Hello resident PICAXE experts,
I seem to be misunderstanding the operations of HSERSETUP and associated commands. I thought I understood it, but I must be wrong. Only problem is, the below code all seems to function fine in the editor's simulator, but in circuit it fails.
Two identical circuits for testing (See attached PDF)
Confirmation of several things from initial power up...
1. If unit1 is triggered and transmits a 1, unit2 happily replies with a 2. They both return to the start of the program and happily run the LED sequencer until the loop finishes. Happy days! This can be done over and over flawlessly.
2. If I now trigger unit2 to transmit a 1, it does, but unit1 fails to reply with a 2 as it should, therefore unit2 now retries over and over. <---- Here is the problem!
3. The RF transceivers have been removed from circuit. Linking HSERIN-HSEROUT of the two chips = same result. (I initially suspected a transceiver issue, but clearly it's my coding.)
4. What appears to be happening is that once a unit has been the triggered transmitter, it's HSERINFLAG is not being flagged when serial data is received. It does not even leave the main: loop.
From what I currently understand, the scratchpad pointer points to 0 address when the HSERSETUP command is executed.
When I make one unit transmit a 1, the second unit receives the 1 and puts it in scratchpad address 0 and now the receiving unit's pointer automatically shifts to scratchpad address 1.
So because I am only using 1 byte in this test, I receive the byte into scratchpad address 0, read the byte into variable b1 (get 0,b1), then reset the pointer back to scratchpad address 0 (hserptr=0) and reset the Hserinflag also to 0 (hserinflag=0), making things again ready to receive a serial transmission into address 0.
Please help me to clearly understand. What am I doing wrong experts???
View attachment PICAXE Hardware Serial Testing RF link.pdf
Regards,
Morty.
I seem to be misunderstanding the operations of HSERSETUP and associated commands. I thought I understood it, but I must be wrong. Only problem is, the below code all seems to function fine in the editor's simulator, but in circuit it fails.
Two identical circuits for testing (See attached PDF)
Confirmation of several things from initial power up...
1. If unit1 is triggered and transmits a 1, unit2 happily replies with a 2. They both return to the start of the program and happily run the LED sequencer until the loop finishes. Happy days! This can be done over and over flawlessly.
2. If I now trigger unit2 to transmit a 1, it does, but unit1 fails to reply with a 2 as it should, therefore unit2 now retries over and over. <---- Here is the problem!
3. The RF transceivers have been removed from circuit. Linking HSERIN-HSEROUT of the two chips = same result. (I initially suspected a transceiver issue, but clearly it's my coding.)
4. What appears to be happening is that once a unit has been the triggered transmitter, it's HSERINFLAG is not being flagged when serial data is received. It does not even leave the main: loop.
From what I currently understand, the scratchpad pointer points to 0 address when the HSERSETUP command is executed.
When I make one unit transmit a 1, the second unit receives the 1 and puts it in scratchpad address 0 and now the receiving unit's pointer automatically shifts to scratchpad address 1.
So because I am only using 1 byte in this test, I receive the byte into scratchpad address 0, read the byte into variable b1 (get 0,b1), then reset the pointer back to scratchpad address 0 (hserptr=0) and reset the Hserinflag also to 0 (hserinflag=0), making things again ready to receive a serial transmission into address 0.
Please help me to clearly understand. What am I doing wrong experts???
Code:
'Hardware Serial RF link Test
'Using only 1 Byte Background serial receive
'PICAXE 20X2
'C.0 - HSEROUT
'B.6 - HSERIN
'B.0 - LED 1
'B.1 - LED 2
'C.1 - Trigger input - 1=TRIGGERED
'C.7 - Busy signal from transceiver - 0=BUSY, 1=READY
'Variables
'B1 - Transmission Trigger & Acknowledge - 1-Trigger, 2-Acknowledge
'B2 - Flashing LED Sequence ACTIVE/INACTIVE - 1-ACTIVE, 0-INACTIVE
'W3 & W4 - Calculus for LED sequencing
init:
setfreq m16
hsersetup B9600_16, %00001
input c.7
main:
if b2=0 and pinc.1=1 then pause 600 gosub transmit endif
If HSerInFlag = 1 then gosub rx
if b2=1 then gosub operation
goto main
transmit:
let b1=1
hserout 0,(b1) 'Send Trigger message. (A number 1)
waiting:
if pinc.7=0 then goto waiting
hserin [5000],0,1 'Allow plenty of time for receiving node to transmit back a confirmation. (A number 2)
get 0,b1
if b1=2 then goto received
goto transmit 'If confirmation not received... Resend!
received:
let b1=0
let b2=1
hserptr=0 'Reset scratchpad pointer to 0
hserinflag=0 'Reset Serial data received flag to 0
return
rx:
get 0,b1
if b1=1 then goto rxed
hserptr=0 'Reset scratchpad pointer to 0
hserinflag=0 'Reset Serial data received flag to 0
let b1=0
return
rxed:
let b1=2
hserout 0,(b1)
let b1=0
let b2=1
hserptr=0 'Reset scratchpad pointer to 0
hserinflag=0 'Reset Serial data received flag to 0
return
operation:
let w3=w3+1
if w3=160 then let w3=0 let w4=w4+1 endif
if w4=20 then goto operationcomplete
if w3<20 then high b.0 low b.1 return endif
if w3>=20 and w3<40 then low b.0 low b.1 return endif
if w3>=40 and w3<80 then high b.0 low b.1 return endif
if w3>=80 and w3<100 then low b.0 high b.1 return endif
if w3>=100 and w3<120 then low b.0 low b.1 return endif
if w3>=120 and w3<160 then low b.0 high b.1 return endif
operationcomplete:
low b.0
low b.1
let w3=0
let w4=0
let b2=0
hserptr=0 'Reset scratchpad pointer to 0
hserinflag=0 'Reset Serial data received flag to 0
returnRegards,
Morty.