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i2c support added.

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Most of the changes went to i2c_common_all.h file.
F3 is considerably different than all the other in i2c.
This commit is contained in:
Federico Ruiz Ugalde
2013-06-25 22:15:00 -06:00
committed by Piotr Esden-Tempski
parent b6bae46b71
commit be841154a9
7 changed files with 498 additions and 35 deletions
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93
lib/stm32/common/i2c_common_all.c
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@@ -100,7 +100,11 @@ when the current bus activity is completed.
void i2c_send_start(uint32_t i2c)
{
#ifdef STM32F3
I2C_CR2(i2c) |= I2C_CR2_START;
#else
I2C_CR1(i2c) |= I2C_CR1_START;
#endif
}
/*---------------------------------------------------------------------------*/
@@ -114,7 +118,11 @@ mode, or simply release the bus if in Slave mode.
void i2c_send_stop(uint32_t i2c)
{
#ifdef STM32F3
I2C_CR2(i2c) |= I2C_CR2_STOP;
#else
I2C_CR1(i2c) |= I2C_CR1_STOP;
#endif
}
/*---------------------------------------------------------------------------*/
@@ -126,7 +134,11 @@ Clear the "Send Stop" flag in the I2C config register
*/
void i2c_clear_stop(uint32_t i2c)
{
#ifdef STM32F3
I2C_CR2(i2c) &= ~I2C_CR2_STOP;
#else
I2C_CR1(i2c) &= ~I2C_CR1_STOP;
#endif
}
/*---------------------------------------------------------------------------*/
@@ -141,7 +153,11 @@ This sets an address for Slave mode operation, in 7 bit form.
void i2c_set_own_7bit_slave_address(uint32_t i2c, uint8_t slave)
{
I2C_OAR1(i2c) = (uint16_t)(slave << 1);
#ifdef STM32F3
I2C_OAR1(i2c) &= ~I2C_OAR1_OA1MODE;
#else
I2C_OAR1(i2c) &= ~I2C_OAR1_ADDMODE;
#endif
I2C_OAR1(i2c) |= (1 << 14); /* Datasheet: always keep 1 by software. */
}
@@ -158,9 +174,52 @@ This sets an address for Slave mode operation, in 10 bit form.
void i2c_set_own_10bit_slave_address(uint32_t i2c, uint16_t slave)
{
#ifdef STM32F3
I2C_OAR1(i2c) = (uint16_t)(I2C_OAR1_OA1MODE | slave);
#else
I2C_OAR1(i2c) = (uint16_t)(I2C_OAR1_ADDMODE | slave);
#endif
}
/*---------------------------------------------------------------------------*/
/** @brief I2C Set Peripheral Clock Frequency.
Set the peripheral clock frequency: 2MHz to 36MHz (the APB frequency). Note
that this is <b> not </b> the I2C bus clock. This is set in conjunction with
the Clock Control register to generate the Master bus clock, see @ref
i2c_set_ccr
@param[in] i2c Unsigned int32. I2C register base address @ref i2c_reg_base.
@param[in] freq Unsigned int8. Clock Frequency Setting @ref i2c_clock.
*/
void i2c_set_clock_frequency(uint32_t i2c, uint8_t freq)
{
uint16_t reg16;
reg16 = I2C_CR2(i2c) & 0xffc0; /* Clear bits [5:0]. */
reg16 |= freq;
I2C_CR2(i2c) = reg16;
}
/*---------------------------------------------------------------------------*/
/** @brief I2C Send Data.
@param[in] i2c Unsigned int32. I2C register base address @ref i2c_reg_base.
@param[in] data Unsigned int8. Byte to send.
*/
void i2c_send_data(uint32_t i2c, uint8_t data)
{
#if defined(STM32F3)
I2C_TXDR(i2c) = data;
#else
I2C_DR(i2c) = data;
#endif
}
#ifndef STM32F3
/*---------------------------------------------------------------------------*/
/** @brief I2C Set Fast Mode.
@@ -189,26 +248,6 @@ void i2c_set_standard_mode(uint32_t i2c)
I2C_CCR(i2c) &= ~I2C_CCR_FS;
}
/*---------------------------------------------------------------------------*/
/** @brief I2C Set Peripheral Clock Frequency.
Set the peripheral clock frequency: 2MHz to 36MHz (the APB frequency). Note
that this is <b> not </b> the I2C bus clock. This is set in conjunction with
the Clock Control register to generate the Master bus clock, see @ref
i2c_set_ccr
@param[in] i2c Unsigned int32. I2C register base address @ref i2c_reg_base.
@param[in] freq Unsigned int8. Clock Frequency Setting @ref i2c_clock.
*/
void i2c_set_clock_frequency(uint32_t i2c, uint8_t freq)
{
uint16_t reg16;
reg16 = I2C_CR2(i2c) & 0xffc0; /* Clear bits [5:0]. */
reg16 |= freq;
I2C_CR2(i2c) = reg16;
}
/*---------------------------------------------------------------------------*/
/** @brief I2C Set Bus Clock Frequency.
@@ -264,18 +303,6 @@ void i2c_send_7bit_address(uint32_t i2c, uint8_t slave, uint8_t readwrite)
I2C_DR(i2c) = (uint8_t)((slave << 1) | readwrite);
}
/*---------------------------------------------------------------------------*/
/** @brief I2C Send Data.
@param[in] i2c Unsigned int32. I2C register base address @ref i2c_reg_base.
@param[in] data Unsigned int8. Byte to send.
*/
void i2c_send_data(uint32_t i2c, uint8_t data)
{
I2C_DR(i2c) = data;
}
/*---------------------------------------------------------------------------*/
/** @brief I2C Get Data.
@@ -409,3 +436,5 @@ void i2c_clear_dma_last_transfer(uint32_t i2c)
}
/**@}*/
#endif