reading adc multiple channel rt1064

sandeepc · ‎08-02-2023

hi i need to read multiple adc channels from ADC1 by using software trigger by below configuration but i am able to read only adc i.e 1st input channel but i couldnt able to read second channel

processor ==> imrt1064

adc pins i want to read ==>

GPIO_AD_B1_10
GPIO_AD_B1_11
GPIO_AD_B1_04
GPIO_AD_B1_05
GPIO_AD_B1_01
GPIO_AD_B1_00

MCUXpresso IDE v11.6.0 [Build 8187] [2022-07-13]

code=1

#include <stdio.h>

#include "board.h"

#include "peripherals.h"

#include "pin_mux.h"

#include "clock_config.h"

#include "MIMXRT1064.h"

#include "fsl_debug_console.h"

/* TODO: insert other include files here. */

/* TODO: insert other definitions and declarations here. */

volatile uint32_t adch0,adch1;

/*

* @brief Application entry point.

*/

/* ADC1_IRQn interrupt handler */

void BOARD_ADC1_IRQHANDLER(void)

{

adch0 = ADC_GetChannelConversionValue(ADC1, 0);

adch1 = ADC_GetChannelConversionValue(ADC1, 1);

ADC_SetChannelConfig(ADC1, 0, BOARD_ADC1_channels_config);

ADC_SetChannelConfig(ADC1, 1, BOARD_ADC1_channels_config);

}

int main(void) {

/* Init board hardware. */

BOARD_ConfigMPU();

BOARD_InitBootPins();

BOARD_InitBootClocks();

BOARD_InitBootPeripherals();

#ifndef BOARD_INIT_DEBUG_CONSOLE_PERIPHERAL

/* Init FSL debug console. */

BOARD_InitDebugConsole();

#endif

PRINTF("Hello World\n");

ADC_EnableHardwareTrigger(ADC1, 0);

ADC_SetChannelConfig(ADC1, 0, &BOARD_ADC1_channels_config[0]);

ADC_SetChannelConfig(ADC1, 1, &BOARD_ADC1_channels_config[1]);

volatile static int i = 0 ;

/* Enter an infinite loop, just incrementing a counter. */

while(1) {

i++ ;

/* 'Dummy' NOP to allow source level single stepping of

tight while() loop */

__asm volatile ("nop");

}

return 0 ;

}

code 2

#include <stdio.h>

#include "board.h"

#include "peripherals.h"

#include "pin_mux.h"

#include "clock_config.h"

#include "MIMXRT1064.h"

#include "fsl_debug_console.h"

/* TODO: insert other include files here. */

/* TODO: insert other definitions and declarations here. */

volatile uint32_t adch0,adch1;

/*

* @brief Application entry point.

*/

/* ADC1_IRQn interrupt handler */

void BOARD_ADC1_IRQHANDLER(void)

{

// while(1)

// {

// volatile static int a;

// a++;

// }

adch0 = ADC_GetChannelConversionValue(ADC1, 0);

adch1 = ADC_GetChannelConversionValue(ADC1, 1);

ADC_SetChannelConfig(ADC1, 0, BOARD_ADC1_channels_config);

ADC_SetChannelConfig(ADC1, 1, BOARD_ADC1_channels_config);

}

int main(void) {

/* Init board hardware. */

BOARD_ConfigMPU();

BOARD_InitBootPins();

BOARD_InitBootClocks();

BOARD_InitBootPeripherals();

#ifndef BOARD_INIT_DEBUG_CONSOLE_PERIPHERAL

/* Init FSL debug console. */

BOARD_InitDebugConsole();

#endif

PRINTF("Hello World\n");

ADC_EnableHardwareTrigger(ADC1, 0);

ADC_SetChannelConfig(ADC1, 0, BOARD_ADC1_channels_config);

ADC_SetChannelConfig(ADC1, 1, BOARD_ADC1_channels_config);

volatile static int i = 0 ;

/* Enter an infinite loop, just incrementing a counter. */

while(1) {

i++ ;

/* 'Dummy' NOP to allow source level single stepping of

tight while() loop */

__asm volatile ("nop");

}

return 0 ;

}

whats wrong in my code help me out

regards

Sandeep C

@IMXRT1050 @michael_imxrt @IMXRT1050 @imxrt1062_PWM

Miguel04 · ‎08-07-2023

Hi @sandeepc

Please review de configuration of the SDK example evkmimxrt1064_adc_12b1msps_sar_polling and replicate it to different channels.

I don't understand why you have &BOARD_ADC1_channels_config[0] on ADC_SetChannelConfig.

Also you can use ConfigTools to do the configuration.

Best Regards, Miguel.

sandeepc · ‎08-07-2023

ok let me try in polling method, but our application we are preferring for interrupt is there any method for aquring more than 2channels in interrupt method.

@Miguel04

Miguel04 · ‎08-08-2023

Hi @sandeepc

On the SDK files you can find the adc interrupt example too.

Best Regards, Miguel.

sandeepc · ‎08-03-2023

The channel groups are used in a "ping-pong" approach to control the ADC operation. At any point, only one of the channel groups is actively controlling ADC conversions. The channel group 0 is used for both software and hardware trigger modes. Channel groups 1 and greater indicate potentially multiple channel group registers for use only in hardware trigger mode.

None of the channel groups 1 or greater are used for software trigger operation

In software trigger mode as i referred to understand how api actually works i gone through this it says like above https://mcuxpresso.nxp.com/api_doc/dev/721/group__adc__12b1msps__sar.html#ga2036da14750059b15c079e2c...

but in software trigger if i want read the multiple channels how can i retrieve the multiple channels adc results because if configure like below

ADC_SetChannelConfig(ADC1, 0, &BOARD_ADC1_channels_config[0]); ==>IN 6 ADC1
ADC_SetChannelConfig(ADC1, 0, &BOARD_ADC1_channels_config[1]); ==>IN 5 ADC1

data will place in to the base-> r register if i want to read IN 5 ADC1 how can i read because both IN 6 and IN5 has channel group 0 it point to same indexes please can you justify how to difretiate it

i tried like below also

/*

*

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* are permitted provided that the following conditions are met:

*

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* of conditions and the following disclaimer.

*

* o Redistributions in binary form must reproduce the above copyright notice, this

* list of conditions and the following disclaimer in the documentation and/or

* other materials provided with the distribution.

*

* o Neither the name of NXP Semiconductor, Inc. nor the names of its

* contributors may be used to endorse or promote products derived from this

* software without specific prior written permission.

*

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR

* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

/**

* @file adc_2_1.c

* @brief Application entry point.

*/

#include <stdio.h>

#include "board.h"

#include "peripherals.h"

#include "pin_mux.h"

#include "clock_config.h"

#include "MIMXRT1064.h"

#include "fsl_debug_console.h"

/* TODO: insert other include files here. */

/* TODO: insert other definitions and declarations here. */

volatile uint32_t g_AdcConversionValue[2],g_AdcConversionValue1;

static int i=0;

/*

* @brief Application entry point.

*/

/* ADC1_IRQn interrupt handler */

void BOARD_ADC1_IRQHANDLER(void)

{

g_AdcConversionValue[i++] = ADC_GetChannelConversionValue(ADC1, 0);

ADC_SetChannelConfig(ADC1, 0, &BOARD_ADC1_channels_config[i]);

if(i == 2)

i=0;

}

int main(void) {

/* Init board hardware. */

BOARD_ConfigMPU();

BOARD_InitBootPins();

BOARD_InitBootClocks();

BOARD_InitBootPeripherals();

#ifndef BOARD_INIT_DEBUG_CONSOLE_PERIPHERAL

/* Init FSL debug console. */

BOARD_InitDebugConsole();

#endif

PRINTF("Hello World\n");

ADC_SetChannelConfig(ADC1, 0, &BOARD_ADC1_channels_config[0]);

/* Force the counter to be placed into memory. */

volatile static int i = 0 ;

/* Enter an infinite loop, just incrementing a counter. */

while(1) {

i++ ;

/* 'Dummy' NOP to allow source level single stepping of

tight while() loop */

__asm volatile ("nop");

}

return 0 ;

}

static inline uint32_t ADC_GetChannelConversionValue(ADC_Type *base, uint32_t channelGroup)
{
assert(channelGroup < (uint32_t)FSL_FEATURE_ADC_CONVERSION_CONTROL_COUNT);

return base->R[channelGroup];
}

@miguel