Bootstrap Mode

Started by Huey Fen in M68HC1112 years ago 34 replies

Good day, Here are some questions regarding the bootstrap mode. I've read through the bootstrap mode application notes (AN1060). But there...

Good day, Here are some questions regarding the bootstrap mode. I've read through the bootstrap mode application notes (AN1060). But there are something that I don't really understand. From pg 7 of AN1060, there is a paragraph sounds like this: "The number of data bytes in the downloaded program can be any number between 0 and 512 bytes (thesize of on-chip


Use JBUG11 instead of PCBUG

Started by Mark Schultz in M68HC1112 years ago 1 reply

A quick suggestion for those new to the 68HC11 who are trying to use PCBUG11 for debugging and loading programs: Don't. PCBUG11 is...

A quick suggestion for those new to the 68HC11 who are trying to use PCBUG11 for debugging and loading programs: Don't. PCBUG11 is a old DOS program that has known timing issues when used on a modern PC, even if that PC is booted into a 'pure' DOS mode. There's a much better, more modern alternative to PCBUG11: JBUG11. You can get it at:


Compiler Port Collaboration

Started by Mike McCarty in M68HC1112 years ago 8 replies

I see that there isn't a reasonable cheap compiler for the '11 and '12. I realize that the '11 is nearly dead, but I do use it, and would...

I see that there isn't a reasonable cheap compiler for the '11 and '12. I realize that the '11 is nearly dead, but I do use it, and would like a reasonable compiler for it, as a hobby. IOW, no $$$. I've been using a port of Small C I did several years ago, but I'm really missing structures and unions from time to time. Having long ints would be nice occasio


Help with FDIV

Started by sirius_advocate in M68HC1112 years ago 5 replies

Good day, everyone. I hope someone can help to clarify some confusion about FDIV function. We are using MEMSic for angle measurement. ...

Good day, everyone. I hope someone can help to clarify some confusion about FDIV function. We are using MEMSic for angle measurement. Without going into details about memsic chip and fucntions, we are required to compare some values obtained from memsic with the lookup table that we have to created on the 68hc11 board. Here are my problems: We are not allo


How to output a decimal number

Started by Gabe in M68HC1112 years ago 3 replies

does anyone know how to print a decimal number to the screen: I get: 92 91 90 8f 8e I want: 92 91 90 89 88 ...

does anyone know how to print a decimal number to the screen: I get: 92 91 90 8f 8e I want: 92 91 90 89 88 thanks dudes.


The connection of MAX232

Started by circuitcyco in M68HC1112 years ago 3 replies

Hello, can anyone here give me some information on the connection of host PC to MCU? I used MAX232 for voltage level conversion.I got few ...

Hello, can anyone here give me some information on the connection of host PC to MCU? I used MAX232 for voltage level conversion.I got few version of schematics from the internet and I am not sure which one is the correct one. I am not sure whether I should connect the XIRQ to the MAX232 or not. Please give me some feedback on this. Thanks a lot.


Urgent help with hc11!!!

Started by hombre_kenno69 in M68HC1112 years ago 19 replies

Hi all, i'm doing a course on the HC11 and i've been assigned a project that computes the distance between two points (given the change...

Hi all, i'm doing a course on the HC11 and i've been assigned a project that computes the distance between two points (given the change in height and length) thus using pythagoras to compute the hypoutenuse. I'm totally lost and stuck, since i'm not much of a programmer...at all So i'd appreciate any help at all! here's the question: The di


Problem regarding the Reset Pin of MCU

Started by Huey Fen in M68HC1112 years ago 13 replies

Hi here. I am doing my final year project on the design of Single Board Computer by using M68HC11. But I am facing a problem on the reset pin...

Hi here. I am doing my final year project on the design of Single Board Computer by using M68HC11. But I am facing a problem on the reset pin of the M68HC11. My reset circuitry worked fine without the connection of MCU. But once the MCU is connected to the reset circuitry, the reset pin (pin 17) of MCU became 0V. I suspected that the MCU had internally pull the reset pin to 0V. But I d


68HC11 E2

Started by pike_mat in M68HC1112 years ago 7 replies

I am looking for a 68HC11 E2 chip for my TAFE major project, we have been told that we need this specific chip as the E9 does not have ...

I am looking for a 68HC11 E2 chip for my TAFE major project, we have been told that we need this specific chip as the E9 does not have enough memory and if we choose another chip with higher memory we will be given a harder project and wont be able to work with our classmates because they will have a completely different project and probably couldn't help.


buffalo isr problem

Started by btraf311music in M68HC1112 years ago 30 replies

I am trying to produce some pulse width modulation code in C using the EmbeddedGNU IDE, and the board running under the Buffalo monitor,...

I am trying to produce some pulse width modulation code in C using the EmbeddedGNU IDE, and the board running under the Buffalo monitor, but I lose the clock signal right after running the program. To be specific I am using an EVBplus2 6811 board. We have determined that the interrupt vectors most likely have not been initialized properly since when an inter


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