LPC1115 freezes while reading ADC

lpcware — Wed, 15 Jun 2016 19:29:19 GMT

Content originally posted in LPCWare by audriusmerfeldas on Mon Oct 19 14:45:46 MST 2015
My LPC1115 freezes at the line:
"while ((LPC_ADC->DR[1] < 0x7FFFFFFF));   //wait for "done" bit to be set" or sometimes on:
"while ((LPC_ADC->DR[2] < 0x7FFFFFFF));   //wait for "done" bit to be set".

Any advices?

Please find the code bellow:

//SET UP THE ADC
LPC_SYSCON->PDRUNCFG        &= ~(0x1<<4); //power the ADC
LPC_SYSCON->SYSAHBCLKCTRL   |= (1<<13);    //enable clock for ADC
LPC_IOCON->R_PIO0_11        &= 0xFFFFFF78; //clear FUNC field for pin 32, set to analog input
LPC_IOCON->R_PIO1_0         &= ~(0x97);    //clear FUNC field for pin 33, set to analog input
LPC_IOCON->R_PIO1_1         &= ~(0x97);    //clear FUNC field for pin 34, set to analog input
LPC_IOCON->R_PIO0_11        |= (1<<1);     //set to ADC mode for pin 32
LPC_IOCON->R_PIO1_0        |= (1<<1);     //set to ADC mode for pin 33
LPC_IOCON->R_PIO1_1        |= (1<<1);     //set to ADC mode for pin 34
LPC_IOCON->R_PIO0_11         &= ~(0x10);    //turn off pull up
LPC_IOCON->R_PIO1_0          &= ~(0x10);    //turn off pull up
LPC_IOCON->R_PIO1_1          &= ~(0x10);    //turn off pull up

while (1)                                   // Loop forever
{
      LPC_ADC->CR     = 0x0B01;      //select ADC channel AD0 (pin 32), set up clock
      LPC_ADC->CR     |= (1<<24);    //start conversion by setting "Start Conversion Now" bit
      while ((LPC_ADC->DR[0] < 0x7FFFFFFF));   //wait for "done" bit to be set
      x=(LPC_ADC->DR[0]);

      LPC_ADC->CR     = 0x0B02;      //select ADC channel AD1 (pin 33), set up clock
      LPC_ADC->CR     |= (1<<24);    //start conversion by setting "Start Conversion Now" bit
      while ((LPC_ADC->DR[1] < 0x7FFFFFFF));   //wait for "done" bit to be set
      y=(LPC_ADC->DR[1]);

      LPC_ADC->CR     = 0x0B04;      //select ADC channel AD2 (pin 34), set up clock
      LPC_ADC->CR     |= (1<<24);    //start conversion by setting "Start Conversion Now" bit
      while ((LPC_ADC->DR[2] < 0x7FFFFFFF));   //wait for "done" bit to be set
      z=(LPC_ADC->DR[2]);

Re: LPC1115 freezes while reading ADC

lpcware — Wed, 15 Jun 2016 19:29:20 GMT

Content originally posted in LPCWare by audriusmerfeldas on Mon Oct 19 23:19:46 MST 2015
It doesn't freeze immediately, but after 8 - 15s of continuous operation.

topic Re: LPC1115 freezes while reading ADC in LPC Microcontrollers

LPC1115 freezes while reading ADC

Re: LPC1115 freezes while reading ADC