Content originally posted in LPCWare by Burkhard on Tue Jun 17 08:55:30 MST 2014 Dear programers,
I would like to use the LPC810M021FN8 for a new application. In order to save the state of the device before turning it off I save that state to the flash page which starts with the address 0xC00.
Here comes the problem: How do I read that value which is stored the flash address 0xC00?
Any easy to understand C code would be much appreciated!
Content originally posted in LPCWare by R2D2 on Sun Apr 12 15:10:46 MST 2015 Quote: bonds22 Here comes the problem: How do I read that value which is stored the flash address 0xC00?
memcpy
or a simple old-fashioned pointer:
uint32_t val;
uint32_t address= [color=#00f]type in your address here[/color];
val = (*(uint32_t*)address);
Content originally posted in LPCWare by bonds22 on Sun Apr 12 14:22:26 MST 2015 Here comes the problem: How do I read that value which is stored the flash address 0xC00?
Content originally posted in LPCWare by Helmut Stettmaier on Tue Jul 29 04:58:41 MST 2014 Hello Burkhard, To locate a parameter block into the flash memory and read it randomly I suggest to declare the structure of the block and place a variable of this structure at the location in flash as desired. This is done in 3 steps: - declare sthe structure as usual, - place a variable of this structure in a section, and - locate the section at the desired location This is code which currently works:
const __attribute__ ((section(".param_page"))) struct sParams {
uint8_tsize;///< size of this struct
// more stuff
int16_t altAlarm;///< Altitude (lower boundary) when an alarm shall be generated
} Params;
In the IDE click or select: Project|Properties|C/C++Build|Settings|MCU Linker|Miscellanous Add the linker control: --section-start=.param_page=0x3f80
This allows you to read any value, e.g. Params.altAlarm .
Content originally posted in LPCWare by starblue on Tue Jun 17 09:27:09 MST 2014 This is just part of the normal memory, so you can for example access it via a pointer, or use memcpy to copy it.
