nrf connect sdk add custom section(UICR)

RE: nrf connect sdk add custom section(UICR)

s0872x7 — Wed, 28 Jul 2021 18:16:25 GMT

Finally I have wrote this code.

It works very well.

    // Write UICR's REGOUT0 register to given value
    #if ( CONFIG_NRF52_ENABLE_DCDC == 1 )  
        if ( NRF_UICR->REGOUT0 != (uint32_t)CONFIG_NRF52_DCDC_REGOUT_VALUE ) {
        
            nrfx_err_t err = NRFX_SUCCESS;
        
            NRF_UICR_Type tmp;
            memcpy( &tmp, NRF_UICR, sizeof(NRF_UICR_Type) );
            
            tmp.REGOUT0 = (uint32_t)CONFIG_NRF52_DCDC_REGOUT_VALUE;
            
            err = nrfx_nvmc_uicr_erase( );
            __ASSERT( (err == NRFX_SUCCESS), "NVMC erase UICR failed" );
            
            nrfx_nvmc_bytes_write( NRF_UICR_BASE, &tmp, sizeof(NRF_UICR_Type) );
            while ( nrfx_nvmc_write_done_check() != true );
            
            LOG_INF( "REGOUT0 writed to %u", CONFIG_NRF52_DCDC_REGOUT_VALUE );
        
        }    
    #endif

RE: nrf connect sdk add custom section(UICR)

Susheel Nuguru — Tue, 06 Jul 2021 06:47:46 GMT

If writing to UICR is the thing you are trying to achieve then probably SOC_FLASH_NRF_UICR is your helper feature. You do not need any additional linker scripts when you enable this feature. You can write to this register as a normal flash write.

RE: nrf connect sdk add custom section(UICR)

s0872x7 — Thu, 01 Jul 2021 15:30:42 GMT

Is there an any example?

I don't know how to write a linker script.

Also in my research, add a custom linker script should rewrite the whole sections. and I dont want to do that.

* All I want is change REGOUT0 value to change the gpip reference voltage. and I dont care about the method.

RE: nrf connect sdk add custom section(UICR)

Susheel Nuguru — Thu, 01 Jul 2021 11:40:03 GMT

[quote user=""]I want to add a UICR section. but I don't know how to add a custom section in ncs(also zephyr).[/quote]

You need to have a linker script (*.ld for gcc)Where you create a MEMORY section and define that section in SECTIONS of the linker script. Once you have that linker script you can include your custom linker scripts using this define.

[quote user=""]Also I want to know how to change UICR REGOUT0 register value in ncs(also zephyr).[/quote]

UICR registers are not designed to be edited/changed after writing one value to the register. You need to erase the whole flash to be able to rewrite to UICR registers.