need clarification of pstorage

[Satheeshkumar]

sd_flash_write(((uint32_t *)storage_addr), (uint32_t *)p_data_addr, size / sizeof(uint32_t));

why here size value is divided by sizeof(uint32_t).

what is byte value of uint32_t.is it 4 byte?. i searched in stdint.h file there has use int only.

uint32_t byte value is 4 byte or 2 byte?

thanks,

[Moritz]

As for the size i think this is because size has to be: Number of 32-bit words to write. Maximum size is 256 32-bit words for nRF51 and 1024 for nRF52. infocenter.nordicsemi.com/.../group___n_r_f___s_o_c___f_u_n_c_t_i_o_n_s.html

You get this number by dividing the size by the size of an uint32_t (32bit)

[Satheeshkumar]

uint32_t range is 4 byte. i need to know why "size / sizeof(uint32_t)" it need in the write function. if i gave 50 means. the will write 50 byte data into the memory right? then why need to divide?

[emdi]

The parameter to sd_flash_write() is expressed in number of 4 byte words. The paramter 'size' is divided by the size of a word because it is expressed in bytes.

[Hung Bui]

@satheesh: Please read the documentation. It clearly stated that the size provided as input for the function is: "Number of 32-bit words to write. Maximum size is 256 32bit words for nRF51 and 1024 for nRF52."

So if you provide 50 that mean it's 50 words = 200 bytes