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(...)
  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         _putc(*str);
  75         i++;
  76         str++;
  77     }
  78     return i;
  79 }
  80
  81 uint16_t USBSerial::writeBlock(uint8_t * buf, uint16_t size)
  82 {
  83     if (size > txbuf.free())
  84     {
  85         size = txbuf.free();
  86     }
  87     if (size > 0)
  88     {
  89         for (uint8_t i = 0; i < size; i++)
  90         {
  91             txbuf.queue(buf[i]);
  92         }
  93         usb->endpointSetInterrupt(CDC_BulkIn.bEndpointAddress, true);
  94     }
  95     return size;
  96 }
  97
  98 bool USBSerial::USBEvent_EPIn(uint8_t bEP, uint8_t bEPStatus)
  99 {
 100     /*
 101      * Called in ISR context
 102      */
 103
 104 //     static bool needToSendNull = false;
 105
 106     bool r = true;
 107
 108     if (bEP != CDC_BulkIn.bEndpointAddress)
 109         return false;
 110
 111     iprintf("USBSerial:EpIn: 0x%02X\n", bEPStatus);
 112
 113     uint8_t b[MAX_PACKET_SIZE_EPBULK];
 114
 115     int l = txbuf.available();
 116     iprintf("%d bytes queued\n", l);
 117     if (l > 0)
 118     {
 119         if (l > MAX_PACKET_SIZE_EPBULK)
 120             l = MAX_PACKET_SIZE_EPBULK;
 121         iprintf("Sending %d bytes:\n\t", l);
 122         int i;
 123         for (i = 0; i < l; i++) {
 124             txbuf.dequeue(&b[i]);
 125             if (b[i] >= 32 && b[i] < 128)
 126                 iprintf("%c", b[i]);
 127             else {
 128                 iprintf("\\x%02X", b[i]);
 129             }
 130         }
 131         iprintf("\nSending...\n");
 132         send(b, l);
 133         iprintf("Sent\n");
 134 //         if (l == 64 && txbuf.available() == 0)
 135 //             needToSendNull = true;
 136         if (txbuf.available() == 0)
 137             r = false;
 138     }
 139     else
 140     {
 141 //         if (needToSendNull)
 142 //         {
 143 //             send(NULL, 0);
 144 //             needToSendNull = false;
 145 //         }
 146 //         else
 147 //         {
 148             r = false;
 149 //         }
 150 //         usb->endpointSetInterrupt(bEP, false);
 151     }
 152     iprintf("USBSerial:EpIn Complete\n");
 153     return r;
 154 }
 155
 156 bool USBSerial::USBEvent_EPOut(uint8_t bEP, uint8_t bEPStatus)
 157 {
 158     /*
 159      * Called in ISR context
 160      */
 161
 162     bool r = true;
 163
 164     iprintf("USBSerial:EpOut\n");
 165     if (bEP != CDC_BulkOut.bEndpointAddress)
 166         return false;
 167
 168     if (rxbuf.free() < MAX_PACKET_SIZE_EPBULK)
 169     {
 170 //         usb->endpointSetInterrupt(bEP, false);
 171         return false;
 172     }
 173
 174     uint8_t c[MAX_PACKET_SIZE_EPBULK];
 175     uint32_t size = 64;
 176
 177     //we read the packet received and put it on the circular buffer
 178     readEP(c, &size);
 179     iprintf("Read %ld bytes:\n\t", size);
 180     for (uint8_t i = 0; i < size; i++) {
 181         rxbuf.queue(c[i]);
 182         if (c[i] >= 32 && c[i] < 128)
 183         {
 184             iprintf("%c", c[i]);
 185         }
 186         else
 187         {
 188             iprintf("\\x%02X", c[i]);
 189         }
 190         if (c[i] == '\n')
 191             nl_in_rx++;
 192     }
 193     iprintf("\nQueued, %d empty\n", rxbuf.free());
 194
 195     if (rxbuf.free() < MAX_PACKET_SIZE_EPBULK)
 196     {
 197 //         usb->endpointSetInterrupt(bEP, false);
 198         r = false;
 199     }
 200
 201     usb->readStart(CDC_BulkOut.bEndpointAddress, MAX_PACKET_SIZE_EPBULK);
 202     iprintf("USBSerial:EpOut Complete\n");
 203     return r;
 204 }
 205
 206 /*
 207 bool USBSerial::EpCallback(uint8_t bEP, uint8_t bEPStatus) {
 208     if (bEP == CDC_BulkOut.bEndpointAddress) {
 209         uint8_t c[65];
 210         uint32_t size = 0;
 211
 212         //we read the packet received and put it on the circular buffer
 213         readEP(c, &size);
 214         for (uint8_t i = 0; i < size; i++) {
 215             buf.queue(c[i]);
 216         }
 217
 218         //call a potential handler
 219         rx.call();
 220
 221         // We reactivate the endpoint to receive next characters
 222         usb->readStart(CDC_BulkOut.bEndpointAddress, MAX_PACKET_SIZE_EPBULK);
 223         return true;
 224     }
 225     return false;
 226 }*/
 227
 228 uint8_t USBSerial::available()
 229 {
 230     return rxbuf.available();
 231 }
 232
 233 void USBSerial::on_module_loaded()
 234 {
 235     this->register_for_event(ON_MAIN_LOOP);
 236 //     this->kernel->streams->append_stream(this);
 237 }
 238
 239 void USBSerial::on_main_loop(void *argument)
 240 {
 241 //     this->kernel->streams->printf("!");
 242     if (nl_in_rx)
 243     {
 244         string received;
 245         while (available())
 246         {
 247             char c = _getc();
 248             if( c == '\n' )
 249             {
 250                 struct SerialMessage message;
 251                 message.message = received;
 252                 message.stream = this;
 253                 iprintf("USBSerial Received: %s\n", message.message.c_str());
 254                 this->kernel->call_event(ON_CONSOLE_LINE_RECEIVED, &message );
 255                 return;
 256             }
 257             else
 258             {
 259                 received += c;
 260             }
 261         }
 262     }
 263 }
 264
 265 void USBSerial::on_attach()
 266 {
 267     this->kernel->streams->append_stream(this);
 268     writeBlock((uint8_t *) "Smoothie\nok\n", 12);
 269 }
 270
 271 void USBSerial::on_detach()
 272 {
 273     this->kernel->streams->remove_stream(this);
 274     txbuf.flush();
 275     rxbuf.flush();
 276     nl_in_rx = 0;
 277 }