stream transfer between uart and onchiop memory

Altera_Forum · ‎03-19-2005

Hello:

I use the DMA controler to connect the data rom and Uart and use it to connect the instructing ram and data ram.But the uart can't receive the data.My code is below:

IOWR_ALTERA_AVALON_DMA_STATUS(DMA_BASE,0);

IOWR_ALTERA_AVALON_DMA_CONTROL(DMA_BASE,0);

IOWR_ALTERA_AVALON_DMA_LENGTH(DMA_BASE,0xff);

IOWR_ALTERA_AVALON_DMA_RADDRESS(DMA_BASE,(int)buffer);

IOWR_ALTERA_AVALON_DMA_WADDRESS(DMA_BASE,UART_BASE);

IOWR_ALTERA_AVALON_DMA_CONTROL(DMA_BASE,ALTERA_AVALON_DMA_CONTROL_GO_MSK|ALTERA_AVALON_DMA_CONTROL_LEEN_MSK|ALTERA_AVALON_DMA_CONTROL_WCON_MSK|ALTERA_AVALON_DMA_CONTROL_BYTE_MSK);

Have problem?

while((IORD_ALTERA_AVALON_DMA_STATUS(DMA_BASE)& ALTERA_AVALON_DMA_STATUS_BUSY_MSK)!=0);

Altera_Forum · ‎03-19-2005

Yes, me too.

i can read uart through DMA, but can't write!

why? SOPC configuration or else?

Altera_Forum · ‎03-20-2005

To Simon.Embed;

The receive you use what code ,like me?

and in the pc you use what tool?