STM32F3 Discovery + libopencm3, using USART.

I made STM32 development environment by gcc + libopencm3.
libopencm3 examples include using USART  for STM32F429, but STM32F3 is nothing.
So, I refer usart_console program for STM32F4 then successfully run on the STM32F3 discovery board.
I changed USART register name for running on STM32F3.

void console_putc(char c) {         uint32_t        reg;         do {                 reg = USART_ISR(CONSOLE_UART);         } while ((reg & USART_ISR_TXE) == 0);         USART_TDR(CONSOLE_UART) = (uint32_t) c & 0xff; }

char console_getc(int wait) {         uint32_t        reg;         do {                 reg = USART_ISR(CONSOLE_UART);         } while ((wait != 0) && ((reg & USART_ISR_RXNE) == 0));         return (reg & USART_ISR_RXNE) ? USART_RDR(CONSOLE_UART) : '\000'; }

USART_ISR is "Interrupt and status register".(STM32F4 is USART_SR)
USART_TDR is "Transmit Data Register".(STM32F4 is USART_DR)

USART_RDR is "Receive Data Register".(STM32F4 is USART_DR)

Some constitution of registers are different from STM32F4 in STM32F3.
  

Have a good your computing!