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/

common/SPI.cpp@336:1e18a06a987b, 2015-01-15 (annotated)

Committer:
dudmuck
Date:
Thu Jan 15 02:25:40 2015 +0000
Revision:
336:1e18a06a987b
updated to rev443 of official mbed-src

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 #include "SPI.h"
dudmuck 336:1e18a06a987b 17
dudmuck 336:1e18a06a987b 18 #if DEVICE_SPI
dudmuck 336:1e18a06a987b 19
dudmuck 336:1e18a06a987b 20 namespace mbed {
dudmuck 336:1e18a06a987b 21
dudmuck 336:1e18a06a987b 22 SPI::SPI(PinName mosi, PinName miso, PinName sclk, PinName _unused) :
dudmuck 336:1e18a06a987b 23 _spi(),
dudmuck 336:1e18a06a987b 24 _bits(8),
dudmuck 336:1e18a06a987b 25 _mode(0),
dudmuck 336:1e18a06a987b 26 _hz(1000000) {
dudmuck 336:1e18a06a987b 27 spi_init(&_spi, mosi, miso, sclk, NC);
dudmuck 336:1e18a06a987b 28 spi_format(&_spi, _bits, _mode, 0);
dudmuck 336:1e18a06a987b 29 spi_frequency(&_spi, _hz);
dudmuck 336:1e18a06a987b 30 }
dudmuck 336:1e18a06a987b 31
dudmuck 336:1e18a06a987b 32 void SPI::format(int bits, int mode) {
dudmuck 336:1e18a06a987b 33 _bits = bits;
dudmuck 336:1e18a06a987b 34 _mode = mode;
dudmuck 336:1e18a06a987b 35 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
dudmuck 336:1e18a06a987b 36 aquire();
dudmuck 336:1e18a06a987b 37 }
dudmuck 336:1e18a06a987b 38
dudmuck 336:1e18a06a987b 39 void SPI::frequency(int hz) {
dudmuck 336:1e18a06a987b 40 _hz = hz;
dudmuck 336:1e18a06a987b 41 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
dudmuck 336:1e18a06a987b 42 aquire();
dudmuck 336:1e18a06a987b 43 }
dudmuck 336:1e18a06a987b 44
dudmuck 336:1e18a06a987b 45 SPI* SPI::_owner = NULL;
dudmuck 336:1e18a06a987b 46
dudmuck 336:1e18a06a987b 47 // ignore the fact there are multiple physical spis, and always update if it wasnt us last
dudmuck 336:1e18a06a987b 48 void SPI::aquire() {
dudmuck 336:1e18a06a987b 49 if (_owner != this) {
dudmuck 336:1e18a06a987b 50 spi_format(&_spi, _bits, _mode, 0);
dudmuck 336:1e18a06a987b 51 spi_frequency(&_spi, _hz);
dudmuck 336:1e18a06a987b 52 _owner = this;
dudmuck 336:1e18a06a987b 53 }
dudmuck 336:1e18a06a987b 54 }
dudmuck 336:1e18a06a987b 55
dudmuck 336:1e18a06a987b 56 int SPI::write(int value) {
dudmuck 336:1e18a06a987b 57 aquire();
dudmuck 336:1e18a06a987b 58 return spi_master_write(&_spi, value);
dudmuck 336:1e18a06a987b 59 }
dudmuck 336:1e18a06a987b 60
dudmuck 336:1e18a06a987b 61 } // namespace mbed
dudmuck 336:1e18a06a987b 62
dudmuck 336:1e18a06a987b 63 #endif