transmit update

SoapyRadioberrySettings.cpp

@@ -217,10 +217,10 @@ void SoapyRadioberry::setGain( const int direction, const size_t channel, const
 	{ // 0 -7 TX RF gain 
 
 		int v = (int)value;
-		if (v > 16) v = 16;
+		if (v > 15) v = 15;
 		if (v < 0) v = 0;
 		v = v << 28;
-		command = 0x15; 
+		command = 0x13; 
 		command_data = v; 
 	}
 

SoapyRadioberryStreaming.cpp

@@ -155,21 +155,20 @@ int SoapyRadioberry::writeStream(SoapySDR::Stream *stream, const void * const *b
 
 	char tx_buffer[4];
 
-	for (int ii = 0; ii < numElems * 2; ii++)
+	for (int ii = 0; ii < numElems; ii++)
 	{
-		float f;
-		int	d;
-		f = target_buffer[iq];
-		if (iq % 2)
-		{
-			f =  -1.0 * f;
-		}
-		iq++;
-		d = f * 2048.0;
-		tx_buffer[0] = 0;
-		tx_buffer[1] = (d & 0xFF0000) >> 16;
-		tx_buffer[2] = (d & 0xFF00) >> 8;
-		tx_buffer[3] = (d & 0xFF);
+		float		i, q;
+		uint16_t	di, dq;
+
+		di = target_buffer[iq++] * 32767.999f;
+		dq = target_buffer[iq++] * 32767.999f;
+		// i
+		tx_buffer[0] = (di & 0xFF00) >> 8;
+		tx_buffer[1] = (di & 0x00FF);
+		// q
+		tx_buffer[2] = (dq & 0xFF00) >> 8;
+		tx_buffer[3] = (dq & 0x00FF);
+
 		// wrtie 4 bytes 1 sample per write
 		ret = write(fd_rb, tx_buffer, sizeof(tx_buffer));
 		if (ret == 0)