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Re: TI CC1101 Radio Project
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
"If we knew what we were doing, it wouldn't be called research"
- Albert Einstein
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Re: TI CC1101 Radio Project
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.
Louie
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Re: TI CC1101 Radio Project
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.
Here's the schematic to go with that code:Code:'**************************************************************** '* 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
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.
Code: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
Louie
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Re: TI CC1101 Radio Project
Thanks Louie-
I plan on using the A1101R09A00GM module, is that what you used? It should arrive tomorrow.
My idea is more of using these modules as a transmitter and receiver application even though they are transceivers.
How did you use the RSSI or did you? I would like to be able to see which transmitter is closest to which receiver. and then establish a link, send a few bytes and that pretty much it. More of a sensor transmission....
Does this sound reasonable given your experience?
-Steve
"If we knew what we were doing, it wouldn't be called research"
- Albert Einstein
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Re: TI CC1101 Radio Project
I have successfully used the RSSI from a receiver for TPM testing at work while designing an AGC circuit for a TPM Transmitter program. just remember that if using ASK transmissions you will need a fast A/D and you should gather enough data during a xmission to see the PEAK level. I have used this to program an 8 bit attenuator at the frontend of the receiver using successive approximation routine I wrote. That way each of the test Transmitters have the same received signal strength to the receiver for timing verification purposes. It is NOT as critical for the A/D if you are using FSK mode. I wish I could share more but I wrote the software for the company I work for... Good Luck...
Dave Purola,
N8NTA
EN82fn
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Re: TI CC1101 Radio Project
You're welcome Steve,
Yup, that's one of them. I also used the other where you have to connect an external antenna.
The device has a digital RSSI register that can be read continuously. I never got to it in that last product where I was going to use for "clear channel search".
The code provided sets the transmitter modulation to 4 level FSK at +-39KHz deviation if I recall.
It can be configured to be a transmitter only, receiver only or switch between the two modes, it's up to you.
Your application is feasible, keeping air time management in mind to avoid transmission collisions, just like you would anyways with direct data connections.
Here's 1 data sheet on the RSSI you can go through. I couldn't upload the other because of it's size but can get it here.
Dave- What is TPM?
Louie
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Re: TI CC1101 Radio Project
thanks Guys-
My modules are due in tomorrow, however, I have to go out of town on business so it will have to wait a bit longer darn it.
I really can't wait to see this work!
The MRF module never did work nor could I find ANYONE who saif they got it to work in packets!
Thanks again. Will keep you posted on progress - and code.
Regards to All.
"If we knew what we were doing, it wouldn't be called research"
- Albert Einstein
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