MPC5777C EQADC configuration using processor expert

[LyncLin]

I'm using S32 SDK to configure for the MPC5777C chip.

Before I have setup a FreeRTOS with 2 ms and 10 ms tasks, as well as an EMIOS_PWM output channel, to toggle three external LEDs, it works fine.

Now I try to add an EQADC input channel, then I use the same PE configuration as in the Example project adc_pal_eqadc_mpc5777c, but change the channel to ANB23 related to our hardware,  and add the initialize function into main.c as below. However, the software seems to halt during ADC_Init() function. I try to debug step by step, but can't figure it out.

status = ADC_Init(&adc_pal1_instance, &adc_pal1_InitConfig0);
DEV_ASSERT(status == STATUS_SUCCESS);

I need help to solve this issue. Enclosed the project files I'm using. Thanks for your reply in advance.

Regards,

Lync

[LyncLin]

It seems inside the ADC_Init(), OSIF_TimeDelay() will be called. However, I put ADC_Init() before vTaskStartScheduler(), so there is no tick for OSIF_TimeDelay to count, which will block the software. Then I try to put ADC_Init() in 2 ms Task, however, it still doesn't work, it will stop where ADC_Init() is called. It looks like some functions inside OSIF component that ADC_Init() is using by default has a confilict with freeRTOS that added after. 

I hope someone can help on this.

[PetrS]

Hi,

try to add ADC init into 10ms task, which has higher priority. Does it pass ADC init in that case?

BR, Petr 

[LyncLin]

No, it didn't work. I tried to creat only one task for ADC init, but not work as well.

[PetrS · Accepted solution]

Hi,

seems you make it finally running by increasing heap of init task, as you mentioned in https://community.nxp.com/t5/MPC5xxx/Is-there-an-example-project-to-configure-ADC-PAL-with-freertos/...

BR, Petr