Yihui Xiong / nrf51822_fix_i2c_spi_conflict

fix nrf51822 i2c & spi conflict

Dependencies:   BLE_API eMPL_MPU6050 nRF51822

Fork of Seeed_Tiny_BLE_Flash by Darren Huang

mbed-src/api/PwmOut.h@5:b8c02645e6af, 2015-11-17 (annotated)

Committer:
yihui
Date:
Tue Nov 17 07:48:56 2015 +0000
Revision:
5:b8c02645e6af
fix i2c & spi conflict

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 5:b8c02645e6af 1 /* mbed Microcontroller Library
yihui 5:b8c02645e6af 2 * Copyright (c) 2006-2013 ARM Limited
yihui 5:b8c02645e6af 3 *
yihui 5:b8c02645e6af 4 * Licensed under the Apache License, Version 2.0 (the "License");
yihui 5:b8c02645e6af 5 * you may not use this file except in compliance with the License.
yihui 5:b8c02645e6af 6 * You may obtain a copy of the License at
yihui 5:b8c02645e6af 7 *
yihui 5:b8c02645e6af 8 * http://www.apache.org/licenses/LICENSE-2.0
yihui 5:b8c02645e6af 9 *
yihui 5:b8c02645e6af 10 * Unless required by applicable law or agreed to in writing, software
yihui 5:b8c02645e6af 11 * distributed under the License is distributed on an "AS IS" BASIS,
yihui 5:b8c02645e6af 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
yihui 5:b8c02645e6af 13 * See the License for the specific language governing permissions and
yihui 5:b8c02645e6af 14 * limitations under the License.
yihui 5:b8c02645e6af 15 */
yihui 5:b8c02645e6af 16 #ifndef MBED_PWMOUT_H
yihui 5:b8c02645e6af 17 #define MBED_PWMOUT_H
yihui 5:b8c02645e6af 18
yihui 5:b8c02645e6af 19 #include "platform.h"
yihui 5:b8c02645e6af 20
yihui 5:b8c02645e6af 21 #if DEVICE_PWMOUT
yihui 5:b8c02645e6af 22 #include "pwmout_api.h"
yihui 5:b8c02645e6af 23
yihui 5:b8c02645e6af 24 namespace mbed {
yihui 5:b8c02645e6af 25
yihui 5:b8c02645e6af 26 /** A pulse-width modulation digital output
yihui 5:b8c02645e6af 27 *
yihui 5:b8c02645e6af 28 * Example
yihui 5:b8c02645e6af 29 * @code
yihui 5:b8c02645e6af 30 * // Fade a led on.
yihui 5:b8c02645e6af 31 * #include "mbed.h"
yihui 5:b8c02645e6af 32 *
yihui 5:b8c02645e6af 33 * PwmOut led(LED1);
yihui 5:b8c02645e6af 34 *
yihui 5:b8c02645e6af 35 * int main() {
yihui 5:b8c02645e6af 36 * while(1) {
yihui 5:b8c02645e6af 37 * led = led + 0.01;
yihui 5:b8c02645e6af 38 * wait(0.2);
yihui 5:b8c02645e6af 39 * if(led == 1.0) {
yihui 5:b8c02645e6af 40 * led = 0;
yihui 5:b8c02645e6af 41 * }
yihui 5:b8c02645e6af 42 * }
yihui 5:b8c02645e6af 43 * }
yihui 5:b8c02645e6af 44 * @endcode
yihui 5:b8c02645e6af 45 *
yihui 5:b8c02645e6af 46 * @note
yihui 5:b8c02645e6af 47 * On the LPC1768 and LPC2368, the PWMs all share the same
yihui 5:b8c02645e6af 48 * period - if you change the period for one, you change it for all.
yihui 5:b8c02645e6af 49 * Although routines that change the period maintain the duty cycle
yihui 5:b8c02645e6af 50 * for its PWM, all other PWMs will require their duty cycle to be
yihui 5:b8c02645e6af 51 * refreshed.
yihui 5:b8c02645e6af 52 */
yihui 5:b8c02645e6af 53 class PwmOut {
yihui 5:b8c02645e6af 54
yihui 5:b8c02645e6af 55 public:
yihui 5:b8c02645e6af 56
yihui 5:b8c02645e6af 57 /** Create a PwmOut connected to the specified pin
yihui 5:b8c02645e6af 58 *
yihui 5:b8c02645e6af 59 * @param pin PwmOut pin to connect to
yihui 5:b8c02645e6af 60 */
yihui 5:b8c02645e6af 61 PwmOut(PinName pin) {
yihui 5:b8c02645e6af 62 pwmout_init(&_pwm, pin);
yihui 5:b8c02645e6af 63 }
yihui 5:b8c02645e6af 64
yihui 5:b8c02645e6af 65 /** Set the ouput duty-cycle, specified as a percentage (float)
yihui 5:b8c02645e6af 66 *
yihui 5:b8c02645e6af 67 * @param value A floating-point value representing the output duty-cycle,
yihui 5:b8c02645e6af 68 * specified as a percentage. The value should lie between
yihui 5:b8c02645e6af 69 * 0.0f (representing on 0%) and 1.0f (representing on 100%).
yihui 5:b8c02645e6af 70 * Values outside this range will be saturated to 0.0f or 1.0f.
yihui 5:b8c02645e6af 71 */
yihui 5:b8c02645e6af 72 void write(float value) {
yihui 5:b8c02645e6af 73 pwmout_write(&_pwm, value);
yihui 5:b8c02645e6af 74 }
yihui 5:b8c02645e6af 75
yihui 5:b8c02645e6af 76 /** Return the current output duty-cycle setting, measured as a percentage (float)
yihui 5:b8c02645e6af 77 *
yihui 5:b8c02645e6af 78 * @returns
yihui 5:b8c02645e6af 79 * A floating-point value representing the current duty-cycle being output on the pin,
yihui 5:b8c02645e6af 80 * measured as a percentage. The returned value will lie between
yihui 5:b8c02645e6af 81 * 0.0f (representing on 0%) and 1.0f (representing on 100%).
yihui 5:b8c02645e6af 82 *
yihui 5:b8c02645e6af 83 * @note
yihui 5:b8c02645e6af 84 * This value may not match exactly the value set by a previous <write>.
yihui 5:b8c02645e6af 85 */
yihui 5:b8c02645e6af 86 float read() {
yihui 5:b8c02645e6af 87 return pwmout_read(&_pwm);
yihui 5:b8c02645e6af 88 }
yihui 5:b8c02645e6af 89
yihui 5:b8c02645e6af 90 /** Set the PWM period, specified in seconds (float), keeping the duty cycle the same.
yihui 5:b8c02645e6af 91 *
yihui 5:b8c02645e6af 92 * @note
yihui 5:b8c02645e6af 93 * The resolution is currently in microseconds; periods smaller than this
yihui 5:b8c02645e6af 94 * will be set to zero.
yihui 5:b8c02645e6af 95 */
yihui 5:b8c02645e6af 96 void period(float seconds) {
yihui 5:b8c02645e6af 97 pwmout_period(&_pwm, seconds);
yihui 5:b8c02645e6af 98 }
yihui 5:b8c02645e6af 99
yihui 5:b8c02645e6af 100 /** Set the PWM period, specified in milli-seconds (int), keeping the duty cycle the same.
yihui 5:b8c02645e6af 101 */
yihui 5:b8c02645e6af 102 void period_ms(int ms) {
yihui 5:b8c02645e6af 103 pwmout_period_ms(&_pwm, ms);
yihui 5:b8c02645e6af 104 }
yihui 5:b8c02645e6af 105
yihui 5:b8c02645e6af 106 /** Set the PWM period, specified in micro-seconds (int), keeping the duty cycle the same.
yihui 5:b8c02645e6af 107 */
yihui 5:b8c02645e6af 108 void period_us(int us) {
yihui 5:b8c02645e6af 109 pwmout_period_us(&_pwm, us);
yihui 5:b8c02645e6af 110 }
yihui 5:b8c02645e6af 111
yihui 5:b8c02645e6af 112 /** Set the PWM pulsewidth, specified in seconds (float), keeping the period the same.
yihui 5:b8c02645e6af 113 */
yihui 5:b8c02645e6af 114 void pulsewidth(float seconds) {
yihui 5:b8c02645e6af 115 pwmout_pulsewidth(&_pwm, seconds);
yihui 5:b8c02645e6af 116 }
yihui 5:b8c02645e6af 117
yihui 5:b8c02645e6af 118 /** Set the PWM pulsewidth, specified in milli-seconds (int), keeping the period the same.
yihui 5:b8c02645e6af 119 */
yihui 5:b8c02645e6af 120 void pulsewidth_ms(int ms) {
yihui 5:b8c02645e6af 121 pwmout_pulsewidth_ms(&_pwm, ms);
yihui 5:b8c02645e6af 122 }
yihui 5:b8c02645e6af 123
yihui 5:b8c02645e6af 124 /** Set the PWM pulsewidth, specified in micro-seconds (int), keeping the period the same.
yihui 5:b8c02645e6af 125 */
yihui 5:b8c02645e6af 126 void pulsewidth_us(int us) {
yihui 5:b8c02645e6af 127 pwmout_pulsewidth_us(&_pwm, us);
yihui 5:b8c02645e6af 128 }
yihui 5:b8c02645e6af 129
yihui 5:b8c02645e6af 130 #ifdef MBED_OPERATORS
yihui 5:b8c02645e6af 131 /** A operator shorthand for write()
yihui 5:b8c02645e6af 132 */
yihui 5:b8c02645e6af 133 PwmOut& operator= (float value) {
yihui 5:b8c02645e6af 134 write(value);
yihui 5:b8c02645e6af 135 return *this;
yihui 5:b8c02645e6af 136 }
yihui 5:b8c02645e6af 137
yihui 5:b8c02645e6af 138 PwmOut& operator= (PwmOut& rhs) {
yihui 5:b8c02645e6af 139 write(rhs.read());
yihui 5:b8c02645e6af 140 return *this;
yihui 5:b8c02645e6af 141 }
yihui 5:b8c02645e6af 142
yihui 5:b8c02645e6af 143 /** An operator shorthand for read()
yihui 5:b8c02645e6af 144 */
yihui 5:b8c02645e6af 145 operator float() {
yihui 5:b8c02645e6af 146 return read();
yihui 5:b8c02645e6af 147 }
yihui 5:b8c02645e6af 148 #endif
yihui 5:b8c02645e6af 149
yihui 5:b8c02645e6af 150 protected:
yihui 5:b8c02645e6af 151 pwmout_t _pwm;
yihui 5:b8c02645e6af 152 };
yihui 5:b8c02645e6af 153
yihui 5:b8c02645e6af 154 } // namespace mbed
yihui 5:b8c02645e6af 155
yihui 5:b8c02645e6af 156 #endif
yihui 5:b8c02645e6af 157
yihui 5:b8c02645e6af 158 #endif