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/******************************************************************************
* The MIT License
*
* Copyright (c) 2012 LeafLabs, LLC.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*****************************************************************************/
/**
* @file libmaple/stm32f2/spi.c
* @author Marti Bolivar <mbolivar@leaflabs.com>
* @brief STM32F2 SPI/I2S.
*/
#include <libmaple/spi.h>
#include "spi_private.h"
/*
* Devices
*/
static spi_dev spi1 = SPI_DEV(1);
static spi_dev spi2 = SPI_DEV(2);
static spi_dev spi3 = SPI_DEV(3);
spi_dev *SPI1 = &spi1;
spi_dev *SPI2 = &spi2;
spi_dev *SPI3 = &spi3;
/*
* Routines
*/
void spi_config_gpios(spi_dev *dev,
uint8 as_master,
gpio_dev *nss_dev,
uint8 nss_bit,
gpio_dev *comm_dev,
uint8 sck_bit,
uint8 miso_bit,
uint8 mosi_bit) {
gpio_af dev_af = spi_get_af(dev);
gpio_set_mode(nss_dev, nss_bit, GPIO_MODE_AF);
gpio_set_mode(comm_dev, sck_bit, GPIO_MODE_AF);
gpio_set_mode(comm_dev, miso_bit, GPIO_MODE_AF);
gpio_set_mode(comm_dev, mosi_bit, GPIO_MODE_AF);
gpio_set_af(nss_dev, nss_bit, dev_af);
gpio_set_af(comm_dev, sck_bit, dev_af);
gpio_set_af(comm_dev, miso_bit, dev_af);
gpio_set_af(comm_dev, mosi_bit, dev_af);
}
void spi_foreach(void (*fn)(spi_dev*)) {
fn(SPI1);
fn(SPI2);
fn(SPI3);
}
gpio_af spi_get_af(spi_dev *dev) {
switch (dev->clk_id) {
case RCC_SPI1: /* Fall through */
case RCC_SPI2:
return GPIO_AF_SPI_1_2;
case RCC_SPI3:
return GPIO_AF_SPI3;
default:
ASSERT(0); /* Can't happen */
return (gpio_af)-1;
}
}
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