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/******************************************************************************
* The MIT License
*
* Copyright (c) 2011, 2012 LeafLabs, LLC.
* Copyright (c) 2010 Perry Hung.
*
* 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/stm32f1/spi.c
* @author Marti Bolivar <mbolivar@leaflabs.com>
* @brief STM32F1 SPI/I2S.
*/
#include <libmaple/spi.h>
#include <libmaple/gpio.h>
/*
* Devices
*/
static spi_dev spi1 = {
.regs = SPI1_BASE,
.clk_id = RCC_SPI1,
.irq_num = NVIC_SPI1,
};
static spi_dev spi2 = {
.regs = SPI2_BASE,
.clk_id = RCC_SPI2,
.irq_num = NVIC_SPI2,
};
#if defined(STM32_HIGH_DENSITY) || defined(STM32_XL_DENSITY)
static spi_dev spi3 = {
.regs = SPI3_BASE,
.clk_id = RCC_SPI3,
.irq_num = NVIC_SPI3,
};
#endif
/** SPI device 1 */
spi_dev *SPI1 = &spi1;
/** SPI device 2 */
spi_dev *SPI2 = &spi2;
#if defined(STM32_HIGH_DENSITY) || defined(STM32_XL_DENSITY)
/** SPI device 3 */
spi_dev *SPI3 = &spi3;
#endif
/*
* Routines
*/
void spi_config_gpios(spi_dev *ignored,
uint8 as_master,
gpio_dev *nss_dev,
uint8 nss_bit,
gpio_dev *comm_dev,
uint8 sck_bit,
uint8 miso_bit,
uint8 mosi_bit) {
if (as_master) {
gpio_set_mode(nss_dev, nss_bit, GPIO_AF_OUTPUT_PP);
gpio_set_mode(comm_dev, sck_bit, GPIO_AF_OUTPUT_PP);
gpio_set_mode(comm_dev, miso_bit, GPIO_INPUT_FLOATING);
gpio_set_mode(comm_dev, mosi_bit, GPIO_AF_OUTPUT_PP);
} else {
gpio_set_mode(nss_dev, nss_bit, GPIO_INPUT_FLOATING);
gpio_set_mode(comm_dev, sck_bit, GPIO_INPUT_FLOATING);
gpio_set_mode(comm_dev, miso_bit, GPIO_AF_OUTPUT_PP);
gpio_set_mode(comm_dev, mosi_bit, GPIO_INPUT_FLOATING);
}
}
void spi_foreach(void (*fn)(spi_dev*)) {
fn(SPI1);
fn(SPI2);
#if defined(STM32_HIGH_DENSITY) || defined(STM32_XL_DENSITY)
fn(SPI3);
#endif
}
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