基于单片机智能停车场的设计程序.doc

车位诱导程序：（1）系统初始化：一般情况，直接调用此函数将单片机系统时钟设置在72MHzSystemInit();程序中经常要用到延时函数，在这里为了提高CPU工作效率，不再使用死等待的演示方式，而是采用定时器作延时。void Delay_Configuration(u8 SYSCLK)RCC_APB1PeriphClockCmd(Delay_RCC_APB1Periph_TIMx, ENABLE);TIM_PrescalerConfig(Delay_TIMx, SYSCLK, TIM_PSCReloadMode_Update);（2）超声波检测模块初始化/超声波软件系统初始化void Sonic_Init(void)Sonic_RCC_Configuration(); Sonic_GPIO_Configuration();Sonic_NVIC_Configuration();Sonic_TIM_Configuration(); ：/打开超声波需要使用的系统资源的时钟void Sonic_RCC_Configuration(void)RCC_APB2PeriphClockCmd(SONIC_RCC_APB2Periph_GPIOx_OUT|SONIC_RCC_APB2Periph_GPIOx_IN,ENABLE);/打开时钟RCC_APB1PeriphClockCmd(SONIC_RCC_APB1Periph_TIMx,ENABLE);/这里设置超声波检测所需要的引脚的相应功能void Sonic_GPIO_Configuration(void)GPIO_InitTypeDef GPIO_InitStructure;/*波形输出 驱动超声波*/GPIO_InitStructure.GPIO_Pin=SONIC_GPIO_Pinx_OUT;GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;/!GPIO_Init(SONIC_GPIOx_OUT,&GPIO_InitStructure);GPIO_InitStructure.GPIO_Pin = SONIC_GPIO_Pinx_IN;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(SONIC_GPIOx_IN, &GPIO_InitStructure);/打开中断，设置中断优先级void Sonic_NVIC_Configuration(void)NVIC_InitTypeDef NVIC_InitStructure;NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); /设置优先级NVIC_InitStructure.NVIC_IRQChannel=SONIC_TIMx_IRQn;/使能外部中断线1(IRQ通道)NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0; /先占优先级NVIC_InitStructure.NVIC_IRQChannelSubPriority=0; /从优先级NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;NVIC_Init(&NVIC_InitStructure); /定时器的初始化配置void Sonic_TIM_Configuration(void)TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;TIM_OCInitTypeDef TIM_OCInitStructure;TIM_ICInitTypeDef TIM_ICInitStructure;/*通用定时器配置*/TIM_TimeBaseStructure.TIM_Period =65535;/TIMx-ARR设置自动装载值TIM_TimeBaseStructure.TIM_Prescaler =72;/TIMx-PSC 设置预分频器值TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1;/设置时钟频率TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; /选择计数器模式TIM_TimeBaseInit(SONIC_TIMx, & TIM_TimeBaseStructure);TIM_OCStructInit(&TIM_OCInitStructure); /默认参数 TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;/模式1设置输出比较3模式 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; /设置为输出TIM_OCInitStructure.TIM_Pulse =21; /设置捕获比较寄存器4值即占空长度 TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;/设置输出极性-高电平 TIM_OC4Init(SONIC_TIMx, &TIM_OCInitStructure); /初始化TIMx通道4. TIM_OC4PreloadConfig(SONIC_TIMx, TIM_OCPreload_Enable); /TIMx-CCMR2 OC4PE 输出比较4的预加载使能位TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;TIM_ICInitStructure.TIM_ICFilter = 0x0;TIM_PWMIConfig(SONIC_TIMx, &TIM_ICInitStructure);/* Select the TIM3 Input Trigger: TI2FP2 */TIM_SelectInputTrigger(SONIC_TIMx, TIM_TS_TI2FP2);/* Select the slave Mode: Reset Mode */TIM_SelectSlaveMode(SONIC_TIMx, TIM_SlaveMode_Reset);/* Enable the Master/Slave Mode */TIM_SelectMasterSlaveMode(SONIC_TIMx, TIM_MasterSlaveMode_Enable);/* TIM enable counter */TIM_Cmd(SONIC_TIMx, ENABLE);/* Enable the CC2 Interrupt Request */TIM_ITConfig(SONIC_TIMx, TIM_IT_CC2, ENABLE);/定时器中断里边的内容void TIMx_IRQHandler(void)if(TIM_GetITStatus(SONIC_TIMx,TIM_IT_CC2)!=RESET) TIM_ClearITPendingBit(SONIC_TIMx,TIM_IT_CC2); value1=TIM_GetCapture2(SONIC_TIMx); if(value1!=0) value2=TIM_GetCapture1(SONIC_TIMx); else value1=0;value2=0; time=value2; /12864液晶显示模块初始化/初始化液晶，引脚初始化，发送初始化命令void initlcd12864()GPIO_Config();write_com(0x30);delayms(1);write_com(0x0c);/整体显示开 游标关 游标位置关delayms(1);write_com(0x01);delayms(5);/液晶引脚资源初始化void GPIO_Config(void)GPIO_InitTypeDef GPIO_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOx|RCC_APB2Periph_GPIOy,ENABLE);GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_Init(GPIOx, &GPIO_InitStructure);GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_Init(GPIOy, &GPIO_InitStructure);/打印显示汉字程序，包括设定显示坐标，显示内容void hanzi(unsigned char x,unsigned char y,unsigned char *z) /显示汉字 字符unsigned char pos;if(x=0)x=0x80;if(x=1)x=0x90;if(x=2)x=0x88;if(x=3)x=0x98;pos=x+y;write_com(pos);while(*z!=0)write_date(*z);z+; /主函数内容int main(void)u8 a,b,c,d;SystemInit();GPIO_Configuration();/串口引脚初始化USART_Configuration(9600);/串口初始化，方便系统调试Delay_Configuration(72);/系统延时函数初始化Sonic_Init();/超声波初始化initlcd12864();/液晶显示模块初始化printf(n OK n);/初始化结束 串口打印OK信息while(1)a=Sonic1();b=Sonic2();c=Sonic3();d=