topic Re: How can I trigger the ADC12 with a Timer? I Can't find the dubious SYNC1 signal. (MC56F84769) in Digital Signal Controllers

How can I trigger the ADC12 with a Timer? I Can't find the dubious SYNC1 signal. (MC56F84769)

andreasvogt — Thu, 19 Jun 2014 08:07:19 GMT

Hi,

How can I trigger the ADC12 with a Timer? I Can't find the dubious SYNC1 signal. (MC56F84769)

The manual says: Use a SYNC1 input pulse or CTRL2[START1] bit to initiate a B converter parallel scan.

So what is SYNC1, a input pin, a interprocess signal and where can I find it?

Thanks

Re: How can I trigger the ADC12 with a Timer? I Can't find the dubious SYNC1 signal. (MC56F84769)

admin — Thu, 19 Jun 2014 09:20:19 GMT

Hi Andreas,

SYNC1 is a input of the ADC Module and you can map several signals to this input by using XBAR.

=> Map XBAR Input of your timer you like to use to XBAR output of ADC trigger

Re: How can I trigger the ADC12 with a Timer? I Can't find the dubious SYNC1 signal. (MC56F84769)

xiangjun_rong — Fri, 20 Jun 2014 06:17:51 GMT

Hi,Andreas

As MR Matthias Uhlmann says, the ADC sync1 signal can be routed from crossbar. Pls refer to section 3.3.3.4 XBARA Outputs in MC56F847xxRM, the XBAR_OUT12 is ADC12 Sync0 signal, you can use crossbar to route a signal in section 3.3.3.2 XBARA and XBARB Inputs to the XBAR_OUT12.

this is a code of setting the crossbar:

PWMA_SM0TCTRL|=0x01; //enable value0 of PWMA_SM0 module to trigger ADC12

XBARA_SEL6=20; //PWMA_SM0_TRIG0 signal is XBAR_IN20, used to trigger ADC12 sync0