpen 5:19e433ec0a20 13 #include "DAC_MCP4921.hpp" // for DAC MCP4921, MCP4922
MikamiUitOpen 0:b26f86125165 14
MikamiUitOpen 0:b26f86125165 15 using namespace Mikami;
MikamiUitOpen 0:b26f86125165 16
MikamiUitOpen 4:7635c95836a0 17 // ACM1602Ni を使う場合は次の define 文をコメントにすること
MikamiUitOpen 5:19e433ec0a20 18 #define AQM1602
MikamiUitOpen 0:b26f86125165 19
MikamiUitOpen 4:7635c95836a0 20 #ifdef AQM1602
MikamiUitOpen 4:7635c95836a0 21 #include "AQM1602.hpp"
MikamiUitOpen 4:7635c95836a0 22 Aqm1602 Lcd_;
MikamiUitOpen 4:7635c95836a0 23 #else
MikamiUitOpen 4:7635c95836a0 24 #include "ACM1602NI.hpp"
MikamiUitOpen 4:7635c95836a0 25 Acm1602Ni Lcd_;
MikamiUitOpen 4:7635c95836a0 26 #endif
MikamiUitOpen 4:7635c95836a0 27
MikamiUitOpen 4:7635c95836a0 28 const int FS_ = 12000; // Sampling frequency: 12 kHz
MikamiUitOpen 4:7635c95836a0 29 ADC_Intr adc_(A0, FS_); // for AD using interrupt
MikamiUitOpen 5:19e433ec0a20 30 DAC_MCP4921 myDac_; // for DA
MikamiUitOpen 4:7635c95836a0 31
MikamiUitOpen 4:7635c95836a0 32 BusIn sw_(D2, D3, D4, D5); // for switch
MikamiUitOpen 0:b26f86125165 33
MikamiUitOpen 0:b26f86125165 34 const int M_ = 64; // Maximum of average count
MikamiUitOpen 0:b26f86125165 35 float xn_[M_];
MikamiUitOpen 0:b26f86125165 36 volatile int nAv_; // "volatile": to make sure
MikamiUitOpen 0:b26f86125165 37
MikamiUitOpen 0:b26f86125165 38 // Interrupt service routine for ADC
MikamiUitOpen 0:b26f86125165 39 void AdcIsr()
MikamiUitOpen 0:b26f86125165 40 {
MikamiUitOpen 0:b26f86125165 41 xn_[0] = adc_.Read(); // Read from A0
MikamiUitOpen 0:b26f86125165 42 //-----------------------------------------------
MikamiUitOpen 0:b26f86125165 43
MikamiUitOpen 0:b26f86125165 44 float yn = 0;
MikamiUitOpen 0:b26f86125165 45 for (int k=0; k<nAv_; k++) yn = yn + xn_[k];
MikamiUitOpen 0:b26f86125165 46 yn = yn/(float)nAv_; // yn: average
MikamiUitOpen 0:b26f86125165 47
MikamiUitOpen 0:b26f86125165 48 // Update input buffer
MikamiUitOpen 0:b26f86125165 49 for (int k = nAv_-1; k>0; k--)
MikamiUitOpen 0:b26f86125165 50 xn_[k] = xn_[k-1];
MikamiUitOpen 0:b26f86125165 51
MikamiUitOpen 0:b26f86125165 52 //-----------------------------------------------
MikamiUitOpen 0:b26f86125165 53 myDac_.Write(yn); // Write to DAC
MikamiUitOpen 0:b26f86125165 54 }
MikamiUitOpen 0:b26f86125165 55
MikamiUitOpen 0:b26f86125165 56 int main()
MikamiUitOpen 0:b26f86125165 57 {
MikamiUitOpen 2:a19243a20882 58 myDac_.ScfClockTim3(500000); // cutoff frequency: 5 kHz
MikamiUitOpen 4:7635c95836a0 59 sw_.mode(PullDown);
MikamiUitOpen 4:7635c95836a0 60 Lcd_.Clear();
MikamiUitOpen 4:7635c95836a0 61 adc_.SetIntrVec(AdcIsr); // Assign ISR for ADC interrupt
MikamiUitOpen 0:b26f86125165 62
MikamiUitOpen 0:b26f86125165 63 for (int n=0; n<M_; n++) xn_[n] = 0;
MikamiUitOpen 0:b26f86125165 64
MikamiUitOpen 0:b26f86125165 65 while (true)
MikamiUitOpen 0:b26f86125165 66 {
MikamiUitOpen 4:7635c95836a0 67 int sw = sw_.read();
MikamiUitOpen 0:b26f86125165 68 nAv_ = 1 << sw;
MikamiUitOpen 0:b26f86125165 69 if (nAv_ > 64) nAv_ = 64;
MikamiUitOpen 0:b26f86125165 70 printf("\r\nnAv = %d, sw = %d", nAv_, sw);
MikamiUitOpen 4:7635c95836a0 71 char str[17];
MikamiUitOpen 4:7635c95836a0 72 sprintf(str, "nAv : %2d", nAv_);
MikamiUitOpen 4:7635c95836a0 73 Lcd_.WriteStringXY(str, 0, 0);
MikamiUitOpen 4:7635c95836a0 74 sprintf(str, "sw : %2d", sw);
MikamiUitOpen 4:7635c95836a0 75 Lcd_.WriteStringXY(str, 0, 1);
MikamiUitOpen 0:b26f86125165 76
MikamiUitOpen 0:b26f86125165 77 wait(0.5f);
MikamiUitOpen 0:b26f86125165 78 }
MikamiUitOpen 0:b26f86125165 79 }