How to upgrade Specify FW from SPI flash on nRF52 Series

This blog is to show how to use the SPI bootloader to load the specify firmware from SPI flash for device firmware upgrade. Following up the blog (SPI bootloader), I would continuous to use the nRF52840 DK board and use its onboard qspi flash as SPI flash. For example, there are 3 difference application firmware … Continue reading How to upgrade Specify FW from SPI flash on nRF52 Series

Overview on SPI Master / Slave on nRF52 Series

This blog describes how to use the SPI Master / Slave role on the nRF52 series. In general, there are 4 connection wired on the SPI interface. Chip Select (CS)Clock (SCK)MOSI (Master Output Slave Input)MISO (Master Input Slave Output) LCD Display Application For the LCD display application, the nRF52 acts as the SPI master role … Continue reading Overview on SPI Master / Slave on nRF52 Series