MSP432P401R 使用ADC时触发源使用Timer_A0，遇到如下问题

Susan Yang：

不知您是否有参考过TI的例程 adc14_single_conversion_repeat_timera_source？

这个是通过Timer_A module来触发 ADC的

/* --COPYRIGHT--,BSD* Copyright (c) 2017, Texas Instruments Incorporated* All rights reserved.** Redistribution and use in source and binary forms, with or without* modification, are permitted provided that the following conditions* are met:** *Redistributions of source code must retain the above copyright*notice, this list of conditions and the following disclaimer.** *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.** *Neither the name of Texas Instruments Incorporated 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 OWNER 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; LOSS OF USE, DATA, OR PROFITS;* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 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.* --/COPYRIGHT--*/
/******************************************************************************** MSP432 ADC14 - Single Channel Continuous Sample w/ Timer_A Trigger** Description: In this ADC14 code example, a single input channel is sampled* using the standard 3.3v reference. The source of the sample trigger for this* example is Timer_A CCR1. The ADC is setup to continuously sample/convert* from A0 when the trigger starts and store the results in resultsBuffer (it* is setup to be a circular buffer where resPos overflows to 0). Timer_A is* setup in Up mode and a Compare value of 16384is set as the compare trigger*and reset trigger. Once the Timer_A is started, after 0.5s it will trigger* the ADC14 to start conversions. Essentially this example will use* the Timer_A module to trigger an ADC conversion every 0.5 seconds.**MSP432P401*------------------*/|\||*| ||*--|RSTP5.5|<--- A0 (Analog Input)*||*||*||*||*||*******************************************************************************/
/* DriverLib Includes */
#include <ti/devices/msp432p4xx/driverlib/driverlib.h>/* Standard Includes */
#include <stdint.h>
#include <stdbool.h>/* Timer_A Continuous Mode Configuration Parameter */
const Timer_A_UpModeConfig upModeConfig =
{TIMER_A_CLOCKSOURCE_ACLK,// ACLK Clock SourceTIMER_A_CLOCKSOURCE_DIVIDER_1,// ACLK/1 = 32Khz16384,TIMER_A_TAIE_INTERRUPT_DISABLE,// Disable Timer ISRTIMER_A_CCIE_CCR0_INTERRUPT_DISABLE, // Disable CCR0TIMER_A_DO_CLEAR// Clear Counter
};/* Timer_A Compare Configuration Parameter */
const Timer_A_CompareModeConfig compareConfig =
{TIMER_A_CAPTURECOMPARE_REGISTER_1,// Use CCR1TIMER_A_CAPTURECOMPARE_INTERRUPT_DISABLE,// Disable CCR interruptTIMER_A_OUTPUTMODE_SET_RESET,// Toggle output but16384// 16000 Period
};/* Statics */
static volatile uint_fast16_t resultsBuffer[UINT8_MAX];
static volatile uint8_t resPos;int main(void)
{/* Halting WDT*/MAP_WDT_A_holdTimer();MAP_Interrupt_enableSleepOnIsrExit();resPos = 0;/* Setting up clocks* MCLK = MCLK = 3MHz* ACLK = REFO = 32Khz */MAP_CS_initClockSignal(CS_ACLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_1);/* Initializing ADC (MCLK/1/1) */MAP_ADC14_enableModule();MAP_ADC14_initModule(ADC_CLOCKSOURCE_MCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1,0);/* Configuring GPIOs (5.5 A0) */MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5, GPIO_PIN5,GPIO_TERTIARY_MODULE_FUNCTION);/* Configuring ADC Memory */MAP_ADC14_configureSingleSampleMode(ADC_MEM0, true);MAP_ADC14_configureConversionMemory(ADC_MEM0, ADC_VREFPOS_AVCC_VREFNEG_VSS,ADC_INPUT_A0, false);/* Configuring Timer_A in continuous mode and sourced from ACLK */MAP_Timer_A_configureUpMode(TIMER_A0_BASE, &upModeConfig);/* Configuring Timer_A0 in CCR1 to trigger at 16000 (0.5s) */MAP_Timer_A_initCompare(TIMER_A0_BASE, &compareConfig);/* Configuring the sample trigger to be sourced from Timer_A0and setting it* to automatic iteration after it is triggered*/MAP_ADC14_setSampleHoldTrigger(ADC_TRIGGER_SOURCE1, false);/* Enabling the interrupt when a conversion on channel 1 is complete and* enabling conversions */MAP_ADC14_enableInterrupt(ADC_INT0);MAP_ADC14_enableConversion();/* Enabling Interrupts */MAP_Interrupt_enableInterrupt(INT_ADC14);MAP_Interrupt_enableMaster();/* Starting the Timer */MAP_Timer_A_startCounter(TIMER_A0_BASE, TIMER_A_UP_MODE);/* Going to sleep */while (1){MAP_PCM_gotoLPM0();}
}/* This interrupt is fired whenever a conversion is completed and placed in* ADC_MEM0 */
void ADC14_IRQHandler(void)
{uint64_t status;status = MAP_ADC14_getEnabledInterruptStatus();MAP_ADC14_clearInterruptFlag(status);if (status & ADC_INT0){if(resPos == UINT8_MAX){resPos = 0;}resultsBuffer[resPos++] = MAP_ADC14_getResult(ADC_MEM0);}}

Kevin Chen81：

回复 Susan Yang:

Hi Susan,

客户有试过这个例程，这个程序的功能是采集了一个通道的ADC(A0通道)。客户改进的程序的是Timer_A触发ADC转换时，需要采集多个ADC通道的数据（A0-A4）,修改后的程序的问题是，仅能采集一遍A0-A4，之后程序就终止了，无法继续定时采集第二轮。

程序如下，您帮忙给看看。

/** -------------------------------------------*MSP432 DriverLib - v3_21_00_05* -------------------------------------------** --COPYRIGHT--,BSD,BSD* Copyright (c) 2016, Texas Instruments Incorporated* All rights reserved.** Redistribution and use in source and binary forms, with or without* modification, are permitted provided that the following conditions* are met:** *Redistributions of source code must retain the above copyright*notice, this list of conditions and the following disclaimer.** *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.** *Neither the name of Texas Instruments Incorporated 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 OWNER 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; LOSS OF USE, DATA, OR PROFITS;* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 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.* --/COPYRIGHT--*/
/******************************************************************************** MSP432 ADC14 - Single Channel Continuous Sample w/ Timer_A Trigger** Description: In this ADC14 code example, a single input channel is sampled* using the standard 3.3v reference. The source of the sample trigger for this* example is Timer_A CCR1. The ADC is setup to continuously sample/convert* from A0 when the trigger starts and store the results in resultsBuffer (it* is setup to be a circular buffer where resPos overflows to 0). Timer_A is* setup in Up mode and a Compare value of 16384is set as the compare trigger*and reset trigger. Once the Timer_A is started, after 0.5s it will trigger* the ADC14 to start conversions. Essentially this example will use* the Timer_A module to trigger an ADC conversion every 0.5 seconds.**MSP432P401*------------------*/|\||*| ||*--|RSTP5.5|<--- A0 (Analog Input)*||*||*||*||*||** Author: Timothy Logan******************************************************************************/
/* DriverLib Includes */
#include "driverlib.h"/* Standard Includes */
#include <stdint.h>#include <stdbool.h>/* Timer_A Continuous Mode Configuration Parameter */
const Timer_A_UpModeConfig upModeConfig =
{TIMER_A_CLOCKSOURCE_ACLK,// ACLK Clock SourceTIMER_A_CLOCKSOURCE_DIVIDER_1,// ACLK/1 = 32Khz16384,TIMER_A_TAIE_INTERRUPT_DISABLE,// Disable Timer ISRTIMER_A_CCIE_CCR0_INTERRUPT_DISABLE, // Disable CCR0TIMER_A_DO_CLEAR// Clear Counter
};/* Timer_A Compare Configuration Parameter */
const Timer_A_CompareModeConfig compareConfig =
{TIMER_A_CAPTURECOMPARE_REGISTER_1,// Use CCR1TIMER_A_CAPTURECOMPARE_INTERRUPT_DISABLE,// Disable CCR interruptTIMER_A_OUTPUTMODE_SET_RESET,// Toggle output but16384// 16000 Period
};/* Statics */
//static volatile uint_fast16_t resultsBuffer[UINT8_MAX];
//static volatile uint8_t resPos;staticuint16_t resultsBuffer[UINT8_MAX];
staticuint16_t *results=resultsBuffer;int main(void)
{/* Halting WDT*/MAP_WDT_A_holdTimer();MAP_Interrupt_enableSleepOnIsrExit();// resPos = 0;/* Setting up clocks* MCLK = MCLK = 3MHz* ACLK = REFO = 32Khz */MAP_CS_initClockSignal(CS_ACLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_1);/* Initializing ADC (MCLK/1/1) */MAP_ADC14_enableModule();MAP_ADC14_initModule(ADC_CLOCKSOURCE_MCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1,0);/* Configuring GPIOs (5.5 A0) */
//MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5, GPIO_PIN5,
//GPIO_TERTIARY_MODULE_FUNCTION);/* Configuring ADC Memory */
//MAP_ADC14_configureSingleSampleMode(ADC_MEM0, true);
//MAP_ADC14_configureConversionMemory(ADC_MEM0, ADC_VREFPOS_AVCC_VREFNEG_VSS,
//ADC_INPUT_A0, false);/* Configuring GPIOs for Analog In */MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5,GPIO_PIN5 | GPIO_PIN4 | GPIO_PIN3 | GPIO_PIN2 | GPIO_PIN1,GPIO_TERTIARY_MODULE_FUNCTION);/* Configuring ADC Memory (ADC_MEM0 - ADC_MEM7 (A0 - A7)with no repeat)* with internal 2.5v reference */MAP_ADC14_configureMultiSequenceMode(ADC_MEM0, ADC_MEM4, false);MAP_ADC14_configureConversionMemory(ADC_MEM0,ADC_VREFPOS_INTBUF_VREFNEG_VSS,ADC_INPUT_A0, false);MAP_ADC14_configureConversionMemory(ADC_MEM1,ADC_VREFPOS_INTBUF_VREFNEG_VSS,ADC_INPUT_A1, false);MAP_ADC14_configureConversionMemory(ADC_MEM2,ADC_VREFPOS_INTBUF_VREFNEG_VSS,ADC_INPUT_A2, false);MAP_ADC14_configureConversionMemory(ADC_MEM3,ADC_VREFPOS_INTBUF_VREFNEG_VSS,ADC_INPUT_A3, false);MAP_ADC14_configureConversionMemory(ADC_MEM4,ADC_VREFPOS_INTBUF_VREFNEG_VSS,ADC_INPUT_A4, false);/* Configuring Timer_A in continuous mode and sourced from ACLK */MAP_Timer_A_configureUpMode(TIMER_A0_BASE, &upModeConfig);/* Configuring Timer_A0 in CCR1 to trigger at 16000 (0.5s) */MAP_Timer_A_initCompare(TIMER_A0_BASE, &compareConfig);/* Configuring the sample trigger to be sourced from Timer_A0and setting it* to automatic iteration after it is triggered*/MAP_ADC14_setSampleHoldTrigger(ADC_TRIGGER_SOURCE1, false);MAP_ADC14_enableSampleTimer(ADC_AUTOMATIC_ITERATION);/* Enabling the interrupt when a conversion on channel 1 is complete and* enabling conversions */MAP_ADC14_enableInterrupt(ADC_INT4);MAP_ADC14_enableConversion();/* Enabling Interrupts */MAP_Interrupt_enableInterrupt(INT_ADC14);MAP_Interrupt_enableMaster();/* Starting the Timer */MAP_Timer_A_startCounter(TIMER_A0_BASE, TIMER_A_UP_MODE);/* Going to sleep */while (1){MAP_PCM_gotoLPM0();}
}/* This interrupt is fired whenever a conversion is completed and placed in* ADC_MEM0 */
void ADC14_IRQHandler(void)
{uint64_t status;status = MAP_ADC14_getEnabledInterruptStatus();MAP_ADC14_clearInterruptFlag(status);if (status & ADC_INT4){//resultsBuffer[resPos++] = MAP_ADC14_getResult(ADC_MEM0);MAP_ADC14_getMultiSequenceResult(results);results=results+5;}}

Susan Yang：

回复 Kevin Chen81:

建议您先尝试单通道repeat采样，而后再加其他通道尝试。这样便于定位问题的所在

单通道repeat采样可以参考 adc14_single_conversion_repeat

Kevin Chen81：

回复 Susan Yang:

Hi Susan,

再咨询您一个问题，用TA0_C1去触发ADC，一旦设置完成，TA0_C1是只触发一次吗？还是TA0_C1可以按设定的定时周期，可以重复触发ADC转换。比如TA0_C1触发周期设置为5S, 是否可以保证每隔5S都可以TA0_C1去触发一次ADC呢？

Kervin Chen

Susan Yang：

回复 Kevin Chen81:

可以重复触发的

yuyinfeng1982：

回复 Susan Yang:

应该是  UNi FLASH是吧