Hi!
I'm trying to run KSDK examples on a TWR-KM34Z50M board. In fact there is no any helpful info about Z50M and the examples are for KM34Z75M. I've tried two examples "hello world" and "slcd_guessnum". Both of them were compiled and uploaded correctly without any warnings and errors in Kinetis Design Studio and also in Keil MDK (just to check uploading). But then nothing happens. For the "hello world" example there is nothing in PuTTY terminal (baudrate 115200 as specified in board.h). For the "slcd_guessnum" nothing appears on LCD.
Stepwise debugging after reset shows the following: the debug process always executes only three commands in a loop from startup_MKM34Z7.s (marked in bold)
Reset_Handler PROC
EXPORT Reset_Handler [WEAK]
IMPORT SystemInit
IMPORT init_data_bss
IMPORT __main
IF :LNOT::DEF:RAM_TARGET
REQUIRE FlashConfig
ENDIF
CPSID I ; Mask interrupts
LDR R0, =SystemInit
BLX R0
LDR R0, =init_data_bss
BLX R0
CPSIE i ; Unmask interrupts
LDR R0, =__main
BX R0
ENDP
In a function SystemInit() only one line is executed (marked in bold)
void SystemInit (void) {
#if (DISABLE_WDOG)
/* WDOG->UNLOCK: WDOGUNLOCK=0xC520 */
WDOG->UNLOCK = WDOG_UNLOCK_WDOGUNLOCK(0xC520); /* Key 1 */
/* WDOG->UNLOCK: WDOGUNLOCK=0xD928 */
WDOG->UNLOCK = WDOG_UNLOCK_WDOGUNLOCK(0xD928); /* Key 2 */
/* WDOG->STCTRLH: ?=0,DISTESTWDOG=0,BYTESEL=0,TESTSEL=0,TESTWDOG=0,?=0,?=1,STOPEN=1,DBGEN=0,ALLOWUPDATE=1,WINEN=0,IRQRSTEN=0,CLKSRC=1,WDOGEN=0 */
WDOG->STCTRLH = WDOG_STCTRLH_BYTESEL(0x00) |
WDOG_STCTRLH_STOPEN_MASK |
WDOG_STCTRLH_ALLOWUPDATE_MASK |
WDOG_STCTRLH_CLKSRC_MASK |
0x0100U;
#endif /* (DISABLE_WDOG) */
If try to skip lines for SystemInit() obviously everything is stuck at the last line in Reset_Handler.
I guess the issue is connected to the difference between MKM34Z50 and MKM34Z75 but I have no idea what to change. I'd appreciate any suggestions. Thanks!
