FR_TXFF 52 bsp/boot/arm/integrator/debug.c #define FR_TXFF 0x20 /* Transmit FIFO full */ FR_TXFF 66 bsp/drv/dev/serial/pl011.c #define FR_TXFF 0x20 /* Transmit FIFO full */ FR_TXFF 45 bsp/hal/arm/integrator/diag.c #define FR_TXFF 0x20 /* Transmit FIFO full */