308 lines
8.3 KiB
C
308 lines
8.3 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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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup cc2538-usb
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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 the
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* cc2538's USB hardware.
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*
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* This has been ported over from platform/cc2530dk
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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, ported for cc2538
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*/
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#include "contiki.h"
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#include "sys/process.h"
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#include "net/linkaddr.h"
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#include "usb-api.h"
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#include "usb.h"
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#include "usb-arch.h"
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#include "cdc-acm/cdc-acm.h"
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#include "ieee-addr.h"
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#include <stdint.h>
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/*---------------------------------------------------------------------------*/
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#define DEBUG 0
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#if DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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struct lang_id {
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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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};
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static const struct lang_id lang_id = { sizeof(lang_id), 3, 0x0409 };
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/*---------------------------------------------------------------------------*/
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struct serial_nr {
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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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};
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static struct serial_nr serial_nr = {
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sizeof(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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/*---------------------------------------------------------------------------*/
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struct manufacturer {
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uint8_t size;
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uint8_t type;
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uint16_t string[17];
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};
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static const struct manufacturer manufacturer = {
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sizeof(manufacturer),
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3,
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{
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'T', 'e', 'x', 'a', 's', ' ',
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'I', 'n', 's', 't', 'r', 'u', 'm', 'e', 'n', 't', 's'
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}
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};
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/*---------------------------------------------------------------------------*/
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struct product {
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uint8_t size;
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uint8_t type;
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uint16_t string[21];
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};
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static const struct product product = {
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sizeof(product),
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3,
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{
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'c', 'c', '2', '5', '3', '8', ' ',
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'S', 'y', 's', 't', 'e', 'm', '-', 'o', 'n', '-', 'C', 'h', 'i', 'p'
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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 RX_BUFFER_SIZE USB_EP3_SIZE
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#define TX_BUFFER_SIZE (USB_EP2_SIZE - 1)
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typedef struct _USBBuffer usb_buffer;
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static usb_buffer data_rx_urb;
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static usb_buffer data_tx_urb;
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static uint8_t usb_rx_data[RX_BUFFER_SIZE];
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static uint8_t enabled = 0;
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#define SLIP_END 0300
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static uint8_t usb_tx_data[TX_BUFFER_SIZE];
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static uint8_t buffered_data = 0;
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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 *)&manufacturer;
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case 2:
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return (uint8_t *)&product;
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case 3:
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return (uint8_t *)&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[8];
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uint8_t lown, highn;
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uint8_t c;
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ieee_addr_cpy_to(ieee, 8);
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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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serial_nr.string[i * 2 + 1] = c;
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c = highn > 9 ? 'A' + highn - 0xA : highn + '0';
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serial_nr.string[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;
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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 = RX_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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/* Configure EPs. Don't enable them yet, until the CDC line is up */
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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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PRINTF("CDC-ACM event 0x%04x, Line State = %u\n", events, 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 = RX_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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void
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usb_serial_flush()
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{
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if(buffered_data == 0) {
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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 = 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 == TX_BUFFER_SIZE) {
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usb_serial_flush();
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}
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}
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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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/*---------------------------------------------------------------------------*/
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/** @} */
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