I2C Slave plus Hardware timer in FRDM-K64F

[viniciusmaciel]

Hi,

I have a FRDM-K64F kit and I'm using Kinetis Design Studio 2.0 with Kinetis SDK 1.1.0

I'm trying to attach examples i2c_comm + hwtimer_demo, but there is a problem with hardware timer initialization. When I call the function HWTIMER_SYS_Init(), the firmware gets stuck.

int main(void) {     i2c_slave_state_t slave;       i2cData_t i2cData =     {       .subAddress = Invalid_Subaddress_Index,       .data = 0,       .state = CMD_MODE     };       i2c_slave_user_config_t userConfig =     {         .address = 0x3A,         .slaveListening = true,         .slaveCallback  = i2c_slave_event_callback_passive,         .callbackParam  = &i2cData, #if FSL_FEATURE_I2C_HAS_START_STOP_DETECT         .startStopDetect  = false, #endif #if FSL_FEATURE_I2C_HAS_STOP_DETECT         .stopDetect       = false, #endif     };       // Low Power Configuration     smc_power_mode_config_t smcConfig;     smc_power_mode_protection_config_t smcProtConfig;       // Init struct     memset(&smcConfig, 0, sizeof(smcConfig));     memset(&smcProtConfig, 0, sizeof(smcProtConfig));       hardware_init();     dbg_uart_init();     configure_i2c_pins(BOARD_I2C_COMM_INSTANCE);     OSA_Init();     GPIO_DRV_Init(0, ledPins);       // Initiate I2C instance module     I2C_DRV_SlaveInit(BOARD_I2C_COMM_INSTANCE, &userConfig, &slave);       printf("\r\n====== I2C Slave ======\r\n\r\n");       // turn LED_slave on to indicate I2C slave status is waiting for date receiving     LED_turnon_slave();     LED_turnoff_master();     //OSA_TimeDelay(50);       printf("\r\n I2C slave enters low power mode...\r\n");    // Hwtimer initialization   if (kHwtimerSuccess != HWTIMER_SYS_Init(&hwtimer, &HWTIMER_LL_DEVIF, HWTIMER_LL_ID, 5, NULL))   {   printf("\r\nError: hwtimer initialization.\r\n");   }   if (kHwtimerSuccess != HWTIMER_SYS_SetPeriod(&hwtimer, HWTIMER_LL_SRCCLK, HWTIMER_PERIOD))   {   printf("\r\nError: hwtimer set period.\r\n");   }   if (kHwtimerSuccess != HWTIMER_SYS_RegisterCallback(&hwtimer, hwtimer_callback, NULL))   {   printf("\r\nError: hwtimer callback registration.\r\n");   }   if (kHwtimerSuccess != HWTIMER_SYS_Start(&hwtimer))   {   printf("\r\nError: hwtimer start.\r\n");   }           // LED_slave is still on during low power mode until I2C master send data to slave.     // Turn off LED_slave to indicate MCU wake up by I2C address matching interrupt     LED_turnoff_slave();     //printf("\r\n I2C slave wakes up from low power mode by I2C address matching.\r\n");     printf("Initialization OK\n");       while(1)     {     } }

[viniciusmaciel]

Hi,

More information that may help. Here is debugger trace function:

The firmware gets stuck here:

DefaultISR:
    b DefaultISR
    .size DefaultISR, . - DefaultISR

[viniciusmaciel]

Hi,

I have found that others have the same problem with ​WDOG_EWM_IRQHandler ():

https://community.freescale.com/thread/344647

https://community.freescale.com/thread/353329

It seems be "Buggy startup code perhaps", startup_MK64F12.S.

[DavidS]

Hi Vinicius,

I think the root cause of the exception is that the code wants Vector Table in RAM but it is in Flash.

As I stepped through your code it dies at following line in fsl_interrupt_manager.c INT_SYS_InstallHandler() function:

__VECTOR_RAM[irqNumber + 16] = (uint32_t)handler;

//DES this code assumes vector table in RAM so if it is in flash an exception occurs when it tries to write to flash space.

Will look into this further but wanted to give you update.

Regards,

David

[jasonscott]

Hey David,

Was a solution ever found for this?

-Jason

[DavidS · Accepted solution]

Hi Jason,

Short answer: no.

Longer answer: never heard back from others if my suggestion resolved issue or if they found another solution.  Without feedback I didn't anything else on this topic.

The KDS and KSDK referenced are very old have had several major updates.  KDS_3.2...KSDK_v2.

They most likely have resolved whatever the issue.

Regards,

David

[jasonscott]

Thanks for your response David!

-Jason

[giacomopetrini]

It seems that the CPU called an interrupt, but the corresponding ISR is not set.

Verify that you have a function for every interrupt you have enabled.

Best Regards

Giacomo

[Alice_Yang]

Hello ,

I have test the "i2c_comm_slave_frdmk64" demo on my side ,it can work well .How about on your side .

On you project , where be mainly changed ?

I have suggestion:

(1) delete the ".matadate"  under workspace, then build , then test .

(2) Please trace into the function"HWTIMER_SYS_Init()", check where made the code enter the unhandled interrupt.

If still can not work well , you can send your project to me , i will test it on my side.

Hope it helps

Alice

[viniciusmaciel]

Hi Alice,

The example i2c_comm_slave_frdmk64 works, but if I add the code hwtimer_demo_frdmk64f inside it, it stops working. The reverse is also true,  hwtimer_demo_frdmk64f works without i2c_slave code.

(1) delete the ".matadate"  under workspace, then build , then test - Doing this still does not work.

(2) The last line executed: INT_SYS_InstallHandler() at fsl_interrupt_manager.c:80 0x3b82

/* Set handler into vector table */
    __VECTOR_RAM[irqNumber + 16] = (uint32_t)handler;

As said giacomopetrini, it's an interrupt problem.

My project: i2c_comm.zip - Google Drive

[Alice_Yang]

Hello Vinicius,

I don't know why i can't get your project , please attach it on here :

Or send it to email "b51432@freescale.com"

BR

Alice

[viniciusmaciel]

Hi,

Ok, I managed to attach the file. :smileygrin: