Kiel uVision generates an error coming from uart.c line 86 in the project KeypadUART.uvprojx

[Rightrax]

Hello Kevin

I am new to c programming and arm mbed lpc1768 etc and as a learner with a need to start using a matrix keypad in a project I came across your great help however when I went to compile in uvision I got the following - your help to a newbie is appreciated. I realize this was sometime ago.

In the meantime thanks Kevin

Build started: Project: KeypadUART
*** Using Compiler 'V5.06 update 7 (build 960)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin'
*** Note: Rebuilding project, since 'Options->Output->Create Batch File' is selected.
Rebuild target 'Target 1'
assembling startup_LPC17xx.s...
compiling system_LPC17xx.c...
compiling main.c...
uart.h(22): warning: #1-D: last line of file ends without a newline
void UART0_INIT(void);
main.c(52): warning: #940-D: missing return statement at end of non-void function "readbite"
}
main.c: 2 warnings, 0 errors
compiling delay.c...
compiling uart.c...
uart.h(22): warning: #1-D: last line of file ends without a newline
void UART0_INIT(void);
uart.c(86): error: #20: identifier "SystemFrequency" is undefined
Clock_Frequency = SystemFrequency/4;
uart.c(94): warning: #1-D: last line of file ends without a newline
}
uart.c(68): warning: #177-D: variable "ch" was declared but never referenced
char ch;
uart.c(69): warning: #177-D: variable "i" was declared but never referenced
int i;
uart.c: 4 warnings, 1 error
linking...
.\Objects\KeypadUART.axf: error: L6002U: Could not open file .\objects\uart.o: No such file or directory
Finished: 0 information, 0 warning, 0 error and 1 fatal error messages.
".\Objects\KeypadUART.axf" - 2 Error(s), 6 Warning(s).
Target not created.
Build Time Elapsed: 00:00:07