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Messages - Keoni29
Pages: 1 ... 78 79 [80] 81 82 ... 168
1186
« on: July 20, 2013, 02:10:16 pm »
I type more english than dutch. I used to be on dutch forums too, but now I only post here.
1187
« on: July 20, 2013, 01:58:08 pm »
My Dutch score is the same as my english, but on the dutch test I'm better than 40% than all the guys who did the test and with the english test I am better than about 70%.
1188
« on: July 20, 2013, 01:30:43 pm »
I had a look at the IDE and especially the blink LED example that came with it. I understand that most of the code is for setting up the microcontroller and not for the cpu itself, but it's a lot of code right there. Have you seen it? Do you know if there is a community that uses these mcu, because I am sure I won't be able to figure out everything myself.
1189
« on: July 20, 2013, 09:29:02 am »
Yes, the topic dates back to 2011
1190
« on: July 20, 2013, 08:54:01 am »
32WPM. Guess I suck at keyboard typing or something.  (I'm faster on an 84+ keypad  )
Tokens aren't words.
1191
« on: July 20, 2013, 08:49:06 am »
1192
« on: July 20, 2013, 07:45:57 am »
I got one, but it's an old analog scope, so you cannot save anything or look at it longer than a split second.
1193
« on: July 20, 2013, 06:45:19 am »
Of course it should be cheaper than an arduino. You need less components to begin with since you have a nice regulated 5v coming out of the usb port, you don't need a usb to serial ttl converter and you don't need a double sided pcb. You save a lot of parts that way.
Edit: This is the basic principle of timing oscillators using just one hardware timer:
#include "TimerOne.h"
void setup()
{
DDRB = 255;
Timer1.initialize(16); // initialize timer1, and set a 1/2 second period
Timer1.attachInterrupt(sound); // attaches callback() as a timer overflow interrupt
Serial.begin(9600);
}
unsigned int counter[3] = {256,256,256};
unsigned int wavelength[3] = {256,128,64};
boolean gate[3] = {1,1,1};
void sound()
{
for (int i = 0; i<=2; i++){ // Cycle trough all the oscillators
if (counter[i] -- == 0){ // If the oscillator ends half a period
counter[i] = wavelength[i]; // Reset the counter to the wavelength
if (gate[i]) // If the gate is on
PORTB ^=1<<i; // Change the state of the oscillator pin
}
}
}
void loop()
{
if (Serial.available())
wavelength[0] = Serial.read();
if (Serial.available())
wavelength[1] = Serial.read();
if (Serial.available())
wavelength[2] = Serial.read();
}
You can set the wavelength by sending bytes via serial for this example. I don't mix the channels in software, but I use resistors for that. You can mix in software and output on one pin with pwm.
1194
« on: July 20, 2013, 04:42:06 am »
I have taken apart my only 84+ several times and I have done crazy mods to it (soundchip embedded in it, expansion port on the side, DC 5v power jack) I might give it a shot too. Try writing patterns of bytes to those ports and measure the voltage on those keyboard traces with the scope.
1195
« on: July 19, 2013, 02:38:34 pm »
Double posts make the mods cry. Please use the edit button 
1196
« on: July 19, 2013, 02:24:26 pm »
Living on the edge of the world comes with a price.
1197
« on: July 19, 2013, 02:11:49 pm »
Thank you for your information. Perhaps somone with a logic analyser can work some of this out.
1198
« on: July 19, 2013, 09:55:05 am »
Is that I/O directly interfaced with the cpu?
1199
« on: July 19, 2013, 09:53:32 am »
But I WANT to do a ridiculous amount of soldering to my 83+ You know I already interfaced many devices with the linkport. I wanna take interfacing hardware to another level.
1200
« on: July 19, 2013, 06:32:19 am »
Bump: Does anyone know anything about the pinout of the lcd driver? I suspect is is connected to the data bus, address bus and control lines of the z80, so I could tap into the I/O of the cpu there. Does anyone know anything about this module: pinouts, datasheets?  Edit:This is what I found so far: it's a Toshiba T6K04  Here are 17 pins going from the main board to a little pcb with the driver attached. For a z80 interface you only need 12 pins and 2 for power. Still no idea what the pinout is of this 17 pin connection. Is this correct? http://ripitapart.wordpress.com/2013/03/02/making-use-of-an-old-ti-83-plus-lcd-screen/He describes the pinout of the module here.
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