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/**
* @brief Sets up a transfer from I2C controller
*
* Set target address, transfer direction, burst length, START+STOP generation.
* @note Reading/writing data must be done separately.
*
* @param[in] i2c Pointer to the register overlay for the peripheral
* @param[in] targetAddr Target address [0x00, 0x3FF]
* @param[in] direction One of @ref DL_I2C_CONTROLLER_DIRECTION
* @param[in] length Intended burst length in number of bytes
*/
__STATIC_INLINE void DL_I2C_startControllerTransfer(I2C_Regs *i2c,
uint32_t targetAddr, DL_I2C_CONTROLLER_DIRECTION direction,
uint16_t length)
{
// Specify target address and read/write mode
DL_Common_updateReg(&i2c->MASTER.MSA,
((targetAddr << I2C_MSA_SADDR_OFS) | (uint32_t) direction),
(I2C_MSA_SADDR_MASK | I2C_MSA_DIR_MASK));
// STOP bit is generated after burst length number of bytes transferred
DL_Common_updateReg(&i2c->MASTER.MCTR,
(((uint32_t) length << I2C_MCTR_MBLEN_OFS) | I2C_MCTR_BURSTRUN_ENABLE |
I2C_MCTR_START_ENABLE | I2C_MCTR_STOP_ENABLE),
(I2C_MCTR_MBLEN_MASK | I2C_MCTR_BURSTRUN_MASK | I2C_MCTR_START_MASK |
I2C_MCTR_STOP_MASK));
}
