32 static bool _i2c_start_ex(io_pin_t sda, io_pin_t scl, bool pull_up)  in _i2c_start_ex()  argument
37 	while ((io_test_pin(sda) == false) || (io_test_pin(scl) == false))  in _i2c_start_ex()
49 		io_clear_pin(sda);	// Set LOW before switching to output  in _i2c_start_ex()
50 	io_output_pin(sda);  in _i2c_start_ex()
61 			io_input_pin(sda);  in _i2c_start_ex()
78 static bool _i2c_stop_ex(io_pin_t sda, io_pin_t scl, bool pull_up)  in _i2c_stop_ex()  argument
93 	while (io_test_pin(sda) == false)  in _i2c_stop_ex()
98 			debug_log_hex(sda);  in _i2c_stop_ex()
112 		io_clear_pin(sda);	// Don't tri-state if internal pull-up is used  in _i2c_stop_ex()
115 	io_output_pin(sda);	// Drive LOW  in _i2c_stop_ex()
132 	io_input_pin(sda);  in _i2c_stop_ex()
134 		io_set_pin(sda);  in _i2c_stop_ex()
193 static void _i2c_abort_ex(io_pin_t sda, io_pin_t scl, bool pull_up)  in _i2c_abort_ex()  argument
211 	_i2c_abort_safe(sda, pull_up);  in _i2c_abort_ex()
222 static bool _i2c_write_byte_ex(io_pin_t sda, io_pin_t scl, uint8_t value, bool pull_up)  in _i2c_write_byte_ex()  argument
237 				io_input_pin(sda);  in _i2c_write_byte_ex()
238 				io_set_pin(sda);  in _i2c_write_byte_ex()
241 				io_input_pin(sda);	// Release HIGH  in _i2c_write_byte_ex()
243 			if (io_test_pin(sda) == false)  in _i2c_write_byte_ex()
246 				debug_log_hex(sda);  in _i2c_write_byte_ex()
256 					io_clear_pin(sda);  in _i2c_write_byte_ex()
259 …io_output_pin(sda);	// [This is bad (will drive line for a moment), but more stable than letting l…  in _i2c_write_byte_ex()
265 				io_enable_pin(sda, false);  in _i2c_write_byte_ex()
266 				io_output_pin(sda);	// Drive LOW  in _i2c_write_byte_ex()
283 				io_input_pin(sda);	// Release HIGH  in _i2c_write_byte_ex()
285 					io_set_pin(sda);  in _i2c_write_byte_ex()
300     io_input_pin(sda);	// Release HIGH  in _i2c_write_byte_ex()
302 		io_set_pin(sda);	// Assuming letting line float won't confuse slave when pulling line LOW for ACK  in _i2c_write_byte_ex()
306     while ((_i2c_disable_ack_check == false) && (io_test_pin(sda)))  in _i2c_write_byte_ex()
311 			debug_log_hex_ex(sda, false);  in _i2c_write_byte_ex()
339 static bool _i2c_read_byte_ex(io_pin_t sda, io_pin_t scl, uint8_t* value, bool pull_up)  in _i2c_read_byte_ex()  argument
345 	io_input_pin(sda);  in _i2c_read_byte_ex()
347 …io_set_pin(sda);	// OK to leave line floating for a moment (better not to drive as slave will be p…  in _i2c_read_byte_ex()
373         (*value) |= ((io_test_pin(sda) ? 0x1 : 0x0) << (7 - i));   // MSB first  in _i2c_read_byte_ex()
388 bool i2c_read2_ex(io_pin_t sda, io_pin_t scl, uint8_t addr, uint8_t subaddr, uint8_t* value, bool p…  in i2c_read2_ex()  argument
390 	if (_i2c_start_ex(sda, scl, pull_up) == false)  in i2c_read2_ex()
393 	if (_i2c_write_byte_ex(sda, scl, addr & ~0x01, pull_up) == false)  in i2c_read2_ex()
403 	if (_i2c_write_byte_ex(sda, scl, subaddr, pull_up) == false)  in i2c_read2_ex()
418 	if (_i2c_start_ex(sda, scl, pull_up) == false)  in i2c_read2_ex()
423 	if (_i2c_write_byte_ex(sda, scl, addr | 0x01, pull_up) == false)  in i2c_read2_ex()
433 	if (_i2c_read_byte_ex(sda, scl, value, pull_up) == false)  in i2c_read2_ex()
443 	if (_i2c_stop_ex(sda, scl, pull_up) == false)  in i2c_read2_ex()
452 	_i2c_abort_ex(sda, scl, pull_up);  in i2c_read2_ex()
456 bool i2c_write_ex(io_pin_t sda, io_pin_t scl, uint8_t addr, uint8_t subaddr, uint8_t value, bool pu…  in i2c_write_ex()  argument
458 	if (_i2c_start_ex(sda, scl, pull_up) == false)  in i2c_write_ex()
461     if (_i2c_write_byte_ex(sda, scl, addr, pull_up) == false)  in i2c_write_ex()
464     if (_i2c_write_byte_ex(sda, scl, subaddr, pull_up) == false)  in i2c_write_ex()
467     if (_i2c_write_byte_ex(sda, scl, value, pull_up) == false)  in i2c_write_ex()
470     _i2c_stop_ex(sda, scl, pull_up);  in i2c_write_ex()
474 	_i2c_abort_ex(sda, scl, pull_up);  in i2c_write_ex()
478 bool i2c_write(io_pin_t sda, io_pin_t scl, uint8_t addr, uint8_t subaddr, uint8_t value)  in i2c_write()  argument
480 	return i2c_write_ex(sda, scl, addr, subaddr, value, false);  in i2c_write()
483 bool i2c_read_ex(io_pin_t sda, io_pin_t scl, uint8_t addr, uint8_t subaddr, uint8_t* value, bool pu…  in i2c_read_ex()  argument
485     if (_i2c_start_ex(sda, scl, pull_up) == false)  in i2c_read_ex()
488     if (_i2c_write_byte_ex(sda, scl, addr, pull_up) == false)  in i2c_read_ex()
491     if (_i2c_write_byte_ex(sda, scl, subaddr, pull_up) == false)  in i2c_read_ex()
494     if (_i2c_read_byte_ex(sda, scl, value, pull_up) == false)  in i2c_read_ex()
497     _i2c_stop_ex(sda, scl, pull_up);  in i2c_read_ex()
501 	_i2c_abort_ex(sda, scl, pull_up);  in i2c_read_ex()
505 bool i2c_read(io_pin_t sda, io_pin_t scl, uint8_t addr, uint8_t subaddr, uint8_t* value)  in i2c_read()  argument
507 	return i2c_read_ex(sda, scl, addr, subaddr, value, false);  in i2c_read()
510 void i2c_init_ex(io_pin_t sda, io_pin_t scl, bool pull_up)  in i2c_init_ex()  argument
512 	_i2c_abort_ex(sda, scl, pull_up);  in i2c_init_ex()
515 void i2c_init(io_pin_t sda, io_pin_t scl)  in i2c_init()  argument
517 	i2c_init_ex(sda, scl, false);  in i2c_init()