Yoichi Nagashima
/
CQ_nagasm_05_detection
NucleoF401RE A/D Envelope detection with Moving average, transfer via XBww
main.cpp
- Committer:
- nagasm
- Date:
- 2014-12-09
- Revision:
- 0:14c6afea35c7
File content as of revision 0:14c6afea35c7:
#include "mbed.h" #include "sub.hpp" float mean_sum, ad_data[201]; int average_mode, max_count, ad_pointer[5]; void sum_clear(){ int i; for (i=0; i<5; i++) ad_pointer[i] = 0; for (i=0; i<201; i++) ad_data[i] = 0; mean_sum = 0; } float move_mean_calc(float data){ mean_sum = mean_sum - ad_data[ad_pointer[0]] + data; ad_data[ad_pointer[0]] = data; ad_pointer[0]++; if(ad_pointer[0] == max_count) ad_pointer[0] = 0; return(mean_sum / (float)max_count); } int main(){ int i, detection, sum, gain; i = 0; detection = 0; gain = 1; average_mode = 0; for (i=0; i<5; i++) timer_value[i] = 0; sum_clear(); xbee.baud(38400); xbee.attach(&rx_fifoset, xbee.RxIrq); timer_setup.attach_us(&timer_interrupt, 50); // 50usec while(1){ if(timer_value[2] > 99){ // 5msec timer_value[2] = 0; float data = (float)gain * (analog_value3.read() - 0.5f); if(detection == 1){ if (data < 0) data = -data; } if(average_mode != 0) data = move_mean_calc(data); tx_message((uint16_t)((data + 1.0f) * 2047)<<4); } if(timer_value[0] > 9999){ // 500msec timer_value[0] = 0; myled = !myled; } tx_fifo_check(); if(rx_fifo_check() == 1){ sum = 0; for (i=0; i<6; i++) sum += conv_hex(raw_data[i])<<(4*(5-i)); tx_message(sum); /* Echo Back */ if(sum>>16 == 0x80){ switch((sum & 0xff00)>>8){ case 0x00: detection = sum & 0x01; break; case 0x01: gain = sum & 0x0f; break; case 0x02: average_mode = sum & 0x07; max_count = 5; switch(average_mode){ case(2): max_count = 10; break; case(3): max_count = 20; break; case(4): max_count = 50; break; case(5): max_count = 100; break; case(6): max_count = 200; break; } sum_clear(); break; } } } } }