Read/write simple example
tonialomar opened this issue · comments
Hello,
I just want to do the following:
Before I power off device save to a variable let's say value 0x69
Once the device wakes up I want to read the exact same address and read the content to modify it.
How can I do it?
I don't understand any of the examples.. what are the pages?
Any help would be appreciated.
Toni
Hello Toni,
this library hides complexity of managing flash pages i a manner to allow a lot of writes like eeprom. You can ignore pages and nvram and use the eeprom emulation layer.
To read and write only one Byte, you can use "eeprom_write_byte(0, 0x69)" and "eeprom_read_byte(0)"
If your structure is logner than a byte, you can use eeprom_write_block(&vour_variable, 0, sizeof(your_variable)) and eeprom_read_block(&your_variable, 1, sizeof(your_variable));
If you want to have more control for time critical implementations, you can use the NVRAM class. The NVRAM-Class allows to control page cleanup, which can block for up to 5 seconds (nrf51).