Debug 1Pin and chosen resistor values
Buck Rogers
Posts: 2,185
Hello!
In examining the code shown here:
It gives a region of resistor values, with the one of 270 chosen as if the person who wrote it found that it worked for that person. But that anything in that series might work.
Is this correct?
In examining the code shown here:
[FONT=lucida console]'' ┌──────────────────────────────────────────────────────────────────────────┐
'' │ Debug using 1-PinTV and 1-Pin KBD demo v1.20 │
'' ├──────────────────────────────────────────────────────────────────────────┤
'' │ Authors: (c) 2010 "Cluso99" (Ray Rodrick) │
'' │ Acknowledgements: see relevant files for authors and acknowledgements │
'' │ License MIT License - See end of file for terms of use │
'' └──────────────────────────────────────────────────────────────────────────┘
'' RR20100424 v1.10 Add sample code for 1-Pin Keyboard driver
'' and include TV calcs program in archive.
''
'' Demo program just reads and writes characters from/to the serial port (echoes input)
'' It also echoes the input characters (optionally in hex) to the debug port (the 1-pinTV cog)
'' for display on a TV.
'' v1.10 adds the 1-pinKBD driver also. This can easily be commented out if not required.
'' Any characters typed on the keyboard are also echoed to both the serial port and debug port.
'' RR20100505 v1.20 Add auto-calculation of parameters by just setting PAL/NTSC & cols
'' RR20100505 v1.25 Code shrink (for later VT100 use); variable screen size
'──────────────────────────────────────────────────────────────────────────────────────────────────
' Here is the 1-Pin TV connection diagram...
' 270R(100R-1K1)
' Prop tvPin Pxx (P14) ────────────────────────────────────────────────┐
' ──┐ ┌ TV
' ┴ ┴
'──────────────────────────────────────────────────────────────────────────────────────────────────
' Here is the 1-Pin Keyboard connection diagram...
' ┬ 5V ┬ ┬ 5V ┬ Keyboard
' ──┘ 10K   10K └─ +5V
' ──┻─┼───────────────────────── kbdclk
' Prop kdPin Pxx (P26) ──────────────────────┻───────────────────────── kbddata
' ──┐ 100R ┌─ Gnd
' ┴ ┴
'──────────────────────────────────────────────────────────────────────────────────────────────────
CON
' Select for your hardware
' Protoboard, Demoboard, TriBlade#1, etc
_XINFREQ = 5_000_000 + 0000
_CLKMODE = XTAL1 + PLL16X
rxPin = 31 'serial
txPin = 30
baud = 115200
tvPin = 14 'TV pin (1-pin version) (best pin to use if trying on existing circuit)
kdPin = 26 'Kbd pin (1-pin version) (use this pin if trying on existing circuit)
{
' TriBlade#2
' _XINFREQ = 5_000_000 + 0000
' _XINFREQ = 6_000_000 + 0000 'most are 5_000_000
_XINFREQ = 6_500_000 + 0000 'most are 5_000_000
_CLKMODE = XTAL1 + PLL16X
' _XINFREQ = 13_500_000 + 0000 'most are 5_000_000
' _CLKMODE = XTAL1 + PLL8X
rxPin = 31 'serial
txPin = 30
baud = 115200
tvPin = 14 'TV pin (1-pin version)
kdPin = 26 'Kbd pin (1-pin version)
}
OBJ
fdx : "FullDuplexSerial" 'serial driver
dbg : "Debug_1pinTV" 'debug display driver
kb : "Debug_1pinKBD" 'debug keyboard driver
PUB main | ch, i, j, t
' waitcnt(clkfreq*5 + cnt) 'delay (5 secs) to get terminal program runnining (if required)
fdx.start(31,30,0,baud) 'start serial driver to PC
dbg.start(tvPin) 'start the Debug 1pinTV driver
fdx.tx(13) '<cr> in case 0 does not clear screen
fdx.tx(0) 'clear screen
fdx.str(string("Debug demo v1.25",13))
dbg.chr(0) 'clear screen
dbg.str(string("Debug demo v1.25",13))
'start the 1pinKBD driver
'──────────────────────────────────────────────────────────────────────────────────────────────────
'first calculate the timing
' note you can skip this if you always use the same kbd & xtal by and hardcode the times in kb.start below
fdx.str(string("Hit <spacebar> to synchronise keyboard "))
dbg.str(string("Hit <spacebar> to synchronise keyboard "))
t := kb.calckbdtime(kdpin) 'calculate the keyboard timing
fdx.str(string("Timing = ")) '\ optionally show the timing calculated
fdx.dec(t & $FFFF) '|
fdx.tx(",") '|
fdx.dec(t >> 16) '/
fdx.tx(13)
dbg.tx(13) '<cr>
'start the 1pinKBD driver (using the timing returned)
kb.start(kdpin, t & $FFFF, t >> 16) 'start the 1pinKbd driver
'──────────────────────────────────────────────────────────────────────────────────────────────────
' kb.start(kdpin, 6741, 7259) 'start the 1pinKbd driver (e.g. fixed bittimes)
'──────────────────────────────────────────────────────────────────────────────────────────────────
'display the video parameters
if dbg#PAL
dbg.str(string("PAL "))
else
dbg.str(string("NTSC "))
dbg.dec(dbg#ocols)
dbg.chr("x")
dbg.dec(dbg#orows)
dbg.chr(13)
'fill the remaining screen as an example
repeat j from 0 to dbg#orows -5 'rows less 4
repeat i from 0 to dbg#ocols -1 'cols
dbg.chr(i + $30) 'character sequence from 0...
repeat
ch := fdx.rxcheck 'get an input char from pc (-1 if none)
if ch <> -1 'if input character
fdx.tx(ch) 'display it on the pc
dbg.chr(ch) 'display on debug screen
' dbg.chr("$") '\ uncomment to send out the hex characters
' dbg.hex(ch,2) '| to the debug screen
' dbg.chr(" ") '/
ch := kb.rxcheck 'get an input char from kbd (-1 if none)
if ch <> -1 'if input character
fdx.tx(ch) 'display it on the pc
dbg.chr(ch) 'display on debug screen
{
'other examples of reading the keyboard characters
if kb.peek <> 0 'see if input char (0 if none)
ch := kb.in 'get the keyboard char
dbg.out(ch) 'display it
fdx.tx(ch)
if kb.rxavail 'see if input char (true -1 if avail)
ch := kb.in 'get the keyboard char
tv.out(ch) 'display it
fdx.tx(ch)
}
dat
{{
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├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
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}}
[/FONT]
It gives a region of resistor values, with the one of 270 chosen as if the person who wrote it found that it worked for that person. But that anything in that series might work.
Is this correct?
Comments
Hello!
Okay then. I decided to put it aside, that is not to try it on the QS. I'll probably obtain one of the other boards soon.