Simple Startup Routine using EEPROM: FRDM-K22F

briancavanagh — Wed, 29 Nov 2017 18:40:13 GMT

Hi, without going into a lot of details, I'm trying to figure out how to write a routine that resembles the flow chart below.

I have one button connected to my circuit board that is used to turn-on and/or turn-off the power.

After the button is held down for 2 seconds I would like the routine to read EEPROM and determine if the value is "0". This would indicated the unit was previously off, as a result, write a "1" to eeprom. Conversely, if the value is "1", the unit was previously on, write a "0" to eeprom.

Note, the circuitry is configured in such a way that when the button is pressed it will energize the uC immediately so this routine can be carried out. (If the uC is already on, the routine will be triggered). I do have an "power enable pin" on the LDO that I will set depending on the reading from EEPROM (I believe with the K22F uC, this is called NVM?)

Thanks,

Brian

Re: Simple Startup Routine using EEPROM: FRDM-K22F

jingpan — Thu, 30 Nov 2017 06:13:21 GMT

Hi Brian,

The main chip on FRDM-K22F is K22FN512VLH12 or K22FN128VLH10. They don't support FlexMemory function. It means they haven't eeprom function.

Regards

Jing

Re: Simple Startup Routine using EEPROM: FRDM-K22F

briancavanagh — Thu, 30 Nov 2017 17:53:14 GMT

Hi Jing,

Thanks for helping.

Brian

Kinetis MicrocontrollersのトピックRe: Simple Startup Routine using EEPROM: FRDM-K22F

Simple Startup Routine using EEPROM: FRDM-K22F

Re: Simple Startup Routine using EEPROM: FRDM-K22F

Re: Simple Startup Routine using EEPROM: FRDM-K22F