temp.rar_c8051f120_c8051f120 温度_c8051f120温度_大彩_大彩串口屏

#include <C8051F120.h> // SFR declarations #include "hmi_user_uart.h" sfr16 TMR3 = 0xcc; // Timer3 #define TC_20MS 36864 // 定时器在 11.0592MHz/12时对应于 // 20ms的嘀答数 #define BAUDRATE 115200 // Baud rate of UART in bps // SYSTEMCLOCK = System clock frequency in Hz #define SYSTEMCLOCK 22118400L sfr16 RCAP4 = 0xca; // Timer4 capture/reload sfr16 TMR4 = 0xcc; // Timer4 /************************************************************************ 函数定义 ************************************************************************/ void OSCILLATOR_Init (void); void PORT_Init (void); void UART0_Init (void); void ADC_init (void); void Timer3_init (void); /************************************************************************ 全局变量 ************************************************************************/ int i,j; long temp_temp; // 临时温度值 long temperature; // 以百分之一度表示的温度值 //unsigned idata temp[16]; // 温度采样值的循环缓冲区 //int temp_ptr; // 指向 temp[]的指针 int temp_int; // 温度值的整数部分 int temp_frac; // 温度值的小数部分（以百分之一度为单位） unsigned char number[7]; int main() { WDTCN = 0XDE; WDTCN = 0XAD; //关开门狗必须注意 OSCILLATOR_Init (); //初始化晶振 PORT_Init (); //初始化I/O口 UART0_Init(); //初始化串口 Timer3_init (); //初始化定时器3 ADC_init (); //初始化AD number[5]='d'; number[6]='u'; number[2]='.'; EA=1; //开总中断 while (1) { for (i=0; i < 256; i++); EA=0; //在进行数据转换时并不进行中断响应 temp_int = temperature / 100; temp_frac = temperature - (temp_int * 100); number[0] = (temp_int-temp_int%10)/10+48; //十位 number[1] = temp_int%10+48; //个位 number[3] = (temp_frac-temp_frac%10)/10+48; //小数点后第一位 number[4] = temp_frac%10+48; //小数点后第二位 DisText(80,50,1,2,number); //向屏幕发送温度数据 EA=1; } } /***************************************************************** 振荡器初始化 *****************************************************************/ void OSCILLATOR_Init (void) { int i; // Software timer char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = CONFIG_PAGE; // Set SFR page OSCICN = 0x80; // Set internal oscillator to run // at its slowest frequency CLKSEL = 0x00; // Select the internal osc. as // the SYSTEMCLOCK source // Initialize external crystal oscillator to use 22.1184 MHz crystal,初始化外部晶体振荡器，使用22.1184 MHz晶体 OSCXCN = 0x67; // Enable external crystal osc. CLKSEL = 0x01; //输出为SYSCLK时不分频，SYSCLK来自外部晶体振荡器 for (i=0; i < 256; i++); // Wait at least 1ms //OSCXCN = OSCXCN|0x80 ; while (!(OSCXCN & 0x80)); // Wait for crystal osc to settle SFRPAGE = LEGACY_PAGE; FLSCL |= 0x30; // Initially set FLASH read timing for // 100MHz SYSTEMCLOCK (most conservative // setting) if (SYSTEMCLOCK <= 25000000) { // Set FLASH read timing for <=25MHz FLSCL &= ~0x30; } else if (SYSTEMCLOCK <= 50000000) { // Set FLASH read timing for <=50MHz FLSCL &= ~0x20; } else if (SYSTEMCLOCK <= 75000000) { // Set FLASH read timing for <=75MHz FLSCL &= ~0x10; } else { // set FLASH read timing for <=100MHz FLSCL &= ~0x00; } // Start PLL for 50MHz operation /* SFRPAGE = PLL0_PAGE; PLL0CN = 0x04; // Select EXTOSC as clk source PLL0CN |= 0x01; // Enable PLL power PLL0DIV = 0x01; // Divide by 4 PLL0FLT &= ~0x0f; PLL0FLT |= 0x01; // Set Loop Filt for (22/4)MHz input clock PLL0FLT &= ~0x30; // Set ICO for 30-60MHz PLL0FLT |= 0x00; PLL0MUL = 0x04; // Multiply by 9 // wait at least 5us for (i = 0; i < 256; i++) ; PLL0CN |= 0x02; // Enable PLL while (PLL0CN & 0x10 == 0x00); // Wait for PLL to lock */ SFRPAGE = CONFIG_PAGE; CLKSEL = 0x01; // Select PLL as SYSTEMCLOCK source SFRPAGE = SFRPAGE_SAVE; // Restore SFRPAGE } /***************************************************************** I/O口交叉开关设置（即I/O口复用设置） *****************************************************************/ void PORT_Init (void) { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = CONFIG_PAGE; // Set SFR page XBR0 = 0x04; XBR1 = 0x04; XBR2 = 0x40; P0MDOUT = 0xf3; // Set TX pin to push-pull P0=0xff; P1MDIN= P1MDOUT |= 0x40; // Set P1.6(LED) to push-pull P2MDOUT |= 0x00; // Set P2 to output P2=0xff; P3MDOUT |= 0xff; P4MDOUT |= 0xff; //sram P5MDOUT |= 0xff; P6MDOUT |= 0x00; P6=0xff; // P6MDOUT |= 0xff; P7MDOUT |= 0xff; SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } /***************************************************************** 串口初始化设置 *****************************************************************/ void UART0_Init (void) { char SFRPAGE_SAVE; SFRPAGE_SAVE = SFRPAGE; // Preserve SFRPAGE SFRPAGE = TMR4_PAGE; TMR4CN = 0x00; // Timer in 16-bit auto-reload up timer // mode TMR4CF = 0x08; // SYSCLK is time base; no output; // up count only RCAP4 = - ((long) SYSTEMCLOCK/BAUDRATE/16); TMR4 = RCAP4; TR4= 1; // Start Timer2 SFRPAGE = UART0_PAGE; SCON0 = 0x50; // 8-bit variable baud rate; MODE 1 // 9th bit ignored; RX enabled // clear all flags SSTA0 = 0x1f; // Clear all flags; enable baud rate // doubler (not relevant for these // timers); // Use Timer2 as RX and TX baud rate // source; ES0 = 0; // enable uart0 interrupt //IP |= 0x10; // set uart0 as high priority SFRPAGE = SFRPAGE_SAVE; // Restore SFRPAGE } /***************************************************************** 允许 ADC；定时器3溢出启动转换；允许ADC中断 *****************************************************************/ void ADC_init (void) { char SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = ADC0_PAGE; // Set SFR page AD0EN = 0; // 禁止 ADC REF0CN = 0x07; // 允许温度传感器，片内偏置发生器 // 和偏置输出缓冲器 AMX0SL = 0x0f; // 选择温度传感器为ADC多路开�