8-bit MicrocontrollersのトピックRe: Flash memory https://community.nxp.com/t5/8-bit-Microcontrollers/Flash-memory/m-p/218458#M19030 <HTML><HEAD></HEAD><BODY><P>This seems to be a split thread.&nbsp; The original thread may be found <A __default_attr="68542" class="jive_macro jive_macro_thread default_title" href="https://community.freescale.com/thread/68542" jivemacro="thread" title="here">here</A>.</P><P>&nbsp;</P><P>Mac</P><P>&nbsp;</P></BODY></HTML> Tue, 17 Aug 2010 23:23:41 GMT bigmac 2010-08-17T23:23:41Z Flash memory https://community.nxp.com/t5/8-bit-Microcontrollers/Flash-memory/m-p/218457#M19029 <HTML><HEAD></HEAD><BODY><P>Could anyone show me by example how to save 1 byte data into flash memory and get it back to the variable? I create a variable POWEROFF, and I give 1 to this variable in the main routine. I need to save the content of POWEROFF to a (any)location in flash memory before the MCU is disconnected from power. Then I need to get this data back into this variable when MCU is connected to power again.</P><P>&nbsp;</P><P>I tried to use those supporting routines in ROM, such as RDVRRNG, PRGRNGE and ERARNGE. So far I am getting no where. I hope someone can show me an example in assembly code.</P><P>&nbsp;</P><P>INCLUDE 'derivative.inc'&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ; MC68HC908QY4A</P><P>&nbsp;</P><P>poweroff&nbsp;&nbsp;&nbsp; ds&nbsp; 1</P><P>&nbsp;</P><P>mainLoop:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P><P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lda &nbsp;#$1</P><P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sta &nbsp;poweroff</P><P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;bra&nbsp; mainLoop</P><P>&nbsp;</P><P>Thanks all</P></BODY></HTML> Tue, 17 Aug 2010 00:33:23 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/Flash-memory/m-p/218457#M19029 aurora 2010-08-17T00:33:23Z Re: Flash memory https://community.nxp.com/t5/8-bit-Microcontrollers/Flash-memory/m-p/218458#M19030 <HTML><HEAD></HEAD><BODY><P>This seems to be a split thread.&nbsp; The original thread may be found <A __default_attr="68542" class="jive_macro jive_macro_thread default_title" href="https://community.freescale.com/thread/68542" jivemacro="thread" title="here">here</A>.</P><P>&nbsp;</P><P>Mac</P><P>&nbsp;</P></BODY></HTML> Tue, 17 Aug 2010 23:23:41 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/Flash-memory/m-p/218458#M19030 bigmac 2010-08-17T23:23:41Z