Milen Pavlov / XRange_mbed_src

Mbed SDK for XRange SX1272 LoRa module

Dependents:   XRangePingPong XRange-LoRaWAN-lmic-app lora-transceiver

SX1272 LoRa RF module

https://www.netblocks.eu/xrange-sx1272-lora-datasheet/

api/AnalogOut.h@339:ac6f3fd999f3, 2016-01-07 (annotated)

Committer:
netblocks
Date:
Thu Jan 07 13:01:25 2016 +0000
Revision:
339:ac6f3fd999f3
Parent:
336:1e18a06a987b 
HSE_VALUE set for XTAL 16Mhz

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dudmuck 336:1e18a06a987b 1 /* mbed Microcontroller Library
dudmuck 336:1e18a06a987b 2 * Copyright (c) 2006-2013 ARM Limited
dudmuck 336:1e18a06a987b 3 *
dudmuck 336:1e18a06a987b 4 * Licensed under the Apache License, Version 2.0 (the "License");
dudmuck 336:1e18a06a987b 5 * you may not use this file except in compliance with the License.
dudmuck 336:1e18a06a987b 6 * You may obtain a copy of the License at
dudmuck 336:1e18a06a987b 7 *
dudmuck 336:1e18a06a987b 8 * http://www.apache.org/licenses/LICENSE-2.0
dudmuck 336:1e18a06a987b 9 *
dudmuck 336:1e18a06a987b 10 * Unless required by applicable law or agreed to in writing, software
dudmuck 336:1e18a06a987b 11 * distributed under the License is distributed on an "AS IS" BASIS,
dudmuck 336:1e18a06a987b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dudmuck 336:1e18a06a987b 13 * See the License for the specific language governing permissions and
dudmuck 336:1e18a06a987b 14 * limitations under the License.
dudmuck 336:1e18a06a987b 15 */
dudmuck 336:1e18a06a987b 16 #ifndef MBED_ANALOGOUT_H
dudmuck 336:1e18a06a987b 17 #define MBED_ANALOGOUT_H
dudmuck 336:1e18a06a987b 18
dudmuck 336:1e18a06a987b 19 #include "platform.h"
dudmuck 336:1e18a06a987b 20
dudmuck 336:1e18a06a987b 21 #if DEVICE_ANALOGOUT
dudmuck 336:1e18a06a987b 22
dudmuck 336:1e18a06a987b 23 #include "analogout_api.h"
dudmuck 336:1e18a06a987b 24
dudmuck 336:1e18a06a987b 25 namespace mbed {
dudmuck 336:1e18a06a987b 26
dudmuck 336:1e18a06a987b 27 /** An analog output, used for setting the voltage on a pin
dudmuck 336:1e18a06a987b 28 *
dudmuck 336:1e18a06a987b 29 * Example:
dudmuck 336:1e18a06a987b 30 * @code
dudmuck 336:1e18a06a987b 31 * // Make a sawtooth output
dudmuck 336:1e18a06a987b 32 *
dudmuck 336:1e18a06a987b 33 * #include "mbed.h"
dudmuck 336:1e18a06a987b 34 *
dudmuck 336:1e18a06a987b 35 * AnalogOut tri(p18);
dudmuck 336:1e18a06a987b 36 * int main() {
dudmuck 336:1e18a06a987b 37 * while(1) {
dudmuck 336:1e18a06a987b 38 * tri = tri + 0.01;
dudmuck 336:1e18a06a987b 39 * wait_us(1);
dudmuck 336:1e18a06a987b 40 * if(tri == 1) {
dudmuck 336:1e18a06a987b 41 * tri = 0;
dudmuck 336:1e18a06a987b 42 * }
dudmuck 336:1e18a06a987b 43 * }
dudmuck 336:1e18a06a987b 44 * }
dudmuck 336:1e18a06a987b 45 * @endcode
dudmuck 336:1e18a06a987b 46 */
dudmuck 336:1e18a06a987b 47 class AnalogOut {
dudmuck 336:1e18a06a987b 48
dudmuck 336:1e18a06a987b 49 public:
dudmuck 336:1e18a06a987b 50
dudmuck 336:1e18a06a987b 51 /** Create an AnalogOut connected to the specified pin
dudmuck 336:1e18a06a987b 52 *
dudmuck 336:1e18a06a987b 53 * @param AnalogOut pin to connect to (18)
dudmuck 336:1e18a06a987b 54 */
dudmuck 336:1e18a06a987b 55 AnalogOut(PinName pin) {
dudmuck 336:1e18a06a987b 56 analogout_init(&_dac, pin);
dudmuck 336:1e18a06a987b 57 }
dudmuck 336:1e18a06a987b 58
dudmuck 336:1e18a06a987b 59 /** Set the output voltage, specified as a percentage (float)
dudmuck 336:1e18a06a987b 60 *
dudmuck 336:1e18a06a987b 61 * @param value A floating-point value representing the output voltage,
dudmuck 336:1e18a06a987b 62 * specified as a percentage. The value should lie between
dudmuck 336:1e18a06a987b 63 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
dudmuck 336:1e18a06a987b 64 * Values outside this range will be saturated to 0.0f or 1.0f.
dudmuck 336:1e18a06a987b 65 */
dudmuck 336:1e18a06a987b 66 void write(float value) {
dudmuck 336:1e18a06a987b 67 analogout_write(&_dac, value);
dudmuck 336:1e18a06a987b 68 }
dudmuck 336:1e18a06a987b 69
dudmuck 336:1e18a06a987b 70 /** Set the output voltage, represented as an unsigned short in the range [0x0, 0xFFFF]
dudmuck 336:1e18a06a987b 71 *
dudmuck 336:1e18a06a987b 72 * @param value 16-bit unsigned short representing the output voltage,
dudmuck 336:1e18a06a987b 73 * normalised to a 16-bit value (0x0000 = 0v, 0xFFFF = 3.3v)
dudmuck 336:1e18a06a987b 74 */
dudmuck 336:1e18a06a987b 75 void write_u16(unsigned short value) {
dudmuck 336:1e18a06a987b 76 analogout_write_u16(&_dac, value);
dudmuck 336:1e18a06a987b 77 }
dudmuck 336:1e18a06a987b 78
dudmuck 336:1e18a06a987b 79 /** Return the current output voltage setting, measured as a percentage (float)
dudmuck 336:1e18a06a987b 80 *
dudmuck 336:1e18a06a987b 81 * @returns
dudmuck 336:1e18a06a987b 82 * A floating-point value representing the current voltage being output on the pin,
dudmuck 336:1e18a06a987b 83 * measured as a percentage. The returned value will lie between
dudmuck 336:1e18a06a987b 84 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
dudmuck 336:1e18a06a987b 85 *
dudmuck 336:1e18a06a987b 86 * @note
dudmuck 336:1e18a06a987b 87 * This value may not match exactly the value set by a previous write().
dudmuck 336:1e18a06a987b 88 */
dudmuck 336:1e18a06a987b 89 float read() {
dudmuck 336:1e18a06a987b 90 return analogout_read(&_dac);
dudmuck 336:1e18a06a987b 91 }
dudmuck 336:1e18a06a987b 92
dudmuck 336:1e18a06a987b 93 #ifdef MBED_OPERATORS
dudmuck 336:1e18a06a987b 94 /** An operator shorthand for write()
dudmuck 336:1e18a06a987b 95 */
dudmuck 336:1e18a06a987b 96 AnalogOut& operator= (float percent) {
dudmuck 336:1e18a06a987b 97 write(percent);
dudmuck 336:1e18a06a987b 98 return *this;
dudmuck 336:1e18a06a987b 99 }
dudmuck 336:1e18a06a987b 100
dudmuck 336:1e18a06a987b 101 AnalogOut& operator= (AnalogOut& rhs) {
dudmuck 336:1e18a06a987b 102 write(rhs.read());
dudmuck 336:1e18a06a987b 103 return *this;
dudmuck 336:1e18a06a987b 104 }
dudmuck 336:1e18a06a987b 105
dudmuck 336:1e18a06a987b 106 /** An operator shorthand for read()
dudmuck 336:1e18a06a987b 107 */
dudmuck 336:1e18a06a987b 108 operator float() {
dudmuck 336:1e18a06a987b 109 return read();
dudmuck 336:1e18a06a987b 110 }
dudmuck 336:1e18a06a987b 111 #endif
dudmuck 336:1e18a06a987b 112
dudmuck 336:1e18a06a987b 113 protected:
dudmuck 336:1e18a06a987b 114 dac_t _dac;
dudmuck 336:1e18a06a987b 115 };
dudmuck 336:1e18a06a987b 116
dudmuck 336:1e18a06a987b 117 } // namespace mbed
dudmuck 336:1e18a06a987b 118
dudmuck 336:1e18a06a987b 119 #endif
dudmuck 336:1e18a06a987b 120
dudmuck 336:1e18a06a987b 121 #endif