How I add another ADC channel on DMA that set on example?

kwonym — Wed, 15 Oct 2014 02:49:08 GMT

Hi, I use Differential ADC0 of DMA.

It used by example code.

But I don't know about how I add ADC1 channel that set on DMA.

I have been added ADC1 to code that use example.

but, result wasn't input on ADC1

About ADC0, It is on example.

About ADC1, It is my code.

//**** PDB config **********************************************************

PDBCH0TRG0_Init (PDB_PRETRG_ON_DEALYED_CONFIG, 0x0010);

//PDBCH0TRG1_Init (PDB_PRETRG_ON_DEALYED_CONFIG, 0x0010);

PDB_Init (PDB_MODULE_SWTRG_NO_IRQ_CONFIG( PDB_PRESCALER_1, PDB_MULT_1, 0x1000, 0xFFFF), 1, NULL);

//**** ADC config **********************************************************

//**** ADC calibrations **************************************************

ADC_ExecCalib (ADC0,ADC_MODULE_16B_IREF_HWTRG_CONFIG_U, &ram_adc0); //DC OK, AC??

//ADC_ExecCalib (ADC1,ADC_MODULE_16B_IREF_HWTRG_CONFIG_U, &ram_adc1); //DC OK, AC??

//**** ADC0,ADC1 initialization ******************************************

ADC_Init (ADC0, ADC_MODULE_16B_HWTRG_DMA_IREF_USER_CONFIG, ADC_CH_DI_POLL_CONFIG(DAD0), ADC_CH_DI_POLL_CONFIG(DAD0), 2, NULL);

//ADC_Init (ADC1, ADC_MODULE_16B_HWTRG_DMA_IREF_USER_CONFIG, ADC_CH_DI_POLL_CONFIG(DAD3), ADC_CH_DI_POLL_CONFIG(DAD3), 3, NULL);

//**** DMA channel 0 *****************************************************

DMACH0_CH1_Init();

//DMACH1_CH1_Init();

//**** Enable all interrupts ***********************************************

EnableInterrupts;

//**** Start PDB ***********************************************************

PDB0_Trigger();

void DMACH0_CH1_Init(void)
{
//****************************************************************************
//**** DMA channel 0, use for Write ADC mux channel, form SRAM to ADC ********        101page datasheet
//****************************************************************************
DMAMUX0_CHCFG0           = DMAMUX_CHCFG_ENBL_MASK|DMAMUX_CHCFG_SOURCE(54);   //DMA source DMA Mux
DMA_TCD0_SADDR          = (uint32) &uc_adc0_mux[0];                            //New mux setiing
DMA_TCD0_SOFF           = 0x01;                                               //Source address increment, adding "1"
DMA_TCD0_SLAST          = (uint32) -3;                                        //Source address decrement after major loop complete
DMA_TCD0_DADDR          = (uint32) &ADC0_SC1A;                                //Destination address ADC0 mux selector
DMA_TCD0_DOFF           = 0x00;                                               //Destination address increment, adding "0"
DMA_TCD0_DLASTSGA       = 0x00;                                               //Destination address shift, go to back to [0]
DMA_TCD0_NBYTES_MLNO    = 0x01;                                               //No of bytes minor loop
DMA_TCD0_BITER_ELINKNO = 0x03;                                               //Major loop step, 3 ADC channel are scaning
DMA_TCD0_CITER_ELINKNO = 0x03;                                               //Major loop step, 3 ADC channel are scaning
DMA_TCD0_ATTR           = DMA_ATTR_SSIZE(0)|DMA_ATTR_DSIZE(0);                //Source a destination size, 8bit
DMA_TCD0_CSR            = 0x0000;                                             //

//****************************************************************************
//**** DMA channel 1, use for Read ADC result data, form ADC to SRAM *********
//****************************************************************************
NVIC_SetIsr(INT_DMA1_DMA17,2);                                                      //17

DMAMUX0_CHCFG1           = DMAMUX_CHCFG_ENBL_MASK|DMAMUX_CHCFG_SOURCE(40);   //DMA source ADC0
DMA_TCD1_SADDR          = (uint32) &ADC0_RA;                                  //Source address ADC0 result register
DMA_TCD1_SOFF           = 0x00;                                               //Source address increment, adding "0"
DMA_TCD1_SLAST          = 0x00;                                               //Source address decrement after major loop complete
DMA_TCD1_DADDR          = (uint32) &i_adc0_result[0];                         //Destination address, ADC0 result buffer
DMA_TCD1_DOFF           = 0x02;                                               //Destination address increment, adding "+2"
DMA_TCD1_DLASTSGA       = (uint32) -6;                                       //Destination address decrement after major loop complete
DMA_TCD1_NBYTES_MLNO    = 0x02;                                               //No of bytes minor loop, 16bit ADC result
DMA_TCD1_BITER_ELINKNO = (DMA_BITER_ELINKNO_ELINK_MASK|0x0000|0x03);         //Channel 0 Link, Channel 0, Major loop step 3 x 4 = 12
DMA_TCD1_CITER_ELINKNO = (DMA_CITER_ELINKNO_ELINK_MASK|0x03);                //Channel 0 Link, Major loop step 3 x 4 = 12
DMA_TCD1_ATTR           = DMA_ATTR_SSIZE(1)|DMA_ATTR_DSIZE(1);                //Source a destination size, 16bit
DMA_TCD1_CSR            = (DMA_CSR_MAJORLINKCH(0)|DMA_CSR_MAJORELINK_MASK)|   //Major loop finished start request for Channel 0
                            DMA_CSR_INTMAJOR_MASK; //|DMA_CSR_INTHALF_MASK;     //Irq. enable, full transfer, half complet transfer
DMA_ERQ                |= DMA_ERQ_ERQ1_MASK;                                  //HW request enable

}

void DMACH1_CH1_Init(void)
{
//****************************************************************************
//**** DMA channel 0, use for Write ADC mux channel, form SRAM to ADC ********        101page datasheet
//****************************************************************************
DMAMUX1_CHCFG0           = DMAMUX_CHCFG_ENBL_MASK|DMAMUX_CHCFG_SOURCE(55);   //DMA source DMA Mux
DMA_TCD2_SADDR          = (uint32) &uc_adc1_mux[0];                            //New mux setiing
DMA_TCD2_SOFF           = 0x01;                                               //Source address increment, adding "1"
DMA_TCD2_SLAST          = (uint32) -3;                                        //Source address decrement after major loop complete
DMA_TCD2_DADDR          = (uint32) &ADC1_SC1A;                                //Destination address ADC0 mux selector
DMA_TCD2_DOFF           = 0x00;                                               //Destination address increment, adding "0"
DMA_TCD2_DLASTSGA       = 0x00;                                               //Destination address shift, go to back to [0]
DMA_TCD2_NBYTES_MLNO    = 0x01;                                               //No of bytes minor loop
DMA_TCD2_BITER_ELINKNO = 0x03;                                               //Major loop step, 3 ADC channel are scaning
DMA_TCD2_CITER_ELINKNO = 0x03;                                               //Major loop step, 3 ADC channel are scaning
DMA_TCD2_ATTR           = DMA_ATTR_SSIZE(0)|DMA_ATTR_DSIZE(0);                //Source a destination size, 8bit
DMA_TCD2_CSR            = 0x0000;                                             //

//****************************************************************************
//**** DMA channel 1, use for Read ADC result data, form ADC to SRAM *********
//****************************************************************************
NVIC_SetIsr(INT_DMA3_DMA19,3);                                                      //17

DMAMUX1_CHCFG1           = DMAMUX_CHCFG_ENBL_MASK|DMAMUX_CHCFG_SOURCE(41);   //DMA source ADC1
DMA_TCD3_SADDR          = (uint32) &ADC1_RA;                                  //Source address ADC0 result register
DMA_TCD3_SOFF           = 0x00;                                               //Source address increment, adding "0"
DMA_TCD3_SLAST          = 0x00;                                               //Source address decrement after major loop complete
DMA_TCD3_DADDR          = (uint32) &i_adc1_result[0];                         //Destination address, ADC0 result buffer
DMA_TCD3_DOFF           = 0x02;                                               //Destination address increment, adding "+2"
DMA_TCD3_DLASTSGA       = (uint32) -6;                                       //Destination address decrement after major loop complete
DMA_TCD3_NBYTES_MLNO    = 0x02;                                               //No of bytes minor loop, 16bit ADC result
DMA_TCD3_BITER_ELINKNO = (DMA_BITER_ELINKNO_ELINK_MASK|0x0000|0x03);         //Channel 0 Link, Channel 0, Major loop step 3 x 4 = 12
DMA_TCD3_CITER_ELINKNO = (DMA_CITER_ELINKNO_ELINK_MASK|0x03);                //Channel 0 Link, Major loop step 3 x 4 = 12
DMA_TCD3_ATTR           = DMA_ATTR_SSIZE(1)|DMA_ATTR_DSIZE(1);                //Source a destination size, 16bit
DMA_TCD3_CSR            = (DMA_CSR_MAJORLINKCH(0)|DMA_CSR_MAJORELINK_MASK)|   //Major loop finished start request for Channel 0
                            DMA_CSR_INTMAJOR_MASK; //|DMA_CSR_INTHALF_MASK;     //Irq. enable, full transfer, half complet transfer
DMA_ERQ                |= DMA_ERQ_ERQ3_MASK;                                  //HW request enable

}

Re: How I add another ADC channel on DMA that set on example?

jeremyzhou — Mon, 20 Oct 2014 06:49:23 GMT

Hi Kwon,

In term of the codes you provided above, I found that the example code and yours both use the DMA Channel0 and Channel1.

I've like to suggest that you should choose other channels for the ADC1 except the Channel0 and Channel1.

Hope my reply helps.
Have a great day,
Ping

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How I add another ADC channel on DMA that set on example?

Re: How I add another ADC channel on DMA that set on example?