MPC5606S PWM output

miquel_soler — Mon, 05 May 2014 15:01:31 GMT

Hi, I'm new in Qoriwa architecture.

I'm using the MPC5606S-Demo board.

I have a problem in the TFT blacklight regulation.

I'm trying to output a PWM signal from PG12 output line. The output is every time low.

I try to output the PWM in likes PJ14 and PK0 and are working fine but when I try in lines PG12 / PK10 and PK11 doesn't work.

I'm using the code warrions IDE and the code is on bottom of the post:

I don't know what I'm doing wrong ?

Can some body help me in this problem.

Thanks in advance.

void initEMIOS_0(void)

{

ME.PCTL[72].R = 0x01; // MPC56xxB/P/S EMIOS 0: select ME.RUNPC[0]

CGM.AC1_SC.R = 0x03000000; // MPC56xxS: Select aux. set 1 clock to be FMPLL0

CGM.AC1_DC.B.DE0 = 1; // MPC56xxS: Enable aux. clock to eMIOS0

EMIOS_0.MCR.B.GPRE = 63; // Divide 64 MHz sysclk by 63+1 = 64 for 1MHz eMIOS clk

EMIOS_0.MCR.B.GPREN = 1; // Enable eMIOS clock

EMIOS_0.MCR.B.GTBE = 1; // Enable global time base

EMIOS_0.MCR.B.FRZ = 1; // Enable stopping channels when in debug mode

}

void initEMIOS_0ch23(void) // EMIOS 0 CH 23: Modulus Up Counter

{

EMIOS_0.CH[23].CADR.R = 999; // Period will be 999+1 = 1000 clocks (1 msec)

EMIOS_0.CH[23].CCR.B.MODE = 0x50; // Modulus Counter Buffered (MCB)

EMIOS_0.CH[23].CCR.B.BSL = 0x3; // Use internal counter

EMIOS_0.CH[23].CCR.B.UCPRE = 0; // Set channel prescaler to divide by 1

EMIOS_0.CH[23].CCR.B.UCPEN = 1; // Enable prescaler counter to count

EMIOS_0.CH[23].CCR.B.FREN = 1; // Freeze channel counting when in debug mode

}

void initEMIOS_0ch20(void) // EMIOS 0 CH 20: Output Pulse Width Modulation

{

EMIOS_0.CH[20].CADR.R = 250; // Leading edge when channel counter bus=500

EMIOS_0.CH[20].CBDR.R = 500; // Trailing edge when channel's counter bus=999

EMIOS_0.CH[20].CCR.B.BSL = 0x0; // Use counter bus A (default)

EMIOS_0.CH[20].CCR.B.EDPOL = 1; // Polarity-leading edge sets pin; trailing clears

EMIOS_0.CH[20].CCR.B.MODE = 0x60; // Mode is OPWM Buffered

SIU.PCR[PJ14].R = 0x0800; // Set PG12 as output with opt3

}

void initEMIOS_0ch18(void) // EMIOS 0 CH 18: Output Pulse Width Modulation

{

EMIOS_0.CH[18].CADR.R = 250; // Leading edge when channel counter bus=500

EMIOS_0.CH[18].CBDR.R = 750; // Trailing edge when channel's counter bus=999

EMIOS_0.CH[18].CCR.B.BSL = 0x0; // Use counter bus A (default)

EMIOS_0.CH[18].CCR.B.EDPOL = 1; // Polarity-leading edge sets pin; trailing clears

EMIOS_0.CH[18].CCR.B.MODE = 0x60; // Mode is OPWM Buffered

SIU.PCR[PK0].R = 0x0800; // Set PG12 as output with opt3

}

void initEMIOS_0ch15(void) // EMIOS 0 CH 18: Output Pulse Width Modulation

{

EMIOS_0.CH[15].CADR.R = 250; // Leading edge when channel counter bus=500

EMIOS_0.CH[15].CBDR.R = 750; // Trailing edge when channel's counter bus=999

EMIOS_0.CH[15].CCR.B.BSL = 0x0; // Use counter bus A (default)

EMIOS_0.CH[15].CCR.B.EDPOL = 1; // Polarity-leading edge sets pin; trailing clears

EMIOS_0.CH[15].CCR.B.MODE = 0x60; // Mode is OPWM Buffered

SIU.PCR[PK10].R = 0x0800; // Set PG12 as output with opt3

}

void initEMIOS_0ch8(void) // EMIOS 0 CH 8: Output Pulse Width Modulation

{

EMIOS_0.CH[8].CADR.R = 250; // Leading edge when channel counter bus=500

EMIOS_0.CH[8].CBDR.R = 750; // Trailing edge when channel's counter bus=999

EMIOS_0.CH[8].CCR.B.BSL = 0x0; // Use counter bus A (default)

EMIOS_0.CH[8].CCR.B.EDPOL = 1; // Polarity-leading edge sets pin; trailing clears

EMIOS_0.CH[8].CCR.B.MODE = 0x60; // Mode is OPWM Buffered

SIU.PCR[PG12].R = 0x0C00; // Set PG12 as output with opt3

}

And in Main:

initEMIOS_0();

initEMIOS_0ch23();

initEMIOS_0ch20();

initEMIOS_0ch18();

initEMIOS_0ch15();

initEMIOS_0ch8();

Re: MPC5606S PWM output

lukaszadrapa — Tue, 13 May 2014 08:14:23 GMT

Hi,

take a look at reference manual, Table 9-2 on page 237:

http://www.freescale.com/files/32bit/doc/ref_manual/MPC5606SRM.pdf

Not all functions are implemented on all channels.

Best Regards,

Lukas

Re: MPC5606S PWM output

miquel_soler — Tue, 13 May 2014 18:51:44 GMT

Thanks for the replay.

This means that the PWM name from schematic of MPC5606S-DEMO is no correctly.

I solve this problems configuring the original out as pinput and make a short (bridge with wire-rap) with a valid PWM output.

With this way I can regulate the brightness of TFT display.

Best Regards.

Miquel Soler

MPC5xxx中的主题 Re: MPC5606S PWM output

MPC5606S PWM output

Re: MPC5606S PWM output

Re: MPC5606S PWM output