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STM32F1: Support for I2C_OAR2 (Dual addressing)

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This commit is contained in:
Angus Peart
2015-01-27 14:58:58 +11:00
committed by Piotr Esden-Tempski
parent 98855af279
commit 60739968bd
2 changed files with 44 additions and 3 deletions
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3
include/libopencm3/stm32/common/i2c_common_all.h
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@@ -369,6 +369,9 @@ void i2c_send_stop(uint32_t i2c);
void i2c_clear_stop(uint32_t i2c);
void i2c_set_own_7bit_slave_address(uint32_t i2c, uint8_t slave);
void i2c_set_own_10bit_slave_address(uint32_t i2c, uint16_t slave);
void i2c_set_own_7bit_slave_address_two(uint32_t i2c, uint8_t slave);
void i2c_enable_dual_addressing_mode(uint32_t i2c);
void i2c_disable_dual_addressing_mode(uint32_t i2c);
void i2c_set_clock_frequency(uint32_t i2c, uint8_t freq);
void i2c_send_data(uint32_t i2c, uint8_t data);
void i2c_set_fast_mode(uint32_t i2c);

44
lib/stm32/common/i2c_common_all.c
View File

@@ -155,11 +155,8 @@ void i2c_set_own_7bit_slave_address(uint32_t i2c, uint8_t slave)
/*---------------------------------------------------------------------------*/
/** @brief I2C Set the 10 bit Slave Address for the Peripheral.
This sets an address for Slave mode operation, in 10 bit form.
@todo add "I2C_OAR1(i2c) |= (1 << 14);" as above
@param[in] i2c Unsigned int32. I2C register base address @ref i2c_reg_base.
@param[in] slave Unsigned int16. Slave address 0...1023.
*/
@@ -169,6 +166,47 @@ void i2c_set_own_10bit_slave_address(uint32_t i2c, uint16_t slave)
I2C_OAR1(i2c) = (uint16_t)(I2C_OAR1_ADDMODE | slave);
}
/*---------------------------------------------------------------------------*/
/** @brief I2C Set the secondary 7 bit Slave Address for the Peripheral.
This sets a secondary address for Slave mode operation, in 7 bit form.
@param[in] i2c Unsigned int32. I2C register base address @ref i2c_reg_base.
@param[in] slave Unsigned int8. Slave address 0...127.
*/
void i2c_set_own_7bit_slave_address_two(uint32_t i2c, uint8_t slave)
{
uint16_t val = (uint16_t)(slave << 1);
I2C_OAR2(i2c) = val;
}
/*---------------------------------------------------------------------------*/
/** @brief I2C Enable dual addressing mode for the Peripheral.
Both OAR1 and OAR2 are recognised in 7-bit addressing mode.
@param[in] i2c Unsigned int32. I2C register base address @ref i2c_reg_base.
*/
void i2c_enable_dual_addressing_mode(uint32_t i2c)
{
I2C_OAR2(i2c) |= I2C_OAR2_ENDUAL;
}
/*---------------------------------------------------------------------------*/
/** @brief I2C Disable dual addressing mode for the Peripheral.
Only OAR1 is recognised in 7-bit addressing mode.
@param[in] i2c Unsigned int32. I2C register base address @ref i2c_reg_base.
*/
void i2c_disable_dual_addressing_mode(uint32_t i2c)
{
I2C_OAR2(i2c) &= ~(I2C_OAR2_ENDUAL);
}
/*---------------------------------------------------------------------------*/
/** @brief I2C Set Peripheral Clock Frequency.