src/libs/USBDevice/USBSerial/USBSerial.cpp

   1 /* Copyright (c) 2010-2011 mbed.org, MIT License
   2 *
   3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
   4 * and associated documentation files (the "Software"), to deal in the Software without
   5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
   6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
   7 * Software is furnished to do so, subject to the following conditions:
   8 *
   9 * The above copyright notice and this permission notice shall be included in all copies or
  10 * substantial portions of the Software.
  11 *
  12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
  13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  17 */
  18
  19 #include <cstdint>
  20 #include <cstdio>
  21
  22 #include "USBSerial.h"
  23
  24 #include "libs/Kernel.h"
  25 #include "libs/SerialMessage.h"
  26
  27 // extern void setled(int, bool);
  28 #define setled(a, b) do {} while (0)
  29
  30 #define iprintf(...) do { } while (0)
  31
  32 USBSerial::USBSerial(USB *u): USBCDC(u), rxbuf(128), txbuf(128)
  33 {
  34     usb = u;
  35     nl_in_rx = 0;
  36 }
  37
  38 int USBSerial::_putc(int c)
  39 {
  40 //     send((uint8_t *)&c, 1);
  41     if (c == '\r')
  42         return 1;
  43     if (txbuf.free())
  44         txbuf.queue(c);
  45
  46     usb->endpointSetInterrupt(CDC_BulkIn.bEndpointAddress, true);
  47 //     usb->endpointTriggerInterrupt(CDC_BulkIn.bEndpointAddress);
  48     return 1;
  49 }
  50
  51 int USBSerial::_getc()
  52 {
  53     uint8_t c = 0;
  54     setled(4, 1); while (rxbuf.isEmpty()); setled(4, 0);
  55     rxbuf.dequeue(&c);
  56     if (rxbuf.free() == MAX_PACKET_SIZE_EPBULK)
  57     {
  58         usb->endpointSetInterrupt(CDC_BulkOut.bEndpointAddress, true);
  59         iprintf("rxbuf has room for another packet, interrupt enabled\n");
  60 //         usb->endpointTriggerInterrupt(CDC_BulkOut.bEndpointAddress);
  61     }
  62     if (nl_in_rx > 0)
  63         if (c == '\n')
  64             nl_in_rx--;
  65
  66     return c;
  67 }
  68
  69 int USBSerial::puts(const char *str)
  70 {
  71     int i = 0;
  72     while (*str)
  73     {
  74         if ((*str != '\r') && txbuf.free())
  75             txbuf.queue(*str);
  76         i++;
  77         str++;
  78     }
  79     usb->endpointSetInterrupt(CDC_BulkIn.bEndpointAddress, true);
  80     return i;
  81 }
  82
  83 uint16_t USBSerial::writeBlock(uint8_t * buf, uint16_t size)
  84 {
  85     if (size > txbuf.free())
  86     {
  87         size = txbuf.free();
  88     }
  89     if (size > 0)
  90     {
  91         for (uint8_t i = 0; i < size; i++)
  92         {
  93             txbuf.queue(buf[i]);
  94         }
  95         usb->endpointSetInterrupt(CDC_BulkIn.bEndpointAddress, true);
  96     }
  97     return size;
  98 }
  99
 100 bool USBSerial::USBEvent_EPIn(uint8_t bEP, uint8_t bEPStatus)
 101 {
 102     /*
 103      * Called in ISR context
 104      */
 105
 106 //     static bool needToSendNull = false;
 107
 108     bool r = true;
 109
 110     if (bEP != CDC_BulkIn.bEndpointAddress)
 111         return false;
 112
 113     iprintf("USBSerial:EpIn: 0x%02X\n", bEPStatus);
 114
 115     uint8_t b[MAX_PACKET_SIZE_EPBULK];
 116
 117     int l = txbuf.available();
 118     iprintf("%d bytes queued\n", l);
 119     if (l > 0)
 120     {
 121         if (l > MAX_PACKET_SIZE_EPBULK)
 122             l = MAX_PACKET_SIZE_EPBULK;
 123         iprintf("Sending %d bytes:\n\t", l);
 124         int i;
 125         for (i = 0; i < l; i++) {
 126             txbuf.dequeue(&b[i]);
 127             if (b[i] >= 32 && b[i] < 128)
 128                 iprintf("%c", b[i]);
 129             else {
 130                 iprintf("\\x%02X", b[i]);
 131             }
 132         }
 133         iprintf("\nSending...\n");
 134         send(b, l);
 135         iprintf("Sent\n");
 136 //         if (l == 64 && txbuf.available() == 0)
 137 //             needToSendNull = true;
 138         if (txbuf.available() == 0)
 139             r = false;
 140     }
 141     else
 142     {
 143 //         if (needToSendNull)
 144 //         {
 145 //             send(NULL, 0);
 146 //             needToSendNull = false;
 147 //         }
 148 //         else
 149 //         {
 150             r = false;
 151 //         }
 152 //         usb->endpointSetInterrupt(bEP, false);
 153     }
 154     iprintf("USBSerial:EpIn Complete\n");
 155     return r;
 156 }
 157
 158 bool USBSerial::USBEvent_EPOut(uint8_t bEP, uint8_t bEPStatus)
 159 {
 160     /*
 161      * Called in ISR context
 162      */
 163
 164     bool r = true;
 165
 166     iprintf("USBSerial:EpOut\n");
 167     if (bEP != CDC_BulkOut.bEndpointAddress)
 168         return false;
 169
 170     if (rxbuf.free() < MAX_PACKET_SIZE_EPBULK)
 171     {
 172 //         usb->endpointSetInterrupt(bEP, false);
 173         return false;
 174     }
 175
 176     uint8_t c[MAX_PACKET_SIZE_EPBULK];
 177     uint32_t size = 64;
 178
 179     //we read the packet received and put it on the circular buffer
 180     readEP(c, &size);
 181     iprintf("Read %ld bytes:\n\t", size);
 182     for (uint8_t i = 0; i < size; i++) {
 183         rxbuf.queue(c[i]);
 184         if (c[i] >= 32 && c[i] < 128)
 185         {
 186             iprintf("%c", c[i]);
 187         }
 188         else
 189         {
 190             iprintf("\\x%02X", c[i]);
 191         }
 192         if (c[i] == '\n')
 193             nl_in_rx++;
 194     }
 195     iprintf("\nQueued, %d empty\n", rxbuf.free());
 196
 197     if (rxbuf.free() < MAX_PACKET_SIZE_EPBULK)
 198     {
 199 //         usb->endpointSetInterrupt(bEP, false);
 200         r = false;
 201     }
 202
 203     usb->readStart(CDC_BulkOut.bEndpointAddress, MAX_PACKET_SIZE_EPBULK);
 204     iprintf("USBSerial:EpOut Complete\n");
 205     return r;
 206 }
 207
 208 /*
 209 bool USBSerial::EpCallback(uint8_t bEP, uint8_t bEPStatus) {
 210     if (bEP == CDC_BulkOut.bEndpointAddress) {
 211         uint8_t c[65];
 212         uint32_t size = 0;
 213
 214         //we read the packet received and put it on the circular buffer
 215         readEP(c, &size);
 216         for (uint8_t i = 0; i < size; i++) {
 217             buf.queue(c[i]);
 218         }
 219
 220         //call a potential handler
 221         rx.call();
 222
 223         // We reactivate the endpoint to receive next characters
 224         usb->readStart(CDC_BulkOut.bEndpointAddress, MAX_PACKET_SIZE_EPBULK);
 225         return true;
 226     }
 227     return false;
 228 }*/
 229
 230 uint8_t USBSerial::available()
 231 {
 232     return rxbuf.available();
 233 }
 234
 235 void USBSerial::on_module_loaded()
 236 {
 237     this->register_for_event(ON_MAIN_LOOP);
 238 //     this->kernel->streams->append_stream(this);
 239 }
 240
 241 void USBSerial::on_main_loop(void *argument)
 242 {
 243 //     this->kernel->streams->printf("!");
 244     if (nl_in_rx)
 245     {
 246         string received;
 247         while (available())
 248         {
 249             char c = _getc();
 250             if( c == '\n' )
 251             {
 252                 struct SerialMessage message;
 253                 message.message = received;
 254                 message.stream = this;
 255                 iprintf("USBSerial Received: %s\n", message.message.c_str());
 256                 this->kernel->call_event(ON_CONSOLE_LINE_RECEIVED, &message );
 257                 return;
 258             }
 259             else
 260             {
 261                 received += c;
 262             }
 263         }
 264     }
 265 }
 266
 267 void USBSerial::on_attach()
 268 {
 269     this->kernel->streams->append_stream(this);
 270     writeBlock((uint8_t *) "Smoothie\nok\n", 12);
 271 }
 272
 273 void USBSerial::on_detach()
 274 {
 275     this->kernel->streams->remove_stream(this);
 276     txbuf.flush();
 277     rxbuf.flush();
 278     nl_in_rx = 0;
 279 }