Keil uVision3代码ADC接口LPC2148使用维克.zip

/* According to Oasis Titan Kit Connections from LPC2148 to LCD and ADC and Push-To-On Switch: Program Developed By Prof. Arvind Hatkar Port P1.16 to P1.23 used for LCD Data bits. Port P0.28 used for LCD RS - Command / Data (Pin No.13) Port P0.29 used for LCD EN - Enable (Pin No.14) RW of LCD is connected to ground AD0.4 (Analog Input), (Pin No.9) Pin 25 from Connector P1, is connected to Pin 1 of Jumper 5 by flexible Wire, after removing jumper from 1-2 and 2-3. EINT3 (External Interrupt 3 Input), (Pin No.15) is connected through Push to On Switch S3 S3 can be pressed momentary to issue Start Of Conversion for ADC manually, On End Of Conversion ADC generates interrupt which is handelled by VIC. */ #include <LPC21xx.h> #define ADC_START 0X01000000 #define ADC_DONE 0X80000000 #define RS 0x10000000; #define EN 0x20000000; static unsigned int adcdata, Temp; void delay(void); void enable(void); void initLCD(void); void LCD_Cmd(unsigned int cmd); void LCD_WriteString(char * string); void LCD_WriteData(unsigned int value); void ADC_Isr(void) __irq { adcdata = ADDR; //Latch/Read Converted Data adcdata = adcdata>>6; //Shift ADC Data to LSB by 6 Bits adcdata = adcdata & 0x3FF; //Clearing all other Bits Temp = adcdata; //Make a copy of adcdata VICVectAddr = 0; // reset VIC } int main(void) { unsigned char ones,tens,hundreds,thousands; PINSEL1 = PINSEL1 & 0xFFF3FFFF; //1111 1111 1111 0011 1111 1111 1111 1111, Clear PINSEL1 19:18 Bits, P0.25 used as AD0.4 PINSEL1 = PINSEL1 | 0x00040000; //0000 0000 0000 0100 0000 0000 0000 0000, Set PINSEL1 19:18 Bits to AD0.4 ADCR = 0x00200310; //Code for ADCR is as follows //XXXX 0 000 XX 1 X 000 0 00000011 00010000 //Reserved EDGE START Reserved PDN Reserved CLKS BURST CLKDIV SEL //Reserved Falling_Edge No_Start Reserved Operational Reserved 11_clocks/10 bit Software_Controlled Clock_4Mhz AD0.4 // PINSEL1 = PINSEL1 | 0x20000000; //Pin Configured as EXT INT P0.30 PINSEL1 = PINSEL1 & 0xCFFFFFFF; //Pin Configured as GPIO P0.30 IODIR0 = IODIR0 | 0xBFFFFFFF; //Makes P0.30 as Iutput. VICIntEnable |= (1<<18) ; //Enable 18th Bit, ADC0 IRQ VICVectCntl0 = (1<<5) | 18 ; //Slot �0� for ADC0 i.e. 5th bit must 1 to enable the slot VICVectAddr0 = (unsigned int) &ADC_Isr; //Vectored-IRQ for ADC0 has been configured ADINTEN |= (1<<5); //Enable Completion of a Conversion on ADC channel 1 will to generate interrupt initLCD(); //Ininialize LCD LCD_WriteString("ADC By VIC"); //Displat Message on first line of LCD ADCR |= ADC_START; //Start ADC Conversion while(1) { adcdata = Temp; //Restore copy of adcdata ones = adcdata % 10; adcdata = adcdata / 10; tens = adcdata % 10; adcdata = adcdata / 10; hundreds = adcdata % 10; adcdata = adcdata / 10; thousands = adcdata % 10; LCD_Cmd(0xC0 << 16); //Second Line to Display ADC Output LCD_WriteData(thousands | 0x30); LCD_WriteData(hundreds | 0x30); LCD_WriteData(tens | 0x30); LCD_WriteData(ones | 0x30); if( !(IOPIN0 & (1<<30)) ) // Evaluates to True for a 'LOW' on P0.30 (1<<30) { ADCR |= ADC_START; //Restart ADC Conversion LCD_Cmd(0x80 << 16); LCD_WriteString("ADC Restarted"); //Displat Message on first line of LCD } } return 0; } void initLCD(void) { IODIR1 = 0x00FF0000; //P1.16 to P1.23 (DATA) configured as Output - Using 8 Bit mode IODIR0 = 0x30000000; //Makes RS and EN Output. IOPIN0 = 0x0; //Respective Outpot Port0 Pin (Set by IODIR0) will Become LOW IOPIN1 = 0x0; //Respective Outpot Port1 Pin (Set by IODIR0) will Become LOW //LCD Initialization Sequence Now starts (<< 16 Shift 16 Bits left) LCD_Cmd(0x38 << 16); //Function Set Command : 8 Bit Mode , 2 Rows , 5x10 Font Style LCD_Cmd(0x0E << 16); //Display On/Off Command : Display on , Cursor on , Blink off LCD_Cmd(0x06 << 16); //Input Set : Increment Mode LCD_Cmd(0x01 << 16); //Clear Display Command , Cursor at Home LCD_Cmd(0x80 << 16); //Not required the 1st time but needed to reposition the cursor at home after Clearing Screen } void LCD_Cmd(unsigned int cmd) { IOCLR0 |= RS; //Enter Instruction Mode RS LOW IOPIN1 = cmd; //Supply Instruction/Command Code enable(); //Pulse Enable to process it } void enable(void) { delay(); IOSET0 |= EN; //Enable=High delay(); IOCLR0 |= EN; //Enable=Low delay(); } void delay(void) { int i=0,x=0; for(i=0; i<19999; i++) { x++; } } void LCD_WriteString(char * string) { int c=0; while (string[c]!='\0') { LCD_WriteData(string[c]); c++; } } void LCD_WriteData(unsigned int value) { IOSET0 |= RS; //Switch to Data Mode RS HIGH IOPIN1 = (int) value << 16; //Supply Character Code enable(); //Pulse Enable to process it }