int fdterm; // FILEDESCRIPTOR RETURNED BY OPEN
int i; // for for();
FILE * fpterm; // FILE pointer returned by fdopen
int uart1_rxcount = 0; //counts received data from uart
alt_u8 uart1_rxbuffer[5]; //stores received data from uart
int pattern=0xF;//data to fill memory
unsigned int *p = (unsigned int*)(0x00010000);//Startadress
unsigned int *j = (unsigned int*)(0x00010100);//Destinationadress
//DMA_BASE= 0x00020880 //UART_BASE = 0x00020820
int main(void)
{
//Write to memory something
for (i=0; i<5; i++)
{
IOWR_32DIRECT(p/*+i*/, 0, pattern);//writes pattern from memory to memory+5
}
//to open the uart-channel in read/write-modus
// fdterm = open("/dev/uart1", O_RDWR | O_NONBLOCK | O_NOCTTY);
// fpterm = fdopen(fdterm,"rw+");
// fprintf(fpterm,"UART1 STARTED\r\n"); // check initial output
//printf("JTAG STARTED\r\n");
IOWR_ALTERA_AVALON_DMA_CONTROL(DMA_BASE, 0x0); // dma transfer disabled
//Send some words
IOWR_ALTERA_AVALON_DMA_STATUS(DMA_BASE, 0);
IOWR_ALTERA_AVALON_DMA_RADDRESS(DMA_BASE, (int)p); //Pointer to memory
IOWR_ALTERA_AVALON_DMA_WADDRESS(DMA_BASE, (int)j); //Pointer to your device
IOWR_ALTERA_AVALON_DMA_LENGTH(DMA_BASE, 4); //Sending words (1 word == 4 bytes)
IOWR_ALTERA_AVALON_DMA_CONTROL(DMA_BASE, 0x0CC); //See description of dma control register
return 0;
}
This is the code which copies from p (memory) to j(memory). Why can´t i copy from p(memory) to j(uart)?
I hope there is no huge thinking mistake
http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif
thanks for help!
Honored Contributor
