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Horace 1:
Thanks a lot ..!
I'm done with UART, n now
In this same project i need to configure "I2C"...
Can u help me by getting me a program..!???
this works on an explorer 16 with a PIC24FJ128GA010
Code:// UART2.c - for PIC24. #include "uart2.h" #ifdef _RP0R #include "pps.h" #endif #include <stdlib.h> #include <stdio.h> #define BRG_DIV2 16 #define BRGH2 0 // initialize UART // Input: baud rate // Output: 1 for OK, -1 if baud rate error > 2% int UART2Init(const unsigned long int BAUDRATE) { unsigned long int BAUDRATEREG = (((SYSCLK/2)+(8ul*BAUDRATE))/BRG_DIV2/BAUDRATE-1); unsigned long int BAUD_ACTUAL = ((SYSCLK/2)/BRG_DIV2/(BAUDRATEREG+1)); unsigned long int BAUD_ERROR = ((BAUD_ACTUAL > BAUDRATE) ? BAUD_ACTUAL-BAUDRATE : BAUDRATE-BAUD_ACTUAL); unsigned long int BAUD_ERROR_PRECENT = ((BAUD_ERROR*100+BAUDRATE/2)/BAUDRATE); __C30_UART=2; // if UART2 set for printf output to this UART // reconfigure the I/O pins if required #ifdef _RP0R iPPSOutput(OUT_PIN_PPS_RP10, OUT_FN_PPS_U2TX); // TXD iPPSInput (IN_FN_PPS_U2RX,IN_PIN_PPS_RP17); // RXD #endif U2BRG = BAUDRATEREG; // set up baudrate U2MODE = 0; // clear mode register U2MODEbits.BRGH = BRGH2; //divider is 16 U2STA = 0; // clear status U2MODEbits.UARTEN = 1; // enable UART U2STAbits.UTXEN = 1; // enable reansmit _U2RXIF = 0; // clear interrupt flag if (BAUD_ERROR_PRECENT > 2) { printf("UART2 baud rate %lu error %lu%%\n", BAUDRATE, BAUD_ERROR_PRECENT); return -1; } printf("UART2 baud rate %lu set up\n", BAUDRATE); return 1; } //Function:UART CharReady - return true if there is a new byte in UART reception buffer. char UART2CharReady() { return _U2RXIF; // none zero if UART has received data } //Function:UART GetChar : waits for a byte to be received. It then returns that byte. char UART2GetChar() { while(! _U2RXIF); // wait for data _U2RXIF = 0; // clear interrupt flag return U2RXREG; } // Function:UART GetString - read a string until \n received or length reached void UART2GetString(char *str , int length) { char ch=0; while(ch != '\n') if(UART2CharReady()) { ch=*str=UART2GetChar(); str++; *str=0; if(--length<1) return; } } // Function:UART PutChar - This routine writes a character to the transmit FIFO void UART2PutChar(const char ch ) { while(U2STAbits.TRMT == 0); // wait for transmit ready U2TXREG = ch; // transmit character } //Function:UART PrintString - prints a string of characters to the UART. void UART2PrintString(const char *str ) { char c; while( (c = *str++) ) UART2PutChar(c); }
main would look like
Code:// Setup configuration bits _CONFIG1( JTAGEN_OFF & GCP_OFF & GWRP_OFF & COE_OFF & FWDTEN_OFF & ICS_PGx2) _CONFIG2( FCKSM_CSDCMD & OSCIOFNC_ON & POSCMOD_HS & FNOSC_PRIPLL ) // main program code int main(void) { UART2Init(57600ul); // Setup the UART UART2PrintString("\n\nPIC24 TEST1, check timer\n\r"); }