2020年04月05日 | MSP432 开发环境

安装CCS9.2,SDK包。

https://e2echina.ti.com/question_answer/microcontrollers/msp430/f/55/t/179621

SDK开发查找函数：

http://dev.ti.com/tirex/content/simplelink_msp432_sdk_1_30_00_40/docs/driverlib/msp432p4xx/html/driverlib_html/modules.html

开ADC 和开1s定时器A中断：

// *          --|RST         P5.5  |<--- A0 (Analog Input)

// *     |                     P1.0|-->LED

/* DriverLib Includes */

#include

/* Standard Includes */

#include

#include

/* Statics */

static volatile uint16_t curADCResult;

static volatile float normalizedADCRes;

/* Timer_A UpMode Configuration Parameter */

const Timer_A_UpModeConfig upConfig = {

        TIMER_A_CLOCKSOURCE_ACLK,          //aclk

        TIMER_A_CLOCKSOURCE_DIVIDER_1,        //32768hz

        32768,                        // 1 s clock

        TIMER_A_TAIE_INTERRUPT_DISABLE,         // Disable Timer interrupt

        TIMER_A_CCIE_CCR0_INTERRUPT_ENABLE,    // Enable CCR0 interrupt

        TIMER_A_DO_CLEAR                        // Clear value

        };

int main(void)

{

    /* Halting the Watchdog  */

    MAP_WDT_A_holdTimer();

    /* Initializing Variables */

    curADCResult = 0;

    /* Setting Flash wait state */

    MAP_FlashCtl_setWaitState(FLASH_BANK0, 1);

    MAP_FlashCtl_setWaitState(FLASH_BANK1, 1);

    /* Setting DCO to 48MHz  */

    MAP_PCM_setPowerState(PCM_AM_LDO_VCORE1);

    MAP_CS_setDCOCenteredFrequency(CS_DCO_FREQUENCY_48);

    /* Enabling the FPU for floating point operation */

    MAP_FPU_enableModule();

    MAP_FPU_enableLazyStacking();

    //![Single Sample Mode Configure]

    /* Initializing ADC (MCLK/1/4) */

    MAP_ADC14_enableModule();

    MAP_ADC14_initModule(ADC_CLOCKSOURCE_MCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_4,

                         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 Sample Timer */

    MAP_ADC14_enableSampleTimer(ADC_MANUAL_ITERATION);

    /* Enabling/Toggling Conversion */

    MAP_ADC14_enableConversion();

    MAP_ADC14_toggleConversionTrigger();

    //![Single Sample Mode Configure]

    /* Enabling interrupts */

    MAP_ADC14_enableInterrupt(ADC_INT0);

    MAP_Interrupt_enableInterrupt(INT_ADC14);

    /* Configuring Timer_A1 for Up Mode */

    MAP_Timer_A_configureUpMode(TIMER_A1_BASE, &upConfig);

    /* Enabling interrupts and starting the timer */

    MAP_Interrupt_enableSleepOnIsrExit();

    MAP_Interrupt_enableInterrupt(INT_TA1_0);

    MAP_Timer_A_startCounter(TIMER_A1_BASE, TIMER_A_UP_MODE);

    /* Configuring P1.0 as output */

    MAP_GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN0);

    MAP_GPIO_setOutputLowOnPin(GPIO_PORT_P1, GPIO_PIN0);

    /* Enabling MASTER interrupts */

    MAP_Interrupt_enableMaster();

    while (1)

    {

        //MAP_PCM_gotoLPM0();

    }

}

void ADC14_IRQHandler(void)

{

    uint64_t status = MAP_ADC14_getEnabledInterruptStatus();

    MAP_ADC14_clearInterruptFlag(status);

    if (ADC_INT0 & status)

    {

        curADCResult = MAP_ADC14_getResult(ADC_MEM0);

        normalizedADCRes = (curADCResult * 3.3) / 16384; //normalizedADCRes就是最后电压

        MAP_ADC14_toggleConversionTrigger();

    }

}

void TA1_0_IRQHandler(void)

{

    MAP_GPIO_toggleOutputOnPin(GPIO_PORT_P1, GPIO_PIN0);

    MAP_Timer_A_clearCaptureCompareInterrupt(TIMER_A1_BASE,TIMER_A_CAPTURECOMPARE_REGISTER_0);

}