IGEP
TM
RADAR SENSOR ORION Hardware Reference Manual
ISEE 2007
S.L. All rights reserved, IGEP™ is a registered trademark from ISEE 2007 S.L. The following is provided for informational purposes only.
DOCUMENT FROM ISEE 2007 S.L. Ref: MAN-PR-RADR0010-RA1-001
16
5.6.4
DDS MODULATION PROGRAMMING:
FSTART[hexa]=
TUVXYZ (Example: 3C1234)
SECOND WORD:
C
XYZ
(Example: C234)
THIRD WORD:
D
TUV
(Example: D3C1)
STEP[hexa]=
QRS
(Example: 567)
FOURTH WORD:
2
QRS
(Example: 2567)
FIFTH WORD:
3000
NINC[hexa]=
NOP (Example: 89A)
SIXTH WORD:
1
NOP
(Example: 189A)
SLOPE[hexa]=
KLM (Example: 7CD)
SEVENTH WORD:
6
KLM
(Example: 67CD)
SPI programming must follow this 7 word format, each word made of 4 hexadecimal values:
GHIJ CXYZ DTUV 2QRS 3000 1NOP 6KLM
in the example:
0B8F C234 D3C1 2567 3000 189A 67CD
At each falling edge of FSYNC, it is sent by SDATA line a 16bit frame (4 value hexadecimal
word), starting by the most significant bit. Each data bit is sampled at each SCLK falling edge.
5.6.5
DDS SPI PHYSICAL INTERFACE
DDS MODULATOR can be programmed through SPI interface available either on JC2 or JC3
connectors.
When EXPANSION-II (JC2 CONNECTOR) is used, the SPI ports are:
Signal Name
Mode 0 Name
Pin #
Description
2DDS DAT
mcbsp1_dx
JC2:12
DDS DATA (mode1: mcspi4_simo) IN
2DDS CS
mcbsp1_clkx
JC2:14
DDS Chip Select (mode4: gpio_162) IN
2ADCDDS CK
mcbsp1_clkr
JC2:20
ADC&DDS CLOCK (mode1: mcspi4_clk) IN
Table 9 : DDS SPI-4 INTERFACE on JC2 connector
If you use IGEP
™
v2 Processor board these ports correspond to
SPI-4
of OMAP processor, when
configured as shown on column “Description”.
