TI中文支持网Part Number: MSP432P401R
Susan Yang：
请您参考下面的2个代码
第一个示例使用定时器来控制采样时间（extended sample mode），第二个示例使用脉冲采样模式 1Msps （也使用 DMA）。
/** -------------------------------------------*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*------------------*/|\||*| ||*--|RSTP5.5|<--- 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*------------------*/|\||*| ||*--|RSTP5.5|<--- 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; }
,
KUANG XIN：
有没有不需要DMA中断的，必须要用DMA中断pingpong模式才能连续传输ADC采样数据吗？
,
Susan Yang：
KUANG XIN 说：有没有不需要DMA中断的，
您可以在下面路径找到
C:\ti\simplelink_msp432p4_sdk_3_40_01_02\examples\nortos\MSP_EXP432P401R\driverlib
如 adc14_multiple_channel_no_repeat
