00001 /*This file is prepared for Doxygen automatic documentation generation.*/ 00013 00014 /* Copyright (c) 2009 Atmel Corporation. All rights reserved. 00015 * 00016 * Redistribution and use in source and binary forms, with or without 00017 * modification, are permitted provided that the following conditions are met: 00018 * 00019 * 1. Redistributions of source code must retain the above copyright notice, 00020 * this list of conditions and the following disclaimer. 00021 * 00022 * 2. Redistributions in binary form must reproduce the above copyright notice, 00023 * this list of conditions and the following disclaimer in the documentation 00024 * and/or other materials provided with the distribution. 00025 * 00026 * 3. The name of Atmel may not be used to endorse or promote products derived 00027 * from this software without specific prior written permission. 00028 * 00029 * 4. This software may only be redistributed and used in connection with an Atmel 00030 * AVR product. 00031 * 00032 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED 00033 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00034 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE EXPRESSLY AND 00035 * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, 00036 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 00037 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 00038 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 00039 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00040 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 00041 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00042 */ 00043 00044 /*_____ I N C L U D E S ____________________________________________________*/ 00045 00046 #include "config.h" 00047 #include "lib_mcu/usb/usb_drv.h" 00048 #include "usb_descriptors.h" 00049 00050 #include "uart_usb_lib.h" 00051 00052 /*_____ M A C R O S ________________________________________________________*/ 00053 00054 /*_____ D E F I N I T I O N ________________________________________________*/ 00055 00056 00057 Uchar rx_counter; 00058 00059 /*_____ D E C L A R A T I O N ______________________________________________*/ 00060 00064 void uart_usb_init(void) 00065 { 00066 rx_counter = 0; 00067 } 00068 00074 bit uart_usb_test_hit(void) 00075 { 00076 if(!Is_device_enumerated()) 00077 return FALSE; 00078 00079 if (!rx_counter) 00080 { 00081 Usb_select_endpoint(RX_EP); 00082 if (Is_usb_receive_out()) 00083 { 00084 rx_counter = Usb_byte_counter(); 00085 if (!rx_counter) 00086 { 00087 Usb_ack_receive_out(); 00088 } 00089 } 00090 } 00091 return (rx_counter!=0); 00092 } 00093 00102 char uart_usb_getchar(void) 00103 { 00104 register Uchar data_rx; 00105 00106 Usb_select_endpoint(RX_EP); 00107 if (!rx_counter) while (!uart_usb_test_hit()); 00108 data_rx=Usb_read_byte(); 00109 rx_counter--; 00110 if (!rx_counter) Usb_ack_receive_out(); 00111 return data_rx; 00112 } 00113 00114 00121 bit uart_usb_tx_ready(void) 00122 { 00123 if(!Is_device_enumerated()) 00124 return FALSE; 00125 00126 if (!Is_usb_write_enabled()) 00127 { 00128 return FALSE; 00129 } 00130 return TRUE; 00131 } 00132 00142 int uart_usb_putchar(int data_to_send) 00143 { 00144 uart_usb_send_buffer((U8*)&data_to_send, 1); 00145 return data_to_send; 00146 } 00147 00148 00149 00157 void uart_usb_send_buffer(U8 *buffer, U8 nb_data) 00158 { 00159 U8 zlp; 00160 00161 if(!Is_device_enumerated()) 00162 return; 00163 00164 // Compute if zlp required 00165 if(nb_data%TX_EP_SIZE) 00166 { zlp=FALSE;} 00167 else { zlp=TRUE; } 00168 00169 Usb_select_endpoint(TX_EP); 00170 while (nb_data) 00171 { 00172 while(Is_usb_write_enabled()==FALSE); // Wait Endpoint ready 00173 while(Is_usb_write_enabled() && nb_data) 00174 { 00175 Usb_write_byte(*buffer); 00176 buffer++; 00177 nb_data--; 00178 } 00179 Usb_ack_in_ready(); 00180 } 00181 if(zlp) 00182 { 00183 while(Is_usb_write_enabled()==FALSE); // Wait Endpoint ready 00184 Usb_ack_in_ready(); 00185 } 00186 }