i.MX Processors中的主题 question about interrupt

question about interrupt

caibai — Wed, 28 Sep 2016 08:21:13 GMT

i use imx6sx-sd board and have some question about how interrupt work

if i set GPIO6_2 as interrupt pin at both Cortex-A9 and Cortex-M4,when this pin is trigger,which core will handle this interrupt signal

i read <Getting_Started_with_Multicore_Programming_for_i.MX_6SoloX_V0.pdf> about low power function,it means that when Cortex-M4 set into low power mode , linux will close Cortex-M4 clock and Cortex-M4 can't wake up by interrupt direct. it only let linux register wake up interrupt souce and first wake up linux ,then linux open Cortex-M4 clock and let it run out low power mode ?

Re: question about interrupt

igorpadykov — Wed, 28 Sep 2016 09:41:51 GMT

Hi cai

seems you are right: please check Table 10-1. Power Modes

i.MX6SX Reference Manual, its shows M4 as Always Clock Gated

in Stop mode.

http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6SXRM.pdf

Best regards
igor
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Re: question about interrupt

caibai — Wed, 28 Sep 2016 11:21:45 GMT

thank you for reply.

how CPU deal with GPIO interrupt when Cortex-A9 and Cortex-M4 both configure it as interrupt

Re: question about interrupt

igorpadykov — Wed, 28 Sep 2016 11:29:08 GMT

please check Chapter 52 Resource Domain Controller (RDC)