enabled FFT. But somehow it makes random-looking result. My next step -- flush twiddles to the PC and check them

src/l502_stream.c

@@ -32,8 +32,11 @@
 
 
 #define FFT_FP_EXTERNAL_TWIDDLES
+
 #define DATA_L (1<<10)
 #define TWIDDLE_L (DATA_L / 2)
+
+
 #include "FFT_FP_realisation.h"
 volatile int64_t twiddle_re[TWIDDLE_L] __attribute__((section(".sdram_noinit")));
 volatile int64_t twiddle_im[TWIDDLE_L] __attribute__((section(".sdram_noinit")));

src/l502_user_process.c

@@ -150,9 +150,17 @@ uint32_t dataprocessor(uint32_t* AVG_buff, uint32_t AVG_buff_I_max, uint64_t* FF
 			FFT_buff[FFT_buff_I++] = AVG_buff[i++];
 		}
 	}else if (mode == FFT){
-		uint32_t i = 0;
+		//uint32_t i = 0;
 		//void FFT_fp(int64_t* inp, uint32_t inp_L, int64_t* buf)
 		FFT_fp(AVG_buff, FFT_INP_DATA_L, FFT_buff);
+
+/*	}else if (mode == FLUSH_TWIDDLES){
+		uint32_t i = 0;
+		while ((FFT_buff_I < FFT_BUFF_SIZE) && (i < TWIDDLE_L)){
+			FFT_buff[FFT_buff_I++] = twiddle_re[i++];
+		}
+
+*/
 	}
 
 	return FFT_buff_I;
@@ -268,7 +276,8 @@ uint32_t usr_in_proc_data(uint32_t* data, uint32_t size) {
 					    	FFT_buff[i] = 0;
 					    }
 
-					    uint32_t FFT_res_size = dataprocessor(AVG_buff, Proc_state.AVG_buff_I_last, FFT_buff, TRANSPARENT);
+					    uint32_t FFT_res_size = dataprocessor(AVG_buff, Proc_state.AVG_buff_I_last, FFT_buff, FFT);
+//					    uint32_t FFT_res_size = dataprocessor(AVG_buff, Proc_state.AVG_buff_I_last, FFT_buff, TRANSPARENT);
 
 
 
@@ -333,7 +342,7 @@ uint32_t usr_in_proc_data(uint32_t* data, uint32_t size) {
 					}
 				}
 			}else{
-				AVG_buff[Proc_state.AVG_buff_I] = 0xC1000000;
+				//AVG_buff[Proc_state.AVG_buff_I] = 0xC1000000;
 				Proc_state.AVG_buff_I_last = Proc_state.AVG_buff_I;
 				Proc_state.AVG_buff_I++;
 				if (Proc_state.AVG_buff_I >= AVG_BUFF_SIZE){

src/l502_user_process.h

@@ -12,6 +12,10 @@
 #define FFT_INP_DATA_L (1<<10)
 
 
+//#define FFT_FP_EXTERNAL_TWIDDLES
+//#define DATA_L (1<<10)
+//#define TWIDDLE_L (DATA_L / 2)
+
 //#define TX_BUFF_SIZE 100000
 #define RAW_DATA_BUFF_SIZE 1000
 #define AVG_BUFF_SIZE FFT_INP_DATA_L
@@ -68,6 +72,7 @@ enum dataprocessor_state {
 	FFT,
 	FFT_DONE,
 	WORK,
+	FLUSH_TWIDDLES,
 };
 
 /*

src/main.c

@@ -14,15 +14,21 @@ void stream_proc(void);
  * Для расположения в начало банка A данных используем специальную секцию */
 SECTION("board_state", volatile t_l502_board_state g_state);
 
+uint8_t twiddles_generated = 0;
+
 
 int main(void) {
     /* Инициализация интерфейсов */
     l502_init();
-    fft_twiddle_gen(twiddle_re, twiddle_im);
+
     for (;;) {
         /* проверяем наличие команды от ПК и начинаяем
            обработку, если она есть */
         l502_cmd_check_req();
+        if (! twiddles_generated){
+        	fft_twiddle_gen(twiddle_re, twiddle_im);
+        	twiddles_generated = 1;
+        }
         /* обработка потоков данных */
         stream_proc();
     }