1 // Copyright 2013 Emilie Gillet.
2 //
3 // Author: Emilie Gillet (emilie.o.gillet@gmail.com)
4 //
5 // Permission is hereby granted, free of charge, to any person obtaining a copy
6 // of this software and associated documentation files (the "Software"), to deal
7 // in the Software without restriction, including without limitation the rights
8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 // copies of the Software, and to permit persons to whom the Software is
10 // furnished to do so, subject to the following conditions:
11 //
12 // The above copyright notice and this permission notice shall be included in
13 // all copies or substantial portions of the Software.
14 //
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21 // THE SOFTWARE.
22 //
23 // See http://creativecommons.org/licenses/MIT/ for more information.
24 //
25 // -----------------------------------------------------------------------------
26 //
27 // Driver for DAC.
28
29 #include "streams/drivers/dac.h"
30
31 namespace streams {
32
Init()33 void Dac::Init() {
34 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
35 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
36 RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
37
38 // Initialize SS pin.
39 GPIO_InitTypeDef gpio_init;
40 gpio_init.GPIO_Pin = kPinSS;
41 gpio_init.GPIO_Speed = GPIO_Speed_50MHz;
42 gpio_init.GPIO_Mode = GPIO_Mode_Out_PP;
43 GPIO_Init(GPIOB, &gpio_init);
44
45 // Initialize MOSI and SCK pins.
46 gpio_init.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_15;
47 gpio_init.GPIO_Speed = GPIO_Speed_50MHz;
48 gpio_init.GPIO_Mode = GPIO_Mode_AF_PP;
49 GPIO_Init(GPIOB, &gpio_init);
50
51 // Initialize SPI
52 SPI_InitTypeDef spi_init;
53 spi_init.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
54 spi_init.SPI_Mode = SPI_Mode_Master;
55 spi_init.SPI_DataSize = SPI_DataSize_16b;
56 spi_init.SPI_CPOL = SPI_CPOL_High;
57 spi_init.SPI_CPHA = SPI_CPHA_1Edge;
58 spi_init.SPI_NSS = SPI_NSS_Soft;
59 spi_init.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
60 spi_init.SPI_FirstBit = SPI_FirstBit_MSB;
61 spi_init.SPI_CRCPolynomial = 7;
62 SPI_Init(SPI2, &spi_init);
63 SPI_Cmd(SPI2, ENABLE);
64 }
65
66 } // namespace streams
67