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Forum Index : Microcontroller and PC projects : Array Syntax
| Author | Message | ||||
| Phil23 Guru  Joined: 27/03/2016 Location: AustraliaPosts: 1667 |
Hi All, Just trying to understand this a bit better; Arrays have always been a love/hate for me.... I2C read &H5A, 0, 2, Baseline() ' read the register Baseline(2) = true VAR Save Baseline() 2nd line I assume sets a 1 in element 2, 3rd line saves the entire array. But not quite clear in the 1st that addresses (). Tried to think it out in DOS, but get a few unexpected results. Particularly the 1st attempt to set element 0; Returning an error, but then setting Ok after doing element 1. Guess what I'm asking for is a better understanding of the usage of (). Thanks Phil. DOS MMBasic Ver 5.05.02 Copyright 2011-2019 Geoff Graham > dim integer baseline(2) > print baseline() Error: Dimensions > print baseline(0) 0 > baseline(0)=1 Error: Unknown command > baseline(1)=2 > baseline(0)=1 > baseline(2)=3 > print baseline(0) 1 > print baseline(1) 2 > print baseline(2) 3 > print baseline() Error: Dimensions > Edited 2020-03-13 06:56 by Phil23 |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6283 |
The only time you use an array name without a dimension is when you pass the full array to a sub/function etc. For normal use, you need the dimension or index Depending on OPTION BASE, the first valid value for an index is 0 or 1 VAR SAVE and I2C are examples of passing the array name and therefore don't need the index Jim VK7JH MMedit |
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| Phil23 Guru Joined: 27/03/2016 Location: AustraliaPosts: 1667 |
Thanks Jim, I'm still at a loss as to why baseline(0)=1 returned Unknown Command. Just tried to reproduce it & I can't. DOS MMBasic Ver 5.05.02 Copyright 2011-2019 Geoff Graham > dim integer baseline(2) > print baseline() Error: Dimensions > print baseline(0) 0 > baseline(0)=1 > Planning on modifying Geoff's Airqual code by adding some Console output via ESP-Link & HC-12 Comms for logging on the E64. I am pretty sure it will see the sensor as New, & uncalibrated each time I load the updated code. Assuming I can read all the saved VAR's & reload them at boot while I't testing the new code. Phil. |
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