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  1. Buzby

    SOUND command

    https://picaxeforum.co.uk/threads/a-method-to-make-complex-sounds-with-just-an-08m2.23176/ Here is an idea I used a few years ago.
  2. Buzby

    Auction - Steve Jobs job application from 1973

    Someone bought it ... ( The link is now defunct, so the price is not visible. If you are interested, it sold for £162,000 )
  3. Buzby

    Ethernet Cable?

    Put your phone number ( and Captcha code, which can't tell the difference between 1 and l ) in here .... https://www.broadbandchecker.btwholesale.com/#/ADSL This will tell you what speeds are available in your area. If you are with BT that probably means you are using Openreach cables, so...
  4. Buzby

    Ethernet Cable?

    If there's no difference between 'wired' and 'wireless' then its time for faster BB !.
  5. Buzby

    Parallel printing with a 20m2 picaxe

    Yes, you are right. It was late last night, I should have checked closer. However, I'm fairly certain that we could determine the condition of the data lines if we had a lot of test code and results. My gut feeling is that the wiring is correct, but the behaviour of the printer is not fully...
  6. Buzby

    Parallel printing with a 20m2 picaxe

    Looking at that manual you posted, it looks like CR, LF, and FF use the same codes in any of the printer modes, so you should have no problem there. The fact that you can print characters both upper and lower case means you have all the data lines correct. All that is left is the program ...
  7. Buzby

    Problem with i2c 1602 display

    Here is the manual. I've only had a quick look at the I2C part, normally I use serial. The I2C address 0x27 is correct, but it looks like this is the only address, and everything goes through this single address. So try sending individual characters. Also, your code is using 'writei2c' which...
  8. Buzby

    Auction - Steve Jobs job application from 1973

    I've not got the money to buy this, and if I had, I still wouldn't buy it ...
  9. Buzby

    PICAXE 28X2 and MIDI IN to serin?

    You can test your code without a MIDI connector or the Featherwing interface board. Just use a PC or second PICAXE to generate serial data at 31250 baud, using a hardwired connection. Have you got a USB-to-MIDI convertor ?. Using one of these with some free software, like MIDI-OX, will really...
  10. Buzby

    PICAXE 28X2 and MIDI IN to serin?

    If you are intending to use the PICAXE to receive from the Featherwing, the you need to identify MIDI OUT. I've not looked at the Featherwing datasheet, but if it is real MIDI it will be using opto-isolated current loops through 5-pin DIN connectors. It may be possible to hack the Featherwing...
  11. Buzby

    PICAXE 28X2 and MIDI IN to serin?

    You won't get a syntax error, but neither will you get any notes !. 'b31250_8' translates to the value 63. The 'serin' instruction requires a value of 0 to 7. ( See https://picaxe.com/basic-commands/serial-rs232-interfacing/serin/ for details. ) The only way you can use 'b31250_8' is with the...
  12. Buzby

    PICAXE 28X2 and MIDI IN to serin?

    Yes, and I used it when I did my MIDI drum kit experiments. ( See https://picaxeforum.co.uk/threads/drum-machine-its-not-quite-a-roland-or-a-korg-but-not-bad-for-few-hours-effort.31696/#post-329162 ) That circuit only did transmission of MIDI, using 'hserout'. One major problem I had was...
  13. Buzby

    Identifying bytes sent by IR?

    You are definatley getting the hang of background receive now. Regarding the overrun when the ptr advances slower than the hserptr, there is no solution to this other than making sure it never happens !. In real life it is very rare for it to overrun. The main use is to capture bursts of fast...
  14. Buzby

    Inaccuracy with background serial receive on 20X2

    Also, have you put decoupling on each opto ?. ( Datasheet says it needs it, so I'd do it ! )
  15. Buzby

    Inaccuracy with background serial receive on 20X2

    What is the behaviour like without the 'simulated environment' ?. In a parallel multi-drop system each node would not see any difference depending on it's location, the bus would look the same to all nodes. Even with a daisy-chain, where each node RXs the data and then TXs to the next node...
  16. Buzby

    Inaccuracy with background serial receive on 20X2

    Hi Andy, Have you checked closely the power and ground paths ?. Are you saying that your system has multiple 20X2 'targets', but only the 'last target' exhibits this effect ?. Cheers, Buzby
  17. Buzby

    Inaccuracy with background serial receive on 20X2

    My money is still on a wiring error, until we get confirmation one way or the other from the OP. I think the OP has a scope, and knows how to use it. I'd view the signals at both ends of the resistor, and if the scope is dual trace view the 'difference' signal.
  18. Buzby

    Inaccuracy with background serial receive on 20X2

    That's a long line !. Is this project on a PCB, or a bundle of breadboards ?.
  19. Buzby

    Inaccuracy with background serial receive on 20X2

    I too can not think of any reason where a series resistor will 'cure' a timing problem, especially as the problem seems worse a low baud rates, which is not usual at all. However, 'clean' when fast, but 'dirty' when slow could be caused by some kind of capacitive charge/discharge issue. Are...
  20. Buzby

    Identifying bytes sent by IR?

    ptr = hserptr ' Initialise pointer to start at current position of hserptr do if ptr <> hserptr ' If chr received, hserprt will be greater than ptr b0 = @ptrinc ' get character, and move ptr sertxd (#b0) ' show rxed chr endif loop
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