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@0:b26f86125165, 2014-10-30 (annotated)

Committer:
MikamiUitOpen
Date:
Thu Oct 30 00:38:14 2014 +0000
Revision:
0:b26f86125165
Child:
2:a19243a20882
0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:b26f86125165 1 //--------------------------------------------------------------
MikamiUitOpen 0:b26f86125165 2 // 移動平均, 平均数：1, 2, 4, 8, 16, 32, 64：スイッチで選択
MikamiUitOpen 0:b26f86125165 3 // スイッチの状態を printf() で表示する
MikamiUitOpen 0:b26f86125165 4 // Analog Input : A0
MikamiUitOpen 0:b26f86125165 5 // Analog Output: MCP4922 using SPI
MikamiUitOpen 0:b26f86125165 6 // 2014/10/30, Copyright (c) 2014 MIKAMI, Naoki
MikamiUitOpen 0:b26f86125165 7 //--------------------------------------------------------------
MikamiUitOpen 0:b26f86125165 8
MikamiUitOpen 0:b26f86125165 9 #include "mbed.h"
MikamiUitOpen 0:b26f86125165 10
MikamiUitOpen 0:b26f86125165 11 #include "ADC_Interrupt.hpp" // for ADC using interrupt
MikamiUitOpen 0:b26f86125165 12 #include "DAC_MCP4922.hpp" // for DAC MCP4922
MikamiUitOpen 0:b26f86125165 13 #include "ScfClockTim3.hpp" // for clock supplied to SCF
MikamiUitOpen 0:b26f86125165 14
MikamiUitOpen 0:b26f86125165 15 using namespace Mikami;
MikamiUitOpen 0:b26f86125165 16
MikamiUitOpen 0:b26f86125165 17 const int FS_ = 12000; // Sampling frequency: 12 kHz
MikamiUitOpen 0:b26f86125165 18 ADC_Intr adc_(A0, FS_); // for AD using interrupt
MikamiUitOpen 0:b26f86125165 19 DAC_MCP4922 myDac_; // for DA
MikamiUitOpen 0:b26f86125165 20
MikamiUitOpen 0:b26f86125165 21 DigitalIn sw1_(D2, PullDown);
MikamiUitOpen 0:b26f86125165 22 DigitalIn sw2_(D3, PullDown);
MikamiUitOpen 0:b26f86125165 23 DigitalIn sw4_(D4, PullDown);
MikamiUitOpen 0:b26f86125165 24 DigitalIn sw8_(D5, PullDown);
MikamiUitOpen 0:b26f86125165 25
MikamiUitOpen 0:b26f86125165 26 const int M_ = 64; // Maximum of average count
MikamiUitOpen 0:b26f86125165 27 float xn_[M_];
MikamiUitOpen 0:b26f86125165 28 volatile int nAv_; // "volatile": to make sure
MikamiUitOpen 0:b26f86125165 29
MikamiUitOpen 0:b26f86125165 30 // Interrupt service routine for ADC
MikamiUitOpen 0:b26f86125165 31 void AdcIsr()
MikamiUitOpen 0:b26f86125165 32 {
MikamiUitOpen 0:b26f86125165 33 xn_[0] = adc_.Read(); // Read from A0
MikamiUitOpen 0:b26f86125165 34 //-----------------------------------------------
MikamiUitOpen 0:b26f86125165 35
MikamiUitOpen 0:b26f86125165 36 float yn = 0;
MikamiUitOpen 0:b26f86125165 37 for (int k=0; k<nAv_; k++) yn = yn + xn_[k];
MikamiUitOpen 0:b26f86125165 38 yn = yn/(float)nAv_; // yn: average
MikamiUitOpen 0:b26f86125165 39
MikamiUitOpen 0:b26f86125165 40 // Update input buffer
MikamiUitOpen 0:b26f86125165 41 for (int k = nAv_-1; k>0; k--)
MikamiUitOpen 0:b26f86125165 42 xn_[k] = xn_[k-1];
MikamiUitOpen 0:b26f86125165 43
MikamiUitOpen 0:b26f86125165 44 //-----------------------------------------------
MikamiUitOpen 0:b26f86125165 45 myDac_.Write(yn); // Write to DAC
MikamiUitOpen 0:b26f86125165 46 }
MikamiUitOpen 0:b26f86125165 47
MikamiUitOpen 0:b26f86125165 48 int main()
MikamiUitOpen 0:b26f86125165 49 {
MikamiUitOpen 0:b26f86125165 50 ScfClockTim3(500000); // cutoff frequency: 5 kHz
MikamiUitOpen 0:b26f86125165 51 adc_.SetIntrVec(AdcIsr); // Assign ISR for ADC interrupt
MikamiUitOpen 0:b26f86125165 52
MikamiUitOpen 0:b26f86125165 53 for (int n=0; n<M_; n++) xn_[n] = 0;
MikamiUitOpen 0:b26f86125165 54
MikamiUitOpen 0:b26f86125165 55 while (true)
MikamiUitOpen 0:b26f86125165 56 {
MikamiUitOpen 0:b26f86125165 57 int sw = (sw8_ << 3) | (sw4_ << 2) | (sw2_ << 1) | sw1_;
MikamiUitOpen 0:b26f86125165 58 nAv_ = 1 << sw;
MikamiUitOpen 0:b26f86125165 59 if (nAv_ > 64) nAv_ = 64;
MikamiUitOpen 0:b26f86125165 60 printf("\r\nnAv = %d, sw = %d", nAv_, sw);
MikamiUitOpen 0:b26f86125165 61
MikamiUitOpen 0:b26f86125165 62 wait(0.5f);
MikamiUitOpen 0:b26f86125165 63 }
MikamiUitOpen 0:b26f86125165 64 }