diff options
Diffstat (limited to 'Marlin/src/HAL/DUE/usb/sysclk.c')
| -rw-r--r-- | Marlin/src/HAL/DUE/usb/sysclk.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/Marlin/src/HAL/DUE/usb/sysclk.c b/Marlin/src/HAL/DUE/usb/sysclk.c new file mode 100644 index 0000000..cbb4e2c --- /dev/null +++ b/Marlin/src/HAL/DUE/usb/sysclk.c @@ -0,0 +1,122 @@ +/** + * \file + * + * \brief Chip-specific system clock management functions. + * + * Copyright (c) 2011-2015 Atmel Corporation. All rights reserved. + * + * \asf_license_start + * + * \page License + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * 3. The name of Atmel may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 4. This software may only be redistributed and used in connection with an + * Atmel microcontroller product. + * + * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * \asf_license_stop + * + */ +/* + * Support and FAQ: visit <a href="https://www.atmel.com/design-support/">Atmel Support</a> + */ + +#ifdef ARDUINO_ARCH_SAM + +#include "sysclk.h" + +/// @cond 0 +/**INDENT-OFF**/ +#ifdef __cplusplus +extern "C" { +#endif +/**INDENT-ON**/ +/// @endcond + +/** + * \weakgroup sysclk_group + * @{ + */ + +#if defined(CONFIG_USBCLK_SOURCE) || defined(__DOXYGEN__) +/** + * \brief Enable full speed USB clock. + * + * \note The SAM3X PMC hardware interprets div as div+1. For readability the hardware div+1 + * is hidden in this implementation. Use div as div effective value. + * + * \param pll_id Source of the USB clock. + * \param div Actual clock divisor. Must be superior to 0. + */ +void sysclk_enable_usb(void) +{ + Assert(CONFIG_USBCLK_DIV > 0); + +#ifdef CONFIG_PLL0_SOURCE + if (CONFIG_USBCLK_SOURCE == USBCLK_SRC_PLL0) { + struct pll_config pllcfg; + + pll_enable_source(CONFIG_PLL0_SOURCE); + pll_config_defaults(&pllcfg, 0); + pll_enable(&pllcfg, 0); + pll_wait_for_lock(0); + pmc_switch_udpck_to_pllack(CONFIG_USBCLK_DIV - 1); + pmc_enable_udpck(); + return; + } +#endif + + if (CONFIG_USBCLK_SOURCE == USBCLK_SRC_UPLL) { + + pmc_enable_upll_clock(); + pmc_switch_udpck_to_upllck(CONFIG_USBCLK_DIV - 1); + pmc_enable_udpck(); + return; + } +} + +/** + * \brief Disable full speed USB clock. + * + * \note This implementation does not switch off the PLL, it just turns off the USB clock. + */ +void sysclk_disable_usb(void) +{ + pmc_disable_udpck(); +} +#endif // CONFIG_USBCLK_SOURCE + +//! @} + +/// @cond 0 +/**INDENT-OFF**/ +#ifdef __cplusplus +} +#endif +/**INDENT-ON**/ +/// @endcond + +#endif // ARDUINO_ARCH_SAM |