Hello every body,
I'm trying to implement an i2c communication between the FRDM-KL46Z and the MMA8451Q accelerometer but unfortunetly I don't understand the KSDK ver 1.3 API Reference Manual (I think traditional PExpert was a lot more helpful), so I want to know somebody who can explain me the following function:
i2c_status_t I2C_DRV_MasterSendDataBlocking ( uint32_t instance, const
i2c_device_t device, const uint8_t cmdBuff, uint32_t cmdSize, const uint8_t
txBuff, uint32_t txSize, uint32_t timeout_ms )
I don't understand the cmdBuff purpouse, what kind of information should be filled in? I think the txBuff already contains the bytes to be transmitted to the slave.
The only way this function returns a succesful flag is with cmdBuff = NULL an cmd size = 0.
Another issue is that the MMA8451Q manual explain the need of a Repeated Start, and as I bealive there is no way to do that with the standar i2c API, or at least I have no idea how to do that.
I think the KSDK API reference manual could be done a lot better by freescale.