Books for the M68HC11 | M68HC11 | EmbeddedRelated.com

Here are two texts that good: "Microcontroller Technology - The 68HC11"; Peter Saspov, Prentice Hall "Data Acquisition and Process Control with the M68HC11 Microcontroller"; Driscoll etal; Prentice Hall Nick -----Original Message----- From: Israel Brewster [mailto:] Sent: Tuesday, November 30, 2004 12:16 PM To: Subject: [m68HC11] Re: Code Auto Execution problem yeah, good advice- and absolutely true. The annoying thing about this situation is that, as far as I can tell, the need to initialize the OPTION register is completely undocumented, at least in the materials I have available. Its existence is not even mentioned in the book I have on the subject. So while I am aware of the need to initialize everything, I don't know what all needs to be initialized. This, of course, leads to very annoying problems such as the one I just experienced. If anyone wants to suggest some good reference sources for programing with the HC11/HC12 (thinking of moving up) that mention such things, I would appreciate it. Thanks again everyone. --- In , "Mark Schultz" <n9xmj@y...> wrote: > > --- In , Scott Grodevant <scott14468@y...> > wrote: > > Hi all and Israel, > > > > My memory fails me for specifics about the HC11 (without going to > > the manual), but I am pretty sure there is a configuration register > > associated with the ADC that must be initialized before using it. > > Without BUFFALO running to do it for you, the ADC is probably > > disabled. > > What Scott says here comes close to the advice I will offer. > > When you transition from a debug environment (e.g. > BUFFALO/PCBUG/JBug/etc.) to a 'standalone' runtime environment, you > must take care to ensure that your program includes ALL necessary > initialization code. This means things like: Setting the stack > pointer and status register properly, initializing all your RAM > variables to known values, setting values in time-protected registers > such as HPRIO, and initializing ALL subsystems you are using. > > You can get away without doing much of the above because a typical > monitor program will place the MCU in a known, safe-operation state > as part of its own initialization. This is not true when you start > up out of reset directly into your own program. You are responsible > for initializing any subsystem/peripheral you choose to use, and are > also responsible for initializing the CPU registers and memory > appropriately. Yahoo! Groups Links

(You need to be a member of hc11 -- send a blank email to hc11-subscribe@yahoogroups.com )

Sign in

Search hc11

Subscribe to hc11

Ads

Discussion Groups

Discussion Groups | M68HC11 | Books for the M68HC11

Books for the M68HC11 - Nick Reitter - Nov 30 13:10:00 2004