i have written a simple UART code, my project is entirely depends upon the serial comunnication.
i have to control 4 to 5 stepper motor and sensor, for which lot of subroutines r to be written, i wanted to make small library which are classified into motor,uart,sensor codes .
now i have written a simple test code for my project, it is working fine when i write all the code in one C file.
when i am tring to modularized the code compiler shows 0 errors but 10 warnings.
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL SYMBOL: SYSTEM_INIT MODULE: D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K >> EIL2\TEST1.OBJ (TEST1) *** WARNING L1: UNRESOLVED EXTERNAL SYMBOL SYMBOL: PORT_IO_INIT MODULE: D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K >> EIL2\TEST1.OBJ (TEST1) *** WARNING L1: UNRESOLVED EXTERNAL SYMBOL SYMBOL: _UART1_TX MODULE: D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K >> EIL2\TEST1.OBJ (TEST1) *** WARNING L1: UNRESOLVED EXTERNAL SYMBOL SYMBOL: UART1_INIT MODULE: D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K >> EIL2\TEST1.OBJ (TEST1) *** WARNING L1: UNRESOLVED EXTERNAL SYMBOL SYMBOL: _DELAY MODULE: D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K >> EIL2\TEST1.OBJ (TEST1) *** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL SYMBOL: SYSTEM_INIT MODULE: D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K >> EIL2\TEST1.OBJ (TEST1) ADDRESS: 0090H *** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL SYMBOL: UART1_INIT MODULE: D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K >> EIL2\TEST1.OBJ (TEST1) ADDRESS: 0093H *** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL SYMBOL: PORT_IO_INIT MODULE: D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K >> EIL2\TEST1.OBJ (TEST1) ADDRESS: 0096H BL51 BANKED LINKER/LOCATER V6.11 11/15/2010 17:19:25 PAGE 3 *** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL SYMBOL: _DELAY MODULE: D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K >> EIL2\TEST1.OBJ (TEST1) ADDRESS: 00A0H *** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL SYMBOL: _UART1_TX MODULE: D:\SWAPNIL_PROJECT\S.O.A.M_30112010\CODE\VERSION2\SOAM_12112010\K >> EIL2\TEST1.OBJ (TEST1) ADDRESS: 00ADH Program Size: data=17.0 xdata=0 code=198 LINK/LOCATE RUN COMPLETE. 10 WARNING(S), 0 ERROR(S)
please help me understand where i am going wrong
this is the code for the above error
TEST1.C
#include <c8051f340.h> #include <Uart1.h> #include "Deviceinit.h" ///////////////////////////////////////////////////////////////////// unsigned char title[] = {'W','e','l','c','o','m','e'}; char j; void main() { System_Init(); UART1_Init (); Port_IO_Init(); EA=1; EIE2 =0x02; //Allow interrupt Delay(250); while(1) { for(j=0;j<7;j++) { Uart1_TX(title[j]); //display array } } } /* void CommValidation() { if (SBUF1 == '#') { Uart1_TX('#'); Delay(50); Uart1_TX('#'); Delay(50); } } */
Deviceinit.c
#include <c8051f340.h> void UART1_Init (void); void System_Init(void); void Port_IO_Init(void); unsigned char temp1; /**************************************************************** * *UART1 Beginning of the first *****************************************************************/ void UART1_Init (void) { SBRLL1 =0x8F; SBRLH1 =0xFD; //12M internal wave oscillating crystal 9600 special rate SCON1 =0x30; //Allowed to receive, ready to receive SMOD1 =0x6C; //8 data bits, no parity, one stop bit; SBCON1 =0x43; //Enable UART1, prescaler 1 } void System_Init(void) { PCA0MD &= ~0x40; //Watchdog timer off OSCICN |= 0x03; //And the internal high-frequency oscillator is enabled by programming the oscillator frequency to run } /***************************************************************** * *Port initialization function *****************************************************************/ void Port_IO_Init(void) { P0SKIP = 0xCF; P1SKIP = 0x3F; XBR0 = 0x01; XBR1 = 0x40; XBR2 = 0x01; } /***************************************************************** * Function: serial receive interrupt service function uart1 * Resources: register 3 * Export: Interput_Char *****************************************************************/ void UART1_Interrupt(void) interrupt 16 { if(SCON1&0x01) //RI1==1? { temp1=SBUF1; SCON1 &=0xFE; //RI1=0 SBUF1=temp1; SCON1 &=0xFD; //TI1=0 SBUF1 = 0x00; } }
Uart1.c
#include <c8051f340.h> char Uart1_TX(char c); void Delay (unsigned char delay); void Delay (unsigned char delay) { unsigned char uart_i; for(uart_i=0;uart_i<delay;uart_i++); } char Uart1_TX (char c) { while (!(SCON1 & 0x02)); // wait until UART1 is ready to transmit SCON1 &= ~0x02; // clear TI1 interrupt flag return (SBUF1 = c); // output <c> using UART 1 }
Header files
Deviceinit.h
#ifndef _Deviceinit_h #define _Deviceinit_h extern unsigned char temp1; extern void UART1_Init (void); extern void System_Init(void); extern void Port_IO_Init(void); #endif
Uart.h
#ifndef _Uart_h #define _Uart_h extern unsigned char temp1; extern char Uart1_TX(char c); extern void Delay (unsigned char delay); #endif
The errors are Linker errors relating to missing definitions.
The source code is not relevant here - the problem is in the inputs provided (or not provided) to the Linker.
I'm not really clear on why you want to use libraries for this but, if you do, it means you will have to break your project up:
You will need a separate project to create each library;
Then you will also need an "application" project which uses these libraries.