1 files changed, 99 insertions, 0 deletions
diff --git a/libmaple/stm32f2-f4/i2c.c b/libmaple/stm32f2-f4/i2c.c
new file mode 100644
index 0000000..42fd427
--- /dev/null
+++ b/libmaple/stm32f2-f4/i2c.c
@@ -0,0 +1,99 @@
+/******************************************************************************
+ * The MIT License
+ *
+ * Copyright (c) 2012 LeafLabs, LLC.
+ * Copyright (c) 2014 Google, Inc.
+ *
+ * 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.
+ *****************************************************************************/
+
+#include "i2c_private.h"
+#include <libmaple/i2c.h>
+
+/*
+ * Devices
+ */
+
+static i2c_dev i2c1 = I2C_DEV_NEW(1, &gpiob, 7, &gpiob, 6);
+static i2c_dev i2c2 = I2C_DEV_NEW(1, &gpioh, 5, &gpioh, 4);
+static i2c_dev i2c3 = I2C_DEV_NEW(1, &gpioh, 8, &gpioh, 7);
+
+/** I2C1 device */
+i2c_dev* const I2C1 = &i2c1;
+/** I2C2 device */
+i2c_dev* const I2C2 = &i2c2;
+/** I2C3 device */
+i2c_dev* const I2C3 = &i2c3;
+
+/*
+ * libmaple routines
+ */
+
+#define I2C_MODEF_FLAGS (GPIO_MODEF_TYPE_OD | GPIO_MODEF_SPEED_HIGH | \
+                         GPIO_MODEF_PUPD_PU)
+
+void i2c_config_gpios(const i2c_dev *dev) {
+    /* Untested... */
+    gpio_set_modef(sda_port(dev), dev->sda_pin, GPIO_MODE_AF, I2C_MODEF_FLAGS);
+    gpio_set_modef(scl_port(dev), dev->scl_pin, GPIO_MODE_AF, I2C_MODEF_FLAGS);
+    gpio_set_af(sda_port(dev), dev->sda_pin, GPIO_AF_I2C);
+    gpio_set_af(scl_port(dev), dev->scl_pin, GPIO_AF_I2C);
+}
+
+void i2c_master_release_bus(const i2c_dev *dev) {
+    /* Untested... */
+    unsigned flags = (GPIO_MODEF_TYPE_OD | GPIO_MODEF_SPEED_HIGH |
+                      GPIO_MODEF_PUPD_PU);
+    gpio_write_bit(scl_port(dev), dev->scl_pin, 1);
+    gpio_write_bit(sda_port(dev), dev->sda_pin, 1);
+    gpio_set_modef(scl_port(dev), dev->scl_pin, GPIO_MODE_OUTPUT,
+                   I2C_MODEF_FLAGS);
+    gpio_set_modef(sda_port(dev), dev->sda_pin, GPIO_MODE_OUTPUT,
+                   I2C_MODEF_FLAGS);
+}
+
+/*
+ * IRQ Handlers
+ */
+
+void __irq_i2c1_ev(void) {
+   _i2c_irq_handler(I2C1);
+}
+
+void __irq_i2c2_ev(void) {
+   _i2c_irq_handler(I2C2);
+}
+
+void __irq_i2c3_ev(void) {
+   _i2c_irq_handler(I2C3);
+}
+
+void __irq_i2c1_er(void) {
+    _i2c_irq_error_handler(I2C1);
+}
+
+void __irq_i2c2_er(void) {
+    _i2c_irq_error_handler(I2C2);
+}
+
+void __irq_i2c3_er(void) {
+    _i2c_irq_error_handler(I2C3);
+}