/*
ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include "ch.h"
#include "hal.h"
static void pwmpcb(PWMDriver *pwmp) {
(void)pwmp;
palClearPad(GPIOC, GPIOC_LED4);
}
static void pwmc1cb(PWMDriver *pwmp) {
(void)pwmp;
palSetPad(GPIOC, GPIOC_LED4);
}
static PWMConfig pwmcfg = {
10000, /* 10kHz PWM clock frequency. */
10000, /* Initial PWM period 1S. */
pwmpcb,
{
{PWM_OUTPUT_ACTIVE_HIGH, pwmc1cb},
{PWM_OUTPUT_DISABLED, NULL},
{PWM_OUTPUT_DISABLED, NULL},
{PWM_OUTPUT_DISABLED, NULL}
},
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012,2013 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file serial_usb.c
* @brief Serial over USB Driver code.
*
* @addtogroup SERIAL_USB
* @{
*/
#include "ch.h"
#include "hal.h"
#if HAL_USE_SERIAL_USB || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables and types. */
/*===========================================================================*/
/*
* Current Line Coding.
*/
static cdc_linecoding_t linecoding = {
{0x00, 0x96, 0x00, 0x00}, /* 38400. */
LC_STOP_1, LC_PARITY_NONE, 8
};
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*
* Interface implementation.
*/
static size_t write(void *ip, const uint8_t *bp, size_t n) {
return chOQWriteTimeout(&((SerialUSBDriver *)ip)->oqueue, bp,
n, TIME_INFINITE);
}
static size_t read(void *ip, uint8_t *bp, size_t n) {
return chIQReadTimeout(&((SerialUSBDriver *)ip)->iqueue, bp,
n, TIME_INFINITE);
}
static msg_t put(void *ip, uint8_t b) {
return chOQPutTimeout(&((SerialUSBDriver *)ip)->oqueue, b, TIME_INFINITE);
}
static msg_t get(void *ip) {
return chIQGetTimeout(&((SerialUSBDriver *)ip)->iqueue, TIME_INFINITE);
}
static msg_t putt(void *ip, uint8_t b, systime_t timeout) {
return chOQPutTimeout(&((SerialUSBDriver *)ip)->oqueue, b, timeout);
}
static msg_t gett(void *ip, systime_t timeout) {
return chIQGetTimeout(&((SerialUSBDriver *)ip)->iqueue, timeout);
}
static size_t writet(void *ip, const uint8_t *bp, size_t n, systime_t time) {
return chOQWriteTimeout(&((SerialUSBDriver *)ip)->oqueue, bp, n, time);
}
static size_t readt(void *ip, uint8_t *bp, size_t n, systime_t time) {
return chIQReadTimeout(&((SerialUSBDriver *)ip)->iqueue, bp, n, time);
}
static const struct SerialUSBDriverVMT vmt = {
write, read, put, get,
putt, gett, writet, readt
};
/**
* @brief Notification of data removed from the input queue.
*/
static void inotify(GenericQueue *qp) {
size_t n, maxsize;
SerialUSBDriver *sdup = chQGetLink(qp);
/* If the USB driver is not in the appropriate state then transactions
must not be started.*/
if ((usbGetDriverStateI(sdup->config->usbp) != USB_ACTIVE) ||
(sdup->state != SDU_READY))
return;
/* If there is in the queue enough space to hold at least one packet and
a transaction is not yet started then a new transaction is started for
the available space.*/
maxsize = sdup->config->usbp->epc[sdup->config->bulk_out]->out_maxsize;
if (!usbGetReceiveStatusI(sdup->config->usbp, sdup->config->bulk_out) &&
((n = chIQGetEmptyI(&sdup->iqueue)) >= maxsize)) {
chSysUnlock();
n = (n / maxsize) * maxsize;
usbPrepareQueuedReceive(sdup->config->usbp,
sdup->config->bulk_out,
&sdup->iqueue, n);
chSysLock();
usbStartReceiveI(sdup->config->usbp, sdup->config->bulk_out);
}
}
/**
* @brief Notification of data inserted into the output queue.
*/
static void onotify(GenericQueue *qp) {
size_t n;
SerialUSBDriver *sdup = chQGetLink(qp);
/* If the USB driver is not in the appropriate state then transactions
must not be started.*/
if ((usbGetDriverStateI(sdup->config->usbp) != USB_ACTIVE) ||
(sdup->state != SDU_READY))
return;
/* If there is not an ongoing transaction and the output queue contains
data then a new transaction is started.*/
if (!usbGetTransmitStatusI(sdup->config->usbp, sdup->config->bulk_in) &&
((n = chOQGetFullI(&sdup->oqueue)) > 0)) {
chSysUnlock();
usbPrepareQueuedTransmit(sdup->config->usbp,
sdup->config->bulk_in,
&sdup->oqueue, n);
chSysLock();
usbStartTransmitI(sdup->config->usbp, sdup->config->bulk_in);
}
}
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Serial Driver initialization.
* @note This function is implicitly invoked by @p halInit(), there is
* no need to explicitly initialize the driver.
*
* @init
*/
void sduInit(void) {
}
/**
* @brief Initializes a generic full duplex driver object.
* @details The HW dependent part of the initialization has to be performed
* outside, usually in the hardware initialization code.
*
* @param[out] sdup pointer to a @p SerialUSBDriver structure
*
* @init
*/
void sduObjectInit(SerialUSBDriver *sdup) {
sdup->vmt = &vmt;
chEvtInit(&sdup->event);
sdup->state = SDU_STOP;
chIQInit(&sdup->iqueue, sdup->ib, SERIAL_USB_BUFFERS_SIZE, inotify, sdup);
chOQInit(&sdup->oqueue, sdup->ob, SERIAL_USB_BUFFERS_SIZE, onotify, sdup);
}
/**
* @brief Configures and starts the driver.
*
* @param[in] sdup pointer to a @p SerialUSBDriver object
* @param[in] config the serial over USB driver configuration
*
* @api
*/
void sduStart(SerialUSBDriver *sdup, const SerialUSBConfig *config) {
USBDriver *usbp = config->usbp;
chDbgCheck(sdup != NULL, "sduStart");
chSysLock();
chDbgAssert((sdup->state == SDU_STOP) || (sdup->state == SDU_READY),
"sduStart(), #1",
"invalid state");
usbp->in_params[config->bulk_in - 1] = sdup;
usbp->out_params[config->bulk_out - 1] = sdup;
usbp->in_params[config->int_in - 1] = sdup;
sdup->config = config;
sdup->state = SDU_READY;
chSysUnlock();
}
/**
* @brief Stops the driver.
* @details Any thread waiting on the driver's queues will be awakened with
* the message @p Q_RESET.
*
* @param[in] sdup pointer to a @p SerialUSBDriver object
*
* @api
*/
void sduStop(SerialUSBDriver *sdup) {
USBDriver *usbp = sdup->config->usbp;
chDbgCheck(sdup != NULL, "sdStop");
chSysLock();
chDbgAssert((sdup->state == SDU_STOP) || (sdup->state == SDU_READY),
"sduStop(), #1",
"invalid state");
/* Driver in stopped state.*/
usbp->in_params[sdup->config->bulk_in - 1] = NULL;
usbp->out_params[sdup->config->bulk_out - 1] = NULL;
usbp->in_params[sdup->config->int_in - 1] = NULL;
sdup->state = SDU_STOP;
/* Queues reset in order to signal the driver stop to the application.*/
chnAddFlagsI(sdup, CHN_DISCONNECTED);
chIQResetI(&sdup->iqueue);
chOQResetI(&sdup->oqueue);
chSchRescheduleS();
chSysUnlock();
}
/**
* @brief USB device configured handler.
*
* @param[in] sdup pointer to a @p SerialUSBDriver object
*
* @iclass
*/
void sduConfigureHookI(SerialUSBDriver *sdup) {
USBDriver *usbp = sdup->config->usbp;
chIQResetI(&sdup->iqueue);
chOQResetI(&sdup->oqueue);
chnAddFlagsI(sdup, CHN_CONNECTED);
/* Starts the first OUT transaction immediately.*/
usbPrepareQueuedReceive(usbp, sdup->config->bulk_out, &sdup->iqueue,
usbp->epc[sdup->config->bulk_out]->out_maxsize);
usbStartReceiveI(usbp, sdup->config->bulk_out);
}
/**
* @brief Default requests hook.
* @details Applications wanting to use the Serial over USB driver can use
* this function as requests hook in the USB configuration.
* The following requests are emulated:
* - CDC_GET_LINE_CODING.
* - CDC_SET_LINE_CODING.
* - CDC_SET_CONTROL_LINE_STATE.
* .
*
* @param[in] usbp pointer to the @p USBDriver object
* @return The hook status.
* @retval TRUE Message handled internally.
* @retval FALSE Message not handled.
*/
bool_t sduRequestsHook(USBDriver *usbp) {
if ((usbp->setup[0] & USB_RTYPE_TYPE_MASK) == USB_RTYPE_TYPE_CLASS) {
switch (usbp->setup[1]) {
case CDC_GET_LINE_CODING:
usbSetupTransfer(usbp, (uint8_t *)&linecoding, sizeof(linecoding), NULL);
return TRUE;
case CDC_SET_LINE_CODING:
usbSetupTransfer(usbp, (uint8_t *)&linecoding, sizeof(linecoding), NULL);
return TRUE;
case CDC_SET_CONTROL_LINE_STATE:
/* Nothing to do, there are no control lines.*/
usbSetupTransfer(usbp, NULL, 0, NULL);
return TRUE;
default:
return FALSE;
}
}
return FALSE;
}
/**
* @brief Default data transmitted callback.
* @details The application must use this function as callback for the IN
* data endpoint.
*
* @param[in] usbp pointer to the @p USBDriver object
* @param[in] ep endpoint number
*/
void sduDataTransmitted(USBDriver *usbp, usbep_t ep) {
size_t n;
SerialUSBDriver *sdup = usbp->in_params[ep - 1];
if (sdup == NULL)
return;
chSysLockFromIsr();
chnAddFlagsI(sdup, CHN_OUTPUT_EMPTY);
if ((n = chOQGetFullI(&sdup->oqueue)) > 0) {
/* The endpoint cannot be busy, we are in the context of the callback,
so it is safe to transmit without a check.*/
chSysUnlockFromIsr();
usbPrepareQueuedTransmit(usbp, ep, &sdup->oqueue, n);
chSysLockFromIsr();
usbStartTransmitI(usbp, ep);
}
else if ((usbp->epc[ep]->in_state->txsize > 0) &&
!(usbp->epc[ep]->in_state->txsize &
(usbp->epc[ep]->in_maxsize - 1))) {
/* Transmit zero sized packet in case the last one has maximum allowed
size. Otherwise the recipient may expect more data coming soon and
not return buffered data to app. See section 5.8.3 Bulk Transfer
Packet Size Constraints of the USB Specification document.*/
chSysUnlockFromIsr();
usbPrepareQueuedTransmit(usbp, ep, &sdup->oqueue, 0);
chSysLockFromIsr();
usbStartTransmitI(usbp, ep);
}
chSysUnlockFromIsr();
}
/**
* @brief Default data received callback.
* @details The application must use this function as callback for the OUT
* data endpoint.
*
* @param[in] usbp pointer to the @p USBDriver object
* @param[in] ep endpoint number
*/
void sduDataReceived(USBDriver *usbp, usbep_t ep) {
size_t n, maxsize;
SerialUSBDriver *sdup = usbp->out_params[ep - 1];
if (sdup == NULL)
return;
chSysLockFromIsr();
chnAddFlagsI(sdup, CHN_INPUT_AVAILABLE);
/* Writes to the input queue can only happen when there is enough space
to hold at least one packet.*/
maxsize = usbp->epc[ep]->out_maxsize;
if ((n = chIQGetEmptyI(&sdup->iqueue)) >= maxsize) {
/* The endpoint cannot be busy, we are in the context of the callback,
so a packet is in the buffer for sure.*/
chSysUnlockFromIsr();
n = (n / maxsize) * maxsize;
usbPrepareQueuedReceive(usbp, ep, &sdup->iqueue, n);
chSysLockFromIsr();
usbStartReceiveI(usbp, ep);
}
chSysUnlockFromIsr();
}
/**
* @brief Default data received callback.
* @details The application must use this function as callback for the IN
* interrupt endpoint.
*
* @param[in] usbp pointer to the @p USBDriver object
* @param[in] ep endpoint number
*/
void sduInterruptTransmitted(USBDriver *usbp, usbep_t ep) {
(void)usbp;
(void)ep;
}
#endif /* HAL_USE_SERIAL */
/** @} */
