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@7:1048beb741ef, 2015-07-25 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Sat Jul 25 06:31:46 2015 +0000
- Revision:
- 7:1048beb741ef
- Parent:
- 5:19e433ec0a20
8
Who changed what in which revision?
User | Revision | Line number | New 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 | } |