STM32单片机学习(9) LCD1602显示屏输出实验

接在了GPIOX口*///接口#define lcd_GPIO GPIOB#define lcd_busyflag GPIO_Pin_15 //DB7对应的口#define lcd_pin_RS GPIO_Pin_1 #define lcd_pin_RW GPIO_Pin_2#define lcd_pin_Enable GPIO_Pin_0//状态#define lcd_DATA 1#define lcd_COMMAND 0#define lcd_READ 1#define lcd_WRITE 0//功能#define lcd_RS(n) n ? GPIO_SetBits(lcd_GPIO,lcd_pin_RS) : GPIO_ResetBits(lcd_GPIO,lcd_pin_RS)#define lcd_RW(n) n ? GPIO_SetBits(lcd_GPIO,lcd_pin_RW) : GPIO_ResetBits(lcd_GPIO,lcd_pin_RW)#define lcd_Enable(n) n ? GPIO_SetBits(lcd_GPIO,lcd_pin_Enable) : GPIO_ResetBits(lcd_GPIO,lcd_pin_Enable)void RCC_Configuration(void);void GPIO_Configuration(void);void Lcd_Write(u8 type,u8 buf); void Lcd_WriteString(u8 *buf);int Lcd_isbusy(void);void Lcd_Init(void);int fputc(int ch, FILE *f);void getSys_ID(void);/*函数: int main(void)功能: main主函数参数: 无返回: 无/int main(void){int i=0;unsigned char* display_1={"chip ID:"};//unsigned char* display_2={"www.llqqww.com"};RCC_Configuration();GPIO_Configuration();delay_init(72);Lcd_Init();//while(1){while(Lcd_isbusy()); //检测忙信号Lcd_Write(lcd_COMMAND,0x80); //第一行第一个字开始for(i=0;display_1[i]!=\0;i++){while(Lcd_isbusy()); //检测忙信号Lcd_Write(lcd_DATA,display_1[i]);//delay_ms(500);}//while(Lcd_isbusy()); //检测忙信号//Lcd_Write(lcd_COMMAND,0xC0); //第二行第一个字开始//Lcd_WriteString("www.llqqww.com");getSys_ID();/*for(i=0;display_2[i]!=\0;i++){Lcd_Write(lcd_DATA,display_2[i]);delay_ms(500);} */// Lcd_Write(lcd_COMMAND,0x01); //清屏// } }/*函数: void RCC_Configuration(void)功能: 复位和时钟控制 配置*/void RCC_Configuration(void){ErrorStatus HSEStartUpStatus; //定义外部高速晶体启动状态枚举变量RCC_DeInit(); //复位RCC外部设备寄存器到默认值RCC_HSEConfig(RCC_HSE_ON); //打开外部高速晶振HSEStartUpStatus = RCC_WaitForHSEStartUp(); //等待外部高速时钟准备好if(SUCCESS == HSEStartUpStatus) //外部高速时钟已经准别好{FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //开启FLASH预读缓冲功能，加速FLASH的读龋所有程序中必须的用法.位置：RCC初始化子函数里面，时钟起振之后FLASH_SetLatency(FLASH_Latency_2); //flash操作的延时RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); //配置PLL时钟 == 外部高速晶体时钟(16MHz) * 9 = 72MHz RCC_PLLCmd(ENABLE); //使能PLL时钟RCC_HCLKConfig(RCC_SYSCLK_Div1); //配置AHB(HCLK)时钟等于==SYSCLK(系统时钟)RCC_PCLK2Config(RCC_HCLK_Div1); //配置APB2(PCLK2)钟==AHB时钟RCC_PCLK1Config(RCC_HCLK_Div2); //配置APB1(PCLK1)钟==AHB1/2时钟while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET){} //等待PLL时钟就绪RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //配置系统时钟 = PLL时钟while(RCC_GetSYSCLKSource() != 0x08){} //检查PLL时钟是否作为系统时钟}RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE); //允许GPIOB、AFIO时钟}/*函数: void GPIO_Configuration(void）功能: GPIO初始化*/void GPIO_Configuration(void){GPIO_InitTypeDef GPIO_InitStructure; //定义GPIO初始化结构体GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All ; //设置初始化引脚GPIO_InitStructure.GPIO_Speed = GPI