We are interfacing serial flash using SPI interface and use nordic nrf52 nrf_drv_spi.c as the library.
We have taken a look at nrf_drv_spi.c, and it seems in the api nrf_drv_spi_transfer(… , … , … , uint8_t * p_rx_buffer, uin8_t rx_buffer_length), could only take up to 255 since rx_buffer_length is defined as uint8_t.
Actually our concern is primarily on battery consumption. We would like to achieve 1page of data (256bytes) per write between nordic MCU to our external flash. However we are only achieving around 48 bytes per write. This results in higher frequency of write between the MCU and the external flash, which will result in higher battery consumption, as mentioned below:
SPI flash should be written / read in 1 page (of 256 Bytes), partial write / read (less than a page) can have unnecessary power consumption and time processing.
Do you have any solution on this? or is this the limitation for nordic spi buffer?
