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- /*
- * Copyright 2017 <Admobilize>
- * All rights reserved.
- */
- #include <gflags/gflags.h>
- #include <wiringPi.h>
- #include <math.h>
- #include <fstream>
- #include <iostream>
- #include <string>
- #include <thread>
- #include <valarray>
- #include "../cpp/driver/everloop.h"
- #include "../cpp/driver/everloop_image.h"
- #include "../cpp/driver/microphone_array.h"
- #include "../cpp/driver/wishbone_bus.h"
- DEFINE_int32(sampling_frequency, 44100, "Sampling Frequency");
- DEFINE_int32(duration, 1, "Interrupt after N seconds");
- namespace hal = matrix_hal;
- int main(int argc, char *agrv[]) {
- google::ParseCommandLineFlags(&argc, &agrv, true);
- hal::WishboneBus bus;
- bus.SpiInit();
- int sampling_rate = FLAGS_sampling_frequency;
- int seconds_to_record = FLAGS_duration;
- std::cout << "Duration : " << seconds_to_record << "s" << std::endl;
- std::thread et(
- [seconds_to_record, sampling_rate](hal::WishboneBus *bus) {
- std::ifstream is("/home/pi/song.raw");
- int delta, t;
- int l = 1024;
- uint16_t test[l];
- float fs = float(sampling_rate);
- float ts = 1.0 / fs;
- float f = 1000;
- float w = 2 * M_PI * f;
- float A = (pow(2, 16)) - 1;
- t=0;
- while (true) {
- delta = (t) * l;
- // for (int i = 0; i < l; i++) {
- // test[i] = uint16_t(A/2 + A*sin(w*(delta+i)*ts)/128);
- // }
- is.read((char *)test,l*2);
- uint16_t write_pointer;
- uint16_t read_pointer;
- uint16_t diff;
- bus->SpiRead16(0x6802,(unsigned char*)&read_pointer);
- bus->SpiRead16(0x6803,(unsigned char*)&write_pointer);
- if(write_pointer > read_pointer)
- diff = write_pointer - read_pointer;
- else
- diff = 4096 - read_pointer + write_pointer;
- if(diff > 3072){
- int sleep = int(l*ts*1000000);
- std::this_thread::sleep_for(std::chrono::microseconds(sleep));
- }
- bus->SpiWriteBurst(0x6000,
- reinterpret_cast<unsigned char *>(&test[0]),
- sizeof(uint16_t) * l);
- t++;
- }
- },
- &bus);
- et.join();
- return 0;
- }
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