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Fix #471

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This commit is contained in:
rus 2017-10-25 12:58:00 +05:00
parent 7cd1afc52d
commit 1d3ca574f1
6 changed files with 54 additions and 31 deletions
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19
extras/i2c/i2c.h
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@ -40,10 +40,12 @@ extern "C" {
/**
* Define i2c bus max number
*/
#ifndef MAX_I2C_BUS
#define MAX_I2C_BUS 2
#ifndef I2C_MAX_BUS
#define I2C_MAX_BUS 2
#endif
#define I2C_DEFAULT_CLK_STRETCH (10)
typedef enum
{
I2C_FREQ_80K = 0,//!< I2C_FREQ_80K
@ -69,15 +71,24 @@ typedef struct i2c_dev
* @param scl_pin SCL pin for I2C
* @param sda_pin SDA pin for I2C
* @param freq frequency of bus (ex : I2C_FREQ_400K)
* @param clk_stretch I2C clock stretch. I2C_DEFAULT_CLK_STRETCH would be good in most cases
* @return Non-zero if error occured
*/
void i2c_init(uint8_t bus, uint8_t scl_pin, uint8_t sda_pin, i2c_freq_t freq);
int 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, i2c_freq_t freq);
void i2c_set_frequency(uint8_t bus, i2c_freq_t freq);
/**
* Change clock stretch
* @param bus I2C bus
* @param clk_stretch I2C clock stretch. I2C_DEFAULT_CLK_STRETCH by default
*/
void i2c_set_clock_stretch(uint8_t bus, uint32_t clk_stretch);
/**
* Write a byte to I2C bus.