topic Re: Vybrid ADC Interrupt in Vybrid Processors

Vybrid ADC Interrupt

johannestraxler — Thu, 31 Jul 2014 10:33:15 GMT

Previously we worked with the LWADC driver, but the "wait_next" function gives a delay, so I'm searching for an improved method to access the ADC.

My question is:

How can I make the ADC interrupt driven (interrupt on conversion complete)?

I've checked the datasheet and there should be AIEN-Flag in the ADCx_HC0/1 registers, which might play a role here.

Re: Vybrid ADC Interrupt

karina_valencia — Mon, 04 Aug 2014 15:45:39 GMT

timesyssupport can you help to review this case?

Re: Vybrid ADC Interrupt

timesyssupport — Mon, 04 Aug 2014 16:38:01 GMT

Unfortunately, we do not have any details about how to make the MQX lwadc driver interrupt driven. Does the Freescale MQX team have any comment on this?

Thanks,

Timesys Support

Re: Vybrid ADC Interrupt

johannestraxler — Tue, 05 Aug 2014 13:55:22 GMT

I found the answer myself. You can use the MQX functions:

_int_install_isr(NVIC_ADC0, iADC_ISR, 0);

_bsp_int_init(NVIC_ADC0, 3, 0, TRUE);

_int_install_isr(NVIC_ADC1, iADC_ISR, 0);

_bsp_int_init(NVIC_ADC1, 3, 0, TRUE);

with iADC_ISR is the function pointer to the ISR: iADC_ISR(void*ptr).

And then make sure to have the AIEN flag enabled in the ADCx_HC0 registers!

Re: Vybrid ADC Interrupt

cyborgnegotiato — Thu, 07 Aug 2014 09:57:11 GMT

Hi,

For new implementation in MQX, you can find inspiration in adc driver (for example in Freescale_MQX_4_1\mqx\source\io\adc directory).

Regards,

Jozef