Recent content by frank2644

My problem is that I have a HD44780 LCD display that requires a parallel interface and I need to dynamically format the data stream before I can output it to the display. For example, formatting is inherently supported with the sertxd command e.g., sertxd("hello world", b0, b1,13,$0a). Is...

I have an Ebay HD44780 LCD equipped with a piggybacked PCF8574 expander chip. I have been able to make it work in 4-bit mode thanks to many of the related threads on this forum. Unfortunately 4-bit mode requires some awkward programming every time you display a message. So my question is, why...

I'm confused about the I2C address configuration for a 20x2. When a slave device specifies it's address as hex 3F is the HI2CSETUP address parameter %00111111 or %00111110 (since the Picaxe manual says that B0 should be 0)? Thanks Frank

I just finished assembling the AXE133Y OLED and it seems to be basically working but is has some problems. I tested it by sending inverted 2400 bps data from my PC and it worked pretty good, but occasionally a character would be scrambled. I was able to fix that occasional scrambling by...

I've been using the Picaxe 20x2 for awhile and I am pretty happy with that chip. Recently I have discovered a need for a 2.048 ref voltage for the ADC function and the 20x2 does not have that capability. So basically my question is, what chip should I use to get the internal 2.048 ref and...

I'm trying to setup VREF+ to 1.024 ref voltage on a 20x2 chip. In reading many threads on this subject I'm really confused. The documentation seems to say that on a 20x2 ADC1 is used. I assume that means to connect the 1.024 ref voltage to the ADC1 pin. But then I see code examples using...

I need to search up to 100 10 digit phone numbers quickly, maybe 1/4 second. Can this be done with a picaxe? Best I kind tell is that some kind of add on memory is needed, but it needs to be pretty fast. I'm also hoping to be able to load these phone numbers into memory when I load the Picaxe...

Is there a way to send the time of day to the picaxe when you load it? Ideally this would be automatic rather than have the picaxe prompt you to enter it. Once loaded I think I can figure out how to make the picaxe keep the time updated. Not sure it makes a difference but I have a 20x2 chip...

I'm looking for specifications on the ADC function. Is there a detail spec somewhere? The question that I am trying to answer is related to the ADC 8 bit resolution. As I understand it the ADC will measure 0-5 v in 256 steps, therefore each step is about 20 mv. My question is when is the step...