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I'm using a Infineon C515C, with the RTX51 Full package. However I'm having difficulty addressing the Message Control Register (MCR0 and MCR1) specifically the TXRQ bit in MCR1. Does anyone know where I would find this registers definition?
Carefully read page 6-92 of the C515C User's Manual, it says: Each element of the message control register is made of two complementary bits. This special mechanism allows to selectively set or reset specific elements (leaving others unchanged) without requiring read-modify-write cycles. TXRQ bit is not directly addressable, but must be set using the special mechanism described in that manual page. If you still have troubles, on Infineon web site there is a full appnote with full source code. http://www.infineon.com/cgi/ecrm.dll/ecrm/scripts/prod_ov.jsp?oid=13734&cat_oid=-8136