Hi,
My professor asked me to do offline processing for signal. I think for that i would only require a processor core, memory and probably a UART.
I have already built those hardware from design kit.
I wanted to write application code(in Keil) for my algorithm which takes data from memory process it and store it back into memory.
Since most of the design example(EDK) are in assembly but I m more familiar with C but addressing of peripheral and starting reset handler routine. I do not know how to write in C. I did not use CMSIS also:(
Could you suggest some thing which makes it easier
I guess most of the things I checked.
FPGA pin assignment ok.
-driver of UART for FPGA installed and also recognized by the PC.
-tera-term application is intalled as well.
-As specify the UART baud rate 19200. GCLK=100Mhz, HCLK=10MHZ. and baud rate=19200. with (10/19200*16)=32 as count value in baud rate generator.
In simulation I checked. I guess not worked there.
Can you post your program code?
- UART registers declarations
- How you initialize the UART
- The test sequence (how you sent data to UART)
Thanks
For a simple case I just tried to send a single value as shown.
#include "stdio.h"
#define AHB_UART_BASE (*((volatile unsigned long *)(0x51000000)))
int main ()
{
int a,b,c;
a=6;
b=5;
c=a+b;
AHB_UART_BASE=c;
return 0;
}
///Vector table for program.
/ Define where the top of memory is.
#define TOP_OF_RAM 0xFFC
extern int main(void); // Use C-library initialization function.
__attribute__ ((section("__Vectors")))
static void (* const vector_table[])(void) =
(void (*)(void)) TOP_OF_RAM, // Initial value for stack pointer.
(void (*)(void)) main, // Reset handler is C initialization.
0, // No HardFault handler, just cause lockup.
0, // No NMI handler, just cause lockup.
0,
0,0,0,0,0,0,0//... // Additional handlers would be listed here.
(void) UART_handler
};
Sorry for the delay.
You write the character with value of 11 (0xB) to the UART. However, this might not be a character that can be displayed on your terminal.
So please try
AHB_UART_BASE='A'; // Character 'A'
Another issue is that the main() is finished after you send out the character.
You might want to add a dead loop :
int main (void)
AHB_UART_BASE='A';
while(1); // deadloop
Hope this helps.