91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/******************************************************************************
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* The MIT License
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*
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* Copyright (c) 2011, 2012 LeafLabs, LLC.
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* Copyright (c) 2010 Perry Hung.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*****************************************************************************/
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/**
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* @file libmaple/stm32f1/spi.c
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* @author Marti Bolivar <mbolivar@leaflabs.com>
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* @brief STM32F1 SPI/I2S.
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*/
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#include <libmaple/spi.h>
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#include <libmaple/gpio.h>
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#include "spi_private.h"
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/*
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* Devices
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*/
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static spi_dev spi1 = SPI_DEV(1);
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static spi_dev spi2 = SPI_DEV(2);
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spi_dev *SPI1 = &spi1;
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spi_dev *SPI2 = &spi2;
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#if defined(STM32_HIGH_DENSITY) || defined(STM32_XL_DENSITY)
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static spi_dev spi3 = SPI_DEV(3);
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spi_dev *SPI3 = &spi3;
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#endif
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/*
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* Routines
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*/
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void spi_config_gpios(spi_dev *dev,
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uint8 as_master,
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uint8 nss_pin,
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uint8 sck_pin,
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uint8 miso_pin,
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uint8 mosi_pin) {
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if (as_master) {
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gpio_set_mode(sck_pin, GPIO_AF_OUTPUT_PP);
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gpio_set_mode(miso_pin, GPIO_AF_INPUT_PD);
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gpio_set_mode(mosi_pin, GPIO_AF_OUTPUT_PP);
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} else {
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gpio_set_mode(nss_pin, GPIO_INPUT_FLOATING);
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gpio_set_mode(sck_pin, GPIO_INPUT_FLOATING);
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gpio_set_mode(miso_pin, GPIO_AF_OUTPUT_PP);
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gpio_set_mode(mosi_pin, GPIO_INPUT_FLOATING);
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}
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uint8_t af_mode = 6;
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if(dev->clk_id <= RCC_SPI2) { af_mode = 5; }
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if(!as_master) {
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gpio_set_af_mode(nss_pin, af_mode);
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}
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gpio_set_af_mode(sck_pin, af_mode);
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gpio_set_af_mode(miso_pin, af_mode);
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gpio_set_af_mode(mosi_pin, af_mode);
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}
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void spi_foreach(void (*fn)(spi_dev*)) {
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fn(SPI1);
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fn(SPI2);
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#if defined(STM32_HIGH_DENSITY) || defined(STM32_XL_DENSITY)
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fn(SPI3);
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#endif
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}
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