I have a project for our custom hardware using the RL78/L13 (R5F10WLEAFB - 64k Flash, 4k RAM). I am using E2STUDIO V6.0 and I have installed the CC-RL_V10500 compiler.
Initially, I have been using the GCC compiler, but with my code growing, I had linker issues even with optimization and so I have moved to using the CC-RL compiler.
I created a new project, used code generator and adding my application files from the GCC project. So, pretty much, the source code is identical except for CC-RL specifics. The code compiles fine and I am running the hardware debug configuration on the target. The problem is that the board reboots repeatedly. The code runs to a point and resets.
I have a set the option bytes as follows: 6effaa84
I have also set IAWCTL = 0x00U;
Since hitting the issue, I have reverted to a more simpler project, which retains all the code generator code with some of my user defined functions for the UART1, and in my main() function, I simply print some text on UART1. This works fine. When I introduce more code, to detect a keypad keypress, I get some unexplained behavior where a function that checks if a key was pressed returns the key pressed or 0xFF if a key was not pressed. This is done by initializing a local variable to 0xFF and changing it to the value of the key pressed and returning this variable. I seem to always get 0x00 returned, when no key is pressed. Anway, after running this code in while loop for some time, the board just resets. This is just one part of the problem.
If I introduce more code, before the key detection and the while loop, where I am using the CSI0 port to write to registers on a transciever chip on the board, again, I hit issues with board resetting when R_CSI00_Send_Receive() is called.
Bear in mind that the equivalent simpler project, when compiled and run using the GCC compiler works perfectly fine. We also have a license for the IAR compiler. I created another project using IAR and, as with the GCC compiler, I can run the build fine on the target.
My conclusion is there must be some differences in the compiler settings. At the moment, I am running the CC-RL without any compiler or linker optimization. Could there be some invalid memory access?
Where do I start with debugging this issue? I need some pointers.
Sudesh, How is your project progressing? It sounds like your WDT might be the cause. Have you had any luck? Mike Clements RenesasRulz Moderator
I've experienced the reboot again today. Both the RESF and PORSR registers are 0. I am reading and printing these out in my main() function. I have also set PORF bit in the PORSR register to 1 in R_Systeminit(). I am reading these registers once in the R_CGC_Get_ResetSource() function and storing them in a global variable, which I then print on the uart in main().
I was hoping to see at least 1 of the bits in the RESF register set to 1. But each time the board reboots, the register is always zero. The reboot occurs in the main() after R_MAIN_UserInit() is called and after some additional peripherals and application specific functions.
In the R_MAIN_UserInit(), I am intializing some port pins that control the peripherals, turn on the LCD Voltage, initialize UART1 for receiving and then start the uart. I also call R_CSI00_Start() and finally EI() to enable interrupts. I then initialize the RF front end (radio) connected to CSI00 and call v_LCD_Start()/
I then print out the variables storing RESF and PORSR registers and my application version on the uart. The reboot always occurs in the middle of printing out one of the lines of debug.
The debug prints are as follows (using macros):
DEBUG_DEBUG("Reset Status Register: 0x%x\n\r", uc_reset_flag);
DEBUG_DEBUG("POR Status Register: 0x%x\n\r", uc_porsr_flag);
/* Print Firmware Version Info */
DEBUG_INFO("Version: %s\n\r", FIRMWARE_VERSION);
The DEBUG_DEBUG macro, prepends "[DEBUG]" to the output string and the DEBUG_INFO macro prepends "[INFO]".
On my uart log capture, I see the following output:
[DEBUG]Reset Status Register: 0x0[DEBUG]POR Status Register: 0x0[INFO]Intelli-Meters Comet[INFO] ---> reboot happens here
This pattern repeats itself over and over. The reboots always occurs at the same point.
Any other ideas on the debugging this further.
PS: Running through the debugger, there is no reboot.