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hi wek,
thanks for your replies so far.
after i read your reply, i realised i have made a wrong description of the program execution. here is what's happening after re-lloking at the LA capture.
Actual events captured:
after fetching the first instruction of the main function which is the SUB...
I think the RAM is ok because when the SP is pointed to external address at 0x1700, the MCU is able to fetch from that external location. I checked this with the logic analyzer.
But after the MCU do the fetch @ address 0x1700 for the subtract, the MCU goes haywire by fetching data from address...
I set the SP in the assembly startup file provided by the compiler/assembler.
The below assembly execute at address 0x2080 and #SFE(CSTACK) takes a value which I specified in a configuration. Why is it so complicated. Well, compiler/assembler default procedure.
The value of #SFE(CSTACK) can...
I did not do anything to the stack. It happens when the main function is entered as you can see below. I do not understand why the IAR compiler produces this assembly to subtract the SP too...
Anyhow if I point the SP to internal RAM at address 0x200 and below, it works nevertheless, even with...
196kc logic analyzer
Anyone has experience with intel 80c196kc and its stack pointer?
I have problem declaring my stack pointer to external memory address even though the datasheet says the stack can be located in external or internal.... I have hooked up the MCU data and address lines to a...
lcd displays 6 digits with 44780
take a look this.
http://www.micro4you.com/product_info.php?products_id=65&osCsid=473ff1c8fae8842f1ad99c2ece28c03f
or else you can email me. I will try to help as I know some LCD sources.
Added after 7 minutes:
sorry that has controller. maybe this is...
inese
I have experience and can provide deisgn services in the following areas. Email me at kasd@inbox.lv
LCD Control
Inter-connect: USB salve and host, Serial Interface, UART, RS232, RS422, RS485, LVDS etc
Mass Storage Control: ATA/ATAPI
Motor Control
Infra-Red Devices
Neural Network
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