C8051F350单片机1602液晶显示程序

1、#include #include #include /-/ 16-bit SFR Definitions for F35x/-sfr16 TMR2RL = 0xCA; / Timer2 reload valuesfr16 TMR2 = 0xCC; / Timer2 countersfr16 ADC0DEC = 0x9A; / ADC0 Decimation Ratio Register/sfr16 ADC0 = 0xbd;/-/ Global CONSTANTS/-#define SYSCLK / SYSCLK frequency in Hz#define MDCLK / Modulator

2、 clock in Hz (ideal is / (2.4576 MHz)#define OWR 960 / Desired Output Word Rate in Hz ADC0输出字速率,最大960#define BAUDRATE / Baud rate of UART in bps #define uchar unsigned char#define uint unsigned int#define DataPort P0sbit LCM_EN=P10;sbit LCM_RS=P11; unsigned char D1,D2,D3,D4,D5,D6,D7,D8;/sbit LED = P

3、07; unsigned int k;/-/ Function PROTOTYPES/-void Oscillator_Init (void);void Port_Init (void);void UART0_Init (void);void ADC0_Init(void);void delay(int i);void WriteCommandLCM(uchar CMD);void WriteDataLCM(uchar dataW);void InitLcd();void lcd_write_char(uchar x,uchar y,uchar dataW) ;/-/ MAIN Routine

4、/-void main (void) PCA0MD &= 0x40; / WDTE = 0 (clear watchdog timer / enable) Oscillator_Init(); / Initialize system clock Port_Init(); / Initialize Crossbar and GPIO / UART0_Init(); / Initialize UART0 for printfs InitLcd(); ADC0_Init(); / Initialize ADC0 AD0INT = 0; ADC0MD = 0x83; / Start continuou

5、s conversions EA = 1; / Enable global interrupts while (1) / Spin forever /-/ Initialization Subroutines/-void delay(int i) /大概0.43ms int j,k; for(j=0;ji;j+) for(k=0;k4; delay(5); LCM_EN=1; delay(10); LCM_EN=0; delay(10); /CMD=CMD4; DataPort&=0xf0; / delay(2); DataPort|=(CMD&0x0f); delay(10); LCM_EN

6、=1; delay(10); LCM_EN=0; void WriteDataLCM(uchar dataW) / delay(2); LCM_EN=0; LCM_RS=1;/ delay(2); DataPort&=0xf0;/ delay(2); DataPort|=(dataW&0xf0)4; delay(2); LCM_EN=1; delay(5); LCM_EN=0; delay(5); / dataW=dataW4; DataPort&=0xf0;/ delay(2); DataPort|=(dataW&0x0f); delay(2); LCM_EN=1; delay(5); LC

7、M_EN=0; void InitLcd() delay(2000); WriteCommandLCM(0x28); /4位数据总线 /delay(5); WriteCommandLCM(0x01); /清屏 WriteCommandLCM(0x0C); /显示开及光标设置 / WriteCommandLCM(0x0f); / delay(200); /-/ Oscillator_Init/-/ Return Value : None/ Parameters : None/ This routine initializes the system clock to use the interna

8、l 24.5MHz/ oscillator as its clock source. Also enables missing clock detector reset./-void Oscillator_Init (void) OSCICN = 0x83; / Configure internal oscillator for 配置内部振荡器 / its lowest frequency RSTSRC = 0x04; / Enable missing clock detector/-/ Port_Init/-/ Return Value : None/ Parameters : None/T

9、hisfunctioninitializestheGPIO and the Crossbar 初始化GPI0和交叉开关/ Pinout:/ P0.4 - UART TX (digital, push-pull) / P0.5 - UART RX (digital, open-drain)/ AIN0.2 - ADC0 input/-void Port_Init (void) / XBR0 = 0x01; / UART0 Selected XBR1 = 0x40; / Enable crossbar and weak pull-ups P0MDOUT |= 0xDf; / TX, LEDs =

10、Push-pull P1MDOUT |=0x03;/-/ UART0_Init/-/ Return Value : None/ Parameters : None/ Configure the UART0 using Timer1, for and 8-N-1./-/*void delay(unsigned int time) unsigned int i; while(-time) for(i=0;i125;i+); */*void UART0_Init (void) SCON0 = 0x10; / SCON0: 8-bit variable bit rate 串口控制寄存器 / level

11、 of STOP bit is ignored / RX enabled / ninth bits are zeros / clear RI0 and TI0 bits if (SYSCLK/BAUDRATE/2/256 1) TH1 = -(SYSCLK/BAUDRATE/2); CKCON |= 0x08; / T1M = 1; SCA1:0 = xx else if (SYSCLK/BAUDRATE/2/256 4) TH1 = -(SYSCLK/BAUDRATE/2/4); CKCON &= 0x0B; / T1M = 0; SCA1:0 = 01 CKCON |= 0x01; els

12、e if (SYSCLK/BAUDRATE/2/256 12) TH1 = -(SYSCLK/BAUDRATE/2/12); CKCON &= 0x0B; / T1M = 0; SCA1:0 = 00 else if (SYSCLK/BAUDRATE/2/256 48) TH1 = -(SYSCLK/BAUDRATE/2/48); CKCON &= 0x0B; / T1M = 0; SCA1:0 = 10 CKCON |= 0x02; else while (1); / Error. Unsupported baud rate TL1 = TH1; / Init Timer1 定时器1是用来确

13、定有相同的波特率 TMOD &= 0xf0; / TMOD: timer 1 in 8-bit autoreload TMOD |= 0x20; TR1 = 1; / START Timer1 TI0 = 1; / Indicate TX0 ready*/-/ ADC0_Init/-/ Return Value : None/ Parameters : None/ Initialize the ADC to use the temperature sensor. (non-differential)/-void ADC0_Init (void) REF0CN |= 0x03; / Enable

14、 internal Vref ADC0CN = 0x00; / Gain = 1, Unipolar mode 最后三位 PGA增益=1，ADC控制寄存器 ADC0CF = 0x00; / Interrupts upon SINC3 filter output ADC0配置寄存器，位4选择哪一个滤波器转换结束后使AD0INT中断标志置1， / and uses internal VREF 位2是VREF源选择位 ADC0CLK = (SYSCLK/MDCLK)-1; / Generate MDCLK for modulator. 调制器时钟分频系数，由最佳调制器时钟频率反求系数 / Ideal

15、ly MDCLK = 2.4576MHz / Program decimation rate for desired OWR ADC0DEC = (unsigned long) MDCLK / (unsigned long) OWR / / ADC0抽取比寄存器，确定ADC输出字速率，由输出字速率反求抽取比 (unsigned long) 128) - 1; ADC0BUF = 0x00; / Turn off Input Buffers ADC0MUX = 0x08; / Select AIN0.2 模拟多路选择控制寄存器 ADC0MD = 0x81; / Start internal ca

16、libration ADC0控制寄存器，校准和转换选择 while(AD0CALC != 1); / Wait until calibration is complete EIE1 |= 0x08; / Enable ADC0 Interrupts 转换结束中断允许 ADC0MD = 0x80; / Enable the ADC0 (IDLE Mode)/-/ Interrupt Service Routines/-/-/ ADC0_ISR/-/ This ISR prints the result to the UART. The ISR is called after each ADC/

17、conversion./-void ADC0_ISR (void) interrupt 10 unsigned long ADC_OutputVal; static double accumulator = 0; / unsigned long int i; static unsigned int measurements = 0; static unsigned int number=0; / static unsigned long average; static unsigned int flag = 1; unsigned int result=0; while(!AD0INT); AD0INT = 0; / InitLcd(); ADC_OutputVal=0x; ADC_OutputVal = ADC0H; ADC_OutputVal =