A guitar Tuner project made by: Guarino Yuri Pota Giuseppe Sito Leonardo It is made up of a circuit of signal amplification(using LM386 OP-AMP), and a circuit of many LEDs that display if the guitar is tuned or not.
main.cpp@0:2529b7b37e9a, 2018-12-09 (annotated)
- Committer:
- gpota
- Date:
- Sun Dec 09 15:58:55 2018 +0000
- Revision:
- 0:2529b7b37e9a
- Child:
- 1:45d485b8966f
A guitar Tuner project made by; Guarino Yuri; Pota Giuseppe
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
gpota | 0:2529b7b37e9a | 1 | #include "mbed.h" |
gpota | 0:2529b7b37e9a | 2 | #include "mbed.h" |
gpota | 0:2529b7b37e9a | 3 | #include "arm_math.h" |
gpota | 0:2529b7b37e9a | 4 | #include "arm_const_structs.h" |
gpota | 0:2529b7b37e9a | 5 | #define SAMP_FREQ 2000 |
gpota | 0:2529b7b37e9a | 6 | |
gpota | 0:2529b7b37e9a | 7 | InterruptIn button(PC_13); |
gpota | 0:2529b7b37e9a | 8 | DigitalOut El(D2); |
gpota | 0:2529b7b37e9a | 9 | DigitalOut A(D3); |
gpota | 0:2529b7b37e9a | 10 | DigitalOut D(D4); |
gpota | 0:2529b7b37e9a | 11 | DigitalOut G(D5); |
gpota | 0:2529b7b37e9a | 12 | DigitalOut B(D6); |
gpota | 0:2529b7b37e9a | 13 | DigitalOut Eh(D7); |
gpota | 0:2529b7b37e9a | 14 | DigitalOut Led_Ok(D9); |
gpota | 0:2529b7b37e9a | 15 | DigitalOut Led_Down(D10); |
gpota | 0:2529b7b37e9a | 16 | DigitalOut Led_Up(D8); |
gpota | 0:2529b7b37e9a | 17 | Serial pc (SERIAL_TX,SERIAL_RX); |
gpota | 0:2529b7b37e9a | 18 | AnalogIn analog_value(A0); |
gpota | 0:2529b7b37e9a | 19 | const int FFT_LEN = 1024; |
gpota | 0:2529b7b37e9a | 20 | const int bins = 1000; |
gpota | 0:2529b7b37e9a | 21 | |
gpota | 0:2529b7b37e9a | 22 | float Ing[FFT_LEN]; |
gpota | 0:2529b7b37e9a | 23 | |
gpota | 0:2529b7b37e9a | 24 | const static arm_cfft_instance_f32 *S; |
gpota | 0:2529b7b37e9a | 25 | |
gpota | 0:2529b7b37e9a | 26 | float samples[FFT_LEN*2]; |
gpota | 0:2529b7b37e9a | 27 | float magnitudes[FFT_LEN]; |
gpota | 0:2529b7b37e9a | 28 | float freq_window[bins]; |
gpota | 0:2529b7b37e9a | 29 | |
gpota | 0:2529b7b37e9a | 30 | int c =0; |
gpota | 0:2529b7b37e9a | 31 | void selectNote() { |
gpota | 0:2529b7b37e9a | 32 | c++; |
gpota | 0:2529b7b37e9a | 33 | if(c==1) |
gpota | 0:2529b7b37e9a | 34 | { |
gpota | 0:2529b7b37e9a | 35 | El=1; |
gpota | 0:2529b7b37e9a | 36 | A=0; |
gpota | 0:2529b7b37e9a | 37 | D=0; |
gpota | 0:2529b7b37e9a | 38 | G=0; |
gpota | 0:2529b7b37e9a | 39 | B=0; |
gpota | 0:2529b7b37e9a | 40 | Eh=0; |
gpota | 0:2529b7b37e9a | 41 | } |
gpota | 0:2529b7b37e9a | 42 | else if(c==2) |
gpota | 0:2529b7b37e9a | 43 | { |
gpota | 0:2529b7b37e9a | 44 | El=0; |
gpota | 0:2529b7b37e9a | 45 | A=1; |
gpota | 0:2529b7b37e9a | 46 | D=0; |
gpota | 0:2529b7b37e9a | 47 | G=0; |
gpota | 0:2529b7b37e9a | 48 | B=0; |
gpota | 0:2529b7b37e9a | 49 | Eh=0; |
gpota | 0:2529b7b37e9a | 50 | |
gpota | 0:2529b7b37e9a | 51 | } |
gpota | 0:2529b7b37e9a | 52 | else if(c==3) |
gpota | 0:2529b7b37e9a | 53 | { |
gpota | 0:2529b7b37e9a | 54 | El=0; |
gpota | 0:2529b7b37e9a | 55 | A=0; |
gpota | 0:2529b7b37e9a | 56 | D=1; |
gpota | 0:2529b7b37e9a | 57 | G=0; |
gpota | 0:2529b7b37e9a | 58 | B=0; |
gpota | 0:2529b7b37e9a | 59 | Eh=0; |
gpota | 0:2529b7b37e9a | 60 | |
gpota | 0:2529b7b37e9a | 61 | } |
gpota | 0:2529b7b37e9a | 62 | |
gpota | 0:2529b7b37e9a | 63 | else if(c==4) |
gpota | 0:2529b7b37e9a | 64 | { |
gpota | 0:2529b7b37e9a | 65 | El=0; |
gpota | 0:2529b7b37e9a | 66 | A=0; |
gpota | 0:2529b7b37e9a | 67 | D=0; |
gpota | 0:2529b7b37e9a | 68 | G=1; |
gpota | 0:2529b7b37e9a | 69 | B=0; |
gpota | 0:2529b7b37e9a | 70 | Eh=0; |
gpota | 0:2529b7b37e9a | 71 | |
gpota | 0:2529b7b37e9a | 72 | } |
gpota | 0:2529b7b37e9a | 73 | |
gpota | 0:2529b7b37e9a | 74 | else if(c==5) |
gpota | 0:2529b7b37e9a | 75 | { |
gpota | 0:2529b7b37e9a | 76 | El=0; |
gpota | 0:2529b7b37e9a | 77 | A=0; |
gpota | 0:2529b7b37e9a | 78 | D=0; |
gpota | 0:2529b7b37e9a | 79 | G=0; |
gpota | 0:2529b7b37e9a | 80 | B=1; |
gpota | 0:2529b7b37e9a | 81 | Eh=0; |
gpota | 0:2529b7b37e9a | 82 | |
gpota | 0:2529b7b37e9a | 83 | } |
gpota | 0:2529b7b37e9a | 84 | |
gpota | 0:2529b7b37e9a | 85 | else if(c==6) |
gpota | 0:2529b7b37e9a | 86 | { |
gpota | 0:2529b7b37e9a | 87 | El=0; |
gpota | 0:2529b7b37e9a | 88 | A=0; |
gpota | 0:2529b7b37e9a | 89 | D=0; |
gpota | 0:2529b7b37e9a | 90 | G=0; |
gpota | 0:2529b7b37e9a | 91 | B=0; |
gpota | 0:2529b7b37e9a | 92 | Eh=1; |
gpota | 0:2529b7b37e9a | 93 | |
gpota | 0:2529b7b37e9a | 94 | |
gpota | 0:2529b7b37e9a | 95 | } |
gpota | 0:2529b7b37e9a | 96 | else if(c==7) |
gpota | 0:2529b7b37e9a | 97 | c=0; |
gpota | 0:2529b7b37e9a | 98 | |
gpota | 0:2529b7b37e9a | 99 | } |
gpota | 0:2529b7b37e9a | 100 | int main() { |
gpota | 0:2529b7b37e9a | 101 | El=0; |
gpota | 0:2529b7b37e9a | 102 | A=0; |
gpota | 0:2529b7b37e9a | 103 | D=0; |
gpota | 0:2529b7b37e9a | 104 | G=0; |
gpota | 0:2529b7b37e9a | 105 | B=0; |
gpota | 0:2529b7b37e9a | 106 | Eh=0; |
gpota | 0:2529b7b37e9a | 107 | |
gpota | 0:2529b7b37e9a | 108 | El=1;wait(0.1);El=0; |
gpota | 0:2529b7b37e9a | 109 | A=1;wait(0.1);A=0; |
gpota | 0:2529b7b37e9a | 110 | D=1;wait(0.1);D=0; |
gpota | 0:2529b7b37e9a | 111 | G=1;wait(0.1);G=0; |
gpota | 0:2529b7b37e9a | 112 | B=1;wait(0.1);B=0; |
gpota | 0:2529b7b37e9a | 113 | Eh=1;wait(0.1);Eh=0; |
gpota | 0:2529b7b37e9a | 114 | El=1;A=1;D=1;G=1;B=1;Eh=1;wait(0.2); |
gpota | 0:2529b7b37e9a | 115 | El=0;A=0;D=0;G=0;B=0;Eh=0; |
gpota | 0:2529b7b37e9a | 116 | Led_Down=1; |
gpota | 0:2529b7b37e9a | 117 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 118 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 119 | |
gpota | 0:2529b7b37e9a | 120 | |
gpota | 0:2529b7b37e9a | 121 | |
gpota | 0:2529b7b37e9a | 122 | int32_t i = 0; |
gpota | 0:2529b7b37e9a | 123 | pc.printf("\r\n\r\nFFT test program!\r\n"); |
gpota | 0:2529b7b37e9a | 124 | |
gpota | 0:2529b7b37e9a | 125 | |
gpota | 0:2529b7b37e9a | 126 | // Init arm_ccft_32 |
gpota | 0:2529b7b37e9a | 127 | switch (FFT_LEN) |
gpota | 0:2529b7b37e9a | 128 | { |
gpota | 0:2529b7b37e9a | 129 | case 16: |
gpota | 0:2529b7b37e9a | 130 | S = & arm_cfft_sR_f32_len16; |
gpota | 0:2529b7b37e9a | 131 | break; |
gpota | 0:2529b7b37e9a | 132 | case 32: |
gpota | 0:2529b7b37e9a | 133 | S = & arm_cfft_sR_f32_len32; |
gpota | 0:2529b7b37e9a | 134 | break; |
gpota | 0:2529b7b37e9a | 135 | case 64: |
gpota | 0:2529b7b37e9a | 136 | S = & arm_cfft_sR_f32_len64; |
gpota | 0:2529b7b37e9a | 137 | break; |
gpota | 0:2529b7b37e9a | 138 | case 128: |
gpota | 0:2529b7b37e9a | 139 | S = & arm_cfft_sR_f32_len128; |
gpota | 0:2529b7b37e9a | 140 | break; |
gpota | 0:2529b7b37e9a | 141 | case 256: |
gpota | 0:2529b7b37e9a | 142 | S = & arm_cfft_sR_f32_len256; |
gpota | 0:2529b7b37e9a | 143 | break; |
gpota | 0:2529b7b37e9a | 144 | case 512: |
gpota | 0:2529b7b37e9a | 145 | S = & arm_cfft_sR_f32_len512; |
gpota | 0:2529b7b37e9a | 146 | break; |
gpota | 0:2529b7b37e9a | 147 | case 1024: |
gpota | 0:2529b7b37e9a | 148 | S = & arm_cfft_sR_f32_len1024; |
gpota | 0:2529b7b37e9a | 149 | break; |
gpota | 0:2529b7b37e9a | 150 | case 2048: |
gpota | 0:2529b7b37e9a | 151 | S = & arm_cfft_sR_f32_len2048; |
gpota | 0:2529b7b37e9a | 152 | break; |
gpota | 0:2529b7b37e9a | 153 | case 4096: |
gpota | 0:2529b7b37e9a | 154 | S = & arm_cfft_sR_f32_len4096; |
gpota | 0:2529b7b37e9a | 155 | break; |
gpota | 0:2529b7b37e9a | 156 | } |
gpota | 0:2529b7b37e9a | 157 | while(1) { |
gpota | 0:2529b7b37e9a | 158 | button.rise(&selectNote); |
gpota | 0:2529b7b37e9a | 159 | for (int k = 0; k < 1024; k++) { |
gpota | 0:2529b7b37e9a | 160 | Ing[k] = (short) (analog_value.read_u16() - 0x8000); // read unsigned 16-bit and convert to signed 16-bit (subtract 32768) |
gpota | 0:2529b7b37e9a | 161 | wait_us(1e6/SAMP_FREQ); |
gpota | 0:2529b7b37e9a | 162 | } |
gpota | 0:2529b7b37e9a | 163 | //Riempiamo il vettore per la FFT |
gpota | 0:2529b7b37e9a | 164 | for(i = 0; i< FFT_LEN*2; i+=2) |
gpota | 0:2529b7b37e9a | 165 | { |
gpota | 0:2529b7b37e9a | 166 | |
gpota | 0:2529b7b37e9a | 167 | samples[i] = Ing[i]; |
gpota | 0:2529b7b37e9a | 168 | samples[i+1] = 0; |
gpota | 0:2529b7b37e9a | 169 | } |
gpota | 0:2529b7b37e9a | 170 | arm_cfft_f32(S, samples, 0, 1); |
gpota | 0:2529b7b37e9a | 171 | // Calculate magnitude of complex numbers output by the FFT. |
gpota | 0:2529b7b37e9a | 172 | arm_cmplx_mag_f32(samples, magnitudes, FFT_LEN); |
gpota | 0:2529b7b37e9a | 173 | |
gpota | 0:2529b7b37e9a | 174 | if(c==1){ |
gpota | 0:2529b7b37e9a | 175 | int max=3; |
gpota | 0:2529b7b37e9a | 176 | int j=2; |
gpota | 0:2529b7b37e9a | 177 | do{ |
gpota | 0:2529b7b37e9a | 178 | if (magnitudes[j]>magnitudes[max]&&(j*1000/1024<100)&&(j*1000/1024>30))//restringo la banda a [30Hz, 100Hz] |
gpota | 0:2529b7b37e9a | 179 | max=j; |
gpota | 0:2529b7b37e9a | 180 | j++; |
gpota | 0:2529b7b37e9a | 181 | |
gpota | 0:2529b7b37e9a | 182 | }while(j<1024/2); |
gpota | 0:2529b7b37e9a | 183 | |
gpota | 0:2529b7b37e9a | 184 | float maxx=(float)max*1000/1024; |
gpota | 0:2529b7b37e9a | 185 | //pc.printf("Il massimo in ampiezza è alla frequenza %f Hertz \n",(float)max*1000/1024); |
gpota | 0:2529b7b37e9a | 186 | if(maxx<82){ |
gpota | 0:2529b7b37e9a | 187 | Led_Down=1; |
gpota | 0:2529b7b37e9a | 188 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 189 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 190 | } |
gpota | 0:2529b7b37e9a | 191 | if(maxx>84){ |
gpota | 0:2529b7b37e9a | 192 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 193 | Led_Up=1; |
gpota | 0:2529b7b37e9a | 194 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 195 | } |
gpota | 0:2529b7b37e9a | 196 | else if(maxx>82.3 &&maxx<=84){ |
gpota | 0:2529b7b37e9a | 197 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 198 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 199 | Led_Ok=1; |
gpota | 0:2529b7b37e9a | 200 | } |
gpota | 0:2529b7b37e9a | 201 | } |
gpota | 0:2529b7b37e9a | 202 | //--------------A STRING------------------ |
gpota | 0:2529b7b37e9a | 203 | if(c==2){ |
gpota | 0:2529b7b37e9a | 204 | int max=3; |
gpota | 0:2529b7b37e9a | 205 | int j=2; |
gpota | 0:2529b7b37e9a | 206 | do{ |
gpota | 0:2529b7b37e9a | 207 | |
gpota | 0:2529b7b37e9a | 208 | if (magnitudes[j]>magnitudes[max]&&(j*1000/1024<130)&&(j*1000/1024>90))//restringo la banda a [90Hz, 130Hz] |
gpota | 0:2529b7b37e9a | 209 | max=j; |
gpota | 0:2529b7b37e9a | 210 | j++; |
gpota | 0:2529b7b37e9a | 211 | |
gpota | 0:2529b7b37e9a | 212 | }while(j<1024/2); |
gpota | 0:2529b7b37e9a | 213 | |
gpota | 0:2529b7b37e9a | 214 | float maxx=(float)max*1000/1024; |
gpota | 0:2529b7b37e9a | 215 | //pc.printf("Il massimo in ampiezza è alla frequenza %f Hertz \n",(float)max*1000/1024); |
gpota | 0:2529b7b37e9a | 216 | if(maxx<110){ |
gpota | 0:2529b7b37e9a | 217 | Led_Down=1; |
gpota | 0:2529b7b37e9a | 218 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 219 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 220 | } |
gpota | 0:2529b7b37e9a | 221 | if(maxx>112){ |
gpota | 0:2529b7b37e9a | 222 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 223 | Led_Up=1; |
gpota | 0:2529b7b37e9a | 224 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 225 | } |
gpota | 0:2529b7b37e9a | 226 | else if(maxx>110 &&maxx<113){ |
gpota | 0:2529b7b37e9a | 227 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 228 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 229 | Led_Ok=1; |
gpota | 0:2529b7b37e9a | 230 | } |
gpota | 0:2529b7b37e9a | 231 | } |
gpota | 0:2529b7b37e9a | 232 | //--------------D STRING------------------ |
gpota | 0:2529b7b37e9a | 233 | if(c==3){ |
gpota | 0:2529b7b37e9a | 234 | int max=3; |
gpota | 0:2529b7b37e9a | 235 | int j=2; |
gpota | 0:2529b7b37e9a | 236 | do{ |
gpota | 0:2529b7b37e9a | 237 | |
gpota | 0:2529b7b37e9a | 238 | if (magnitudes[j]>magnitudes[max]&&(j*1000/1024<160)&&(j*1000/1024>130))//restringo la banda a [90Hz, 130Hz] |
gpota | 0:2529b7b37e9a | 239 | max=j; |
gpota | 0:2529b7b37e9a | 240 | j++; |
gpota | 0:2529b7b37e9a | 241 | |
gpota | 0:2529b7b37e9a | 242 | }while(j<1024/2); |
gpota | 0:2529b7b37e9a | 243 | |
gpota | 0:2529b7b37e9a | 244 | float maxx=(float)max*1000/1024; |
gpota | 0:2529b7b37e9a | 245 | //pc.printf("Il massimo in ampiezza è alla frequenza %f Hertz \n",(float)max*1000/1024); |
gpota | 0:2529b7b37e9a | 246 | if(maxx<147){ |
gpota | 0:2529b7b37e9a | 247 | Led_Down=1; |
gpota | 0:2529b7b37e9a | 248 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 249 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 250 | } |
gpota | 0:2529b7b37e9a | 251 | if(maxx>149){ |
gpota | 0:2529b7b37e9a | 252 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 253 | Led_Up=1; |
gpota | 0:2529b7b37e9a | 254 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 255 | } |
gpota | 0:2529b7b37e9a | 256 | else if(maxx>147 &&maxx<149){ |
gpota | 0:2529b7b37e9a | 257 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 258 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 259 | Led_Ok=1; |
gpota | 0:2529b7b37e9a | 260 | } |
gpota | 0:2529b7b37e9a | 261 | } |
gpota | 0:2529b7b37e9a | 262 | //--------------G STRING------------------ |
gpota | 0:2529b7b37e9a | 263 | if(c==4){ |
gpota | 0:2529b7b37e9a | 264 | int max=3; |
gpota | 0:2529b7b37e9a | 265 | int j=2; |
gpota | 0:2529b7b37e9a | 266 | do{ |
gpota | 0:2529b7b37e9a | 267 | |
gpota | 0:2529b7b37e9a | 268 | if (magnitudes[j]>magnitudes[max]&&(j*1000/1024<210)&&(j*1000/1024>170))//restringo la banda a [90Hz, 130Hz] |
gpota | 0:2529b7b37e9a | 269 | max=j; |
gpota | 0:2529b7b37e9a | 270 | j++; |
gpota | 0:2529b7b37e9a | 271 | |
gpota | 0:2529b7b37e9a | 272 | }while(j<1024/2); |
gpota | 0:2529b7b37e9a | 273 | |
gpota | 0:2529b7b37e9a | 274 | float maxx=(float)max*1000/1024; |
gpota | 0:2529b7b37e9a | 275 | //pc.printf("Il massimo in ampiezza è alla frequenza %f Hertz \n",(float)max*1000/1024); |
gpota | 0:2529b7b37e9a | 276 | if(maxx<196){ |
gpota | 0:2529b7b37e9a | 277 | Led_Down=1; |
gpota | 0:2529b7b37e9a | 278 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 279 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 280 | } |
gpota | 0:2529b7b37e9a | 281 | if(maxx>203){ |
gpota | 0:2529b7b37e9a | 282 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 283 | Led_Up=1; |
gpota | 0:2529b7b37e9a | 284 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 285 | } |
gpota | 0:2529b7b37e9a | 286 | else if(maxx>=196 &&maxx<=197.5){ |
gpota | 0:2529b7b37e9a | 287 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 288 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 289 | Led_Ok=1; |
gpota | 0:2529b7b37e9a | 290 | } |
gpota | 0:2529b7b37e9a | 291 | } |
gpota | 0:2529b7b37e9a | 292 | //--------------B STRING------------------ |
gpota | 0:2529b7b37e9a | 293 | if(c==5){ |
gpota | 0:2529b7b37e9a | 294 | int max=3; |
gpota | 0:2529b7b37e9a | 295 | int j=2; |
gpota | 0:2529b7b37e9a | 296 | do{ |
gpota | 0:2529b7b37e9a | 297 | |
gpota | 0:2529b7b37e9a | 298 | if (magnitudes[j]>magnitudes[max]&&(j*1000/1024<260)&&(j*1000/1024>230))//restringo la banda a [90Hz, 130Hz] |
gpota | 0:2529b7b37e9a | 299 | max=j; |
gpota | 0:2529b7b37e9a | 300 | j++; |
gpota | 0:2529b7b37e9a | 301 | |
gpota | 0:2529b7b37e9a | 302 | }while(j<1024/2); |
gpota | 0:2529b7b37e9a | 303 | |
gpota | 0:2529b7b37e9a | 304 | float maxx=(float)max*1000/1024; |
gpota | 0:2529b7b37e9a | 305 | //pc.printf("Il massimo in ampiezza è alla frequenza %f Hertz \n",(float)max*1000/1024); |
gpota | 0:2529b7b37e9a | 306 | if(maxx<244){ |
gpota | 0:2529b7b37e9a | 307 | Led_Down=1; |
gpota | 0:2529b7b37e9a | 308 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 309 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 310 | } |
gpota | 0:2529b7b37e9a | 311 | if(maxx>250){ |
gpota | 0:2529b7b37e9a | 312 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 313 | Led_Up=1; |
gpota | 0:2529b7b37e9a | 314 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 315 | } |
gpota | 0:2529b7b37e9a | 316 | else if(maxx>246 &&maxx<250){ |
gpota | 0:2529b7b37e9a | 317 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 318 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 319 | Led_Ok=1; |
gpota | 0:2529b7b37e9a | 320 | } |
gpota | 0:2529b7b37e9a | 321 | } |
gpota | 0:2529b7b37e9a | 322 | //--------------Eh STRING------------------ |
gpota | 0:2529b7b37e9a | 323 | if(c==6){ |
gpota | 0:2529b7b37e9a | 324 | int max=3; |
gpota | 0:2529b7b37e9a | 325 | int j=2; |
gpota | 0:2529b7b37e9a | 326 | do{ |
gpota | 0:2529b7b37e9a | 327 | |
gpota | 0:2529b7b37e9a | 328 | if (magnitudes[j]>magnitudes[max]&&(j*1000/1024<340)&&(j*1000/1024>310))//restringo la banda a [90Hz, 130Hz] |
gpota | 0:2529b7b37e9a | 329 | max=j; |
gpota | 0:2529b7b37e9a | 330 | j++; |
gpota | 0:2529b7b37e9a | 331 | |
gpota | 0:2529b7b37e9a | 332 | }while(j<1024/2); |
gpota | 0:2529b7b37e9a | 333 | |
gpota | 0:2529b7b37e9a | 334 | float maxx=(float)max*1000/1024; |
gpota | 0:2529b7b37e9a | 335 | //pc.printf("Il massimo in ampiezza è alla frequenza %f Hertz \n",(float)max*1000/1024); |
gpota | 0:2529b7b37e9a | 336 | if(maxx<327){ |
gpota | 0:2529b7b37e9a | 337 | Led_Down=1; |
gpota | 0:2529b7b37e9a | 338 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 339 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 340 | } |
gpota | 0:2529b7b37e9a | 341 | if(maxx>334){ |
gpota | 0:2529b7b37e9a | 342 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 343 | Led_Up=1; |
gpota | 0:2529b7b37e9a | 344 | Led_Ok=0; |
gpota | 0:2529b7b37e9a | 345 | } |
gpota | 0:2529b7b37e9a | 346 | else if(maxx>330.3 &&maxx<333.5){ |
gpota | 0:2529b7b37e9a | 347 | Led_Down=0; |
gpota | 0:2529b7b37e9a | 348 | Led_Up=0; |
gpota | 0:2529b7b37e9a | 349 | Led_Ok=1; |
gpota | 0:2529b7b37e9a | 350 | } |
gpota | 0:2529b7b37e9a | 351 | } |
gpota | 0:2529b7b37e9a | 352 | |
gpota | 0:2529b7b37e9a | 353 | |
gpota | 0:2529b7b37e9a | 354 | } |
gpota | 0:2529b7b37e9a | 355 | } |
gpota | 0:2529b7b37e9a | 356 |