RA_UART_LSR
while ((uart_read(RA_UART_LSR) & UART_LSR_TEMT) == 0)
if ((uart_read(RA_UART_LSR) & UART_LSR_TDRQ) != 0)
if ((uart_read(RA_UART_LSR) & UART_LSR_TEMT) != 0)
while ((uart_read(RA_UART_LSR) & UART_LSR_DR) == 0)
if ((uart_read(RA_UART_LSR) & LSR_RXRDY) == 0)
while ((uart_read(RA_UART_LSR) & LSR_TXRDY) == 0 && --timo > 0)
while ((uart_read(RA_UART_LSR) & LSR_TSRE) == 0 && --timo > 0)
[COM_REG_LSR] = RA_UART_LSR,