From eca7d9fd212a8795f278660cdad853088fa01186 Mon Sep 17 00:00:00 2001
From: ProDrone <me@prodrone.com>
Date: Tue, 22 Sep 2015 17:56:34 +0200
Subject: [PATCH] Add CLI variable i2c_overclock

Add i2c_overclock to master config and bump version
Start using the i2c_overclock CLI setting to initialize i2c clock speed
selector for F1 targets.
---
 src/main/config/config.c        | 3 ++-
 src/main/config/config_master.h | 1 +
 src/main/io/serial_cli.c        | 1 +
 src/main/main.c                 | 1 +
 4 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/main/config/config.c b/src/main/config/config.c
index 289f2e571d..84bbaf4de2 100755
--- a/src/main/config/config.c
+++ b/src/main/config/config.c
@@ -128,7 +128,7 @@ static uint32_t activeFeaturesLatch = 0;
 static uint8_t currentControlRateProfileIndex = 0;
 controlRateConfig_t *currentControlRateProfile;
 
-static const uint8_t EEPROM_CONF_VERSION = 108;
+static const uint8_t EEPROM_CONF_VERSION = 109;
 
 static void resetAccelerometerTrims(flightDynamicsTrims_t *accelerometerTrims)
 {
@@ -453,6 +453,7 @@ static void resetConf(void)
     resetSerialConfig(&masterConfig.serialConfig);
 
     masterConfig.emf_avoidance = 0;
+    masterConfig.i2c_overclock = 0;
 
     resetPidProfile(&currentProfile->pidProfile);
 
diff --git a/src/main/config/config_master.h b/src/main/config/config_master.h
index 723af0ccf8..d14345dc8e 100644
--- a/src/main/config/config_master.h
+++ b/src/main/config/config_master.h
@@ -26,6 +26,7 @@ typedef struct master_t {
     uint8_t mixerMode;
     uint32_t enabledFeatures;
     uint8_t emf_avoidance;                   // change pll settings to avoid noise in the uhf band
+    uint8_t i2c_overclock;                  // i2c clockspeed, 0 = 400kHz default (conform specs), 1 = 800kHz, 2 = 1200kHz
 
     motorMixer_t customMotorMixer[MAX_SUPPORTED_MOTORS];
 #ifdef USE_SERVOS
diff --git a/src/main/io/serial_cli.c b/src/main/io/serial_cli.c
index 8452e3eb6a..d1023872c9 100644
--- a/src/main/io/serial_cli.c
+++ b/src/main/io/serial_cli.c
@@ -325,6 +325,7 @@ typedef struct {
 
 const clivalue_t valueTable[] = {
     { "emf_avoidance",              VAR_UINT8  | MASTER_VALUE,  &masterConfig.emf_avoidance, 0, 1 },
+    { "i2c_overclock",              VAR_UINT8  | MASTER_VALUE,  &masterConfig.i2c_overclock, 0, 2 },
 
     { "mid_rc",                     VAR_UINT16 | MASTER_VALUE,  &masterConfig.rxConfig.midrc, 1200, 1700 },
     { "min_check",                  VAR_UINT16 | MASTER_VALUE,  &masterConfig.rxConfig.mincheck, PWM_RANGE_ZERO, PWM_RANGE_MAX },
diff --git a/src/main/main.c b/src/main/main.c
index 95b6f63988..e563cd29e6 100644
--- a/src/main/main.c
+++ b/src/main/main.c
@@ -168,6 +168,7 @@ void init(void)
     // Configure the System clock frequency, HCLK, PCLK2 and PCLK1 prescalers
     // Configure the Flash Latency cycles and enable prefetch buffer
     SetSysClock(masterConfig.emf_avoidance);
+    i2cSetClockSelect(masterConfig.i2c_overclock);
 #endif
 
 #ifdef USE_HARDWARE_REVISION_DETECTION