TI CC1101 Radio Project

[andybarrett1]

I found this whilst looking for someting else.....

Maybe of use ? :

http://www.squirrel-labs-files.co.uk...z-RF1100SE.zip

BR
Andy

[Zebryk]

Thanks Andy,

Quite interesting but vast.
Can you share any background?

[andybarrett1]

Hi

Sorry I haven't used the radio .... I was looking for something else and remembered your post here....So posted link!

BR
Andy

[LinkMTech]

I used the 900MHz Anaren radio module that uses that chip and what a mental workout, but got it working.
I found an article in Nutsvolts that helped me structure the sequence of events in order to get it working right. The code is in C+ but was able to decipher what to do.

Attached is a copy of the article.

Texas Instruments SmartRF Studio also helped with more insight. It provides all the info on every parameter that sucker uses.

Let me know if this is relevant and need some sample code. I used it with a PIC16F685 and PBP 2.5 or so back then.

[ecoli-557]

LinkMTech-
I was trying to use Microchip's 900MHz radio, but it whipped me - never got it to work (posted elsewhere on this forum) and now am looking for another radio.
Would you post what you did so I can get a head start on this? I just want to xmit 3 byte packet...... The idea is a 1 to many design.
Thanks in advance,
Steve

[LinkMTech]

Sure!
The A1101R09A module allows you to TX/RX data straight through using one of the GDO pins or using the SPI buffer depending on configuration. I found that using the SPI mode had better bandwidth efficiency with higher throughput.

I never finished upgrading to its full potential because there's still a lot thats over my head but have plenty of code to get you started.
I'll go through my files and dig up where I left off.

[LinkMTech]

Okay, I found the test code for the demo.
It's old code probably using PBP2.5 so you'll need to adjust to your flavoring.

I used this to just test the transmitter but it can be configured for RX too.

'****************************************************************
'*  Name    : Anaren Air Module.PBP
'*  Date    : 10/30/2010
'*  Version : PIC12F683 on protoPCB, 1.0
'*  Notes   : This routine uses DEBUGIN from PC to send SPI data to control
'*  the Anaren Transceiver Module A1101R09*. The idea is to first load all
'*  pertinent information to configure the module then using DEBUGIN to
'*  control the transmitter ON/OFF, mod or w/o mod, baud rate and PA level.
'*  
'****************************************************************
@ __config _INTRC_OSC_NOCLKOUT & _WDT_OFF & _MCLRE_OFF & _CP_OFF
OSCCON = %01110001  ' Osc 8Mhz
ANSEL = %00000000	  ' A/D turned OFF
ADCON0 = %10000000  ' Right justified and OFF
CMCON0 = 7		      ' Analog comparators off
GPIO = %00001001    ' 
TRISIO = %00001001  ' 

DEFINE OSC 8
INCLUDE "modedefs.bas"

' DEBUG Defines for Transmitter
DEFINE DEBUG_REG GPIO   
DEFINE DEBUG_BIT 1      ' GPIO 1 Pin#6
DEFINE DEBUG_BAUD 19200
DEFINE DEBUG_MODE 1 ' 1 = inverted, 0 = true

' DEBUG Defines for Receiver
DEFINE DEBUGIN_REG GPIO
DEFINE DEBUGIN_BIT 3    ' GPIO 3 Pin#4
DEFINE DEBUGIN_BAUD 19200
DEFINE DEBUGIN_MODE 1 ' 1 = inverted, 0 = true


' Alias pin assignments 
SCLK VAR GPIO.4         ' SPI bus clock on Pin#3      
MOSI VAR GPIO.5         ' SPI bus data to device on Pin#2
MISO VAR GPIO.0         ' SPI bus data from module on Pin#7  
_CSN VAR GPIO.2         ' SPI bus select on Pin#5

' Alias SPI variables
Address VAR BYTE
Add VAR BYTE
mode var BYTE
register VAR BYTE
cnt VAR BYTE
value VAR BYTE 

' Setup outputs
_CSN = 1               ' S_SEL set to idle HIGH
Add = $0
Value = 0
mode = $0

PAUSE 500

'/////////////////////////////////////////////////////////////////////////
'                       Register setup
' This routine loads all the register values derived from the TI Smart RF
' calculations. Load all mode values here. Takes 19.6ms to load
' Highlights: (08:$32, Async transparent mode), (0A:$48, CH#72, 916.396MHz)
' (15:$43, Dev = 39KHz)
'/////////////////////////////////////////////////////////////////////////
    FOR Address = 0 to $2E
        SELECT CASE Address
        CASE 0: mode = $0B : CASE 1: mode = $2E : CASE 2: mode = $0C
        
        CASE 3: mode = $47 : CASE 4: mode = $D3 : CASE 5: mode = $91
        
        CASE 6: mode = $3D : CASE 7: mode = $04 : CASE 8: mode = $22
        
        CASE 9: mode = $00 : CASE $0A: mode = $48 : CASE $0B: mode = $08
        
        CASE $0C: mode = $00 : CASE $0D: mode = $22 : CASE $0E: mode = $B1
        
        CASE $0F: mode = $3B : CASE $10: mode = $CA : CASE $11: mode = $83
        
        CASE $12: mode = $90 : CASE $13: mode = $22 : CASE $14: mode = $F8
        
        CASE $15: mode = $43 : CASE $16: mode = $07 : CASE $17: mode = $30
               
        CASE $18: mode = $18 : CASE $19: mode = $16 : CASE $1A: mode = $6C
        
        CASE $1B: mode = $43 : CASE $1C: mode = $40 : CASE $1D: mode = $91
        
        CASE $1E: mode = $87 : CASE $1F: mode = $6B : CASE $20: mode = $F8
        
        CASE $21: mode = $56 : CASE $22: mode = $10 : CASE $23: mode = $E9
        
        CASE $24: mode = $2A : CASE $25: mode = $00 : CASE $26: mode = $1F
        
        CASE $27: mode = $41 : CASE $28: mode = $00 : CASE $29: mode = $59
        
        CASE $2A: mode = $7F : CASE $2B: mode = $3F : CASE $2C: mode = $81
        
        CASE $2D: mode = $35 : CASE $2E: mode = $09
        
        END SELECT
        
        _CSN = 0               ' Enable Select bit
    GOSUB chip_status      ' Allow data transfer when device ready
        SHIFTOUT MOSI,SCLK,1,[Address,mode] 
        _CSN = 1               ' Disable Select bit        
    NEXT Address
' Additional setups
        _CSN = 0               ' Enable Select bit
        GOSUB chip_status      ' Allow data transfer when device ready
        SHIFTOUT MOSI,SCLK,1,[$7E,$8E] ' Set PA output to 0dBm
        SHIFTOUT MOSI,SCLK,1,[$33]  ' Calibrate synthesizer then turn OFF 
        _CSN = 1               ' Disable Select bit        
    
'/////////////////////////////////////////////////////////////////////////
'                       Main test program loop
' Use DEBUG to monitor on Realterm set to Port 4 and 19200,8,1,N on laptop
' USB port nearest DVD player.
' Command type examples:    
'   Turn ON TX:         0 53 0
'   Turn OFF TX:        0 54 0
'   Change CH#:         4 n 0       ' n=CH# 0~130
'   Change mod type:    1 16 202    ' 38.4KB 1st entry
'                       1 17 131    ' 38.4KB 2nd entry
'
'   Change PA level:    1 126 3      ' -30dBm
'                       1 126 14     ' -20dBm
'                       1 126 30     ' -15dBm
'                       1 126 39     ' -10dBm
'                       1 126 142    '  0dBm
'                       1 126 205    ' +5dBm
'                       1 126 199    ' +7dBm
'                       1 126 192    ' +10dBm  
'/////////////////////////////////////////////////////////////////////////
Main:
    DEBUGIN 10000, Main,[add,Address,mode] ' Loop here until PC data RX'd.
        SELECT CASE Add
            CASE 0: GOTO single
            CASE 1: GOTO burst
            CASE 2: GOTO multi
            CASE 3: GOTO CH_change
            CASE 4: GOTO CH_change_mod
        END SELECT
        
single: ' Sends only the Address value to the module. Takes 173us.
        _CSN = 0               ' Enable Select bit
        GOSUB chip_status      ' Allow data transfer when device ready
        SHIFTOUT MOSI,SCLK,1,[Address] 
        _CSN = 1               ' Disable Select bit
        DEBUG "Address value sent to module ",DEC Address,13,10    
GOTO Main

burst:  ' Sends Address and mode values together to the module. Takes 340us 
        _CSN = 0               ' Enable Select bit
        GOSUB chip_status      ' Allow data transfer when device ready
        SHIFTOUT MOSI,SCLK,1,[Address,mode] 
        _CSN = 1               ' Disable Select bit
        DEBUG "Address and Mode value sent to module ",DEC Address, " and ", DEC mode,13,10
GOTO Main        
        
multi:  ' Sends Address and mode values sequentually to the module
        _CSN = 0               ' Enable Select bit
        GOSUB chip_status      ' Allow data transfer when device ready
        SHIFTOUT MOSI,SCLK,1,[Address] 
        _CSN = 1               ' Disable Select bit
        PAUSEUS 50
        _CSN = 0               ' Enable Select bit
        WHILE MISO : WEND      ' Allow data transfer when device ready
        SHIFTOUT MOSI,SCLK,1,[mode] 
        _CSN = 1               ' Disable Select bit            
GOTO Main

CH_change:  ' Changes channel based on channel number input. Takes 1.19ms
        _CSN = 0               ' Enable Select bit
        GOSUB chip_status      ' Allow data transfer when device ready
        SHIFTOUT MOSI,SCLK,1,[$36]      ' Turn OFF TX
        SHIFTOUT MOSI,SCLK,1,[$12,$B0]  ' Setup for no modulation
        SHIFTOUT MOSI,SCLK,1,[$0A,Address]  ' Enter CH#
        SHIFTOUT MOSI,SCLK,1,[$31]  ' SFSTXON, Cal synth and stby
        SHIFTOUT MOSI,SCLK,1,[$35]  ' STX, turn ON transmitter         
        _CSN = 1               ' Disable Select bit
GOTO Main

CH_change_mod:  ' Changes channel and enables modulation. Takes 1.19ms 
        _CSN = 0               ' Enable Select bit
        GOSUB chip_status      ' Allow data transfer when device ready
        SHIFTOUT MOSI,SCLK,1,[$36]      ' Turn OFF TX
        SHIFTOUT MOSI,SCLK,1,[$12,$90]  ' Setup for modulation
        SHIFTOUT MOSI,SCLK,1,[$0A,Address]  ' Enter CH#
        SHIFTOUT MOSI,SCLK,1,[$31]  ' SFSTXON, Cal synth and stby
        SHIFTOUT MOSI,SCLK,1,[$35]  ' STX, turn ON transmitter         
        _CSN = 1               ' Disable Select bit
GOTO Main

chip_status:    ' Wait until module ready to accept new data
    IF MISO = 1 THEN chip_status
RETURN

END

Here's the schematic to go with that code:

Module demo.pdf



This code was used on the keyfob using the PIC16F685. I was able to send a 22 byte message error free using the TX FIFO register. I think the module configuration is the same as above but don't have my hand written notes handy.

main:    
    m = m+1
    GOSUB TX_FIFO
    Grn = 1
    GOSUB transmit      ' Takes 176us to send command
    Grn = 0
    WHILE !GDO0: WEND   ' Goes High after Preamble and Sync Word sent 
    WHILE GDO0 = 1      ' and takes 2ms before sending packet. 
        Grn = 1         ' Wait for TX to complete
    WEND                ' 1 byte packet takes 233us to TX
    Grn = 0
    GOSUB Clear_TX_FIFO   
    PAUSE 100
GOTO main

'==========================  Data packet loading  ========================
' Burst data into TX FIFO register $3F by adding $40
TX_FIFO:
    _CSN = 0               ' Enable Select bit
    GOSUB chip_status      ' Allow data transfer when device ready
    SHIFTOUT MOSI,SCLK,1,[$7F,$01,$02,$03,$04,$05,$06,$07,$08,$09,$0A,_
    $0B,$0C,$0D,$0E,$0F,$10,$11,$12,$13,$14,$15,$16,$17,m]     
    _CSN = 1               ' Disable Select bit
RETURN

'========================  Transmit routine ==============================
transmit:
    _CSN = 0               ' Enable Select bit
    GOSUB chip_status      ' Allow data transfer when device ready
    SHIFTOUT MOSI,SCLK,1,[$35]  ' STX, turn ON transmitter         
    _CSN = 1               ' Disable Select bit
RETURN

Clear_TX_FIFO:
    _CSN = 0               ' Enable Select bit
    GOSUB chip_status      ' Allow data transfer when device ready
    SHIFTOUT MOSI,SCLK,1,[$3B]  ' Flush out TX FIFO buffer             
    _CSN = 1               ' Disable Select bit
RETURN