How to add spis example in Secure DFU ble example

[Akshay19]

Hi Nordic Team,

                         I was doing OTA in nrf52840 using Secure DFU ble example in nrf5 sdk. Where i want add some customizations in the code.

1.I wanted to add spis example to secure dfu ble example.to send date to another ic. it is working perfectly fine when using spis example .but when i add the spis slave example to secure dfu 

code it is not working.(on stm32(other chip) side it is giving 0xffff data. but it was working fine with spis example)

2.how can we add a spis peripheral example to secure dfu.

pls help

[Vidar Berg]

Hello,

Are you already enabling the constant latency power mode like in the SPIS example? This mode makes the SPIS wakeup shorter so you don't have to assert the CSN line as early.

int main(void)
{
    // Enable the constant latency sub power mode to minimize the time it takes
    // for the SPIS peripheral to become active after the CSN line is asserted
    // (when the CPU is in sleep mode).
    NRF_POWER->TASKS_CONSTLAT = 1;
    ...

Note: the SPIS should be unitialized and the sub-power mode should be set to low power before booting the main app.

Best regards,

Vidar

[Akshay19]

yes it is working now but i want to transfer mac id of nrf to stm. Im using the lines of code to do that

ble_gap_addr_t ble_addr;
sd_ble_gap_addr_get(&ble_addr);

but when i call that im only getting 2,3,0,0,0,0,

as mac id

i call the before and after spi int

but result is same 

1. where should we call this code to get the correct mac id

[Akshay19]

mac id is F7:FB:53:21:22:34

[Akshay19]

if (dfu_enter)
{

nrf_bootloader_wdt_init();
scheduler_init();
//dfu_enter_flags_clear();
gpio_init();
ble_gap_addr_t mac_addr;
sd_ble_gap_addr_get(&mac_addr);
tx_buf[0]=0x11;
tx_buf[1]=0x22;
tx_buf[2]=mac_addr.addr[0];
tx_buf[3]=mac_addr.addr[1];
tx_buf[4]=mac_addr.addr[2];
tx_buf[5]=mac_addr.addr[3];
tx_buf[6]=mac_addr.addr[4];
tx_buf[7]=mac_addr.addr[5];
tx_buf[8]=0x44;
tx_buf[9]=0x55;
spi_Init();

[Vidar Berg]

This call must be made after the Softdevice has been enabled by nrf_bootloader.c::nrf_dfu_init(). I also recommend you validate the return code:

uint32_t err_code = sd_ble_gap_addr_get(&ble_addr);

APP_ERROR_CHECK(err_code) // invoke error handler if err_code != NRF_SUCCESS