I'm having problems implementig usage of the PDC on my AT91SAM9XE512
I learned, that the PDC is configured through control registers of the
peripheral devices; like in the code below
// write receive-buffer-address to receive-pointer-register
*AT91C_SPI0_RPR = receive_buffer_address;
// write buffer-size to receive-counter-register
*AT91C_SPI0_RCR = receive_buffer_size;
// enbale receive
*AT91C_SPI0_PTCR = AT91C_PDC_RXTEN;
// enbale transmit
*AT91C_SPI0_PTCR = AT91C_PDC_TXTEN;
but i need to access the PDC directly to change specific channel or
FIQ-configurations, which i can't do by simply changing these control
How do I directly access and control the PDC and it's
subsystems/controls in C (I am currently using IAR workbench)?
Please help. Thank you.