From 9ba028ef647bc033e5ec078acd7de9d5c28432a9 Mon Sep 17 00:00:00 2001
From: Marti Bolivar <mbolivar@leaflabs.com>
Date: Thu, 21 Jun 2012 16:30:16 -0400
Subject: STM32F1: i2c_config_gpios(): Do afio_remap() if we should.

This should help avoid surprising some users.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
---
 libmaple/stm32f1/i2c.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libmaple/stm32f1/i2c.c b/libmaple/stm32f1/i2c.c
index 4c9af30..5797940 100644
--- a/libmaple/stm32f1/i2c.c
+++ b/libmaple/stm32f1/i2c.c
@@ -44,6 +44,10 @@ i2c_dev* const I2C2 = &i2c2;
  */
 
 void i2c_config_gpios(const i2c_dev *dev) {
+    if ((dev->clk_id == RCC_I2C1) &&
+        (dev->sda_pin == 9) && (dev->scl_pin == 8)) {
+        afio_remap(AFIO_REMAP_I2C1);
+    }
     gpio_set_mode(dev->gpio_port, dev->sda_pin, GPIO_AF_OUTPUT_OD);
     gpio_set_mode(dev->gpio_port, dev->scl_pin, GPIO_AF_OUTPUT_OD);
 }
-- 
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