diff options
Diffstat (limited to 'ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_arduino_uc_i2c.c')
| -rwxr-xr-x | ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_arduino_uc_i2c.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_arduino_uc_i2c.c b/ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_arduino_uc_i2c.c new file mode 100755 index 000000000..263766818 --- /dev/null +++ b/ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_arduino_uc_i2c.c @@ -0,0 +1,206 @@ +/* + + u8g_com_arduino_uc_i2c.c + + com interface for arduino (AND atmega) and the SSDxxxx chip (SOLOMON) variant + I2C protocol + + ToDo: Rename this to u8g_com_avr_ssd_i2c.c + + Universal 8bit Graphics Library + + Copyright (c) 2012, olikraus@gmail.com + All rights reserved. + + Redistribution and use in source and binary forms, with or without modification, + are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, this list + of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above copyright notice, this + list of conditions and the following disclaimer in the documentation and/or other + materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND + CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, + INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR + CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + Special pin usage: + U8G_PI_I2C_OPTION additional options + U8G_PI_A0_STATE used to store the last value of the command/data register selection + U8G_PI_SET_A0 1: Signal request to update I2C device with new A0_STATE, 0: Do nothing, A0_STATE matches I2C device + U8G_PI_SCL clock line (NOT USED) + U8G_PI_SDA data line (NOT USED) + + U8G_PI_RESET reset line (currently disabled, see below) + + Protocol: + SLA, Cmd/Data Selection, Arguments + The command/data register is selected by a special instruction byte, which is sent after SLA + + The continue bit is always 0 so that a (re)start is equired for the change from cmd to/data mode +*/ + +#include "u8g.h" + +#if defined(U8G_WITH_PINLIST) + +#define DOGM240_SLA_CMD (0x38*2) +#define DOGM240_SLA_DATA (0x39*2) + +uint8_t u8g_com_arduino_uc_start_sequence(u8g_t *u8g) +{ + /* are we requested to set the a0 state? */ + if ( u8g->pin_list[U8G_PI_SET_A0] == 0 ) + return 1; + + if ( u8g->pin_list[U8G_PI_A0_STATE] == 0 ) + { + if ( u8g_i2c_start(DOGM240_SLA_CMD) == 0 ) + return 0; + } + else + { + if ( u8g_i2c_start(DOGM240_SLA_DATA) == 0 ) + return 0; + } + + u8g->pin_list[U8G_PI_SET_A0] = 0; + return 1; +} + +uint8_t u8g_com_arduino_uc_i2c_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) +{ + switch(msg) + { + case U8G_COM_MSG_INIT: + //u8g_com_arduino_digital_write(u8g, U8G_PI_SCL, HIGH); + //u8g_com_arduino_digital_write(u8g, U8G_PI_SDA, HIGH); + //u8g->pin_list[U8G_PI_A0_STATE] = 0; /* inital RS state: unknown mode */ + + u8g_i2c_init(u8g->pin_list[U8G_PI_I2C_OPTION]); + + break; + + case U8G_COM_MSG_STOP: + break; + + case U8G_COM_MSG_RESET: + /* Currently disabled, but it could be enable. Previous restrictions have been removed */ + /* u8g_com_arduino_digital_write(u8g, U8G_PI_RESET, arg_val); */ + break; + + case U8G_COM_MSG_CHIP_SELECT: + u8g->pin_list[U8G_PI_A0_STATE] = 0; + u8g->pin_list[U8G_PI_SET_A0] = 1; /* force a0 to set again, also forces start condition */ + if ( arg_val == 0 ) + { + /* disable chip, send stop condition */ + u8g_i2c_stop(); + } + else + { + /* enable, do nothing: any byte writing will trigger the i2c start */ + } + break; + + case U8G_COM_MSG_WRITE_BYTE: + //u8g->pin_list[U8G_PI_SET_A0] = 1; + if ( u8g_com_arduino_uc_start_sequence(u8g) == 0 ) + return u8g_i2c_stop(), 0; + if ( u8g_i2c_send_byte(arg_val) == 0 ) + return u8g_i2c_stop(), 0; + // u8g_i2c_stop(); + break; + + case U8G_COM_MSG_WRITE_SEQ: + //u8g->pin_list[U8G_PI_SET_A0] = 1; + if ( u8g_com_arduino_uc_start_sequence(u8g) == 0 ) + return u8g_i2c_stop(), 0; + { + register uint8_t *ptr = arg_ptr; + while( arg_val > 0 ) + { + if ( u8g_i2c_send_byte(*ptr++) == 0 ) + return u8g_i2c_stop(), 0; + arg_val--; + } + } + // u8g_i2c_stop(); + break; + + case U8G_COM_MSG_WRITE_SEQ_P: + //u8g->pin_list[U8G_PI_SET_A0] = 1; + if ( u8g_com_arduino_uc_start_sequence(u8g) == 0 ) + return u8g_i2c_stop(), 0; + { + register uint8_t *ptr = arg_ptr; + while( arg_val > 0 ) + { + if ( u8g_i2c_send_byte(u8g_pgm_read(ptr)) == 0 ) + return 0; + ptr++; + arg_val--; + } + } + // u8g_i2c_stop(); + break; + + case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */ + u8g->pin_list[U8G_PI_A0_STATE] = arg_val; + u8g->pin_list[U8G_PI_SET_A0] = 1; /* force a0 to set again */ + +#ifdef OLD_CODE + if ( i2c_state != 0 ) + { + u8g_i2c_stop(); + i2c_state = 0; + } + + if ( u8g_com_arduino_uc_start_sequence(arg_val) == 0 ) + return 0; + + /* setup bus, might be a repeated start */ + /* + if ( u8g_i2c_start(I2C_SLA) == 0 ) + return 0; + if ( arg_val == 0 ) + { + i2c_state = 1; + + if ( u8g_i2c_send_byte(I2C_CMD_MODE) == 0 ) + return 0; + } + else + { + i2c_state = 2; + if ( u8g_i2c_send_byte(I2C_DATA_MODE) == 0 ) + return 0; + } + */ +#endif + break; + } + return 1; +} + +#else /* defined(U8G_WITH_PINLIST) */ + +uint8_t u8g_com_arduino_uc_i2c_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) +{ + return 1; +} + +#endif /* defined(U8G_WITH_PINLIST) */ + |