d71254f8f9
Add a spi_private.h with a SPI_DEV(), for convenience. Use it in the F1 and F2 implementations. We could probably unify these with an STM32_HAVE_SPI(n) macro, but we'll leave that for the future. Most everything from F1 is portable; F2 has some additional bit definitions and a spi_get_af() routine, but that's about it. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/******************************************************************************
|
|
* 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;
|
|
}
|
|
}
|