I'm near the end of a project and would like to learn more about ARM processors for embedded use. I have experience with 8052, 386, HC11, and...

I'm near the end of a project and would like to learn more about ARM processors for embedded use. I have experience with 8052, 386, HC11, and 6800 derivatives, but nothing with the ARM. Since this is a learning exercise (for now), the requirements are minimal: * Documentation: complete and reasonable well done. * Form factor: don't much care, but easy interface with peripherials nice. ...

I used a 8052 MCU (24MHz crystal) and a 8 bits R-2R DAC to generate DTMF tones.The sampling frequency is 5kHz. The output is then input to a 2nd...

I used a 8052 MCU (24MHz crystal) and a 8 bits R-2R DAC to generate DTMF tones.The sampling frequency is 5kHz. The output is then input to a 2nd order LP filter. The telephone line seems to not recognize my tone. Is the order of filter enough or not? Thanks!

Just been handed a possible job that requires a encoder IC to be set up via SPI, about 20 r/w 8 bit registers. I'm going to use a 8052 with a ...

Just been handed a possible job that requires a encoder IC to be set up via SPI, about 20 r/w 8 bit registers. I'm going to use a 8052 with a 2 line LCD that's memory mapped, just because I have a couple of boards lying around I'll add a few buttons, but I was wondering if there is any neat way of organising the code (in C ) to play around with the registers while prototyping ( mucking...

Hi I will be doing a J1939 project soon. I need to : 1.pick a micro. 2.write or buy the stack. 3.figure out which doc I need to Buy from...

Hi I will be doing a J1939 project soon. I need to : 1.pick a micro. 2.write or buy the stack. 3.figure out which doc I need to Buy from SAE. 4.Maybe get a Book? On the micro I found PICs 8052s AVRs Ulf tell me why I should go with Atmel (really!!) Does Atmel have any appnotes or contracts in the U.S. I have 8052 experience no AVR. I have search the web. too much general ...

Hi I've been trying to program an AT89S52 PLC44 flash chip (8052) using an IceTech Micromaster LV48 programmer and it won't accept the...

Hi I've been trying to program an AT89S52 PLC44 flash chip (8052) using an IceTech Micromaster LV48 programmer and it won't accept the signature of the device. It gives an error message suggesting several possibilities - including "Secure". I can read an OTP device ok and its signature is ok. We use a PLCC to DIP adapter from micromaster - AD-44PL-44DIP. Anyone had problems wit...

I'm looking for dev / eval boards for 8051-variants. Can anyone recommend good/cheap boards that fit the following criteria: * Enough XRAM. I'd...

I'm looking for dev / eval boards for 8051-variants. Can anyone recommend good/cheap boards that fit the following criteria: * Enough XRAM. I'd need at least 2KB, but 5KB would be better. * There should be free tools to get the program onto the MCU. Ideally, I'd like to have boards for these 8051-variants: * Intel 8052-like * AMD 80C521-style dual dptr (DPL1 at 0x84, DPH1 at 0x85, DPS at 0...

Hi there, I'm trying to zero out the bitvars area in a 8052 cpu in the 'cstartup' file. My compiler (IAR) has two "assembler operators"...

Hi there, I'm trying to zero out the bitvars area in a 8052 cpu in the 'cstartup' file. My compiler (IAR) has two "assembler operators" SFB(..) and SFE(..) that gives me the start and end of the "bit addresses" that needs to be cleared. MOV R0,#SFB(BITVARS) SJMP CLEAR_BITVAR_2 CLEAR_BITVAR: CLR R0 INC R0 CLEAR_BITVAR_2: CJNE R0,#SFE(BITVARS),CLEAR_BITVAR Th...