[MSP432] 电源类竞赛专用MSP432代码.c

shannon2014 2015-8-2 18:33 楼主

楼主准备参见今年的电赛，选题方向呢是有关电源类的，往年一直用5529,今年入手了MSP432，就准备选这款做主控了，经过几天努力，准备好了代码，现在来和大家分享下

回复评论（24）

沙发 shannon2014

楼主一向习惯用库函数，这次当然也不例外啦，首先打开CCS的MSPWARE，新建一个工程

点赞 2015-8-2 18:36

板凳 shannon2014

在此基础上我们可以一步步移植库函数的例子，首先呢就从时钟系统开始吧，感兴趣的同志们去研读下芯片手册，432的时钟系统叫CS，

吓了一跳当时也是，首先看这两个例子，clock_Init和HFxt_start

点赞 2015-8-2 18:41

我们可以看到这两段代码：
int main(void)
{
/* Halting the Watchdog */
MAP_WDT_A_holdTimer();

/* Configuring pins for peripheral/crystal usage and LED for output */
MAP_GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_PJ,
         GPIO_PIN3 | GPIO_PIN4, GPIO_PRIMARY_MODULE_FUNCTION);
MAP_GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN0);

/* Setting the external clock frequency. This API is optional, but will
   * come in handy if the user ever wants to use the getMCLK/getACLK/etc
   * functions
   */
CS_setExternalClockSourceFrequency(32000,48000000);

/* 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, 2);
MAP_FlashCtl_setWaitState(FLASH_BANK1, 2);
CS_startHFXT(false);

/* Initializing MCLK to HFXT (effectively 48MHz) */
MAP_CS_initClockSignal(CS_MCLK, CS_HFXTCLK_SELECT, CS_CLOCK_DIVIDER_1);

/* Configuring SysTick to trigger at 24000000 (MCLK is 48MHz so this will
   * make it toggle every 0.5s) */
MAP_SysTick_enableModule();
MAP_SysTick_setPeriod(24000000);
MAP_Interrupt_enableSleepOnIsrExit();
MAP_SysTick_enableInterrupt();

   /* Enabling MASTER interrupts */
MAP_Interrupt_enableMaster();

while (1)
{
      MAP_PCM_gotoLPM0();
}
}

void systick_isr(void)
{
MAP_GPIO_toggleOutputOnPin(GPIO_PORT_P1, GPIO_PIN0);
}
和

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

/* Initializing the clock source as follows:
   *    MCLK = MODOSC/4 = 6MHz
   *    ACLK = REFO/2 = 16kHz
   *    HSMCLK = DCO/2 = 1.5Mhz
   *    SMCLK = DCO/4 = 750kHz
   *    BCLK  = REFO = 32kHz
   */
MAP_CS_initClockSignal(CS_MCLK, CS_MODOSC_SELECT, CS_CLOCK_DIVIDER_4);
MAP_CS_initClockSignal(CS_ACLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_2);
MAP_CS_initClockSignal(CS_HSMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_2);
MAP_CS_initClockSignal(CS_SMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_4);
MAP_CS_initClockSignal(CS_BCLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_1);

/*
   *  Getting all of the frequency values of the CLK sources using the
   * convenience functions */
aclk = CS_getACLK();
mclk = CS_getMCLK();
smclk = CS_getSMCLK();
hsmclk = CS_getHSMCLK();
bclk = CS_getBCLK();

/*
   * Staying in active mode so that the user can see the values that are put
   * in the above registers through the debugger
   */
while (1)
{

}
}

点赞 2015-8-2 18:44