84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/**********************************************************************
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*
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* 实验名称：MCU时钟模式切换实验
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* 实验平台：NV32开发板
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* 板载芯片：NV32F100FL64E
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* 实验效果：MCU的时钟模式由当前的FEE模式切换到FEI模式
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*
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************************************************************************/
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#include "common.h"
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#include "ics.h"
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#include "rtc.h"
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#include "uart.h"
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#include "sysinit.h"
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int main (void);
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void RTC_Task(void);
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/********************************************************************/
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int main (void)
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{
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uint8_t u8Ch;
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ICS_ConfigType sICSConfig;
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RTC_ConfigType sRTCConfig;
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RTC_ConfigType *pRTCConfig = &sRTCConfig;
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UART_ConfigType sConfig;
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/*系统初始化*/
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sysinit();
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printf("\nRunning the platinum project.\r\n");
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LED0_Init();
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LED2_Init();
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/*初始化RTC模块，每隔1s产生一次中断*/
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pRTCConfig->u16ModuloValue = 9;
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pRTCConfig->bInterruptEn = RTC_INTERRUPT_ENABLE; /*使能中断 */
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pRTCConfig->bClockSource = RTC_CLKSRC_1KHZ; /*时钟源1KHz*/
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pRTCConfig->bClockPresaler = RTC_CLK_PRESCALER_100; /*时钟分频系数100*/
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RTC_SetCallback(RTC_Task);
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RTC_Init(pRTCConfig);
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printf("\nIt is in FEE mode now.\r\n");
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UART_WaitTxComplete(TERM_PORT);
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/*将时钟模式由FEI模式切换到FEE模式*/
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sICSConfig.oscConfig.bGain = 1; /* 使能高增益 */
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sICSConfig.oscConfig.bRange = 1; /* 使能高范围 */
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sICSConfig.oscConfig.bEnable = 1; /* 使能 OSC */
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sICSConfig.oscConfig.bIsCryst = 1; /* OSC的输出选择选择振动器时钟源 */
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sICSConfig.oscConfig.bWaitInit = 1; /* 等待振荡器初始化化完成 */
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sICSConfig.u32ClkFreq = 10000; /* 板载为10M晶振*/
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ICS_SwitchMode(FEI,FEE, &sICSConfig);
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ICS_SetBusDivider(1); //总线时钟不得高于40M主频，所以10M晶振256分频再1280倍频后为50M，需要经过BDIV二分频为25M
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/* 由于时钟模式转变，总线时钟发生变化从新初始化UART模块*/
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sConfig.u32SysClkHz = 25000000L;
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sConfig.u32Baudrate = UART_PRINT_BITRATE;
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UART_Init (TERM_PORT, &sConfig);
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printf("switch to FEE mode.\r\n");
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while(1);
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}
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/*****************************************************************************//*!
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*
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* @brief RTC模块回调函数
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*
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* @param none
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*
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* @return none
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*
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*****************************************************************************/
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void RTC_Task(void)
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{
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/*切换LED0状态 */
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LED0_Toggle();
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}
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/********************************************************************/
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