diff options
Diffstat (limited to 'libmaple/include/libmaple/i2c.h')
-rw-r--r-- | libmaple/include/libmaple/i2c.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/libmaple/include/libmaple/i2c.h b/libmaple/include/libmaple/i2c.h index ff1c313..d4eac61 100644 --- a/libmaple/include/libmaple/i2c.h +++ b/libmaple/include/libmaple/i2c.h @@ -93,6 +93,7 @@ typedef struct i2c_msg { #define I2C_MSG_READ 0x1 #define I2C_MSG_10BIT_ADDR 0x2 + /** * Bitwise OR of: * - I2C_MSG_READ (write is default) @@ -197,6 +198,10 @@ typedef struct i2c_msg { #define I2C_DUTY_16_9 0x2 // 16/9 duty ratio /* Flag 0x4 is reserved; DO NOT USE. */ #define I2C_BUS_RESET 0x8 // Perform a bus reset +#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 void i2c_master_enable(i2c_dev *dev, uint32 flags); #define I2C_ERROR_PROTOCOL (-1) @@ -406,6 +411,53 @@ static inline void i2c_set_trise(i2c_dev *dev, uint32 trise) { dev->regs->TRISE = trise; } +/* Barry Carter + * Slave support + */ + +/** + * @brief Enable Dual addressing mode to allow peripheral to have 2 addresses + * @param dev I2C device + */ +static inline void i2c_slave_dual_address_enable(i2c_dev *dev) { + dev->regs->OAR2 |= I2C_OAR2_ENDUAL; +} + +/** + * @brief Enable General Call to allow the unit to respond on addr 0x00 + * @param dev I2C device + */ +static inline void i2c_slave_general_call_enable(i2c_dev *dev) { + dev->regs->CR1 |= I2C_CR1_ENGC; +} + +/* callback functions */ +/* Callback handler for data received over the bus */ +void i2c_slave_attach_recv_handler(i2c_dev *dev, i2c_msg *msg, i2c_slave_recv_callback_func func); + +/* Callback handler for data being requested over the bus + * The callback function must call i2c_write to get the data over the bus + */ +void i2c_slave_attach_transmit_handler(i2c_dev *dev, i2c_msg *msg, i2c_slave_transmit_callback_func func); + +/** + * @brief Set the primary I2c slave address + * @param dev I2C device + * @param address the 8 or 10 bit i2c address + */ +static inline void i2c_slave_set_own_address(i2c_dev *dev, uint16 address) { + dev->regs->OAR1 = address <<1; +} + +/** + * @brief Set the secondary I2c slave address + * @param dev I2C device + * @param address the 8 or 10 bit i2c address + */ +static inline void i2c_slave_set_own_address2(i2c_dev *dev, uint16 address) { +dev->regs->OAR2 = (address <<1 ) | I2C_OAR2_ENDUAL; +} + #ifdef __cplusplus } #endif |