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https://github.com/oliverschmidt/contiki.git
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- For the CC2538, simplify handling of USB_CDC_ACM_LINE_STATE events. Ignore the Carrier Control (RTS) bit when receiving a SET_CONTROL_LINE _STATE request, we are a full duplex device. - Improve behaviour of the CC2531 USB stick when there is no process on the host to read IN data. Basically, we adopt the CC2538 approach and we only send data when a DTE is present
295 lines
7.9 KiB
C
295 lines
7.9 KiB
C
/*
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* Copyright (c) 2012, Philippe Retornaz
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* Copyright (c) 2012, EPFL STI IMT LSRO1 -- Mobots group
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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* Platform process which implements a UART-like functionality over
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* the cc2531 dongle's USB hardware.
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*
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* With it in place, putchar can be redirected to the USB and USB
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* incoming traffic can be handled as input
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*
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* \author
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* Philippe Retornaz (EPFL) - Original code
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* George Oikonomou - <oikonomou@users.sourceforge.net>
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* Turned this to a 'serial over USB' platform process
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*/
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#include "contiki.h"
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#include "sys/process.h"
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#include "usb/common/usb-api.h"
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#include "usb/common/cdc-acm/cdc-acm.h"
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#include "usb/common/usb.h"
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#include "usb/common/usb-arch.h"
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/*---------------------------------------------------------------------------*/
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static const struct {
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uint8_t size;
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uint8_t type;
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uint16_t langid;
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} lang_id = { sizeof(lang_id), 3, 0x0409 };
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static struct {
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uint8_t size;
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uint8_t type;
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uint16_t string[16];
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} string_serial_nr = {
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sizeof(string_serial_nr),
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3, {
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'A', 'A', 'A', 'A', 'A', 'A', 'A', 'A',
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'A', 'A', 'A', 'A', 'A', 'A', 'A', 'A'
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}
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};
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static const struct {
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uint8_t size;
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uint8_t type;
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uint16_t string[10];
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} string_manufacturer = {
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sizeof(string_manufacturer),
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3,
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{ 'E', 'P', 'F', 'L', '-', 'L', 'S', 'R', 'O', '1' }
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};
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static const struct {
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uint8_t size;
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uint8_t type;
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uint16_t string[18];
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} string_product = {
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sizeof(string_product),
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3, {
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'C', 'C', '2', '5', '3', '1', ' ',
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'D', 'e', 'v', 'e', 'l', '-', 'B', 'o', 'a', 'r', 'd'
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}
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};
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/*---------------------------------------------------------------------------*/
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#define EPIN 0x82
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#define EPOUT 0x03
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#define BUFFER_SIZE USB_EP2_SIZE
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static USBBuffer data_rx_urb;
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static USBBuffer data_tx_urb;
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static uint8_t usb_rx_data[BUFFER_SIZE];
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static uint8_t enabled = 0;
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#if USB_SERIAL_CONF_BUFFERED
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#define SLIP_END 0300
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static uint8_t usb_tx_data[BUFFER_SIZE];
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static uint8_t buffered_data = 0;
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#endif
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/* Callback to the input handler */
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static int (* input_handler)(unsigned char c);
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/*---------------------------------------------------------------------------*/
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uint8_t *
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usb_class_get_string_descriptor(uint16_t lang, uint8_t string)
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{
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switch (string) {
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case 0:
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return (uint8_t *)&lang_id;
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case 1:
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return (uint8_t *)&string_manufacturer;
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case 2:
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return (uint8_t *)&string_product;
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case 3:
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return (uint8_t *)&string_serial_nr;
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default:
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return NULL;
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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set_serial_number(void)
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{
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uint8_t i;
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uint8_t *ieee = &X_IEEE_ADDR;
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uint8_t lown, highn;
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uint8_t c;
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for(i = 0; i < 8; i++) {
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lown = ieee[i] & 0x0F;
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highn = ieee[i] >> 4;
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c = lown > 9 ? 'A' + lown - 0xA : lown + '0';
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string_serial_nr.string[14 - i * 2 + 1] = c;
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c = highn > 9 ? 'A' + highn - 0xA : highn + '0';
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string_serial_nr.string[14 - i * 2] = c;
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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queue_rx_urb(void)
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{
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data_rx_urb.flags = USB_BUFFER_PACKET_END; /* Make sure we are getting immediately the packet. */
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data_rx_urb.flags |= USB_BUFFER_NOTIFY;
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data_rx_urb.data = usb_rx_data;
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data_rx_urb.left = BUFFER_SIZE;
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data_rx_urb.next = NULL;
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usb_submit_recv_buffer(EPOUT, &data_rx_urb);
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}
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/*---------------------------------------------------------------------------*/
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static void
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do_work(void)
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{
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unsigned int events;
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events = usb_get_global_events();
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if(events & USB_EVENT_CONFIG) {
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/* Enable endpoints */
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enabled = 1;
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usb_setup_bulk_endpoint(EPIN);
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usb_setup_bulk_endpoint(EPOUT);
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queue_rx_urb();
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}
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if(events & USB_EVENT_RESET) {
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enabled = 0;
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}
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events = usb_cdc_acm_get_events();
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if(events & USB_CDC_ACM_LINE_STATE) {
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uint8_t line_state = usb_cdc_acm_get_line_state();
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if(line_state & USB_CDC_ACM_DTE) {
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enabled = 1;
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} else {
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enabled = 0;
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}
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}
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if(!enabled) {
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return;
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}
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events = usb_get_ep_events(EPOUT);
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if((events & USB_EP_EVENT_NOTIFICATION)
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&& !(data_rx_urb.flags & USB_BUFFER_SUBMITTED)) {
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if(!(data_rx_urb.flags & USB_BUFFER_FAILED)) {
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if(input_handler) {
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uint8_t len;
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uint8_t i;
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len = BUFFER_SIZE - data_rx_urb.left;
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for(i = 0; i < len; i++) {
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input_handler(usb_rx_data[i]);
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}
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}
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}
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queue_rx_urb();
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}
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}
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/*---------------------------------------------------------------------------*/
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#if USB_SERIAL_CONF_BUFFERED
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void
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usb_serial_flush()
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{
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if(buffered_data == BUFFER_SIZE) {
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data_tx_urb.flags = 0;
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} else {
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data_tx_urb.flags = USB_BUFFER_SHORT_END;
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}
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data_tx_urb.flags |= USB_BUFFER_NOTIFY;
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data_tx_urb.next = NULL;
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data_tx_urb.data = usb_tx_data;
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data_tx_urb.left = buffered_data;
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buffered_data = 0;
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usb_submit_xmit_buffer(EPIN, &data_tx_urb);
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}
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/*---------------------------------------------------------------------------*/
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void
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usb_serial_writeb(uint8_t b)
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{
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if(!enabled) {
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buffered_data = 0;
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return;
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}
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usb_tx_data[buffered_data] = b;
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buffered_data++;
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if(buffered_data == BUFFER_SIZE || b == SLIP_END || b == '\n') {
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usb_serial_flush();
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}
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}
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/*---------------------------------------------------------------------------*/
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#else
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void
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usb_serial_writeb(uint8_t b)
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{
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if(!enabled) {
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return;
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}
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data_tx_urb.flags = USB_BUFFER_SHORT_END;
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data_tx_urb.flags |= USB_BUFFER_NOTIFY;
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data_tx_urb.next = NULL;
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data_tx_urb.data = &b;
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data_tx_urb.left = 1;
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usb_submit_xmit_buffer(EPIN, &data_tx_urb);
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}
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#endif
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/*---------------------------------------------------------------------------*/
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PROCESS(usb_serial_process, "USB-Serial process");
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(usb_serial_process, ev, data)
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{
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PROCESS_BEGIN();
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set_serial_number();
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usb_setup();
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usb_cdc_acm_setup();
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usb_set_global_event_process(&usb_serial_process);
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usb_cdc_acm_set_event_process(&usb_serial_process);
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usb_set_ep_event_process(EPIN, &usb_serial_process);
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usb_set_ep_event_process(EPOUT, &usb_serial_process);
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while(1) {
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PROCESS_WAIT_EVENT();
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if(ev == PROCESS_EVENT_EXIT) {
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break;
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}
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if(ev == PROCESS_EVENT_POLL) {
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do_work();
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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void
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usb_serial_set_input(int (* input)(unsigned char c))
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{
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input_handler = input;
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}
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/*---------------------------------------------------------------------------*/
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void
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usb_serial_init()
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{
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process_start(&usb_serial_process, NULL);
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}
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