From 30df075c3d87ce38ebc151d052cdfcd14eb56be5 Mon Sep 17 00:00:00 2001
From: lilian <lilian.marazano@gmail.com>
Date: Sun, 20 Aug 2017 11:47:08 -0300
Subject: [PATCH] change freq definition + add lower frequency for test

---
 extras/i2c/i2c.c |  4 ++--
 extras/i2c/i2c.h | 17 +++++++++++------
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/extras/i2c/i2c.c b/extras/i2c/i2c.c
index d519735..034bcdc 100644
--- a/extras/i2c/i2c.c
+++ b/extras/i2c/i2c.c
@@ -45,7 +45,7 @@ inline bool i2c_status(uint8_t bus)
     return i2c_bus[bus].started;
 }
 
-void i2c_init(uint8_t bus, uint8_t scl_pin, uint8_t sda_pin, uint8_t freq)
+void i2c_init(uint8_t bus, uint8_t scl_pin, uint8_t sda_pin, i2c_freq_t freq)
 {
     i2c_bus[bus].started = false;
     i2c_bus[bus].flag = false ;
@@ -71,7 +71,7 @@ void i2c_init(uint8_t bus, uint8_t scl_pin, uint8_t sda_pin, uint8_t freq)
 
 }
 
-void i2c_frequency(uint8_t bus, uint8_t freq)
+void i2c_frequency(uint8_t bus, i2c_freq_t freq)
 {
     i2c_bus[bus].frequency = freq ;
 }
diff --git a/extras/i2c/i2c.h b/extras/i2c/i2c.h
index 45fa10c..c2e31cd 100644
--- a/extras/i2c/i2c.h
+++ b/extras/i2c/i2c.h
@@ -47,11 +47,16 @@ extern "C" {
  *  Warning : 1 is minimal, that mean at 80MHz clock, frequency max is 320kHz
  *  Array format is  { {160MHz, 80MHz} ,  {160MHz, 80MHz} , ... }
  */
- #define I2C_FREQ_100K 0
- #define I2C_FREQ_400K 1
- #define I2C_FREQ_500K 2
+#define NB_FREQ_AVAILABLE 4
 
-const static uint8_t i2c_freq_array[3][2] = { {100,20}, {10,1}, {6,1} } ;
+ typedef enum {
+ 	I2C_FREQ_80K = 0,
+ 	I2C_FREQ_100K,
+ 	I2C_FREQ_400K,
+ 	I2C_FREQ_500K,
+} i2c_freq_t;
+
+const static uint8_t i2c_freq_array[NB_FREQ_AVAILABLE][2] = { {255,35}, {100,20}, {10,1}, {6,1} } ;
 
 /**
  * Device descriptor
@@ -87,14 +92,14 @@ typedef struct i2c_bus_description {
  * @param sda_pin SDA pin for I2C
  * @param freq frequency of bus (ex : I2C_FREQ_400K)
  */
-void i2c_init(uint8_t bus, uint8_t scl_pin, uint8_t sda_pin, uint8_t freq);
+void i2c_init(uint8_t bus, uint8_t scl_pin, uint8_t sda_pin, i2c_freq_t freq);
 
 /**
  * Change bus frequency
  * @param bus Bus i2c selection
  * @param freq frequency of bus (ex : I2C_FREQ_400K)
  */
-void i2c_frequency(uint8_t bus, uint8_t freq);
+void i2c_frequency(uint8_t bus, i2c_freq_t freq);
 
 /**
  * Write a byte to I2C bus.