MSP432P401R: ADC用DMA传输数据只传输了一次就会停止

/*
 * -------------------------------------------
 *    MSP432 DriverLib - v3_10_00_09 
 * -------------------------------------------
 *
 * --COPYRIGHT--,BSD,BSD
 * Copyright (c) 2014, 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, CCR0
 * and CCR1 are configured to generate a PWM. The CCR0 value is 999 and CCR1 is
 * set to 996, resulting in a PWM of 1ms period and positive duty cycly of 4us.
 *
 * The PWM is started once the GPIO interrupt for P1.1 is serviced.
 *
 *                MSP432P401
 *             ------------------
 *         /|\|                  |
 *          | |                  |
 *          --|RST         P5.5  |<--- A0 (Analog Input)
 *            |                  |
 *            |            P1.1  |<--- GPIO trigger to Start conversions
 *            |                  |
 *            |            P1.0  |---> Debug port to show ADC ISR
 *            |            P2.4  |---> Debug TA0.1, ADC trigger
 *            |                  |
 *
 * Author: T. Logan/ C. Sterzik
 ******************************************************************************/
/* DriverLib Includes */
#include "driverlib.h"

/* Standard Includes */
#include <stdint.h>
#include <stdbool.h>

/*
 * Timer_A Compare Configuration Parameter
 * CCR1 is used to trigger the ADC14, conversion time
 * is defined by the resolution
 * 14bit -> 16 cycles + 1 cycle (SLAU356d, 20.2.8.3)
 * 12bit -> 14 cycles + 1 cycle
 * 10bit -> 11 cycles + 1 cycle
 *  8bit ->  9 cycles + 1 cycle
 *
 *  In this example, 14-bit resolution at 24Mhz ~708ns conversion time
 *  Sample time is defined by high phase ~4us
 *  Sample period is 1000/1Mhz = 1ms
 */
const Timer_A_PWMConfig timerA_PWM =
{
    .clockSource = TIMER_A_CLOCKSOURCE_SMCLK,
    .clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_24,
    .timerPeriod = 999,
    .compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_1,
    .compareOutputMode TIMER_A_OUTPUTMODE_SET_RESET,
    .dutyCycle = 996
};

/* Statics */
static volatile uint_fast16_t resultsBuffer[256];
static volatile uint8_t resPos;

int main(void)
{
    /* Halting WDT  */
    MAP_WDT_A_holdTimer();
    MAP_Interrupt_enableSleepOnIsrExit();
    resPos = 0;

    /* Starting HFXT in non-bypass mode without a timeout. Before we start
      * we have to change VCORE to 1 to support the 48MHz frequency */
    MAP_PCM_setCoreVoltageLevel(PCM_VCORE1);
    MAP_FlashCtl_setWaitState(FLASH_BANK0, 1);
    MAP_FlashCtl_setWaitState(FLASH_BANK1, 1);

    /*
     * Setting up clocks
     * MCLK = MCLK = 48MHz
     * SMCLK = MCLK/2 = 24Mhz
     * ACLK = REFO = 32Khz
     */
    MAP_CS_setDCOFrequency(48000000);
    MAP_CS_initClockSignal(CS_ACLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_1);
    MAP_CS_initClockSignal(CS_SMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_2);
    MAP_CS_initClockSignal(CS_MCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_1);

    /* Initializing ADC (SMCLK/1/1) */
    MAP_ADC14_enableModule();
    MAP_ADC14_initModule(ADC_CLOCKSOURCE_SMCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1,
            0);

    /*
     * Debug
     * Configuring P1.0 as output
     */
    MAP_GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN0);
    P1OUT &= ~BIT0;

    /*
     * Configuring GPIOs (5.5 A0)
     */
    MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5, GPIO_PIN5,
    GPIO_TERTIARY_MODULE_FUNCTION);

    /*
     * Debug: set TA0.1 as output to see ADC trigger signal
     */
    MAP_GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P2, GPIO_PIN4,
    GPIO_PRIMARY_MODULE_FUNCTION);

    /*
     * Configuring P1.1 as an input and enabling interrupt, the timer is started from
     * GPIO ISR.
     */
    MAP_GPIO_setAsInputPinWithPullUpResistor(GPIO_PORT_P1, GPIO_PIN1);
    MAP_GPIO_interruptEdgeSelect(GPIO_PORT_P1,GPIO_PIN1,GPIO_HIGH_TO_LOW_TRANSITION);
    MAP_GPIO_clearInterruptFlag(GPIO_PORT_P1, GPIO_PIN1);
    MAP_GPIO_enableInterrupt(GPIO_PORT_P1, GPIO_PIN1);
    MAP_Interrupt_enableInterrupt(INT_PORT1);

    /*
     * Configuring ADC Memory, repeat-single-channel, A0
     */
    MAP_ADC14_configureSingleSampleMode(ADC_MEM0, true);
    /*
     * Configuring ADC Memory, reference, and single ended conversion
     * A0 goes to mem0, AVcc is the reference, and the conversion is
     * single-ended
     */
    MAP_ADC14_configureConversionMemory(ADC_MEM0, ADC_VREFPOS_AVCC_VREFNEG_VSS,
    ADC_INPUT_A0, false);
    /*
     * Configuring the sample trigger to be sourced from Timer_A0 CCR1 and on the
     * rising edge, default samplemode is extended (SHP=0)
     */
    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();

    /* Going to sleep */
    MAP_PCM_gotoLPM0();

    while(1);
}

/* 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)
	{
		resultsBuffer[resPos++] = MAP_ADC14_getResult(ADC_MEM0);
		if(resPos == 0)
		{
			P1OUT |= BIT0;
			MAP_Timer_A_stopTimer(TIMER_A0_BASE);
			MAP_Timer_A_clearTimer(TIMER_A0_BASE);
			P1OUT &= ~BIT0;
		}
	}
}

void PORT1_IRQHandler(void)
{
	if(P1->IV == 4)
	{
		P1OUT |= BIT0;
		while(P1->IFG & BIT1)
		{
			P1->IFG &= ~BIT1;
		}
		    MAP_Timer_A_generatePWM(TIMER_A0_BASE, &timerA_PWM);
		P1OUT &= ~BIT0;
	}
}

void DMA_INT1_IRQHandler(void)
{
    __no_operation();
}

/*
 * -------------------------------------------
 *    MSP432 DriverLib - v3_10_00_09 
 * -------------------------------------------
 *
 * --COPYRIGHT--,BSD,BSD
 * Copyright (c) 2014, 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, CCR0
 * and CCR1 are configured to generate a PWM. The CCR0 value is 23 and CCR1 is
 * set to 11, resulting in a PWM of 1us period.  The sample time is driven by
 * the ADC clock and not the PWM duty cycle.
 *
 * The PWM is started once the GPIO interrupt for P1.1 is serviced.
 *
 *                MSP432P401
 *             ------------------
 *         /|\|                  |
 *          | |                  |
 *          --|RST         P5.5  |<--- A0 (Analog Input)
 *            |                  |
 *            |            P1.1  |<--- GPIO trigger to Start conversions
 *            |                  |
 *            |            P1.0  |---> Debug port to show DMA ISR
 *            |            P2.4  |---> Debug TA0.1, ADC trigger
 *            |                  |
 *
 * Author: Timothy Logan/ C. Sterzik
 ******************************************************************************/
/* DriverLib Includes */
#include "driverlib.h"

/* Standard Includes */
#include <stdint.h>
#include <stdbool.h>

#define ARRAY_LENGTH	256

/*
 * Timer_A Compare Configuration Parameter
 * CCR1 is used to trigger the ADC14, conversion time
 * is defined by the resolution
 * 14bit -> 16 cycles + 1 cycle (SLAU356d, 20.2.8.3)
 * 12bit -> 14 cycles + 1 cycle
 * 10bit -> 11 cycles + 1 cycle
 *  8bit ->  9 cycles + 1 cycle
 *
 *  In this example, 14-bit resolution at 24Mhz ~708ns conversion time
 *  Sample time is defined by 4 ADC clocks
 *  Sample period is 24/24Mhz = 1us
 */
const Timer_A_PWMConfig timerA_PWM =
{
    .clockSource = TIMER_A_CLOCKSOURCE_SMCLK,
    .clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_1,
    .timerPeriod = 23,
    .compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_1,
    .compareOutputMode TIMER_A_OUTPUTMODE_SET_RESET,
    .dutyCycle = 11
};

/* DMA Control Table */
#if defined(__TI_COMPILER_VERSION__)
#pragma DATA_ALIGN(MSP_EXP432P401RLP_DMAControlTable, 1024)
#elif defined(__IAR_SYSTEMS_ICC__)
#pragma data_alignment=1024
#elif defined(__GNUC__)
__attribute__ ((aligned (1024)))
#elif defined(__CC_ARM)
__align(1024)
#endif
static DMA_ControlTable MSP_EXP432P401RLP_DMAControlTable[16];

/* Statics */
static volatile uint16_t resultsBufferPrimary[ARRAY_LENGTH];
static volatile uint16_t resultsBufferAlternate[ARRAY_LENGTH];

int main(void)
{
    /* Halting WDT  */
    MAP_WDT_A_holdTimer();
    MAP_Interrupt_enableSleepOnIsrExit();

    /* Starting HFXT in non-bypass mode without a timeout. Before we start
      * we have to change VCORE to 1 to support the 48MHz frequency */
    MAP_PCM_setCoreVoltageLevel(PCM_VCORE1);
    MAP_FlashCtl_setWaitState(FLASH_BANK0, 1);
    MAP_FlashCtl_setWaitState(FLASH_BANK1, 1);

    /*
     * Setting up clocks
     * MCLK = MCLK = 48MHz
     * SMCLK = MCLK/2 = 24Mhz
     * ACLK = REFO = 32Khz
     */
    MAP_CS_setDCOFrequency(48000000);
    MAP_CS_initClockSignal(CS_ACLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_1);
    MAP_CS_initClockSignal(CS_SMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_2);
    MAP_CS_initClockSignal(CS_MCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_1);

    /* Initializing ADC (SMCLK/1/1) */
    MAP_ADC14_enableModule();
    MAP_ADC14_initModule(ADC_CLOCKSOURCE_SMCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1,
            0);

    /*
     * Debug
     * Configuring P1.0 as output
     */
    MAP_GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN0);
    P1OUT &= ~BIT0;

    /*
     * Configuring GPIOs (5.5 A0)
     */
    MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5, GPIO_PIN5,
    GPIO_TERTIARY_MODULE_FUNCTION);

    /*
     * Debug: set TA0.1 as output to see ADC trigger signal
     */
    MAP_GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P2, GPIO_PIN4,
    GPIO_PRIMARY_MODULE_FUNCTION);

    /*
     * Configuring P1.1 as an input and enabling interrupt, the timer is started from
     * GPIO ISR.
     */
    MAP_GPIO_setAsInputPinWithPullUpResistor(GPIO_PORT_P1, GPIO_PIN1);
    MAP_GPIO_interruptEdgeSelect(GPIO_PORT_P1,GPIO_PIN1,GPIO_HIGH_TO_LOW_TRANSITION);
    MAP_GPIO_clearInterruptFlag(GPIO_PORT_P1, GPIO_PIN1);
    MAP_GPIO_enableInterrupt(GPIO_PORT_P1, GPIO_PIN1);

    /*
     * Configuring ADC Memory, repeat-single-channel, A0
     */
    MAP_ADC14_configureSingleSampleMode(ADC_MEM0, true);
    /*
     * Configuring ADC Memory, reference, and single ended conversion
     * A0 goes to mem0, AVcc is the reference, and the conversion is
     * single-ended
     */
    MAP_ADC14_configureConversionMemory(ADC_MEM0, ADC_VREFPOS_AVCC_VREFNEG_VSS,
    ADC_INPUT_A0, false);
    /*
     * Configuring the sample trigger to be sourced from Timer_A0 CCR1 and on the
     * rising edge, default samplemode is extended (SHP=0)
     */
    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();

    /* Configuring DMA module */
    MAP_DMA_enableModule();
    MAP_DMA_setControlBase(MSP_EXP432P401RLP_DMAControlTable);

    /*
     * Setup the DMA + ADC14 interface
     */
    MAP_DMA_disableChannelAttribute(DMA_CH7_ADC14,
                                 UDMA_ATTR_ALTSELECT | UDMA_ATTR_USEBURST |
                                 UDMA_ATTR_HIGH_PRIORITY |
                                 UDMA_ATTR_REQMASK);

    /*
     * Setting Control Indexes. In this case we will set the source of the
     * DMA transfer to ADC14 Memory 0 and the destination to the destination
     * data array.
     */
    MAP_DMA_setChannelControl(UDMA_PRI_SELECT | DMA_CH7_ADC14,
    		UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1);
    MAP_DMA_setChannelTransfer(UDMA_PRI_SELECT | DMA_CH7_ADC14,
    		UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0],
			(void*)resultsBufferPrimary, ARRAY_LENGTH);
    MAP_DMA_setChannelControl(UDMA_ALT_SELECT | DMA_CH7_ADC14,
    		UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1);
    MAP_DMA_setChannelTransfer(UDMA_ALT_SELECT | DMA_CH7_ADC14,
    		UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0],
			(void*)resultsBufferAlternate, ARRAY_LENGTH);

    /* Assigning/Enabling Interrupts */
    MAP_DMA_assignInterrupt(DMA_INT1, 7);
    MAP_DMA_assignChannel(DMA_CH7_ADC14);
    MAP_DMA_clearInterruptFlag(7);

    /* Enabling Interrupts */
    MAP_Interrupt_enableInterrupt(INT_DMA_INT1);
    MAP_Interrupt_enableInterrupt(INT_PORT1);
    MAP_Interrupt_enableMaster();

    /* Going to sleep */
    MAP_PCM_gotoLPM0();
    __no_operation();
}

/* Completion interrupt for ADC14 MEM0 */
__attribute__((ramfunc))  // Requires compiler TI v15.12.1.LTS
void DMA_INT1_IRQHandler(void)
{
	MAP_Timer_A_stopTimer(TIMER_A0_BASE);
    MAP_DMA_disableChannel(7);
    P1->OUT |= BIT0;
    /*
     * Switch between primary and alternate bufferes with DMA's PingPong mode
     */
    if (MAP_DMA_getChannelAttribute(7) & UDMA_ATTR_ALTSELECT)
    {
//        MAP_DMA_setChannelControl(UDMA_PRI_SELECT | DMA_CH7_ADC14,
//        		UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1);
//        MAP_DMA_setChannelTransfer(UDMA_PRI_SELECT | DMA_CH7_ADC14,
//        		UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0],
//    			resultsBufferPrimary, ARRAY_LENGTH);
    	MSP_EXP432P401RLP_DMAControlTable[7].control =
    			(MSP_EXP432P401RLP_DMAControlTable[7].control & 0xff000000 ) |
				(((ARRAY_LENGTH)-1)<<4) | 0x03;
    }
    else
    {
//        MAP_DMA_setChannelControl(UDMA_ALT_SELECT | DMA_CH7_ADC14,
//        		UDMA_SIZE_16 | UDMA_SRC_INC_NONE | UDMA_DST_INC_16 | UDMA_ARB_1);
//        MAP_DMA_setChannelTransfer(UDMA_ALT_SELECT | DMA_CH7_ADC14,
//        		UDMA_MODE_PINGPONG, (void*) &ADC14->MEM[0],
//    			resultsBufferAlternate, ARRAY_LENGTH);
    	MSP_EXP432P401RLP_DMAControlTable[15].control =
    			(MSP_EXP432P401RLP_DMAControlTable[15].control & 0xff000000 ) |
				(((ARRAY_LENGTH)-1)<<4) | 0x03;
    }
    P1->OUT &= ~BIT0;
}

void PORT1_IRQHandler(void)
{
    P1->OUT |= BIT0;
    P1IFG &= ~BIT1;
    MAP_DMA_enableChannel(7);
    MAP_Timer_A_generatePWM(TIMER_A0_BASE, &timerA_PWM);
    P1->OUT &= ~BIT0;
}