You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.3 KiB
48 lines
1.3 KiB
/** @defgroup crs_file CRS
|
|
*
|
|
* @ingroup STM32xx
|
|
*
|
|
* @brief <b>libopencm3 STM32 Clock Recovery Subsystem</b>
|
|
*
|
|
* @version 1.0.0
|
|
*
|
|
* @date 5 Feb 2014
|
|
*
|
|
* LGPL License Terms @ref lgpl_license
|
|
*/
|
|
|
|
/*
|
|
* This file is part of the libopencm3 project.
|
|
*
|
|
* This library is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <libopencm3/stm32/crs.h>
|
|
#include <libopencm3/stm32/rcc.h>
|
|
|
|
/**
|
|
* This function enables automatic trimming of internal RC oscillator by USB SOF
|
|
* frames
|
|
*/
|
|
void crs_autotrim_usb_enable(void)
|
|
{
|
|
rcc_periph_clock_enable(RCC_CRS);
|
|
|
|
CRS_CFGR &= ~CRS_CFGR_SYNCSRC;
|
|
CRS_CFGR |= CRS_CFGR_SYNCSRC_USB_SOF;
|
|
|
|
CRS_CR |= CRS_CR_AUTOTRIMEN;
|
|
CRS_CR |= CRS_CR_CEN;
|
|
}
|
|
|
|
|