takashi kadono / Mbed OS Nucleo446_SSD1331

Color Oled(SSD1331) connect to STMicroelectronics Nucleo-F466

Dependencies:   ssd1331

mbed-os/targets/TARGET_Atmel/TARGET_SAM_CortexM4/services/delay/sam/cycle_counter.h@3:f3764f852aa8, 2018-10-11 (annotated)

Committer:
kadonotakashi
Date:
Thu Oct 11 02:27:46 2018 +0000
Revision:
3:f3764f852aa8
Parent:
0:8fdf9a60065b 
Nucreo 446 + SSD1331 test version;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kadonotakashi 0:8fdf9a60065b 1 /**
kadonotakashi 0:8fdf9a60065b 2 * \file
kadonotakashi 0:8fdf9a60065b 3 *
kadonotakashi 0:8fdf9a60065b 4 * \brief ARM functions for busy-wait delay loops
kadonotakashi 0:8fdf9a60065b 5 *
kadonotakashi 0:8fdf9a60065b 6 * Copyright (c) 2014-2015 Atmel Corporation. All rights reserved.
kadonotakashi 0:8fdf9a60065b 7 *
kadonotakashi 0:8fdf9a60065b 8 * \asf_license_start
kadonotakashi 0:8fdf9a60065b 9 *
kadonotakashi 0:8fdf9a60065b 10 * \page License
kadonotakashi 0:8fdf9a60065b 11 *
kadonotakashi 0:8fdf9a60065b 12 * Redistribution and use in source and binary forms, with or without
kadonotakashi 0:8fdf9a60065b 13 * modification, are permitted provided that the following conditions are met:
kadonotakashi 0:8fdf9a60065b 14 *
kadonotakashi 0:8fdf9a60065b 15 * 1. Redistributions of source code must retain the above copyright notice,
kadonotakashi 0:8fdf9a60065b 16 * this list of conditions and the following disclaimer.
kadonotakashi 0:8fdf9a60065b 17 *
kadonotakashi 0:8fdf9a60065b 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
kadonotakashi 0:8fdf9a60065b 19 * this list of conditions and the following disclaimer in the documentation
kadonotakashi 0:8fdf9a60065b 20 * and/or other materials provided with the distribution.
kadonotakashi 0:8fdf9a60065b 21 *
kadonotakashi 0:8fdf9a60065b 22 * 3. The name of Atmel may not be used to endorse or promote products derived
kadonotakashi 0:8fdf9a60065b 23 * from this software without specific prior written permission.
kadonotakashi 0:8fdf9a60065b 24 *
kadonotakashi 0:8fdf9a60065b 25 * 4. This software may only be redistributed and used in connection with an
kadonotakashi 0:8fdf9a60065b 26 * Atmel microcontroller product.
kadonotakashi 0:8fdf9a60065b 27 *
kadonotakashi 0:8fdf9a60065b 28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
kadonotakashi 0:8fdf9a60065b 29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
kadonotakashi 0:8fdf9a60065b 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
kadonotakashi 0:8fdf9a60065b 31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
kadonotakashi 0:8fdf9a60065b 32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
kadonotakashi 0:8fdf9a60065b 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
kadonotakashi 0:8fdf9a60065b 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
kadonotakashi 0:8fdf9a60065b 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
kadonotakashi 0:8fdf9a60065b 36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
kadonotakashi 0:8fdf9a60065b 37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
kadonotakashi 0:8fdf9a60065b 38 * POSSIBILITY OF SUCH DAMAGE.
kadonotakashi 0:8fdf9a60065b 39 *
kadonotakashi 0:8fdf9a60065b 40 * \asf_license_stop
kadonotakashi 0:8fdf9a60065b 41 *
kadonotakashi 0:8fdf9a60065b 42 */
kadonotakashi 0:8fdf9a60065b 43 /*
kadonotakashi 0:8fdf9a60065b 44 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
kadonotakashi 0:8fdf9a60065b 45 */
kadonotakashi 0:8fdf9a60065b 46 #ifndef _cycle_counter_h_
kadonotakashi 0:8fdf9a60065b 47 #define _cycle_counter_h_
kadonotakashi 0:8fdf9a60065b 48
kadonotakashi 0:8fdf9a60065b 49 #ifdef __cplusplus
kadonotakashi 0:8fdf9a60065b 50 extern "C" {
kadonotakashi 0:8fdf9a60065b 51 #endif
kadonotakashi 0:8fdf9a60065b 52
kadonotakashi 0:8fdf9a60065b 53
kadonotakashi 0:8fdf9a60065b 54 #include <compiler.h>
kadonotakashi 0:8fdf9a60065b 55
kadonotakashi 0:8fdf9a60065b 56 /**
kadonotakashi 0:8fdf9a60065b 57 * @name Convenience functions for busy-wait delay loops
kadonotakashi 0:8fdf9a60065b 58 *
kadonotakashi 0:8fdf9a60065b 59 * @def delay_cycles
kadonotakashi 0:8fdf9a60065b 60 * @brief Delay program execution for a specified number of CPU cycles.
kadonotakashi 0:8fdf9a60065b 61 * @param n number of CPU cycles to wait
kadonotakashi 0:8fdf9a60065b 62 *
kadonotakashi 0:8fdf9a60065b 63 * @def cpu_delay_ms
kadonotakashi 0:8fdf9a60065b 64 * @brief Delay program execution for a specified number of milliseconds.
kadonotakashi 0:8fdf9a60065b 65 * @param delay number of milliseconds to wait
kadonotakashi 0:8fdf9a60065b 66 * @param f_cpu CPU frequency in Hertz
kadonotakashi 0:8fdf9a60065b 67 *
kadonotakashi 0:8fdf9a60065b 68 * @def cpu_delay_us
kadonotakashi 0:8fdf9a60065b 69 * @brief Delay program execution for a specified number of microseconds.
kadonotakashi 0:8fdf9a60065b 70 * @param delay number of microseconds to wait
kadonotakashi 0:8fdf9a60065b 71 * @param f_cpu CPU frequency in Hertz
kadonotakashi 0:8fdf9a60065b 72 *
kadonotakashi 0:8fdf9a60065b 73 * @def cpu_ms_2_cy
kadonotakashi 0:8fdf9a60065b 74 * @brief Convert milli-seconds into CPU cycles.
kadonotakashi 0:8fdf9a60065b 75 * @param ms number of milliseconds
kadonotakashi 0:8fdf9a60065b 76 * @param f_cpu CPU frequency in Hertz
kadonotakashi 0:8fdf9a60065b 77 * @return the converted number of CPU cycles
kadonotakashi 0:8fdf9a60065b 78 *
kadonotakashi 0:8fdf9a60065b 79 * @def cpu_us_2_cy
kadonotakashi 0:8fdf9a60065b 80 * @brief Convert micro-seconds into CPU cycles.
kadonotakashi 0:8fdf9a60065b 81 * @param ms number of microseconds
kadonotakashi 0:8fdf9a60065b 82 * @param f_cpu CPU frequency in Hertz
kadonotakashi 0:8fdf9a60065b 83 * @return the converted number of CPU cycles
kadonotakashi 0:8fdf9a60065b 84 *
kadonotakashi 0:8fdf9a60065b 85 * @{
kadonotakashi 0:8fdf9a60065b 86 */
kadonotakashi 0:8fdf9a60065b 87
kadonotakashi 0:8fdf9a60065b 88 /**
kadonotakashi 0:8fdf9a60065b 89 * \brief Delay loop to delay n number of cycles
kadonotakashi 0:8fdf9a60065b 90 *
kadonotakashi 0:8fdf9a60065b 91 * \note The function runs in internal RAM so that flash wait states
kadonotakashi 0:8fdf9a60065b 92 * will not affect the delay time.
kadonotakashi 0:8fdf9a60065b 93 *
kadonotakashi 0:8fdf9a60065b 94 * \param n Number of cycles
kadonotakashi 0:8fdf9a60065b 95 */
kadonotakashi 0:8fdf9a60065b 96 void portable_delay_cycles(unsigned long n);
kadonotakashi 0:8fdf9a60065b 97
kadonotakashi 0:8fdf9a60065b 98 /* Cortex-M7 is faster than Cortex-M3/M4/M0+ */
kadonotakashi 0:8fdf9a60065b 99 #ifdef __CM7_REV
kadonotakashi 0:8fdf9a60065b 100
kadonotakashi 0:8fdf9a60065b 101 # define cpu_ms_2_cy(ms, f_cpu) \
kadonotakashi 0:8fdf9a60065b 102 (((uint64_t)(ms) * (f_cpu) + (uint64_t)(5.932e3 - 1ul)) / (uint64_t)5.932e3)
kadonotakashi 0:8fdf9a60065b 103 # define cpu_us_2_cy(us, f_cpu) \
kadonotakashi 0:8fdf9a60065b 104 (((uint64_t)(us) * (f_cpu) + (uint64_t)(5.932e6 - 1ul)) / (uint64_t)5.932e6)
kadonotakashi 0:8fdf9a60065b 105
kadonotakashi 0:8fdf9a60065b 106 #else
kadonotakashi 0:8fdf9a60065b 107
kadonotakashi 0:8fdf9a60065b 108 # define cpu_ms_2_cy(ms, f_cpu) \
kadonotakashi 0:8fdf9a60065b 109 (((uint64_t)(ms) * (f_cpu) + (uint64_t)(14e3 - 1ul)) / (uint64_t)14e3)
kadonotakashi 0:8fdf9a60065b 110 # define cpu_us_2_cy(us, f_cpu) \
kadonotakashi 0:8fdf9a60065b 111 (((uint64_t)(us) * (f_cpu) + (uint64_t)(14e6 - 1ul)) / (uint64_t)14e6)
kadonotakashi 0:8fdf9a60065b 112
kadonotakashi 0:8fdf9a60065b 113 #endif
kadonotakashi 0:8fdf9a60065b 114
kadonotakashi 0:8fdf9a60065b 115 #define delay_cycles portable_delay_cycles
kadonotakashi 0:8fdf9a60065b 116
kadonotakashi 0:8fdf9a60065b 117 #define cpu_delay_ms(delay, f_cpu) delay_cycles(cpu_ms_2_cy(delay, f_cpu))
kadonotakashi 0:8fdf9a60065b 118 #define cpu_delay_us(delay, f_cpu) delay_cycles(cpu_us_2_cy(delay, f_cpu))
kadonotakashi 0:8fdf9a60065b 119 //! @}
kadonotakashi 0:8fdf9a60065b 120
kadonotakashi 0:8fdf9a60065b 121
kadonotakashi 0:8fdf9a60065b 122 #ifdef __cplusplus
kadonotakashi 0:8fdf9a60065b 123 }
kadonotakashi 0:8fdf9a60065b 124 #endif
kadonotakashi 0:8fdf9a60065b 125
kadonotakashi 0:8fdf9a60065b 126 #endif /* _cycle_counter_h_ */