dma usage

Can you post your code so that we can see how you are using the driver. As a heads up when you pass flags into the transmit/receive calls only send one flag at a time. For example if you try to enable stop of length and set the transfer width at the same time only one flag will stick. Instead you need to call the function twice sending each flag in individually.

Hi, here's the code segment I'm using dma cnnected to an hardware peripheral 32 bit wide:

//call back function
void dma_txdone (void* handle,void  *data)
{
dma_txcomplete = 1;
}# define TXFRAME_LENGTH 1024// dma_32_bit_tx_a has 15 bit address //counter
int main(){
alt_dma_txchan tx;
....
if ((tx = alt_dma_txchan_open ("/dev/dma_32bit_tx_a")) == NULL)
{
printf ("Error: failed to open device DMA_1\n");
exit (1);
}
alt_dma_txchan_reg (tx);
alt_dma_txchan_ioctl(tx,ALT_DMA_TX_ONLY_ON,0);
alt_dma_txchan_ioctl(tx,ALT_DMA_SET_MODE_32,0);
if (alt_dma_txchan_send (tx,(constvoid*)buffer_tx,TXFRAME_LENGTH,dma_txdone,NULL) < 0)
{
printf ("\n\rError: failed to post transmit request\n");
sprintf(message,"Err: tx failed");
lcd_sprint_line(message,4,SOPC_GRAPHIC_LCD_A_BASE);
exit (1);
}
....
}

yes, it is, I forgot to put a Macro to make the code readable. That's the address for the input/output port. Anyway thatks to pointed out this, I will correct the code.