diff options
Diffstat (limited to 'ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_arduino_attiny85_hw_spi.c')
| -rwxr-xr-x | ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_arduino_attiny85_hw_spi.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_arduino_attiny85_hw_spi.c b/ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_arduino_attiny85_hw_spi.c new file mode 100755 index 000000000..9d0191eae --- /dev/null +++ b/ArduinoAddons/Arduino_1.6.x/hardware/marlin/avr/libraries/U8glib/utility/u8g_com_arduino_attiny85_hw_spi.c @@ -0,0 +1,160 @@ +/* + + u8g_arduino_ATtiny85_std_hw_spi.c + + Universal 8bit Graphics Library + + Copyright (c) 2011, 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. + +*/ + +// Uses code from tinySPI Written by Nick Gammon +// March 2013 + +// ATMEL ATTINY45 / ARDUINO pin mappings +// +// +-\/-+ +// RESET Ain0 (D 5) PB5 1| |8 Vcc +// CLK1 Ain3 (D 3) PB3 2| |7 PB2 (D 2) Ain1 SCK / USCK / SCL +// CLK0 Ain2 (D 4) PB4 3| |6 PB1 (D 1) pwm1 MISO / DO +// GND 4| |5 PB0 (D 0) pwm0 MOSI / DI / SDA +// +----+ + + +#include "u8g.h" + + +#if defined(ARDUINO) && defined(__AVR_ATtiny85__) + +#if ARDUINO < 100 +#include <WProgram.h> +#else +#include <Arduino.h> +#endif + +const byte DI = 0; // D0, pin 5 Data In +const byte DO = 1; // D1, pin 6 Data Out (this is *not* MOSI) +const byte USCK = 2; // D2, pin 7 Universal Serial Interface clock + +uint8_t u8g_arduino_ATtiny85_spi_out(uint8_t val) +{ + USIDR = val; // byte to output + USISR = _BV (USIOIF); // clear Counter Overflow Interrupt Flag, set count to zero + do + { + USICR = _BV (USIWM0) // 3-wire mode + | _BV (USICS1) | _BV (USICLK) // Software clock strobe + | _BV (USITC); // Toggle Clock Port Pin + } + while ((USISR & _BV (USIOIF)) == 0); // until Counter Overflow Interrupt Flag set + + return USIDR; // return read data +} + +uint8_t u8g_com_arduino_ATtiny85_std_hw_spi_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_CS, HIGH); // ensure SS stays high until needed + pinMode (USCK, OUTPUT); + pinMode (DO, OUTPUT); + pinMode (u8g->pin_list[U8G_PI_CS], OUTPUT); + pinMode (u8g->pin_list[U8G_PI_A0], OUTPUT); + USICR = _BV (USIWM0); // 3-wire mode + u8g_MicroDelay(); + break; + + case U8G_COM_MSG_STOP: + break; + + case U8G_COM_MSG_RESET: + if ( u8g->pin_list[U8G_PI_RESET] != U8G_PIN_NONE ) + u8g_com_arduino_digital_write(u8g, U8G_PI_RESET, arg_val); + break; + + case U8G_COM_MSG_CHIP_SELECT: + if ( arg_val == 0 ) + { + /* disable */ + u8g_MicroDelay(); + u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH); + u8g_MicroDelay(); + } + else + { + /* enable */ + u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW); + u8g_MicroDelay(); + } + break; + + case U8G_COM_MSG_WRITE_BYTE: + u8g_arduino_ATtiny85_spi_out(arg_val); + u8g_MicroDelay(); + break; + + case U8G_COM_MSG_WRITE_SEQ: + { + register uint8_t *ptr = arg_ptr; + while( arg_val > 0 ) + { + u8g_arduino_ATtiny85_spi_out(*ptr++); + arg_val--; + } + } + break; + + case U8G_COM_MSG_WRITE_SEQ_P: + { + register uint8_t *ptr = arg_ptr; + while( arg_val > 0 ) + { + u8g_arduino_ATtiny85_spi_out(u8g_pgm_read(ptr)); + ptr++; + arg_val--; + } + } + break; + + case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */ + u8g_com_arduino_digital_write(u8g, U8G_PI_A0, arg_val); + u8g_MicroDelay(); + break; + } + return 1; +} + +#else /* ARDUINO */ + +uint8_t u8g_com_arduino_ATtiny85_std_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) +{ + return 1; +} + +#endif /* ARDUINO */
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