RFbeam Microwave GmbH

RSP1 Radar Processor

Datasheet

7.5 Serial Debug Interface

Debug interface provides highspeed parameter access as well as streaming output of I and Q signals

and FFT results signals over a serial UART interface.

This is a 3.3V asynchronous UART interface:

Pins:

Input: DEBUG_RX, output DEBUG TX

Physical data: 460'800Baud (parameter S0B), 8 databit, 1 stopbit, no parity, no handshake.

Protocols:

- Streaming protocol,

supported by RSP_Scope tool. (see chapters below)

- Client-server protocol supported by RSP_Scope and RSP_Terminal tool

- Bootloader protocol.

Proprietary, for use with RSP_PROG tool

7.5.1 Cyclic Signal Streaming

Cyclic signal streaming is a continuous data stream with no host intervention except start and stop.

This mode is initiated by commands D0001 and D0002 the Host Command Interface .

RSP1 then outputs cyclic binary data frames on Debug Interface.

Cyclic output stops at command D000.

Protocol Item

Binary data items on line DEBUG_TX

Format

Comment

Sync Header

0x24, 0x02, 0xa2, 0xe1, 0x5a, 0xd6, 0x19

7 Bytes

Mode Byte

0x7a or 0x7f

1 Byte

D00x1 or D00x2

1024 or 2048 bytes

for "Scope" display

FFT spectrum

bin -128

bin -127

…..

bin 127

High, Low Byte

Data Byte 0, 1

Note 1)

.

.

Data Byte 254, 255

Threshold

bin -128

bin -127

…..

bin 127

High, Low Byte

Data Byte 256, 257

Note 1)

.

.

Data Byte 510, 511

I signal

sample 0

sample 1

….

sample 255

High, Low Byte

Data Byte 512, 767

Note 2)

Data Bytes 766, 767

Q signal

sample 0

sample 1

….

sample 255

High, Low Byte

Data Bytes 768, 769

Note 2)

Data Bytes 1022, 1023

2 data bytes

strongest object

speeds

Forward frequency peak index 0 to 127

1 Byte

0: no peak, >0 speed

Backward frequency peak index 0 to 127

1 Byte

0: no peak, >0 speed

Table 5: Debug cyclic and single shot protocol

Note 1): FFT and Threshold values are unsigned integers, ranging from 0 to 437. These are logarithmic magnitude values

from 0 to 43.7. --> 0 ... 4.37. See chapter 5.4 Internal signal representation for more details on conversions.

Note 2): Present only at commands D0002 and D012.

Streamed I/Q signals are for display and debug purposes because signals may not be continuous.

I/Q Signals come as 16 bit signed interger format (2th complement) and left shifted by 4 bits.

Example: sent 0x0120 must be interpreted: 0x012 (i.e. divide received value by 16).

7.5.2 Single Shot Signal Streaming (recommended)

Single shot streaming is a client server protocol.

This mode is initiated by commands D0011 and D0012 at the Debug or Host Command Interface.

RSP1 then outputs one binary data frame on Debug Interface.

Data frame is the same as in the cyclic protocol described before.

© RFbeam Microwave GmbH www.rfbeam.ch

December 11, 2015

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