succesfully loading firmware to BF and executing command L502_BF_CMD_CODE_GET_PARAM (aka f_cmd_get_param), with parameter and receiving data. This BF function was modified to reply hardcoded 44527 at param 87. Other params are working too

main.c

@@ -84,6 +84,9 @@
 #define READ_TIMEOUT     2000
 
 
+#define BF_CMD_USER_MULT 0x8001U
+
+
 // номера используемых физических каналов //
 static uint32_t f_channels[ADC_LCH_CNT] = {0};
 // режимы измерения для каналов //
@@ -297,14 +300,21 @@ int32_t f_setup_params(t_x502_hnd hnd) {
 //    }
     
     
-    X502_SetSyncMode(hnd, X502_SYNC_DI_SYN1_FALL); 
     
       //set ADC sample frequency from internal generator with frequency 2 MHz
     //X502_SetRefFreq(hnd, X502_REF_FREQ_2000KHZ);
 
+    //=======================================================//
+    //for real work with Radar
+    //X502_SetSyncMode(hnd, X502_SYNC_DI_SYN1_FALL);
+    //X502_SetSyncStartMode(hnd, X502_SYNC_DI_SYN2_RISE); //start ADC samping by external trigger
 
-    X502_SetSyncStartMode(hnd, X502_SYNC_DI_SYN2_RISE); //start ADC samping by external trigger
     
+    //=======================================================//
+    //for debug purposes:
+    X502_SetSyncMode(hnd, X502_SYNC_INTERNAL);
+    X502_SetSyncStartMode(hnd, X502_SYNC_INTERNAL); //start ADC samping after executing X502_StreamsStart()
+
     
     
 
@@ -383,7 +393,75 @@ int main(int argc, char** argv) {
                 fprintf(stderr, "Ошибка настройки модуля: %s!", X502_GetErrorString(err));
         }
         
+        char* BF_firmware_filename = "l502-BFfirmware0.ldr";
         
+        printf("loading Blackfin firmware file: %s\n", BF_firmware_filename);
+
+        uint32_t bf_firmware_load_state = X502_BfLoadFirmware(hnd, BF_firmware_filename); //load firmware from l502-BFfirmware0.ldr file to BlackFin
+        printf("load state: %u \n", bf_firmware_load_state);
+
+
+        uint32_t BF_cmd_receive_code = 0;
+
+        uint16_t cmd_code = 3;
+        uint32_t par = 87;
+        const uint32_t snd_data[] = {1,1,2,2,3,4,5,56,67,23,1};
+        uint32_t snd_size = 11;
+        uint32_t rcv_data[13] = {0,};
+        uint32_t rcv_size = 13;
+        uint32_t tout = 1;
+        uint32_t recvd_size = 0;
+
+
+/*
+        uint16_t cmd_code = BF_CMD_USER_MULT;
+        uint32_t par = 10;
+        const uint32_t snd_data[] = {1,1,2,2,3,4,5,56,67,23,1};
+        uint32_t snd_size = 11;
+        uint32_t rcv_data[13] = {0,};
+        uint32_t rcv_size = 13;
+        uint32_t tout = 1;
+        uint32_t recvd_size = 0;
+*/
+
+
+        printf("TX cmd_code: %u\n", cmd_code);
+        printf("TX tout: %u\n", tout);
+        printf("TX par: %u\n", par);
+        printf("TX snd_data size: %u\n", snd_size);
+        for (int i = 0; i < snd_size; ++i){
+        	printf(" %u,", snd_data[i]);
+        }
+        printf("\n");
+        printf("TX rcv_size: %u\n", rcv_size);
+
+
+        BF_cmd_receive_code =  X502_BfExecCmd (hnd,
+        										cmd_code,
+												par,
+												snd_data,
+												snd_size,
+												rcv_data,
+												rcv_size,
+												tout,
+												&recvd_size);
+
+
+        printf("\n======================\n\n");
+        printf("RX received code: %u\n", BF_cmd_receive_code);
+        printf("RX recvd_size: %u\n", recvd_size);
+        printf("RX received_data:\n" );
+        for (int i = 0; i < recvd_size; ++i){
+           	printf(" %u,", rcv_data[i]);
+        }
+        printf("\n");
+
+        
+        X502_Close(hnd);
+        // освобождаем описатель
+        X502_Free(hnd);
+        return 0;
+
         
 
 
@@ -395,12 +473,13 @@ int main(int argc, char** argv) {
 //        }
 
 
-	f_out = 2;
+	f_out = 1;
 	struct timespec time_started;
     struct timespec time_ended;
 	timespec_get(&time_started, TIME_UTC);
 	float total_runs = 0.0;
 	long double delta_time = 0.0;
+	
 	while(f_out != 1){
         total_runs += 1.0;
 

makefile

@@ -46,3 +46,5 @@ endif
 
 all:
 	$(CC) main.c $(FLAGS) -ll502api -le502api -lx502api -o BF_companion
+clean:
+	-rm BF_companion