ADC via Debugout

lpcware — Wed, 15 Jun 2016 19:33:43 GMT

Content originally posted in LPCWare by Analog2Can on Mon May 05 11:30:45 MST 2014
Hi,

I want to see the output of the ADC from my LPC11C24 on my console. I'm using the adc example (nxp_lpcxpresso_11c24_periph_adc). I already defined DEBUG_ENABLE and DEBUG_SEMIHOSTING but I don't get anything on my Console. This is what the example code look like.

#include "board.h"
#include <stdio.h>

#if !defined(CHIP_LPC1125)

/*****************************************************************************
 * Private types/enumerations/variables
 ****************************************************************************/

static ADC_CLOCK_SETUP_T ADCSetup;

/*****************************************************************************
 * Public types/enumerations/variables
 ****************************************************************************/

/*****************************************************************************
 * Private functions
 ****************************************************************************/

static void Init_ADC_PinMux(void)
{
#if (defined(BOARD_NXP_XPRESSO_11U14) || defined(BOARD_NGX_BLUEBOARD_11U24))
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 11, FUNC2);
#elif defined(BOARD_NXP_XPRESSO_11C24)
Chip_IOCON_PinMuxSet(LPC_IOCON, IOCON_PIO0_11, FUNC2);
#else
#error "Pin muxing for ADC not configured"
#endif
}

/*****************************************************************************
 * Public functions
 ****************************************************************************/

/**
 * @briefmain routine for ADC example
 * @returnFunction should not exit
 */
int main(void)
{
uint16_t dataADC;
int j;

SystemCoreClockUpdate();
Board_Init();
Init_ADC_PinMux();
DEBUGSTR("ADC Demo\r\n");

/* ADC Init */
Chip_ADC_Init(LPC_ADC, &ADCSetup);
Chip_ADC_EnableChannel(LPC_ADC, ADC_CH0, ENABLE);

while (1) {
/* Start A/D conversion */
Chip_ADC_SetStartMode(LPC_ADC, ADC_START_NOW, ADC_TRIGGERMODE_RISING);

/* Waiting for A/D conversion complete */
while (Chip_ADC_ReadStatus(LPC_ADC, ADC_CH0, ADC_DR_DONE_STAT) != SET) {}

/* Read ADC value */
Chip_ADC_ReadValue(LPC_ADC, ADC_CH0, &dataADC);

/* Print ADC value */
DEBUGOUT("ADC value is 0x%x\r\n", dataADC);

/* Delay */
j = 500000;
while (j--) {}
}

/* Should not run to here */
return 0;
}

#endif /* !defined(CHIP_LPC1125) */

Do anybody have an idea what I'm doing wrong?

Re: ADC via Debugout

lpcware — Wed, 15 Jun 2016 19:33:44 GMT

Content originally posted in LPCWare by Analog2Can on Mon May 05 12:09:53 MST 2014
I solved it. You just have to click on

Quickstart Panel > Quick Settings > Set library type > Redlib (semihost)

Done.

Re: ADC via Debugout

lpcware — Wed, 15 Jun 2016 19:33:45 GMT

Content originally posted in LPCWare by lpcxpresso-support on Tue May 06 01:42:39 MST 2014
Glad you got it working. For future reference, the LPCOpen FAQ on using the debugout functionality does mention the need to switch on semihosting in LPCXpresso:

http://www.lpcware.com/content/faq/lpcopen-debug-inputoutput-support

[in the section 'Additional information on setting up semihosting'].

Regards,
LPCXpresso Support

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