- #if !defined(KDBG_UART0_BUS_INIT)
- #if defined(KDBG_UART0_BUS_RX) || defined(KDBG_UART0_BUS_TX)
- #error KDBG_UART0_BUS_INIT, KDBG_UART0_BUS_RX and KDBG_UART0_BUS_TX must be defined together
- #endif
- #define KDBG_UART0_BUS_INIT do {} while (0)
- #define KDBG_UART0_BUS_TX do {} while (0)
- #define KDBG_UART0_BUS_RX do {} while (0)
- #elif !defined(KDBG_UART0_BUS_RX) || !defined(KDBG_UART0_BUS_TX)
- #error KDBG_UART0_BUS_INIT, KDBG_UART0_BUS_RX and KDBG_UART0_BUS_TX must be defined together
+ #ifndef KDBG_UART0_BUS_INIT
+ #define KDBG_UART0_BUS_INIT do {} while (0)
+ #endif
+ #ifndef KDBG_UART0_BUS_RX
+ #define KDBG_UART0_BUS_RX do {} while (0)
+ #endif
+ #ifndef KDBG_UART0_BUS_TX
+ #define KDBG_UART0_BUS_TX do {} while (0)