CC3200-UART-ADC-PWM

在CC3200SDK-1.2.0上测试可用，下面是main函数的代码：

注意：需使用example adc project 进行代码融合

//采集电压以PWM的方式输出，串口接收相关指令，执行相关操作，显示相关信息

#include 
#include 
#include 
#include 

#include "utils.h"
#include "hw_memmap.h"
#include "hw_common_reg.h"
#include "hw_types.h"
#include "hw_adc.h"
#include "hw_ints.h"
#include "hw_gprcm.h"
#include "rom.h"
#include "rom_map.h"
#include "interrupt.h"
#include "prcm.h"
#include "uart.h"
#include "pinmux.h"
#include "pin.h"
#include "adc.h"
#include "gpio.h"

#include "adc_userinput.h"
#include "uart_if.h"
#include "gpio_if.h"

#include "hw_apps_rcm.h"
#include "timer.h"

#define USER_INPUT 
#define UART_PRINT         Report
#define FOREVER            1
#define APP_NAME           "ADC Reference"
#define NO_OF_SAMPLES      128

#define CONSOLE              UARTA0_BASE
#define UartGetChar()        MAP_UARTCharGet(CONSOLE)
#define UartPutChar(c)       MAP_UARTCharPut(CONSOLE,c)

unsigned long pulAdcSamples[4096];

#define TIMER_INTERVAL_RELOAD   40035 /* =(255*157) */
#define DUTYCYCLE_GRANULARITY   157
#define MAX_STRING_LENGTH    80

#if defined(ccs)
extern void (* const g_pfnVectors[])(void);
#endif
#if defined(ewarm)
extern uVectorEntry __vector_table;
#endif

static void BoardInit(void);
static void DisplayBanner(char * AppName);

void UpdateDutyCycle(unsigned long ulBase, unsigned long ulTimer,
                     unsigned char ucLevel)
{
    MAP_TimerMatchSet(ulBase,ulTimer,(ucLevel*DUTYCYCLE_GRANULARITY));
}


void SetupTimerPWMMode(unsigned long ulBase, unsigned long ulTimer,
                       unsigned long ulConfig, unsigned char ucInvert)
{
    MAP_TimerConfigure(ulBase,ulConfig);
    MAP_TimerPrescaleSet(ulBase,ulTimer,0);

    MAP_TimerControlLevel(ulBase,ulTimer,ucInvert);

    MAP_TimerLoadSet(ulBase,ulTimer,TIMER_INTERVAL_RELOAD);

    MAP_TimerMatchSet(ulBase,ulTimer,TIMER_INTERVAL_RELOAD);
}


void InitPWMModules()
{
    MAP_PRCMPeripheralClkEnable(PRCM_TIMERA2, PRCM_RUN_MODE_CLK);
    MAP_PRCMPeripheralClkEnable(PRCM_TIMERA3, PRCM_RUN_MODE_CLK);

    SetupTimerPWMMode(TIMERA2_BASE, TIMER_B,
            (TIMER_CFG_SPLIT_PAIR | TIMER_CFG_B_PWM), 1);

    SetupTimerPWMMode(TIMERA3_BASE, TIMER_A,
            (TIMER_CFG_SPLIT_PAIR | TIMER_CFG_A_PWM | TIMER_CFG_B_PWM), 1);

    SetupTimerPWMMode(TIMERA3_BASE, TIMER_B,
            (TIMER_CFG_SPLIT_PAIR | TIMER_CFG_A_PWM | TIMER_CFG_B_PWM), 1);

    MAP_TimerEnable(TIMERA2_BASE,TIMER_B);
    MAP_TimerEnable(TIMERA3_BASE,TIMER_A);
    MAP_TimerEnable(TIMERA3_BASE,TIMER_B);
}

void DeInitPWMModules()
{

    MAP_TimerDisable(TIMERA2_BASE, TIMER_B);
    MAP_TimerDisable(TIMERA3_BASE, TIMER_A);
    MAP_TimerDisable(TIMERA3_BASE, TIMER_B);
    MAP_PRCMPeripheralClkDisable(PRCM_TIMERA2, PRCM_RUN_MODE_CLK);
    MAP_PRCMPeripheralClkDisable(PRCM_TIMERA3, PRCM_RUN_MODE_CLK);
}

static void
DisplayBanner(char * AppName)
{
    Report("\n\n\n\r");
    Report("\t\t *************************************************\n\r");
    Report("\t\t       CC3200 %s Application       \n\r", AppName);
    Report("\t\t *************************************************\n\r");
    Report("\n\n\n\r");
}

static void
BoardInit(void)
{
#ifndef USE_TIRTOS

#if defined(ccs)
    MAP_IntVTableBaseSet((unsigned long)&g_pfnVectors[0]);
#endif
#if defined(ewarm)
    MAP_IntVTableBaseSet((unsigned long)&__vector_table);
#endif
#endif

    MAP_IntMasterEnable();
    MAP_IntEnable(FAULT_SYSTICK);

    PRCMCC3200MCUInit();
}

void main()
{
    unsigned int  uiChannel;
    unsigned int  uiIndex=0;
    unsigned long ulSample;
    float         Brightness;
    char cString[MAX_STRING_LENGTH+1];
    char cCharacter;
    int iStringLength = 0;

    BoardInit();

    PinMuxConfig();

    InitPWMModules();

    InitTerm();
    DisplayBanner(APP_NAME);

    while(FOREVER)
    {
        uiIndex=0;

#ifdef CC3200_ES_1_2_1
        //
        // Enable ADC clocks.###IMPORTANT###Need to be removed for PG 1.32
        //
        HWREG(GPRCM_BASE + GPRCM_O_ADC_CLK_CONFIG) = 0x00000043;
        HWREG(ADC_BASE + ADC_O_ADC_CTRL) = 0x00000004;
        HWREG(ADC_BASE + ADC_O_ADC_SPARE0) = 0x00000100;
        HWREG(ADC_BASE + ADC_O_ADC_SPARE1) = 0x0355AA00;
#endif

        MAP_PinTypeADC(PIN_58,PIN_MODE_255);
        uiChannel = ADC_CH_1;                                                                 //设置ADC输入通道

        MAP_ADCTimerConfig(ADC_BASE,2^17);

        MAP_ADCTimerEnable(ADC_BASE);

        MAP_ADCEnable(ADC_BASE);

        MAP_ADCChannelEnable(ADC_BASE, uiChannel);

        while(uiIndex < NO_OF_SAMPLES + 4)
        {
            if(MAP_ADCFIFOLvlGet(ADC_BASE, uiChannel))
            {
                ulSample = MAP_ADCFIFORead(ADC_BASE, uiChannel);
                pulAdcSamples[uiIndex++] = ulSample;
            }
        }

        MAP_ADCChannelDisable(ADC_BASE, uiChannel);

        uiIndex = 0;

        UART_PRINT("\n\r");
        Brightness = (((((pulAdcSamples[4+uiIndex] >> 2 ) & 0x0FFF))*1.4)/4096)*100;            //采集电压
        UART_PRINT("%f\n\r",(Brightness));
        UartPutChar(Brightness);                                                                //从串口输出
        MAP_UtilsDelay(80000000);

        cCharacter = UartGetChar();                                                             //从串口输入
//      UartPutChar(cCharacter);
        cString[iStringLength] = cCharacter;
        iStringLength++;

        switch(cString[0])
        {
        case '0':
            UpdateDutyCycle(TIMERA2_BASE, TIMER_B, Brightness);                                 //更新PWM占空比
        break;
        case '1':
            UpdateDutyCycle(TIMERA3_BASE, TIMER_B, Brightness);
        break;
        case '2':
            UpdateDutyCycle(TIMERA3_BASE, TIMER_A, Brightness);
        break;
        default :
         break;
        }
    }
}