topic Reading ADC_LDD values in MQX Software Solutions

Reading ADC_LDD values

yogesh8418 — Mon, 17 Jun 2013 10:50:22 GMT

I have TWR-K20D72M and I read the quick start pdf of the TWR-K20D72M .I am Freescale MQX RTOS 4.0 BSP for TWR-K20D72M.

Now I want to read the ADC value which comes from the Potentiometer Already attach to the board. So I added ADC_LDD from processor expert and set the pin no. of the potentiometer mentioned in the Manual. My settings are shown in the picture attached. then I generate the code and build bsp.

My code for reading the value is below.

LDD_TDeviceData *Analog_DeviceData;

LDD_TError Analog;

LDD_TData *Buffer_DAta;

static uint16_t value;

void Analog_task

(

uint_32 initial_data

)

{

puts("\nInitializing Analog device.....");

Analog_DeviceData = AD1_Init(NULL);

if (Analog_DeviceData == NULL) {

puts("failed");

_task_block();

}

else {

puts("done");

}

for(;;) {

//AD1_StartLoopMeasurement();

AD1_StartLoopMeasurement(&Analog_DeviceData); /* do conversion and wait for the result */

AD1_GetMeasuredValues(&Analog_DeviceData,&Buffer_DAta); /* get the result into value variable */

printf("\n - Buffer_DAta = %d Hz", &Buffer_DAta);

puts(Buffer_DAta);

}

But no output Shown I change the value.

Can any one suggest me the efficient way of reading the ADC values using MQX and Processor Expert.

Re: Reading ADC_LDD values

Ali_Pina — Wed, 21 Aug 2013 03:49:03 GMT

Hi Yogesh,

I would suggest that you take a look to “CW for Microcontrollers v10 and MQX” which can be found at this path:

C:\Freescale\Freescale_MQX_4_0\doc\tools\cw

In page 64 you will find an explanation on how to add a new driver and specifically how to add ADC_LDD component.

I just ran a test using the pe_demo and added a task and it works with no issues. I am attaching the main.c file for your reference.

Hope this helps.

-Alí

Re: Reading ADC_LDD values

Monica — Tue, 27 Aug 2013 19:55:51 GMT

Hello Yogesh,

was this suggestion helpful? Please keep us posted :smileywink:

Best,

Monica.