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Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 6808

Posted: 08:18pm 15 Apr 2023

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Probably because only one value was expected and that was going to be printed.

As an alternative you can use a numeric array as rcvbuf. See the I2C READ instruction in the manual.

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

phil99

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Joined: 11/02/2018
Location: Australia
Posts: 2140

Posted: 01:07pm 03 May 2023

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"As an alternative you can use a numeric array as rcvbuf"

And here is one way to do that, added to Peters original.

'VL53LOX laser distance measurement.
Const I2Caddr=&H29 'VL53LOX device address
Dim d$
Dim integer dst(1)
'I2C open 100,1000 'Comment out for System I2C
I2C write I2Caddr,0,2,&H89,&H1
Font 5
Pause 200
CLS
Print "Integer", "String"
Do
get.dist.str
Pause 200
get.dist.int
Print dist.i%, dist.s%
Pause 200
Loop

Sub get.dist.str 'Get distance using a string
I2C write I2Caddr,0,2,0,1
I2C write I2Caddr,1,1,&H1E
I2C read I2Caddr,0,2,d$ 'read 2 character string
dist.s% = Str2bin(uint16,d$,BIG) 'convert string to integer
Text MM.HRes/2,MM.VRes/3," "+Str$(dist.s%)+"mm ",cm
End Sub

Sub get.dist.int 'Get distance using integers
I2C write I2Caddr,0,2,0,1
I2C write I2Caddr,1,1,&H1E
I2C read I2Caddr,0,2,dst() 'read 2 bytes
dist.i% = (dst(0)<<8) + dst(1) 'combine 2 bytes
Text MM.HRes/2,MM.VRes*2/3," "+Str$(dist.i%)+"mm ",cm
End Sub

Tested ok.
Edited 2023-05-03 23:09 by phil99

stanleyella

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Joined: 25/06/2022
Location: United Kingdom
Posts: 2130

Posted: 11:25pm 03 May 2023

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nice phil99 but errors on glcd

phil99

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Joined: 11/02/2018
Location: Australia
Posts: 2140

Posted: 11:47pm 03 May 2023

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Down loaded the code from my previous post into a PicoMiteVGA and it runs without problem.

TeraTerm
> RUN
Integer String
1256 0
1258 1252
1254 1257
1258 1257
1257 1259
335 361
337 326
337 344
340 327
312 352
1256 1259
1258 1254
1252 1254

Also on VGA screen.

Also tested ok standard PicoMite with ILI9488.
.
Edited 2023-05-04 17:52 by phil99

stanleyella

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Joined: 25/06/2022
Location: United Kingdom
Posts: 2130

Posted: 05:07pm 04 May 2023

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@phil99 - thanks but still errors when pasting into tera term.
I pasted into mmedit previously.

Const I2Caddr=&H29 'VL53LOX device address
Dim d$
Dim integer dst(1)
'I2C open 100,1000 'Comment out for System I2C
I2C write I2Caddr,0,2,&H89,&H1
Font 5
Pause 200
CLS
Print "Integer", "String"
Do
get.dist.str
Pause 200
get.dist.int
Print dist.i%, dist.s%
Pause 200
Loop

Sub get.dist.str 'Get distance using a string
I2C write I2Caddr,0,2,0,1
I2C write I2Caddr,1,1,&H1E
I2C read I2Caddr,0,2,d$ 'read 2 character string
dist.s% = Str2bin(uint16,d$,BIG) 'convert string to integer
Text MM.HRes/2,MM.VRes/3," "+Str$(dist.s%)+"mm ",cm
End Sub

Sub get.dist.int 'Get distance using integers
I2C write I2Caddr,0,2,0,1
I2C write I2Caddr,1,1,&H1E
I2C read I2Caddr,0,2,dst() 'read 2 bytes
dist.i% = (dst(0)<<8) + dst(1) 'combine 2 bytes
Text MM.HRes/2,MM.VRes*2/3," "+Str$(dist.i%)+"mm ",cm
End Sub

'teraterm errors ----------------------------!
> Const I2Caddr=&H29 'VL53LOX device address
Error : I2CADDR Global variable already declared
> Dim d$
Error : d$ already declared
> Dim integer dst(1)
> 'I2C open 100,1000 'Comment out for System I2C
> I2C write I2Caddr,0,2,&H89,&H1
> Font 5
> Pause 200
> CLS
> use 200
Error : Unknown command
> Loop
Error : LOOP without a matching DO
>
> Sub get.dist.str 'Get distance using a string
Error : No matching END declaration
> I2C write I2Caddr,0,2,0,1
> I2C write I2Caddr,1,1,&H1E
> I2C read I2Caddr,0,2,d$ 'read 2 character string
> dist.s% = Str2bin(uint16,d$,BIG) 'convert string to integer
Error : DIST.S is not declared
> Text MM.HRes/2,MM.VRes/3," "+Str$(dist.s%)+"mm ",cm
Error : DIST.S is not declared
> End Sub
Error : Nothing to return to
>
> Sub get.dist.int 'Get distance using integers
Error : No matching END declaration
> I2C write I2Caddr,0,2,0,1
> I2C write I2Caddr,1,1,&H1E
> I2C read I2Caddr,0,2,dst() 'read 2 bytes
> dist.i% = (dst(0)<<8) + dst(1) 'combine 2 bytes
Error : DIST.I is not declared
> Text MM.HRes/2,MM.VRes*2/3," "+Str$(dist.i%)+"mm ",cm
Error : DIST.I is not declared
> End Sub

stanleyella

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Joined: 25/06/2022
Location: United Kingdom
Posts: 2130

Posted: 05:18pm 04 May 2023

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This works for distance% to be used as a var.
option autorun on
OPTION EXPLICIT
OPTION DEFAULT NONE
Dim d$,dist%
Const i2caddr=&H29
I2C write i2caddr,0,2,&H89,&H1
Font 2
Pause 200
CLS
Do
getdistance
Pause 100
Loop
'
Sub getdistance
I2C write i2caddr,0,2,0,1
I2C write i2caddr,1,1,&H1E
I2C read i2caddr,0,2,d$
'text 0,0,(Str$(Str2bin(uint16,d$,BIG),3,0))+" mm "
dist%=(Str2bin(uint16,d$,BIG))
text 0,20,(str$(dist%))+" mm "
End Sub

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 9133

Posted: 05:45pm 04 May 2023

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Quote 'teraterm errors ----------------------------!

Perhaps AUTOSAVE might have helped

stanleyella

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Joined: 25/06/2022
Location: United Kingdom
Posts: 2130

Posted: 10:00pm 04 May 2023

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phil99 - your idea works, thanks for help. I'm going to redo my gcbasic robot using mmbasic.

Dim dist%,dst%(1)
Const i2caddr=&H29
I2C write i2caddr,0,2,&H89,&H1
Font 2
Pause 200
CLS
Do
getdistance
Pause 100
Loop
'
Sub getdistance
I2C write i2caddr,0,2,0,1
I2C write i2caddr,1,1,&H1E
I2C read i2caddr,0,2,dst%()
'dist% = (dst%(0)<<8) + dst%(1) 'combine 2 bytes
dist% = (dst%(0)*256) + dst%(1) 'combine 2 bytes
text 0,20,(str$(dist%))+" mm "
End Sub

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