LPIT-TRIGMUX-PDB-ADC-DMA

[syam]

Hi,

iam using s32k146 , in our project we use ADC0 Channel 6, 7 & 12. For adc0 channel 12 PDB0 is used for triggering and for ADC0 channel 6 & 7 PDB1 is used for triggering. then now using  seperate channels in LPIT0 channel 0 for triggering PDB0 and  LPIT0 channel 1 for triggering PDB1. please support in this cofiguration for LPIT-TRIGMUX-PDB-ADC-DMA.

[syam]

kindly help me to solve  mentioned issue

[davidtosenovjan]

Please specify a question or issue. Thanks

[syam]

In our project we need to trigger PDB0 and PDB1 individually. Here we are using LPIT0 channel 0 for PDB0 and LPIT0 channel 1 for PDB1.

PDB0 is triggering successfully by LPIT0 channel0.

but i can't able to trigger PDB1 by using LPIT0 channel1.

Here screenshots for configuration settings of PDB1, LPIT0 and TRIGMUX is attached, please support to do this.

[PetrS]

Hi,

components setting you share looks normal, so be sure all necessary init is done in software.
However, one ADC and one PDB work as one pair: PDB0-ADC0, PDB1-ADC1. So you cannot trigger ADC0 from PDB1, you mentioned.

You can refer to below example. It just trigger both PBDs from single LPIT channel, but can be easily modified.https://community.nxp.com/t5/S32K-Knowledge-Base/Example-S32K144-PDB-ADC-DMA-S32DS-ARM-2018-R1/ta-p/...

BR, Petr

[syam]

thanks for reply,

i already got the example you shared now.

I already configured PDB0-ADCO for triggering channel 12 and collected data successfully.

in my project we only using ADC0 channels channel 12 , channel 6 and channel 7.  but not need to trigger all channel in same time . based on my requirements i need to trigger ADC0 channel 12  at some conditions and another conditions  i need trigger ADC0 channel 6 & 7. Is it possible to do like this.

[syam]

Hi,

Kindly  inform me is it possible to do like this.

[PetrS]

Hi,

this will not be possible using single PBD module. Either sample all channels together or use second PDB-ADC modules for rest of channels.

BR, Petr