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@2:a19243a20882, 2014-11-12 (annotated)

Committer:
MikamiUitOpen
Date:
Wed Nov 12 10:36:56 2014 +0000
Revision:
2:a19243a20882
Parent:
0:b26f86125165
Child:
4:7635c95836a0
3

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 2:a19243a20882 6 // 2014/11/12, 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
MikamiUitOpen 0:b26f86125165 14 using namespace Mikami;
MikamiUitOpen 0:b26f86125165 15
MikamiUitOpen 0:b26f86125165 16 const int FS_ = 12000; // Sampling frequency: 12 kHz
MikamiUitOpen 0:b26f86125165 17 ADC_Intr adc_(A0, FS_); // for AD using interrupt
MikamiUitOpen 0:b26f86125165 18 DAC_MCP4922 myDac_; // for DA
MikamiUitOpen 0:b26f86125165 19
MikamiUitOpen 0:b26f86125165 20 DigitalIn sw1_(D2, PullDown);
MikamiUitOpen 0:b26f86125165 21 DigitalIn sw2_(D3, PullDown);
MikamiUitOpen 0:b26f86125165 22 DigitalIn sw4_(D4, PullDown);
MikamiUitOpen 0:b26f86125165 23 DigitalIn sw8_(D5, PullDown);
MikamiUitOpen 0:b26f86125165 24
MikamiUitOpen 0:b26f86125165 25 const int M_ = 64; // Maximum of average count
MikamiUitOpen 0:b26f86125165 26 float xn_[M_];
MikamiUitOpen 0:b26f86125165 27 volatile int nAv_; // "volatile": to make sure
MikamiUitOpen 0:b26f86125165 28
MikamiUitOpen 0:b26f86125165 29 // Interrupt service routine for ADC
MikamiUitOpen 0:b26f86125165 30 void AdcIsr()
MikamiUitOpen 0:b26f86125165 31 {
MikamiUitOpen 0:b26f86125165 32 xn_[0] = adc_.Read(); // Read from A0
MikamiUitOpen 0:b26f86125165 33 //-----------------------------------------------
MikamiUitOpen 0:b26f86125165 34
MikamiUitOpen 0:b26f86125165 35 float yn = 0;
MikamiUitOpen 0:b26f86125165 36 for (int k=0; k<nAv_; k++) yn = yn + xn_[k];
MikamiUitOpen 0:b26f86125165 37 yn = yn/(float)nAv_; // yn: average
MikamiUitOpen 0:b26f86125165 38
MikamiUitOpen 0:b26f86125165 39 // Update input buffer
MikamiUitOpen 0:b26f86125165 40 for (int k = nAv_-1; k>0; k--)
MikamiUitOpen 0:b26f86125165 41 xn_[k] = xn_[k-1];
MikamiUitOpen 0:b26f86125165 42
MikamiUitOpen 0:b26f86125165 43 //-----------------------------------------------
MikamiUitOpen 0:b26f86125165 44 myDac_.Write(yn); // Write to DAC
MikamiUitOpen 0:b26f86125165 45 }
MikamiUitOpen 0:b26f86125165 46
MikamiUitOpen 0:b26f86125165 47 int main()
MikamiUitOpen 0:b26f86125165 48 {
MikamiUitOpen 2:a19243a20882 49 myDac_.ScfClockTim3(500000); // cutoff frequency: 5 kHz
MikamiUitOpen 0:b26f86125165 50 adc_.SetIntrVec(AdcIsr); // Assign ISR for ADC interrupt
MikamiUitOpen 0:b26f86125165 51
MikamiUitOpen 0:b26f86125165 52 for (int n=0; n<M_; n++) xn_[n] = 0;
MikamiUitOpen 0:b26f86125165 53
MikamiUitOpen 0:b26f86125165 54 while (true)
MikamiUitOpen 0:b26f86125165 55 {
MikamiUitOpen 0:b26f86125165 56 int sw = (sw8_ << 3) | (sw4_ << 2) | (sw2_ << 1) | sw1_;
MikamiUitOpen 0:b26f86125165 57 nAv_ = 1 << sw;
MikamiUitOpen 0:b26f86125165 58 if (nAv_ > 64) nAv_ = 64;
MikamiUitOpen 0:b26f86125165 59 printf("\r\nnAv = %d, sw = %d", nAv_, sw);
MikamiUitOpen 0:b26f86125165 60
MikamiUitOpen 0:b26f86125165 61 wait(0.5f);
MikamiUitOpen 0:b26f86125165 62 }
MikamiUitOpen 0:b26f86125165 63 }