diff options
Diffstat (limited to 'libmaple/include/libmaple/i2c.h')
| -rw-r--r-- | libmaple/include/libmaple/i2c.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/libmaple/include/libmaple/i2c.h b/libmaple/include/libmaple/i2c.h index d4eac61..5a9da58 100644 --- a/libmaple/include/libmaple/i2c.h +++ b/libmaple/include/libmaple/i2c.h @@ -29,12 +29,19 @@ * @file libmaple/include/libmaple/i2c.h * @brief Inter-Integrated Circuit (I2C) peripheral support * - * Currently master-only. Usage notes: + * Supports Master and Slave. + * Master Usage notes: * * - Enable an I2C device with i2c_master_enable(). * - Initialize an array of struct i2c_msg to suit the bus * transactions (reads/writes) you wish to perform. * - Call i2c_master_xfer() to do the work. + * + * Slave Usage notes: + * - Enable I2C slave by calling i2c_slave_enable(). + * Check flags for usage. Enabling master also enabled slave. + * - initialise the i2c_msg struct and the data buffer + * - initialise the callback functions */ #ifndef _LIBMAPLE_I2C_H_ @@ -201,7 +208,7 @@ typedef struct i2c_msg { #define I2C_SLAVE_USE_RX_BUFFER 0x10 // Use a buffered message when doing a slave recv #define I2C_SLAVE_USE_TX_BUFFER 0x20 // Use a buffered message when doing a slave transmit #define I2C_SLAVE_DUAL_ADDRESS 0x40 // Enable the dual slave address scheme -#define I2C_SLAVE_GENERAL_CALL 0x80 // Enable the dual slave address scheme +#define I2C_SLAVE_GENERAL_CALL 0x80 // Enable the general call on address 0x00 void i2c_master_enable(i2c_dev *dev, uint32 flags); #define I2C_ERROR_PROTOCOL (-1) @@ -411,7 +418,7 @@ static inline void i2c_set_trise(i2c_dev *dev, uint32 trise) { dev->regs->TRISE = trise; } -/* Barry Carter +/* * Slave support */ |