diff options
Diffstat (limited to 'libmaple/stm32f2')
| -rw-r--r-- | libmaple/stm32f2/include/series/spi.h | 88 | ||||
| -rw-r--r-- | libmaple/stm32f2/rules.mk | 1 | ||||
| -rw-r--r-- | libmaple/stm32f2/spi.c | 88 |
3 files changed, 177 insertions, 0 deletions
diff --git a/libmaple/stm32f2/include/series/spi.h b/libmaple/stm32f2/include/series/spi.h new file mode 100644 index 0000000..7b9f94a --- /dev/null +++ b/libmaple/stm32f2/include/series/spi.h @@ -0,0 +1,88 @@ +/****************************************************************************** + * 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/include/series/spi.h + * @author Marti Bolivar <mbolivar@leaflabs.com> + * @brief STM32F2 SPI/I2S series header. + */ + +#ifndef _LIBMAPLE_STM32F2_SPI_H_ +#define _LIBMAPLE_STM32F2_SPI_H_ + +#include <libmaple/gpio.h> /* for gpio_af */ + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Register map base pointers + */ + +struct spi_reg_map; + +#define SPI1_BASE ((struct spi_reg_map*)0x40013000) +#define SPI2_BASE ((struct spi_reg_map*)0x40003800) +#define SPI3_BASE ((struct spi_reg_map*)0x40003C00) + +/* + * Register bit definitions + */ + +/* Control register 2 */ + +#define SPI_CR2_FRF_BIT 4 + +#define SPI_CR2_FRF (1U << SPI_CR2_FRF_BIT) + +/* Status register */ + +#define SPI_SR_TIFRFE_BIT 8 + +#define SPI_SR_TIFRFE (1U << SPI_SR_TIFRFE_BIT) + +/* + * Device pointers + */ + +struct spi_dev; + +extern struct spi_dev *SPI1; +extern struct spi_dev *SPI2; +extern struct spi_dev *SPI3; + +/* + * Routines + */ + +gpio_af spi_get_af(struct spi_dev *dev); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/libmaple/stm32f2/rules.mk b/libmaple/stm32f2/rules.mk index fd6b933..759f905 100644 --- a/libmaple/stm32f2/rules.mk +++ b/libmaple/stm32f2/rules.mk @@ -16,6 +16,7 @@ cSRCS_$(d) += exti.c cSRCS_$(d) += fsmc.c cSRCS_$(d) += gpio.c cSRCS_$(d) += rcc.c +cSRCS_$(d) += spi.c cSRCS_$(d) += syscfg.c cSRCS_$(d) += timer.c cSRCS_$(d) += usart.c diff --git a/libmaple/stm32f2/spi.c b/libmaple/stm32f2/spi.c new file mode 100644 index 0000000..cfd9995 --- /dev/null +++ b/libmaple/stm32f2/spi.c @@ -0,0 +1,88 @@ +/****************************************************************************** + * 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; + } +} |