Content originally posted in LPCWare by salamlora1 on Sun Aug 25 00:21:00 MST 2013
Hi all
i right a program for UART0 whit DMA it’s not work correctly any one can fine my mistake ???
#include <nxp/iolpc1768.h>
#include <stdio.h>
#include "gpio1768.h"
unsigned char h[]="1";
char a[2]="11";
void uart_init(unsigned short baud)
{
unsigned short div; //PCONP |= 0x20210048 ;
CLKOUTCFG = 0;
div = (unsigned short)(10000000/(baud*16L));
U0LCR = 0x83;
U0DLL = (div);
U0DLM = (div>>8);
U0LCR &= ~(1<<7);
PINSEL0 |= (1<<4);
//U0FCR = 0x87;/* Enable and reset TX and RX FIFO. */
U0FCR |= 0x87;
}
void dmacon(void)
{
U0FCR = 0x87;
PCONP = 0xffffffff;
CCLKCFG = 0;
PCONP |=(1<<29);
DMACCONFIGURATION = 0x00000001;
DMACC0CONFIGURATION = 0x00000001;
DMACINTTCCLEAR = 0xff ; //clear all interrupts
DMACINTERRCLR = 0xff; //eclear interrupt errors
DMACC0SRCADDR = ( int ) &a;
DMACC0DESTADDR = ( int ) &U0THR;
DMACC0LLI =0;//(unsigned int ) &a[1];
DMACC0CONTROL = sizeof(a);
DMACC0CONTROL |= (1<<12);
DMACC0CONFIGURATION |= (1<<0);
DMACC0CONFIGURATION |= (1000<<6);
DMACC0CONFIGURATION |= (1<<11);
DMACC0CONFIGURATION |= 0x00000001;
//delay(50000);
}
// PLL INIT
void pllinit (void)
{
//((FCCO = (2 × M × FIN) / N))
//"M" is bit of 14:0 PLL0CFG and "N" is bit of 23:16
SCS = (0x00000001 << 5); //Enable Main Oscillator
SCS |= 0x00000020; //Select the main Oscillator range
PLL0CON &= ~0x01; //Disconnect the PLL
PLL0FEED = 0xAA;
PLL0FEED = 0x55;
PLL0CON &= ~0x01; //Disconnect the PLL
PLL0FEED = 0xAA;
PLL0FEED = 0x55; //Write feed sequence
while(!(SCS & 0x00000040)); //Wait untill Main Oscillator is stable
CLKSRCSEL = 0x00000001; //Select Main Oscillator as PLL Imput
PLL0CFG = (0x000000A|0x00020000); //Write PLL Multipiler and Divider values
PLL0FEED = 0xAA;
PLL0FEED = 0x55; //Write Feed Sequence
PLL0CON = 0x01; //Enable PLL
PLL0FEED = 0xAA;
PLL0FEED = 0x55; //Wriete Feed Sequence
USBCLKCFG = 0x00000009; //Write USBSEL Divider value
CCLKCFG = 0x00000008; //Write CPU Divider Value
while(PLL0STAT & 0x000); //Wait PLL for Lock
PLL0CON |= 0x02; //Connect the PLL
PLL0FEED = 0xAA;
PLL0FEED = 0x55;
}
void main()
{ dmacon();
U0TER = 0x80;
U0FCR = 0x1;
U0FCR = 0x87;
pllinit();
//dir0(24);
//set0(24) ;
// PCLKSEL0 |=(1<<6); //pish taghsim konanad e PCLK
uart_init(9600);
//delay(500);
//delay(500);
//U0THR = '0';
//U0THR = '1';
//U0THR = '2';
//U0THR = '3';
//U0THR = '4';
//U0FCR |=(1<<0);
//U0FCR |=(1<<1);
U0TER |= 0x80;
while (1)
{
delay(2);
while( (U1LSR & (1<<5))== 0);
uart_init(9600);
U0TER = 0x80;
dmacon();
delay(10000) ;
}
}
