Eric Haver wrote:
I have converted the Atmel CDC-Serial example to run under NutOS.
When I enable Endpoint0 in the UDP_IER and in UDP_CSR0, I can see it in the
UDP_IMR before I leave the interrupt, but on the next interrupt, the UDP_IMR
does not show Endpoint0 enabled.
Any ideas?
Answering my own question here.
The ATMEL defines are not exactly the same as the NutOS Defines:
ATMEL:
#define AT91C_CKGR_USBDIV_0 (0x0 << 28) // (CKGR) Divider output is PLL clock output
#define AT91C_CKGR_USBDIV_1 (0x1 << 28) // (CKGR) Divider output is PLL clock output divided by 2
#define AT91C_CKGR_USBDIV_2 (0x2 << 28) // (CKGR) Divider output is PLL clock output divided by 4
In NutOS we see in at91_pmc.h:
#define CKGR_USBDIV_1 0x00000000 /*!< \brief Divider output is PLL clock output. */
#define CKGR_USBDIV_2 0x10000000 /*!< \brief Divider output is PLL clock output divided by 2. */
#define CKGR_USBDIV_4 0x20000000 /*!< \brief Divider output is PLL clock output divided by 4. */
So when I converted:
AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;
it should have become:
outr(CKGR_PLLR, inr(CKGR_PLLR) | CKGR_USBDIV_2) ;
instead of the obvious.
Einfach ist es immer, nicht.
*E
