Hello everyone,
I'm working on a project with nRF9160 and I used to this code to test the erase protection. But I found that the value of the "ERASEPROTECT->DISABLE" register does not match.
#include <zephyr.h>
void main(void)
{
NRF_NVMC->CONFIG = ( (NVMC_CONFIG_WEN_Wen | NVMC_CONFIG_WEN_Een) << NVMC_CONFIG_WEN_Pos);
while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
{ }
NRF_CTRL_AP_PERI_S->ERASEPROTECT.LOCK = 0x00000000;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
{ }
NRF_UICR->APPROTECT = 0x00000000;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
{ }
NRF_UICR->ERASEPROTECT = 0x00000000;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
{ }
NRF_CTRL_AP_PERI_S->ERASEPROTECT.DISABLE = 0xDEADBEEF;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
{ }
printk("Before Write Key.\n");
printk("ERASEPROTECT Addr 0x%X\n", &NRF_CTRL_AP_PERI_S->ERASEPROTECT.LOCK);
printk("ERASEPROTECT 0x%X\n", NRF_UICR->ERASEPROTECT);
printk("ERASEPROTECT.LOCK 0x%X\n", NRF_CTRL_AP_PERI_S->ERASEPROTECT.LOCK);
printk("ERASEPROTECT.DISABLE 0x%X\n", NRF_CTRL_AP_PERI_S->ERASEPROTECT.DISABLE);
uint32_t count = 0;
while (1)
{
k_msleep(1000);
printk("Count:: %u\r\n", count++);
}
} /* main */
Command to build this code:
$ west build -b nrf9160dk_nrf9160 .
My result on UART terminal.
*** Booting Zephyr OS build v3.0.99-ncs1 ***
Begin Unlock.
Before Write Key.
ERASEPROTECT Addr 0x50006500
ERASEPROTECT 0x0
ERASEPROTECT.LOCK 0x0
ERASEPROTECT.DISABLE 0x0
And then I try to write the value to "ERASEPROTECT->DISABLE" as the same c-code using this script.
setPassword.txt
SWDSelect SWDWriteDP 1 0x50000000 SWDWriteDP 2 0x04000010 SWDWriteAP 3 0xDEADBEEF sleep 10000 SWDWriteDP 1 0x50000000 SWDWriteDP 2 0x04000000 SWDWriteAP 0 0x00000001 SWDReadAP 0 SWDReadAP 0 sleep 5000 SWDWriteAP 0 0x00000000 SWDReadAP 0 SWDReadAP 0 sleep 1000 exit
Command to run script
$ JLinkExe -Commandfile setPassword.jlink
The result:
SEGGER J-Link Commander V7.80c (Compiled Sep 27 2022 16:06:19) DLL version V7.80c, compiled Sep 27 2022 16:05:56 J-Link Command File read successfully. Processing script file... J-Link>SWDSelect J-Link connection not established yet but required for command. Connecting to J-Link via USB...O.K. Firmware: J-Link Ultra V5-1 compiled Sep 22 2022 14:54:27 Hardware version: V5.10 J-Link uptime (since boot): 0d 00h 13m 13s S/N: 505101964 License(s): RDI, FlashBP, FlashDL, JFlash, GDB USB speed mode: High speed (480 MBit/s) VTref=3.270V Select SWD by sending SWD switching sequence. Found SWD-DP with ID 0x6BA02477 J-Link>SWDWriteDP 1 0x50000000 Write DP register 1 = 0x50000000 J-Link>SWDWriteDP 2 0x04000010 Write DP register 2 = 0x04000010 J-Link>SWDWriteAP 3 0xDEADBEEF Write AP register 3 = 0xDEADBEEF J-Link>sleep 10000 Sleep(10000) J-Link>SWDWriteDP 1 0x50000000 Write DP register 1 = 0x50000000 J-Link>SWDWriteDP 2 0x04000000 Write DP register 2 = 0x04000000 J-Link>SWDWriteAP 0 0x00000001 Write AP register 0 = 0x00000001 J-Link>SWDReadAP 0 Read AP register 0 = 0x00000000 J-Link>SWDReadAP 0 Read AP register 0 = 0x00000001 J-Link>sleep 5000 Sleep(5000) J-Link>SWDWriteAP 0 0x00000000 Write AP register 0 = 0x00000000 J-Link>SWDReadAP 0 Read AP register 0 = 0x00000001 J-Link>SWDReadAP 0 Read AP register 0 = 0x00000000 J-Link>sleep 1000 Sleep(1000) J-Link>exit Script processing completed.
I found my board can't disable erase protection and I can't recover it.
Helpful hints Exactly what is happening?
Best regards
Wasan
