MSPM0G3107: Manually enable MSPM0G3107 readout protection from MCU application code

Hi Mykolat,

Mykola Zaitsev said:

But when I try to read that data

with a pointer, it gives NMI.

Please check what triggers NMI? You can find the trigger source:

And where the address you read?

B.R.

Sal

By the way, what readout function you want to use? Can you show how you configure you NVM here?

B.R.

Sal

Hi Thanks for your reply. I can check more precisely what triggers it tomorrow and reply here.

Here is a snippet of what I am trying to do: 

// structs generated by sysconfig with some debug port restrictions
extern const BCR_Config BCRConfig;
extern const BSL_Config BSLConfig;

#define BCR_CONFIG_ADDR 0x41C00000

BCR_Config bcr_read = {0};
memcpy(&bcr_read, (uint8_t*)BCR_CONFIG_ADDR, sizeof(BCR_Config));

if(memcmp(&BCRConfig, &bcr_read, sizeof(BCR_Config)) == 0) {
LOG_DBG("BCRConfig matches");
return;
}

// At this point I am sure that BCR config is not what it should be, so I try to modify it

DL_FlashCTL_unprotectSector(FLASHCTL, BCR_CONFIG_ADDR, FLASHCTL_CMDCTL_REGIONSEL_NONMAIN);

if (!DL_FlashCTL_waitForCmdDone(FLASHCTL)) {
LOG_DBG("Unprotect sector error");
return;
}

DL_FlashCTL_eraseMemory(FLASHCTL, BCR_CONFIG_ADDR, FLASHCTL_CMDTYPE_SIZE_SECTOR);

if (!DL_FlashCTL_waitForCmdDone(FLASHCTL)) {
LOG_DBG("Sector erase error");
return;
}

ret = DL_FlashCTL_programMemoryBlocking(FLASHCTL,BSL_CONFIG_ADDR, (uint32_t *)&BCRConfig, sizeof(BSL_Config), FLASHCTL_CMDCTL_REGIONSEL_NONMAIN);

LOG_DBG("Flash program ret: %d", ret);

At this point I expect that BCR data is updated. So I proceed to check with the same command as before: 

if(memcmp(&BCRConfig, (uint8_t*)BCR_CONFIG_ADDR, sizeof(BCR_Config)) == 0) {
LOG_DBG("BCRConfig matches");
return;
}

However, this time trying to access data in BCR_CONFIG_ADDR region triggers NMI (I suspect it is bus error or flash error).

I would repeat the same for BSL as well and protect the sector, except I do not get here cause I am in error handler.

I am not sure if this approach is valid at all. It's not clear from documentation if something like this is allowed or not.

Here are configs themselfs:

const BCR_Config BCRConfig =
{
.bcrConfigID = 0x1,
.debugAccess = BCR_CFG_DEBUG_ACCESS_DIS,
.swdpMode = BCR_CFG_SWDP_EN,
.tifaMode = BCR_CFG_TIFA_DIS,
.bslPinInvokeEnable = BCR_CFG_BSL_PIN_INVOKE_DIS,
.passwordDebugLock = {CFG_DEFAULT_VALUE, CFG_DEFAULT_VALUE,
CFG_DEFAULT_VALUE, CFG_DEFAULT_VALUE},
.fastBootMode = BCR_CFG_FAST_BOOT_DIS,
.bootloaderMode = BCR_CFG_BOOTLOADER_MODE_DIS,
.massEraseMode = BCR_CFG_MASS_ERASE_EN,
.factoryResetMode = BCR_CFG_FACTORY_RESET_EN,
.passwordMassErase = {CFG_DEFAULT_VALUE, CFG_DEFAULT_VALUE,
CFG_DEFAULT_VALUE, CFG_DEFAULT_VALUE},
.passwordFactoryReset = {CFG_DEFAULT_VALUE, CFG_DEFAULT_VALUE,
CFG_DEFAULT_VALUE, CFG_DEFAULT_VALUE},
.staticWriteProtectionMainLow = CFG_DEFAULT_VALUE,
.staticWriteProtectionMainHigh = CFG_DEFAULT_VALUE,
.staticWriteProtectionNonMain = BCR_CFG_NON_MAIN_STATIC_PROT_DIS,
.secureBootMode = BCR_CFG_SECURE_BOOT_DIS,
.userSecureAppStartAddr = CFG_DEFAULT_VALUE,
.userSecureAppLength = CFG_DEFAULT_VALUE,
.userSecureAppCrc = CFG_DEFAULT_VALUE,
.userCfgCRC = 0xc629ebd0,
};

const BSL_Config BSLConfig =
{
.configID = 0x1,
.interfacePins.UART_RXD_pad_num = DEF_UART_RXD_PAD,
.interfacePins.UART_RXD_PF_mux_sel = DEF_UART_RXD_MUX,
.interfacePins.UART_TXD_pad_num = DEF_UART_TXD_PAD,
.interfacePins.UART_TXD_PF_mux_sel = DEF_UART_TXD_MUX,
.interfacePins.I2C_SDA_pad_num = DEF_I2C_SDA_PAD,
.interfacePins.I2C_SDA_PF_mux_sel = DEF_I2C_SDA_MUX,
.interfacePins.I2C_SCL_pad_num = DEF_I2C_SCL_PAD,
.interfacePins.I2C_SCL_PF_mux_sel = DEF_I2C_SCL_MUX,
.pin.pinData0 = DEFAULT_BSL_PIN_INVOCATION_DATA0,
.pin.pinData1 = DEFAULT_BSL_PIN_INVOCATION_DATA1,
.memoryRead = BSL_CFG_MEMORY_READOUT_DISABLE,
.password = {CFG_DEFAULT_VALUE, CFG_DEFAULT_VALUE,
CFG_DEFAULT_VALUE, CFG_DEFAULT_VALUE, CFG_DEFAULT_VALUE,
CFG_DEFAULT_VALUE, CFG_DEFAULT_VALUE, CFG_DEFAULT_VALUE},
.pluginType = BSL_CFG_PLUGIN_TYPE_ANY,
.flashPluginEnable = BSL_CFG_PLUGIN_FLASH_NOT_EXIST,
.pluginSramSize = 0xff,
.pluginHook[0] = CFG_DEFAULT_VALUE,
.pluginHook[1] = CFG_DEFAULT_VALUE,
.pluginHook[2] = CFG_DEFAULT_VALUE,
.pluginHook[3] = CFG_DEFAULT_VALUE,
.BSLAlternateConfig = BSL_CFG_FLASH_BSL_NOT_EXIST,
.reserved = 0xFFFF,
.BSLAlternateAddr = CFG_DEFAULT_VALUE,
.appRev = (uint32_t *) CFG_DEFAULT_VALUE,
.securityAlert = BSL_CFG_SECURITY_IGNORE,
.i2cSlaveAddress = 0x48,
.userCfgCRC = 0xf7df416,
};

Hi Mykolat,

I'll check your configuration later this week.

What the NMI you triggered?

B.R.

Sal