Posted on November 14, 2007 at 15:23I have slowly been integrating and bringing up the USB low-speed example (i.e. the ST USBLS Library 4.21) on a REva ST7263BSK from C:/RIDE/EXAMPLES/ST7/REVA/63B/COSMIC/ST7USBLS/ and, because debugging over ICC doesn't seem to work, have been trying to get serial working over SCI to gain some insight on what's going on.
However, when I enable interrupt mode SCI usage with:
Code:
<BR> SCI_Init(SCI_DEFAULT_PARAM1, SCI_DEFAULT_PARAM2); <BR> SCI_Select_Baudrate(SCI_PR_13 | (SCI_TR_4 | SCI_RR_4)); // 9600 @ Fcpu = 8 MHz <BR> SCI_Mode(SCI_TX_ENABLE); <BR> SCI_IT_Enable(SCI_TRANSMIT_REGISTER_READY | <BR> SCI_FRAME_TRANSMITTED); <BR>
the USB enumeration/configuration fails, regardless of whether I actually use the SCI via printf or SCI_PutString. If I simply #if 0...#endif the above SCI initialization code, the USB enumeration works again.
Is there anything expressly restricted or forbidden about using these two blocks concurrently? Neither pins are multiplexed, so I cannot see that there would be.
[ This message was edited by: gerickson on 14-11-2007 19:54 ]
