Occur Default handler when start Init Uart

noahkwon — Fri, 17 Jul 2015 09:34:15 GMT

hi, guys. I'm begginer in freescale.

actually, I didn't even know that what the problem is in this code.

I think that is default handler.

when I was coding for uart driver I got a problem about default handler.

Maybe I know that picture of bottom is occured exception and next bottom is main code.

I already got many solutions for this issue on this community. but, I couldn't do that

I guess that issue is related Clock Gating.. whatever

this board is FRDM-K64F

nobody know that issue... TT so, if anybody know that problem.... help me...

thank you.

Noah.

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#include "Cpu.h"
#include "Events.h"
#include "clockMan1.h"
#include "pin_init.h"
#include "osa1.h"

#include "Drv_UART.h"
#if CPU_INIT_CONFIG
#include "Init_Config.h"
#endif

#define REG_RW(x) (volatile uint32_t *)(x)

int main(void)
{
PE_low_level_init();

Init_Uart(4,50000000,115200);

     #ifdef PEX_RTOS_START
      PEX_RTOS_START();
      #endif

for(;;){}

}

void Init_Uart(char ch ,int SysClk, int Baud)
{

int mReg,ubd;

*REG_RW(SIM_SCGC1) |= 0x1 << 10; // Enable the clock to the selected UART

     mReg = *REG_RW(UART4_C2);                                                          // Tx, Rx are disabled
      mReg = (mReg & ~(0x1 << 2)) | (0x0 << 2);
      mReg = (mReg & ~(0x1 << 3)) | (0x0 << 3);
      *REG_RW(UART4_C2) = mReg;

*REG_RW(UART4_C1) = 0; // all default settings

ubd = (uint32_t)((SysClk)/(Baud*16)); // Calculate Baud Settings

     mReg = *REG_RW(UART4_BDH);
      *REG_RW(UART4_BDH) = (mReg & ~(0x1F << 0)) | (ubd >> 8);       // BDH
      *REG_RW(UART4_BDL) = (uint8_t)(ubd & 0xff);                                // BDL

     mReg = *REG_RW(UART4_C4);                                                        // BRFA
      mReg = (mReg & ~(0x1F << 0)) | (0x1 << 2);
      *REG_RW(UART4_C4) = mReg;

     mReg = *REG_RW(UART4_C2);                                                         // Tx, Rx are enabled
      mReg = (mReg & ~(0x1 << 2)) | (0x1 << 2);
      mReg = (mReg & ~(0x1 << 3)) | (0x1 << 3);
      *REG_RW(UART4_C2) = mReg;

     mReg = *REG_RW(UART4_S2);                                                           // Most Significant Bit First
      mReg = (mReg & ~(0x1 << 5)) | (0x0 << 0);
      *REG_RW(UART4_S2) = mReg;
}

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Re: Occur Default handler when start Init Uart

Alice_Yang — Mon, 20 Jul 2015 08:29:50 GMT

Hello noah,

(1) Form your picture , i see you use KDS and KSDK, please tell me the version of KDS and SDK .

(2) IN you code, i see when initialize the UART component , you sue the code by yourself , and in the KSDK driver , there have

UART_DRV_Init , you can directly use , and under the SDK install directory , there are some UART demo , you can refer to :

...Freescale\KSDK_1.2.0\examples\frdmk64f\driver_examples\uart

(3) Also you can use the Processor Expert , directly add UART component , then configure , then it can generate code

(4) If you still want to know why is wrong about your code , please send your project to me , i will test it on my side .

Hope it helps

Have a great day,
Alice

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Occur Default handler when start Init Uart

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