Василий Басалаев / mbed-I2CIO

Modification of mbed-src library only for STM32F030F4, very cheap microcontroller in 20-Pin TSSOP package, with 16Kbytes of Flash and 4Kbytes of Ram. **Target for online compilator must be Nucleo 32F030R8.** 01.02.2018 Acosinwork: Fork of mbed-STM32F030F4 library. Support for Troyka GPIO expander by Amperka. http://amperka.ru/product/troyka-gpio-expander

Fork of mbed-STM32F030F4 by Nothing Special

common/SPI.cpp@12:6f07dd7cbe47, 2018-02-01 (annotated)

Committer:
acosinwork
Date:
Thu Feb 01 10:37:10 2018 +0000
Revision:
12:6f07dd7cbe47
Parent:
0:38ccae254a29 
Change pin mapping and set internall oscillator as default. Fork to support Troyka GPIO expander (I2C I/O); http://amperka.ru/product/troyka-gpio-expander

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mega64 0:38ccae254a29 1 /* mbed Microcontroller Library
mega64 0:38ccae254a29 2 * Copyright (c) 2006-2013 ARM Limited
mega64 0:38ccae254a29 3 *
mega64 0:38ccae254a29 4 * Licensed under the Apache License, Version 2.0 (the "License");
mega64 0:38ccae254a29 5 * you may not use this file except in compliance with the License.
mega64 0:38ccae254a29 6 * You may obtain a copy of the License at
mega64 0:38ccae254a29 7 *
mega64 0:38ccae254a29 8 * http://www.apache.org/licenses/LICENSE-2.0
mega64 0:38ccae254a29 9 *
mega64 0:38ccae254a29 10 * Unless required by applicable law or agreed to in writing, software
mega64 0:38ccae254a29 11 * distributed under the License is distributed on an "AS IS" BASIS,
mega64 0:38ccae254a29 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mega64 0:38ccae254a29 13 * See the License for the specific language governing permissions and
mega64 0:38ccae254a29 14 * limitations under the License.
mega64 0:38ccae254a29 15 */
mega64 0:38ccae254a29 16 #include "SPI.h"
mega64 0:38ccae254a29 17
mega64 0:38ccae254a29 18 #if DEVICE_SPI
mega64 0:38ccae254a29 19
mega64 0:38ccae254a29 20 namespace mbed {
mega64 0:38ccae254a29 21
mega64 0:38ccae254a29 22 SPI::SPI(PinName mosi, PinName miso, PinName sclk, PinName _unused) :
mega64 0:38ccae254a29 23 _spi(),
mega64 0:38ccae254a29 24 _bits(8),
mega64 0:38ccae254a29 25 _mode(0),
mega64 0:38ccae254a29 26 _hz(1000000) {
mega64 0:38ccae254a29 27 spi_init(&_spi, mosi, miso, sclk, NC);
mega64 0:38ccae254a29 28 spi_format(&_spi, _bits, _mode, 0);
mega64 0:38ccae254a29 29 spi_frequency(&_spi, _hz);
mega64 0:38ccae254a29 30 }
mega64 0:38ccae254a29 31
mega64 0:38ccae254a29 32 void SPI::format(int bits, int mode) {
mega64 0:38ccae254a29 33 _bits = bits;
mega64 0:38ccae254a29 34 _mode = mode;
mega64 0:38ccae254a29 35 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
mega64 0:38ccae254a29 36 aquire();
mega64 0:38ccae254a29 37 }
mega64 0:38ccae254a29 38
mega64 0:38ccae254a29 39 void SPI::frequency(int hz) {
mega64 0:38ccae254a29 40 _hz = hz;
mega64 0:38ccae254a29 41 SPI::_owner = NULL; // Not that elegant, but works. rmeyer
mega64 0:38ccae254a29 42 aquire();
mega64 0:38ccae254a29 43 }
mega64 0:38ccae254a29 44
mega64 0:38ccae254a29 45 SPI* SPI::_owner = NULL;
mega64 0:38ccae254a29 46
mega64 0:38ccae254a29 47 // ignore the fact there are multiple physical spis, and always update if it wasnt us last
mega64 0:38ccae254a29 48 void SPI::aquire() {
mega64 0:38ccae254a29 49 if (_owner != this) {
mega64 0:38ccae254a29 50 spi_format(&_spi, _bits, _mode, 0);
mega64 0:38ccae254a29 51 spi_frequency(&_spi, _hz);
mega64 0:38ccae254a29 52 _owner = this;
mega64 0:38ccae254a29 53 }
mega64 0:38ccae254a29 54 }
mega64 0:38ccae254a29 55
mega64 0:38ccae254a29 56 int SPI::write(int value) {
mega64 0:38ccae254a29 57 aquire();
mega64 0:38ccae254a29 58 return spi_master_write(&_spi, value);
mega64 0:38ccae254a29 59 }
mega64 0:38ccae254a29 60
mega64 0:38ccae254a29 61 } // namespace mbed
mega64 0:38ccae254a29 62
mega64 0:38ccae254a29 63 #endif