TRK-MPC5604P ADC

simbasoft — Mon, 24 Feb 2014 01:16:44 GMT

Hello,

We are working on a new development project based on MPC5604P MCU. We are using TRK-MPC5604P Evaluation board developed by P&E Microcomputer Systems. I'm trying to run the example code provided in Freescale Application Note AN2865: (Section 22 ADC: Software Trigger, Continuous Scan) to experiment with the ADC functions. It is already the third day that I'm trying however, no matter what I did the ADC refuses to run. The conversion starts but never completes. I was wondering whether anybody had already used that example code given in the AN2865 and can help me finding what is wrong.

Thank you in advance.

simbasoft

Here are the values of ADC0MCR and the ADC0MSR registers.

===============================================

ADC0MCR = 0x21000000

Bit Field Values:

OWREN bits[ 31:31 ] = 0 Discarded

WLSIDE bits[ 30:30 ] = 0 Right-aligned

MODE bits[ 29:29 ] = 1 Scan Mode

EDGLEV bits[ 28:28 ] = 0 Ext. trigger on edge

TRGEN bits[ 27:27 ] = 0 Disabled

EDGE bits[ 26:26 ] = 0 Low level/Falling edge

XSTRTEN bits[ 25:25 ] = 0 Disabled

NSTART bits[ 24:24 ] = 1 Starts chain or scan conv

Not Implemented bits[ 23:23 ] = 0

JTRGEN bits[ 22:22 ] = 0 Disabled

JEDGE bits[ 21:21 ] = 0 Falling edge

JSTART bits[ 20:20 ] = 0 No effect

Not Implemented bits[ 19:18 ] = 0

CTUEN bits[ 17:17 ] = 0 Disabled

Not Implemented bits[ 16:9 ] = 0

ADCLKSEL bits[ 8:8 ] = 0 clkfreq=ipgclk freq/2

ABORTCHAIN bits[ 7:7 ] = 0 Does not abort

ABORT bits[ 6:6 ] = 0 Does not abort

ACKO bits[ 5:5 ] = 0 Disabled

Not Implemented bits[ 4:1 ] = 0

PWDN bits[ 0:0 ] = 0 Normal operation

===============================================

ADC0MSR = 0x1000804

Bit Field Values:

Not Implemented bits[ 31:25 ] = 0

NSTART bits[ 24:24 ] = 1 Conv. occurring

JABORT bits[ 23:23 ] = 0 New injected conv. started

Not Implemented bits[ 22:21 ] = 0

JSTART bits[ 20:20 ] = 0 Inj. conv. not occurring

Not Implemented bits[ 19:17 ] = 0

CTUSTART bits[ 16:16 ] = 0 CTU conv. not occurring

CHADDR bits[ 15:9 ] = 4

Not Implemented bits[ 8:6 ] = 0

ACKO bits[ 5:5 ] = 0 Disabled

Not Implemented bits[ 4:3 ] = 0

ADCSTATUS bits[ 2:0 ] = 4 Sample

Re: TRK-MPC5604P ADC

PetrS — Wed, 26 Feb 2014 12:33:47 GMT

Hi,

be sure the ADC is powered, J21 5V jumper should be placed.

BTW there is simple example showing ADC usage on TRK board on the https://community.freescale.com/docs/DOC-99861.

Regards,

Petr

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