Point Labs / USBDevice

adds a USB serial port to your design

Dependents:   Example_WatchDog_Timer

USBSerial/USBSerial.cpp@77:3e96144c2bf2, 2018-11-26 (annotated)

Committer:
rlanders73
Date:
Mon Nov 26 20:46:02 2018 +0000
Revision:
77:3e96144c2bf2
Parent:
70:2c525a50f1b6 
added _write, and _read functions to make more compatible with the UARTserial lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 1:80ab0d068708 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
samux 1:80ab0d068708 2 *
samux 1:80ab0d068708 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:80ab0d068708 4 * and associated documentation files (the "Software"), to deal in the Software without
samux 1:80ab0d068708 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
samux 1:80ab0d068708 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
samux 1:80ab0d068708 7 * Software is furnished to do so, subject to the following conditions:
samux 1:80ab0d068708 8 *
samux 1:80ab0d068708 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:80ab0d068708 10 * substantial portions of the Software.
samux 1:80ab0d068708 11 *
samux 1:80ab0d068708 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:80ab0d068708 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:80ab0d068708 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:80ab0d068708 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:80ab0d068708 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:80ab0d068708 17 */
samux 1:80ab0d068708 18
samux 1:80ab0d068708 19 #include "stdint.h"
samux 1:80ab0d068708 20 #include "USBSerial.h"
samux 1:80ab0d068708 21
samux 1:80ab0d068708 22 int USBSerial::_putc(int c) {
samux 6:d0945750af57 23 if (!terminal_connected)
samux 6:d0945750af57 24 return 0;
samux 1:80ab0d068708 25 send((uint8_t *)&c, 1);
samux 1:80ab0d068708 26 return 1;
samux 1:80ab0d068708 27 }
samux 1:80ab0d068708 28
samux 1:80ab0d068708 29 int USBSerial::_getc() {
bogdanm 11:eeb3cbbaa996 30 uint8_t c = 0;
samux 1:80ab0d068708 31 while (buf.isEmpty());
samux 1:80ab0d068708 32 buf.dequeue(&c);
samux 1:80ab0d068708 33 return c;
samux 1:80ab0d068708 34 }
samux 1:80ab0d068708 35
rlanders73 77:3e96144c2bf2 36 int USBSerial::_read(void* buffer, int length)
rlanders73 77:3e96144c2bf2 37 {
rlanders73 77:3e96144c2bf2 38 int data_read = 0;
rlanders73 77:3e96144c2bf2 39
rlanders73 77:3e96144c2bf2 40 uint8_t *ptr = static_cast<uint8_t *>(buffer);
rlanders73 77:3e96144c2bf2 41
rlanders73 77:3e96144c2bf2 42 if (length == 0) {
rlanders73 77:3e96144c2bf2 43 return 0;
rlanders73 77:3e96144c2bf2 44 }
rlanders73 77:3e96144c2bf2 45
rlanders73 77:3e96144c2bf2 46 if (buf.isEmpty()) {
rlanders73 77:3e96144c2bf2 47 return -EAGAIN;
rlanders73 77:3e96144c2bf2 48 }
rlanders73 77:3e96144c2bf2 49
rlanders73 77:3e96144c2bf2 50 while (data_read < length && !buf.isEmpty()) {
rlanders73 77:3e96144c2bf2 51 buf.dequeue(ptr++);
rlanders73 77:3e96144c2bf2 52 data_read++;
rlanders73 77:3e96144c2bf2 53 }
rlanders73 77:3e96144c2bf2 54
rlanders73 77:3e96144c2bf2 55 return data_read;
rlanders73 77:3e96144c2bf2 56 }
rlanders73 77:3e96144c2bf2 57
rlanders73 77:3e96144c2bf2 58 int USBSerial::_write(uint8_t * buf, uint16_t size) {
rlanders73 77:3e96144c2bf2 59 uint16_t sent = size;
rlanders73 77:3e96144c2bf2 60
rlanders73 77:3e96144c2bf2 61 // This handles the case where we have more to send than one bulk frame
rlanders73 77:3e96144c2bf2 62 while(size > MAX_PACKET_SIZE_EPBULK && send(buf, MAX_PACKET_SIZE_EPBULK)) {
rlanders73 77:3e96144c2bf2 63 size -= MAX_PACKET_SIZE_EPBULK;
rlanders73 77:3e96144c2bf2 64 }
rlanders73 77:3e96144c2bf2 65 if(!send(buf, size)) {
rlanders73 77:3e96144c2bf2 66 return -EAGAIN;
rlanders73 77:3e96144c2bf2 67 }
rlanders73 77:3e96144c2bf2 68 return sent;
rlanders73 77:3e96144c2bf2 69 }
samux 1:80ab0d068708 70
samux 1:80ab0d068708 71 bool USBSerial::writeBlock(uint8_t * buf, uint16_t size) {
samux 1:80ab0d068708 72 if(size > MAX_PACKET_SIZE_EPBULK) {
samux 1:80ab0d068708 73 return false;
samux 1:80ab0d068708 74 }
samux 1:80ab0d068708 75 if(!send(buf, size)) {
samux 1:80ab0d068708 76 return false;
samux 1:80ab0d068708 77 }
samux 1:80ab0d068708 78 return true;
samux 1:80ab0d068708 79 }
samux 1:80ab0d068708 80
samux 1:80ab0d068708 81
samux 1:80ab0d068708 82
mbed_official 47:a0cd9646ecd1 83 bool USBSerial::EPBULK_OUT_callback() {
samux 1:80ab0d068708 84 uint8_t c[65];
samux 1:80ab0d068708 85 uint32_t size = 0;
samux 1:80ab0d068708 86
samux 1:80ab0d068708 87 //we read the packet received and put it on the circular buffer
samux 1:80ab0d068708 88 readEP(c, &size);
bogdanm 11:eeb3cbbaa996 89 for (uint32_t i = 0; i < size; i++) {
samux 1:80ab0d068708 90 buf.queue(c[i]);
samux 1:80ab0d068708 91 }
samux 1:80ab0d068708 92
Kojto 70:2c525a50f1b6 93 //call a potential handlenr
Kojto 70:2c525a50f1b6 94 if (rx)
Kojto 70:2c525a50f1b6 95 rx.call();
samux 1:80ab0d068708 96
samux 1:80ab0d068708 97 return true;
samux 1:80ab0d068708 98 }
samux 1:80ab0d068708 99
samux 1:80ab0d068708 100 uint8_t USBSerial::available() {
samux 1:80ab0d068708 101 return buf.available();
samux 1:80ab0d068708 102 }
Kojto 70:2c525a50f1b6 103
Kojto 70:2c525a50f1b6 104 bool USBSerial::connected() {
Kojto 70:2c525a50f1b6 105 return terminal_connected;
Kojto 70:2c525a50f1b6 106 }