/****************************************************/
/* Examples Program For "CP-JR ARM7 USB-LPC2148" */
/* Target MCU : Philips ARM7-LPC2148 */
/* : X-TAL : 12.00 MHz */
/* : Run Speed 60.00 MHz (With PLL) */
/* : PLL Setup = M(5),P(2) */
/* : VPB Clock = CPU Clock = 60.00 MHz */
/* Keil Editor : uVision3 V3.03a */
/* Compiler : Keil CARM V2.50a */
/* Create By : Eakachai Makarn ([url]WWW.ETT.CO.TH[/url]) */
/* Last Update : 17/May/2006 */
/* Function : Example Display ADC8(P0.6)-> UART0 */
/****************************************************/
// Used GPIO0.6 = AIN8 (ADC8) Measure Voltage
// Display Result on UART0(9600,N,8,1)
#include "LPC214x.H" // LPC2148 MPU Register
#include <stdio.h> // For Used Function printf
/* pototype section */
void init_serial0 (void); // Initil UART-0
int putchar (int ch); // Put Char to UART-0
int getchar (void); // Get Char From Uart-0
void delay(unsigned long int); // Delay Time Function
unsigned int val; // ADC Result (HEX)
float volt; // ADC Result Volt
int main(void)
{
PCONP|=1<<20;//set PDA1
init_serial0(); // Initial UART0 = 9600,N,8,1
//Initial ADC8 (GPIO-0.6) By Set PINSEL0[13:12=11]
// xxxx xxxx xxxx xxxx xx11 xxxx xxxx xxxx
PINSEL0 |= 0x00003000; // Select ADC8 Pin Connect P0.6
// Initial ADC8 (ADCR=0x01210601)
AD1CR &= 0x00000000; // Clear All Bit Control
AD1CR |= 0x00000001; // Select ADC = AIN8
AD1CR |= 0x00000600; // ADC Clock = VBP(PCLK) / 7
AD1CR |= 0x00010000; // Busrt = 1 = Conversion Continue
AD1CR &= 0xFFF1FFFF; // CLKS = 000 = 10Bit : 11 Cycle Clock Conversion
AD1CR |= 0x00200000; // PDN = 1 = Active ADC Module
AD1CR &= 0xFF3FFFFF; // TEST[1:0] = 00 = Normal Mode
AD1CR &= 0xF7FFFFFF; // EDGE = 0 = Conversion on Falling Edge
AD1CR |= 0x01000000; // START = 001 = Start Conversion Now
// Start Test Read ADC8 and Display on UART0 //
while(1) // Loop Continue
{
do // Loop Read ADC1.1(ADC8)
{
val = AD1DR0; // Read A/D Data Register
}
while ((val & 0x80000000) == 0); // Wait ADC Conversion Complete .error
//loop forever at this row on simulitor
val = (val >> 6) & 0x03FF; // Shift ADC Result to Integer
volt = val * 3.3 / 1023.0; // Volt = ADC Result x [3.3V / 1024]
printf("\rADC8 Result = %1.1f Volt.",volt); // Display 3-Digit Result(0-3.3V)
delay(10000);
}
}
/******************************/
/* Initial UART0 = 9600,N,8,1 */
/* VPB(pclk) = 60.00 MHz */
/******************************/
void init_serial0 (void)
{
PINSEL0 &= 0xFFFFFFF0; // Reset P0.0,P0.1 Pin Config
PINSEL0 |= 0x00000001; // Select P0.0 = TxD(UART0)
PINSEL0 |= 0x00000004; // Select P0.1 = RxD(UART0)
U0LCR &= 0xFC; // Reset Word Select(1:0)
U0LCR |= 0x03; // Data Bit = 8 Bit
U0LCR &= 0xFB; // Stop Bit = 1 Bit
U0LCR &= 0xF7; // Parity = Disable
U0LCR &= 0xBF; // Disable Break Control
U0LCR |= 0x80; // Enable Programming of Divisor Latches
// U0DLM:U0DLL = 60.00 MHz / [16 x Baud]
// = 60.00 MHz / [16 x 9600]
// = 390.6 = 391 = 0187H
U0DLM = 0x01; // Program Divisor Latch(391) for 9600 Baud
U0DLL = 0x87;
U0LCR &= 0x7F; // Disable Programming of Divisor Latches
U0FCR |= 0x01; // FIF0 Enable
U0FCR |= 0x02; // RX FIFO Reset
U0FCR |= 0x04; // TX FIFO Reset
U0FCR &= 0x3F;
}
/****************************/
/* Write Character To UART0 */
/****************************/
int putchar (int ch)
{
if (ch == '\n')
{
while (!(U0LSR & 0x20)); // Wait TXD Buffer Empty
U0THR = 0x0D; // Write CR
}
while (!(U0LSR & 0x20)); // Wait TXD Buffer Empty
return (U0THR = ch); // Write Character
}
/*****************************/
/* Read Character From UART0 */
/*****************************/
int getchar (void)
{
while (!(U0LSR & 0x01)); // Wait RXD Receive Data Ready
return (U0RBR); // Get Receice Data & Return
}
/***********************/
/* Delay Time Function */
/* 1-4294967296 */
/***********************/
void delay(unsigned long int count1)
{
while(count1 > 0) {count1--;} // Loop Decrease Counter
}