- tx and rx callbacks for each module
 - Callbacks can be called after each read/write cycle or per byte
 - Each I2C module can have different callbacks
 - General call support also working
 - Supports master and slave at same time. Also works with multimaster

Usage:

i2c_msg msg;
char buffer[255];

main()
{
    i2c_slave_enable(I2C1, I2C_FAST_MODE | I2C_SLAVE_DUAL_ADDRESS | I2C_SLAVE_GENERAL_CALL | I2C_SLAVE_USE_RX_BUFFER); // init slave mode. Enables master too
    i2c_slave_attach_recv_handler(I2C1, pmsg, funcrx); // attach  receive handler
    i2c_slave_attach_transmit_handler(I2C1, pmsg, functx);   // attach transmit handler
    i2c_slave_set_own_address(I2C1, 0x10);    // set addresss 1
    i2c_slave_set_own_address2(I2C1, 0x20);   // set addresss 2
}

void funcrx(i2c_msg *msg)
{
    printf("length is %d.\n", msg->length);
    char return_data = msg0>data[0];
}

void functx(i2c_msg *dev)
{
    msg->data[0] = 0x01;
    msg->data[1] = 0x02;
    msg->data[2] = 0x03;
    msg->data[3] = 0x04;
    msg->data[4] = 0x05;
    msg->length = 5;
}

All code derived from datasheets and libmaple.
Signed-off-by:- Barry Carter <barry.carter@gmail.com>
I2C slave support cleanups.

Added fix for corner case where badly behaving master doesn't NACK and we don't get the callbacks fires.

Removed my own name from several places and added attribution to the correct place.

Updated include comments to reference the fact it now supports I2C slave

Signed-off-by:- Barry Carter <barry.carter@gmail.com>
Added I2C slave echo example in examples folder. Using another maple, write a byte and then read.
Slight tidy up.
Reformatted CREDITS file to be in correct order.
Added a note about buffer overrun

Signed-off-by:- Barry Carter <barry.carter@gmail.com>
build-rules.mk: allow user to override dfu-util path.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
Merge pull request #54 from ginge/master

Added i2c slave support
Merge branch 'master' of github.com:leaflabs/libmaple
Revert "Added I2C slave echo example in examples folder. Using another maple, write a byte and then read."

This reverts commit 594724951553a882758c11497a4f03828b4f43e6.

Reverting pull request #54, which breaks examples/i2c-mcp4725-dac.cpp.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
Revert "I2C slave support cleanups."

This reverts commit 39cd07a640ee87b7937738d36f17019b2865bfae.

Reverting pull request #54, which breaks examples/i2c-mcp4725-dac.cpp.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
Revert "- tx and rx callbacks for each module"

This reverts commit da01c80f24dc9c43ff951ea9fd283abb4628ceb7.

Reverting pull request #54, which breaks examples/i2c-mcp4725-dac.cpp.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
Merge branch 'revert-pull-54'
always clear ISR DMA bit before even calling handler
Merge pull request #83 from wesen/bug/clear-dma-irq-flag-first

always clear ISR DMA bit before even calling handler
Adding support for cm900 and opencm904 boards (robotis)

Signed-off-by: Grégoire Passault <g.passault@gmail.com>
Removing redundant defines (see #85)

Signed-off-by: Grégoire Passault <g.passault@gmail.com>
Merge pull request #85 from Gregwar/robotis

Adding support for cm900 and opencm904 boards (robotis)
Adding BOOTLOADER option to support Robotis bootloader different ROM

Signed-off-by: Grégoire Passault <g.passault@gmail.com>
Adding ROBOTIS "make install" and reset hook

Signed-off-by: Grégoire Passault <g.passault@gmail.com>
Merge pull request #89 from Gregwar/bootloader-option

Adding BOOTLOADER option to support Robotis bootloader different ROM
My changes for my own library extensions etc
I2C direct target