27     struct serial_device* uart = (struct serial_device*) dev->user_data;  in rt_serial_init()  local
34             rt_memset(uart->int_rx->rx_buffer, 0,  in rt_serial_init()
35                       sizeof(uart->int_rx->rx_buffer));  in rt_serial_init()
36             uart->int_rx->read_index = uart->int_rx->save_index = 0;  in rt_serial_init()
41             rt_memset(uart->int_tx->tx_buffer, 0,  in rt_serial_init()
42                       sizeof(uart->int_tx->tx_buffer));  in rt_serial_init()
43             uart->int_tx->write_index = uart->int_tx->save_index = 0;  in rt_serial_init()
53 static void rt_serial_savechar(struct serial_device* uart, char ch)  in rt_serial_savechar()  argument
60     uart->int_rx->rx_buffer[uart->int_rx->save_index] = ch;  in rt_serial_savechar()
61     uart->int_rx->save_index ++;  in rt_serial_savechar()
62     if (uart->int_rx->save_index >= UART_RX_BUFFER_SIZE)  in rt_serial_savechar()
63         uart->int_rx->save_index = 0;  in rt_serial_savechar()
66     if (uart->int_rx->save_index == uart->int_rx->read_index)  in rt_serial_savechar()
68         uart->int_rx->read_index ++;  in rt_serial_savechar()
69         if (uart->int_rx->read_index >= UART_RX_BUFFER_SIZE)  in rt_serial_savechar()
70             uart->int_rx->read_index = 0;  in rt_serial_savechar()
95     struct serial_device* uart;  in rt_serial_read()  local
99     uart = (struct serial_device*)dev->user_data;  in rt_serial_read()
114             if (uart->int_rx->read_index != uart->int_rx->save_index)  in rt_serial_read()
116                 *ptr++ = uart->int_rx->rx_buffer[uart->int_rx->read_index];  in rt_serial_read()
122                 uart->int_rx->read_index ++;  in rt_serial_read()
123                 if (uart->int_rx->read_index >= UART_RX_BUFFER_SIZE)  in rt_serial_read()
124                     uart->int_rx->read_index = 0;  in rt_serial_read()
142             while (uart->uart_device->ustat & USTAT_RCV_READY)  in rt_serial_read()
144                 *ptr = uart->uart_device->urxh & 0xff;  in rt_serial_read()
159     struct serial_device* uart;  in rt_serial_write()  local
163     uart = (struct serial_device*)dev->user_data;  in rt_serial_write()
174         while (uart->int_tx->save_index != uart->int_tx->write_index)  in rt_serial_write()
177             uart->int_tx->tx_buffer[uart->int_tx->save_index] = *ptr++;  in rt_serial_write()
182             uart->int_tx->save_index ++;  in rt_serial_write()
185             if (uart->int_tx->save_index >= UART_TX_BUFFER_SIZE)  in rt_serial_write()
186                 uart->int_tx->save_index = 0;  in rt_serial_write()
204                 while (!(uart->uart_device->ustat & USTAT_TXB_EMPTY));  in rt_serial_write()
205                 uart->uart_device->utxh = '\r';  in rt_serial_write()
208             while (!(uart->uart_device->ustat & USTAT_TXB_EMPTY));  in rt_serial_write()
209             uart->uart_device->utxh = (*ptr & 0xFF);  in rt_serial_write()
266     struct serial_device* uart = (struct serial_device*) device->user_data;  in rt_hw_serial_isr()  local
272     while (uart->uart_device->ustat & USTAT_RCV_READY)  in rt_hw_serial_isr()
274         rt_serial_savechar(uart, uart->uart_device->urxh & 0xff);  in rt_hw_serial_isr()
283         rx_length = uart->int_rx->read_index > uart->int_rx->save_index ?  in rt_hw_serial_isr()
284                     UART_RX_BUFFER_SIZE - uart->int_rx->read_index + uart->int_rx->save_index :  in rt_hw_serial_isr()
285                     uart->int_rx->save_index - uart->int_rx->read_index;  in rt_hw_serial_isr()