SX28AC with the LAIPAC TRW-24G

r_noble

i was wondering if anyone can tell me what wrong with my code, i.e if they have had experience working with these transceivers.


'RX MODULE
==============DEVICE=SETTINGS==============================
·DEVICE·SX28, TURBO, OSCHS
·ID·RFv1a
·IRC_CAL·IRC_SLOW
·FREQ·20_000_000·'20MHz
'

---

'·Interface pin assignments
'

---

PORTA

---

DATA_··var·ra.2
CLK1··var·ra.3
'

---

PORTB

---

DR1··var·rb.0
CS··var·rb.1
CE··var·rb.2
'

---

PORTC

---

DAConv··var·rc
'

---

'·Variables
RcvDta··var·byte··························· 'byte to store recieved data
idx··var·byte································· 'table index
rfcon··var·byte·······························'byte used for configuration
txsend··var·byte···························· 'stores address bytes of destination module
TXdata··var·byte

'

---

'·Subroutine
Rx_Setup·sub·0
Rx_Mode··sub·0
'

---

program start

start:
·tris_a ·= %1100···························· ·'pin 3 input all others are outputs
·tris_b ·= %01110001
·tris_c ·= $00································· 'Port C pins all output
·rc ·= $0
·low·CE
·low·CS

·pause·3
'

---

Main:
·goto·Rx_Setup

·goto ·main
'===============RECEIVE=MODE=CONFIGURATION=================================
Rx_Setup:
·tris_b·= %01110001
·low·CE
·high·CS
·pauseus·5··································· ·'Tcs2data = 5 microsecond delay
·pauseus·0.5················ ··············· ·'Ts = 500 nanosecond delay
·idx = 0
·do

Lookup·idx,$8e,$08,$1c,$08,$08,$ff,$ff,$ff,$ff,$ff,$19,$28,$37,$46,$55,$a3,$53,$21,rfcon
·low·CLK1···································· ·'starts the the clock from the
·················································· 'idle position of 0

·shiftout DATA_,CLK1,MSBFIRST,rfcon\8,11··'Baudrate ~ 1Mbps
·inc·idx
·loop until idx = 17
·low·CS

·low·DATA_
·goto·Rx_Mode

'===============RECEIVE=MODE=SUBROUTINE=================================
Rx_Mode:
·if DR1 = 0 then Rx_Mode·'tests for available data
·low·CLK1
·high ·CE

·shiftin·DATA_,CLK1,MSBPOST,RcvDta
·low ·CE
·DAConv·= RcvDta
·goto·Rx_Mode


'TX MODULE

'===============DEVICE=SETTINGS==============================
·DEVICE·SX28, TURBO, OSCHS
·ID·RFv1a
·IRC_CAL·IRC_SLOW
·FREQ·20_000_000·'20MHz
'

---

'·Interface pin assignments
'

---

PORTA

---

DATA_··var·ra.2
CLK1··var·ra.3
'

---

PORTB

---

DR1··var·rb.0
CS··var·rb.1
CE··var·rb.2
'

---

PORTC

---

DAConv··var·rc
'

---

'·Variables
idx··var·byte··············· ·'table index
rfcon··var·byte············· 'byte used for configuration
txsend··var·byte··········· 'stores address bytes of destination module
adcVal········· var·byte··· 'byte to be sent
TXdata··var·byte

'

---

'·Subroutine
Tx_Setup·sub·0
Tx_Mode··sub·0
'

---

program start

start:
·tris_a ·= %1100···················· 'pin 3 input all others are outputs
·tris_b ·= %01110001
·tris_c ·= $00························ 'Port C pins all output
·rc ·= $0
·low·CE
·low·CS
·pause·3
Main:
·goto·Tx_Setup

·goto ·main

'===============TRANSMIT=MODE=CONFIGURATION===============================
Tx_Setup:
·low·rc
·tris_b·= %01110001
·low·CE
·high·CS
·pauseus·5····························· ·'Tcs2data = 5 microsecond delay
·pauseus·0.5··························· 'Ts = 500 nanosecond delay
·idx = 0
·do········································ 'this sends out the 18 configuration bytes to
············································ 'RF transceiver

Lookup·idx,$8e,$08,$1c,$08,$08,$ff,$ff,$ff,$ff,$ff,$0a,$19,$28,$37,$46,$a3,$53,$20,rfcon
·low·CLK1
·shiftout DATA_,CLK1,MSBFIRST,rfcon\8,11·'Baudrate ~ 1Mbps
·inc·idx
·loop until idx = 17
·low·CS
·goto·Tx_Mode
'===============TRANSMIT=MODE=SUBROUTINE================================
·adcVal = %10101010

Tx_Mode:
·do

·high·CE
·pauseus·5
·pauseus 0.5
·idx = 0
·do
·Lookup ·idx,$19,$28,$37,$46,$55,adcval,txsend
·low·CLK1
·shiftout DATA_,CLK1,MSBFIRST,rfcon\8,11·'Baudrate ~ 1Mbps
·inc·idx
·loop until idx = 5
·low ·CE
·pauseus·5
·goto·Tx_Mode



Post Edited (r_noble) : 9/28/2006 1:36:32 PM GMT

Bean

r_noble said...
i was wondering if anyone can tell me what wrong with my code, i.e if they have had experience working with these transceivers.

You're going to have to give us some clues...
What is wrong with the code ?

Bean.



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r_noble

For some reason I am not getting the receiver to send out put anything to the sx28. On the oscilloscope I can see the sx sending data on the transmitting end but I am not seeing any activity at the receiving end. so I am wondering if the chips are dead or if the shiftout and shiftin code is initialize incorrectly.

VCC = 3.36 V
The code is supposed to send 10101010 to the other and output it to LEDs at port c.
It will lated be added to adc and dac modules for audio transmission

Post Edited (r_noble) : 9/28/2006 3:32:47 PM GMT