CCS/TIDA-00120: MSP430F5132

Hello Sanjay,

Although I'm unfamiliar with this TI Design, I would recommend that you refer to our code examples for MSP430F5132 inside the TI Resource Explorer in CCS. Combined with referencing the MSP430x5xx and MSP430x6xx Family User's Guide, you can add to or re-configure the TI Design source code to add support for the ADC A7 and A8 channels.

Looking at the 'main.c' file from the PMP7605 source code, I found the "Init_ADC()" function where the ADC setup is done. Assuming you want the additional A7 and A8 channels to be similar to the other channels, one of the first things that I would change is "ADC10INCH_5" to "ADC10INCH_8".

void Init_ADC (void)
{
	  // Configure ADC10
	  ADC10CTL0 = ADC10SHT_2 + ADC10MSC + ADC10ON;// 16ADCclks, MSC, ADC ON
	  ADC10CTL1 = ADC10SHP + ADC10CONSEQ_1;     // sampling timer, s/w trig.,single sequence
	  ADC10CTL2 |= ADC10RES;                    // 10-bit conversion results
	  ADC10MCTL0 = ADC10INCH_5 + ADC10SREF_1;   // A0,A1,A2,A3,A4,A5(EoS), Vref
	  // By default, REFMSTR=1 => REFCTL is used to configure the internal reference
	  while(REFCTL0 & REFGENBUSY);              // If ref generator busy, WAIT
	  REFCTL0 |= REFVSEL_2+REFON;               // Select internal ref = 2.5V
	  _delay_cycles (1000);
	  // Configure DMA0 (ADC10IFG trigger)
	  DMACTL0 = DMA0TSEL_24;                    // ADC10IFG trigger
	  __data16_write_addr((unsigned short) &DMA0SA,(unsigned long) &ADC10MEM0);
	                                            // Source single address
	  __data16_write_addr((unsigned short) &DMA0DA,(unsigned long) &ADC_Readings[0]);
	                                            // Destination array address
	  DMA0SZ = 0x06;                            // 3 conversions
	  DMA0CTL = DMADT_4 + DMADSTINCR_3 + DMAEN + DMAIE;

}

Regards,

James

MSP Customer Applications

Sir,
I have already done this process but i can't get ADC values.

Hello,

That's good to know, but please provide more details about what you've tried. First, I would recommend you break up this challenge. Start with our code examples and fully understanding how to read the ADC data from the desired channels without using the DMA. Then, figure out how the DMA is being used in the TI Design code (since it's initialized in the "Init_ADC" function) to move the ADC data from the buffers to arrays, and then integrate everything in the TI Design code piece by piece.

Regards,

James

MSP Customer Applications

sir,
I have done bellow changes in this program to enable the ADC A7. I have increase the array value of ADC (1). Then define the integers. for store the values of ADC output (2). Define the 7th ADC name (3). Initialize the integers from 0 value(4). Take the average of ADC values and store the final value of average ADC in another integer(5). After use this value again initialize the integer from 0 (6). Changes in average Value of ADC function, change in IO function and changes in ADC initialize function (7). But i can't enable the A7 and can't get the value on A7.

1. unsigned int ADC_Readings [7];

2. unsigned int Temp_Comp, Temp_Comp_Avg=0;

3. #define T_C 7

4. Temp_Comp_Avg = 0;

5. Temp_Comp = Temp_Comp_Avg / ctr_th;

6. Temp_Comp_Avg = 0;

7. #pragma vector=DMA_VECTOR
__interrupt void DMA0_ISR (void)
{
switch(__even_in_range(DMAIV,16))
{
case 0: break; // No interrupt
case 2:
// sequence of conversions complete
ADC10CTL0 &= ~ADC10ENC;
Panel_Voltage_Avg += ADC_Readings [P_V];
Battery_Voltage_Avg += ADC_Readings [B_V];
Panel_Current_Avg += ADC_Readings [P_I_S];
Battery_Current_Avg += ADC_Readings [B_I_S];
Load_Current_Avg += ADC_Readings [B_I];
Temp_Comp_Avg += ADC_Readings [T_C];
Reading_Captured = 1;
Avg_ctr ++;

break; // DMA0IFG
case 4: break; // DMA1IFG
case 6: break; // DMA2IFG
case 8: break; // Reserved
case 10: break; // Reserved
case 12: break; // Reserved
case 14: break; // Reserved
case 16: break; // Reserved
default: break;
}
}


/*Here all the PORT initialization is done*/
void Init_IOs (void)
{
// Hi-Res freq locked; now configure ports to output PWMs at TD0/TD1
P1SEL |= BIT7; // P1.7,TD0.1, options select
P1DIR |= BIT7; // Output direction
P2SEL |= BIT0 + BIT2 + BIT3; // P2.0/TD0.2, P2.2/TD1.1, P2.3/TD1.2, options select
P2DIR |= BIT0 + BIT2 + BIT3 + BIT4 + BIT5 + BIT6; // Output direction
// P3DIR &= ~BIT6;
P2DIR &= ~BIT1;

PMAPPWD = 0x02D52; // Enable Write-access to modify port mapping registers
PMAPCTL = PMAPRECFG; // Allow reconfiguration during runtime
P1MAP0|= PM_ANALOG; // Modify all PxMAPy registers
P1MAP1|= PM_ANALOG; // Modify all PxMAPy registers
P1MAP2|= PM_ANALOG; // Modify all PxMAPy registers
P1MAP3|= PM_ANALOG; // Modify all PxMAPy registers
P1MAP4|= PM_ANALOG; // Modify all PxMAPy registers
P1MAP5|= PM_ANALOG; // Modify all PxMAPy registers
P3MAP6|= PM_ANALOG; // Modify all PxMAPy registers
PMAPPWD = 0; // Disable Write-Access to modify port mapping registers by writing incorrect key
P1SEL |= BIT0 + BIT1 + BIT2 + BIT3 + BIT4 + BIT5; // setting the port mapping register PxMAPy to PM_ANALOG together with PxSEL.y=1 when applying analog signals

P3SEL |= BIT6;

P3DIR |= BIT2 + BIT3;
PANEL_DISABLE;
}



void Init_ADC (void)
{
// Configure ADC10
ADC10CTL0 = ADC10SHT_2 + ADC10MSC + ADC10ON;// 16ADCclks, MSC, ADC ON
ADC10CTL1 = ADC10SHP + ADC10CONSEQ_1; // sampling timer, s/w trig.,single sequence
ADC10CTL2 |= ADC10RES; // 10-bit conversion results
ADC10MCTL0 = ADC10INCH_7 + ADC10SREF_1; // A0,A1,A2,A3,A4,A5,A6,A7(EoS), Vref
// By default, REFMSTR=1 => REFCTL is used to configure the internal reference
while(REFCTL0 & REFGENBUSY); // If ref generator busy, WAIT
REFCTL0 |= REFVSEL_2+REFON; // Select internal ref = 2.5V
_delay_cycles (1000);
// Configure DMA0 (ADC10IFG trigger)
DMACTL0 = DMA0TSEL_24; // ADC10IFG trigger
__data16_write_addr((unsigned short) &DMA0SA,(unsigned long) &ADC10MEM0);
// Source single address
__data16_write_addr((unsigned short) &DMA0DA,(unsigned long) &ADC_Readings[0]);
// Destination array address
DMA0SZ = 0x06; // 3 conversions
DMA0CTL = DMADT_4 + DMADSTINCR_3 + DMAEN + DMAIE;

}