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Forum Index : Microcontroller and PC projects : Micromite beta 7
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Geoffg Guru  Joined: 06/06/2011 Location: AustraliaPosts: 3196 |
A note to anyone playing with the Micromite to check their inbox for the latest Micromite beta. In this version I have fixed the two bugs reported in beta 6 and added: - The IR SEND command for transmitting a Sony IR remote code. - Five PWM or SERVO outputs - The DISTANCE command which uses the HC-SR04 ultrasonic sensor to measure distance to a target. I know that I am going to regret asking this but is there any other device that would benefit from having support built into MMBasic? Whatever it is it would have to be readily available, reasonable cost, of interest to a lot of people, technically feasible and not easily doable in BASIC. I cannot guarantee to implement anything as the Micromite is running out of flash again and I still want to implement RF communications (the debate that is raging in the beta 6 thread). But, there might be something that is easy to do that I have missed. Geoff EDIT: The zip file contains both the 28 pin and 44 pin versions. The title of the zip file is confusing. Geoff Graham - http://geoffg.net |
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Zonker Guru Joined: 18/08/2012 Location: United StatesPosts: 761 |
Awesome Geoff..!! All nice additions. Is the IR transmit as simple as adding 1 or 2 IR LED's to the port line, or should we be using a 5v based driver circuit for better range..? Maybe other fine folks here can chime in of this one. This means we can construct a simple remote with keypad, display, IR or RF transceivers...!! (sweet) Thanks again Geoff for all your fine work on this project.. 
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9308 |
Received. Now, where the hell did I put my PICKIT3.......  Smoke makes things work. When the smoke gets out, it stops! |
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jman Guru Joined: 12/06/2011 Location: New ZealandPosts: 711 |
Thanks Geoff Your new version solves the problem of having to set the number of lines in TeraTerm perfectly And we got new features Regards Jman |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9308 |
@ jman - your PICKIT3 arrived at last then?  Smoke makes things work. When the smoke gets out, it stops! |
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| Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3196 |
You can drive an IR led directly but you must limit the current to about 10mA which will restrict the range. Page 16 of the manual shows a simple driver and using that you can get a far better range. Geoff Geoff Graham - http://geoffg.net |
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| jman Guru Joined: 12/06/2011 Location: New ZealandPosts: 711 |
It did :) |
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| JohnL Senior Member  Joined: 10/01/2014 Location: SeychellesPosts: 128 |
Thanks for new update Geoff. I use Humidity sensor DHT22 a far bit. Couple of very popular low cost units on ebay are DHT11 low resolution/accuracy and DHT22 higher res, by the way they are combined humidity and temperature sensors. They use proprietary 1-wire protocol, MMBasic is too slow to provide timing. http://www.ebay.com.au/sch/i.html?_odkw=dht+22humidity+senso r+arduino&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR 0.TRC0.H0.Xdht+22+humidity+sensor+arduino&_nkw=dht+22+humidi ty+sensor+arduino&_sacat=0 Would be good if MMBasic could support humidity measurement in firmware, it would compliment temperature measurement for environmental control type applications. I will dig up data sheet and post later. http://www.adafruit.com/datasheets/Digital%20humidity%20and% 20temperature%20sensor%20AM2302.pdf http://learn.adafruit.com/dht/downloads Please consider. Regards JohnL |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9308 |
That's GREAT! Now, if I could just find MINE! It's red, for God's sake, you would think it would stand out! Where the hell is it?!(rhetorical)
...rummage, rummage... Smoke makes things work. When the smoke gets out, it stops! |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6102 |
I have a couple of DHT22/AM2302 sensors to play with but haven't got around to it yet. I agree that they will be a challenge to do in MMbasic so I would add a vote for them to be included. My ultrasonic range module is a 3 wire unit. Everything is the same as the 4 wire one included but the start and return terminals are common. This is not a problem as MMbasic is quite capable of measuring the pulses. I had that one working 12 months ago. Jim VK7JH MMedit MMBasic Help |
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palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1873 |
I'll put in a vote for the humidity sensor. I've been using HH10D but the DHT22 with Temp as well would be a better choice. Paul. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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MicroBlocks Guru Joined: 12/05/2012 Location: ThailandPosts: 2209 |
Stepper motors with end stops monitoring. It would require 3 pins per motor. Direction, step and an input to monitor the end stop. In basic it gets large very quickly and timings of the signals is difficult. If there is enough code room there could be optional added functionality for acceleration and deceleration. Commands to move it to an absolute or relative location would allo BASIC to control the overall movements but it is freed from the nitty-gritty part also saving on MMBasic memory requirements. Microblocks. Build with logic. |
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| WhiteWizzard Guru Joined: 05/04/2013 Location: United KingdomPosts: 2817 |
Yet again you have exceeded expectations - another brilliant piece of work Geoff
Regarding anything else to include, Humidity sensor would be great and hopefully take up very little space to include (my money is on you having done this already!!  ).
Another device that would open up the MicroMite to creative builders out there would be RFID support. Before anyone says this is way too complex a topic let me suggest the following simple RFID module. This is a low cost reader designed to read a 13.56MHz tag at short range. There are alternatives but anything from Sparkfun is generally available around the world. Liken this module to a proximity card reader at a secured door. MMBasic could include a command such as 'Reader(pin,interrupt)' which simply jumps to the interrupt routine when a tag is detected outputting the TagID as a string and/or byte array (typically 8 bytes). Even though this could be coded in Basic, it would make it user friendly just like all the things you have already included (IR, Keypad, LCD, servo etc). So hopefully little code space required but opens up the world of reading single tags to make some interesting projects. For everything Micromite visit micromite.org Direct Email: whitewizzard@micromite.o |
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| plasma Guru Joined: 08/04/2012 Location: GermanyPosts: 437 |
Hi, The problem with the Ultrasonic Modules and Basic is to read the output length from. so ill guess a "simple" command to get this from a user specified port is enough , so the rest can calculate in basic . Maybe this way is usefull for other Hardware and costs less Flash Memory . Get Pulselenght Port(x) or something . I think this Command ( for Ultrasonic ) and other easy in Basic to implement Command (Gps .. ) is verry usefull for FPV Freaks and Car/ Robot Builder. If peek/poke really not usefull for micromite so kill it to get some flash but ill guess this give only a Small Part of Bytes . Thx for your Hard Works Geoff . gtx |
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| MicroBlocks Guru Joined: 12/05/2012 Location: ThailandPosts: 2209 |
A keypad that is connected uses a lot of pins, maybe a different wiring of the same keypad with some resistors to get a analog keypad that uses only one pin. This has been discussed in other topics before. It will make the 28pin version more capable. Especially in combination with an LCD (Which also uses an amount of pins) this would work great. [code] KEYPAD var, int, r1, r2, r3, r4, c1, c2, c3, c4 and analog version KEYPAD var, int, AnalogPin [/code] If keypad presses can be routed so that the uMite thinks it comes from the console would make writing programs that use keypad input a lot easier. An OPTION command could then be used to setup the routing. Another way would be to have a command that can push a keycode into the keyboard buffer. The keypad would then work normally through an interrupt and in the interrupt routine you would then determine which ascii value it would represent and then push it. This gives the programmer to dynamically attach ascii codes to keypad buttons. A program expecting input would then work like it is getting keyboard data from the console and would not know any different. Maybe still support a PS/2 keyboard, but only if memory allows it. Microblocks. Build with logic. |
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| plasma Guru Joined: 08/04/2012 Location: GermanyPosts: 437 |
hmm forget my suggestions , i write this before i opening the beta |
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| WhiteWizzard Guru Joined: 05/04/2013 Location: United KingdomPosts: 2817 |
Geoff, Slightly off topic - but TZAdvantage's last post prompted this: Could the MaxiMite be modified easily to support USB keyboards instead of PS2? Or would this take way too much space? Note I am NOT asking this for the uMite as simply not required . . . For everything Micromite visit micromite.org Direct Email: whitewizzard@micromite.o |
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| MicroBlocks Guru Joined: 12/05/2012 Location: ThailandPosts: 2209 |
USB host code is pretty complicated and the libraries that are available are big. I think it will be impossible. A USB Keyboard to serial adapter would be nice to have. It probably can be made with a small pic. (Another project on my todo list :) ) Microblocks. Build with logic. |
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| Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3196 |
Yes, doing USB host is rather complicated and anyway the Maximite (both colour and monochrome) do not have the correct connector. The other issue is that you would then loose the USB device function. It seems much easier to buy a PS2 keyboard. Geoff Geoff Graham - http://geoffg.net |
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| Frank N. Furter Guru Joined: 28/05/2012 Location: GermanyPosts: 831 |
Hi Geoff, five firmware independant PWM outputs! AMAZING! That's what I am waiting for!!! Thank you very much! It works perfectly! I've ordered a HC-SR04 for testing your new command!
Thanks a lot for your hard work!!!
Frank |
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