1 files changed, 88 insertions, 0 deletions
diff --git a/libmaple/stm32f2-f4/spi.c b/libmaple/stm32f2-f4/spi.c
new file mode 100644
index 0000000..cfd9995
--- /dev/null
+++ b/libmaple/stm32f2-f4/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;
+    }
+}