Hello,
I am trying to create a test application to restrict JTAG/debug access by setting a 16 byte password (without HSE) for an S32K312. Previously my approach was 2 staged - I had one program to set the password, and another to advance the lifecycle, and this seemingly worked fine.
I am now trying to combine both into a single sequence to integrate into my main application eventually, but I am facing issues where the MCU generates a hardfault when I try to program the password.
I can confirm that before trying to program the password, there is no password set (0xFF throughout) and even though a hardfault was generated, the password has actually been programmed - this must have been why my previous 2 staged approach worked, as even if the first stage hardfaulted, I would not have noticed and simply programmed the second stage.
Below is my code snippet. Do note that I have also set the lifecycle configuration word address in the startup script, to be included in the IVT. There are no other modifications to the startup script or linker.
#define MASTER_ID (0U)
#define CUST_DB_PSWD_A_ADDR (0x1B000080U)
#define CUST_DB_PSWD_A_SECTOR (C40_UTEST_ARRAY_0_S000)
#define CUST_DB_PSWD_A_LENGTH (16U)
#define LC_CONFIGURATION_WORD_ADDR (0x005A6000)
#define LC_CONFIGURATION_WORD_SECTOR (C40_CODE_ARRAY_0_BLOCK_1_S211)
#define LC_CONFIGURATION_WORD_LENGTH (8U)
uint8_t cust_db_pswd_a[CUST_DB_PSWD_A_LENGTH] __attribute__((aligned(4)))
= { 0x35, 0x2E, 0x04, 0x92, 0x65, 0x25, 0x09, 0x23, 0x35, 0x2E, 0x04, 0x92,
0x65, 0x25, 0x09, 0x23 };
uint8_t lc_configuration_word[LC_CONFIGURATION_WORD_LENGTH] __attribute__((aligned(4)))
= { 0xBA, 0xBA, 0xBA, 0xBA, 0x0, 0x0, 0x0, 0x0 }; /* Minimum data length 8 bytes */
int main(void) {
Clock_Ip_Init(&Clock_Ip_aClockConfig[0]);
C40_Ip_Init(&C40_Ip_InitCfg);
/* PROGRAMMING ADKP */
if (C40_Ip_GetLock(CUST_DB_PSWD_A_SECTOR)
== C40_IP_STATUS_SECTOR_PROTECTED) {
C40_Ip_ClearLock(CUST_DB_PSWD_A_SECTOR, MASTER_ID);
}
C40_Ip_MainInterfaceWrite(CUST_DB_PSWD_A_ADDR, CUST_DB_PSWD_A_LENGTH,
cust_db_pswd_a, MASTER_ID); /* Hardfaults here, but UTEST program is actually successful */
while (C40_Ip_MainInterfaceWriteStatus() == C40_IP_STATUS_BUSY)
;
/* ADVANCING LC */
if (C40_Ip_GetLock(LC_CONFIGURATION_WORD_SECTOR)
== C40_IP_STATUS_SECTOR_PROTECTED) {
C40_Ip_ClearLock(LC_CONFIGURATION_WORD_SECTOR, MASTER_ID);
}
C40_Ip_MainInterfaceSectorErase(LC_CONFIGURATION_WORD_SECTOR,
MASTER_ID);
while (C40_Ip_MainInterfaceSectorEraseStatus() == C40_IP_STATUS_BUSY)
;
C40_Ip_MainInterfaceWrite(LC_CONFIGURATION_WORD_ADDR,
LC_CONFIGURATION_WORD_LENGTH, lc_configuration_word, MASTER_ID);
while (C40_Ip_MainInterfaceWriteStatus() == C40_IP_STATUS_BUSY)
;
while (true)
;
return 0U;
}
my .mex configuration is as such -
Any inputs as to what I am doing wrong?
With regards,
Hareesh S
