iforce2d Chris / Mbed 2 deprecated ubxDistanceMeter

Displays distance to start location on OLED screen.

Dependencies:   mbed

u8g_com_arduino_st7920_hw_spi.c@0:972874f31c98, 2018-03-07 (annotated)

Committer:
iforce2d
Date:
Wed Mar 07 12:49:14 2018 +0000
Revision:
0:972874f31c98
First commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
iforce2d 0:972874f31c98 1 /*
iforce2d 0:972874f31c98 2
iforce2d 0:972874f31c98 3 u8g_com_arduino_st7920_hw_spi.c
iforce2d 0:972874f31c98 4
iforce2d 0:972874f31c98 5 Universal 8bit Graphics Library
iforce2d 0:972874f31c98 6
iforce2d 0:972874f31c98 7 Copyright (c) 2011, olikraus@gmail.com
iforce2d 0:972874f31c98 8 All rights reserved.
iforce2d 0:972874f31c98 9
iforce2d 0:972874f31c98 10 Redistribution and use in source and binary forms, with or without modification,
iforce2d 0:972874f31c98 11 are permitted provided that the following conditions are met:
iforce2d 0:972874f31c98 12
iforce2d 0:972874f31c98 13 * Redistributions of source code must retain the above copyright notice, this list
iforce2d 0:972874f31c98 14 of conditions and the following disclaimer.
iforce2d 0:972874f31c98 15
iforce2d 0:972874f31c98 16 * Redistributions in binary form must reproduce the above copyright notice, this
iforce2d 0:972874f31c98 17 list of conditions and the following disclaimer in the documentation and/or other
iforce2d 0:972874f31c98 18 materials provided with the distribution.
iforce2d 0:972874f31c98 19
iforce2d 0:972874f31c98 20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
iforce2d 0:972874f31c98 21 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
iforce2d 0:972874f31c98 22 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
iforce2d 0:972874f31c98 23 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
iforce2d 0:972874f31c98 24 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
iforce2d 0:972874f31c98 25 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
iforce2d 0:972874f31c98 26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
iforce2d 0:972874f31c98 27 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
iforce2d 0:972874f31c98 28 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
iforce2d 0:972874f31c98 29 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
iforce2d 0:972874f31c98 30 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
iforce2d 0:972874f31c98 31 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
iforce2d 0:972874f31c98 32 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
iforce2d 0:972874f31c98 33
iforce2d 0:972874f31c98 34 A special HW SPI interface for ST7920 controller
iforce2d 0:972874f31c98 35
iforce2d 0:972874f31c98 36 */
iforce2d 0:972874f31c98 37
iforce2d 0:972874f31c98 38 #include "u8g.h"
iforce2d 0:972874f31c98 39
iforce2d 0:972874f31c98 40 #if defined(ARDUINO)
iforce2d 0:972874f31c98 41
iforce2d 0:972874f31c98 42 #if ARDUINO < 100
iforce2d 0:972874f31c98 43 #include <WProgram.h>
iforce2d 0:972874f31c98 44 #include "wiring_private.h"
iforce2d 0:972874f31c98 45 #include "pins_arduino.h"
iforce2d 0:972874f31c98 46
iforce2d 0:972874f31c98 47 #else
iforce2d 0:972874f31c98 48 #include <Arduino.h>
iforce2d 0:972874f31c98 49 #include "wiring_private.h"
iforce2d 0:972874f31c98 50 #endif
iforce2d 0:972874f31c98 51
iforce2d 0:972874f31c98 52 #if defined(__AVR__)
iforce2d 0:972874f31c98 53 #define U8G_ARDUINO_ATMEGA_HW_SPI
iforce2d 0:972874f31c98 54
iforce2d 0:972874f31c98 55 /* remove the definition for attiny */
iforce2d 0:972874f31c98 56 #if __AVR_ARCH__ == 2
iforce2d 0:972874f31c98 57 #undef U8G_ARDUINO_ATMEGA_HW_SPI
iforce2d 0:972874f31c98 58 #endif
iforce2d 0:972874f31c98 59 #if __AVR_ARCH__ == 25
iforce2d 0:972874f31c98 60 #undef U8G_ARDUINO_ATMEGA_HW_SPI
iforce2d 0:972874f31c98 61 #endif
iforce2d 0:972874f31c98 62
iforce2d 0:972874f31c98 63 #endif
iforce2d 0:972874f31c98 64
iforce2d 0:972874f31c98 65
iforce2d 0:972874f31c98 66 #if defined(U8G_ARDUINO_ATMEGA_HW_SPI)
iforce2d 0:972874f31c98 67
iforce2d 0:972874f31c98 68 #include <avr/interrupt.h>
iforce2d 0:972874f31c98 69 #include <avr/io.h>
iforce2d 0:972874f31c98 70
iforce2d 0:972874f31c98 71
iforce2d 0:972874f31c98 72 #if ARDUINO < 100
iforce2d 0:972874f31c98 73
iforce2d 0:972874f31c98 74 /* fixed pins */
iforce2d 0:972874f31c98 75 #if defined(__AVR_ATmega644P__) || defined(__AVR_ATmega1284P__) // Sanguino.cc board
iforce2d 0:972874f31c98 76 #define PIN_SCK 7
iforce2d 0:972874f31c98 77 #define PIN_MISO 6
iforce2d 0:972874f31c98 78 #define PIN_MOSI 5
iforce2d 0:972874f31c98 79 #define PIN_CS 4
iforce2d 0:972874f31c98 80 #else // Arduino Board
iforce2d 0:972874f31c98 81 #define PIN_SCK 13
iforce2d 0:972874f31c98 82 #define PIN_MISO 12
iforce2d 0:972874f31c98 83 #define PIN_MOSI 11
iforce2d 0:972874f31c98 84 #define PIN_CS 10
iforce2d 0:972874f31c98 85 #endif // (__AVR_ATmega644P__) || defined(__AVR_ATmega1284P__)
iforce2d 0:972874f31c98 86
iforce2d 0:972874f31c98 87 #else
iforce2d 0:972874f31c98 88
iforce2d 0:972874f31c98 89 /* use Arduino pin definitions */
iforce2d 0:972874f31c98 90 #define PIN_SCK SCK
iforce2d 0:972874f31c98 91 #define PIN_MISO MISO
iforce2d 0:972874f31c98 92 #define PIN_MOSI MOSI
iforce2d 0:972874f31c98 93 #define PIN_CS SS
iforce2d 0:972874f31c98 94
iforce2d 0:972874f31c98 95 #endif
iforce2d 0:972874f31c98 96
iforce2d 0:972874f31c98 97
iforce2d 0:972874f31c98 98 static uint8_t u8g_arduino_st7920_hw_spi_shift_out(u8g_t *u8g, uint8_t val) U8G_NOINLINE;
iforce2d 0:972874f31c98 99 static uint8_t u8g_arduino_st7920_hw_spi_shift_out(u8g_t *u8g, uint8_t val)
iforce2d 0:972874f31c98 100 {
iforce2d 0:972874f31c98 101 /* send data */
iforce2d 0:972874f31c98 102 SPDR = val;
iforce2d 0:972874f31c98 103 /* wait for transmission */
iforce2d 0:972874f31c98 104 while (!(SPSR & (1<<SPIF)))
iforce2d 0:972874f31c98 105 ;
iforce2d 0:972874f31c98 106 /* clear the SPIF flag by reading SPDR */
iforce2d 0:972874f31c98 107 return SPDR;
iforce2d 0:972874f31c98 108 }
iforce2d 0:972874f31c98 109
iforce2d 0:972874f31c98 110
iforce2d 0:972874f31c98 111 static void u8g_com_arduino_st7920_write_byte_hw_spi_seq(u8g_t *u8g, uint8_t rs, uint8_t *ptr, uint8_t len)
iforce2d 0:972874f31c98 112 {
iforce2d 0:972874f31c98 113 uint8_t i;
iforce2d 0:972874f31c98 114
iforce2d 0:972874f31c98 115 if ( rs == 0 )
iforce2d 0:972874f31c98 116 {
iforce2d 0:972874f31c98 117 /* command */
iforce2d 0:972874f31c98 118 u8g_arduino_st7920_hw_spi_shift_out(u8g, 0x0f8);
iforce2d 0:972874f31c98 119 }
iforce2d 0:972874f31c98 120 else if ( rs == 1 )
iforce2d 0:972874f31c98 121 {
iforce2d 0:972874f31c98 122 /* data */
iforce2d 0:972874f31c98 123 u8g_arduino_st7920_hw_spi_shift_out(u8g, 0x0fa);
iforce2d 0:972874f31c98 124 }
iforce2d 0:972874f31c98 125
iforce2d 0:972874f31c98 126 while( len > 0 )
iforce2d 0:972874f31c98 127 {
iforce2d 0:972874f31c98 128 u8g_arduino_st7920_hw_spi_shift_out(u8g, *ptr & 0x0f0);
iforce2d 0:972874f31c98 129 u8g_arduino_st7920_hw_spi_shift_out(u8g, *ptr << 4);
iforce2d 0:972874f31c98 130 ptr++;
iforce2d 0:972874f31c98 131 len--;
iforce2d 0:972874f31c98 132 u8g_10MicroDelay();
iforce2d 0:972874f31c98 133 }
iforce2d 0:972874f31c98 134
iforce2d 0:972874f31c98 135 for( i = 0; i < 4; i++ )
iforce2d 0:972874f31c98 136 u8g_10MicroDelay();
iforce2d 0:972874f31c98 137 }
iforce2d 0:972874f31c98 138
iforce2d 0:972874f31c98 139 static void u8g_com_arduino_st7920_write_byte_hw_spi(u8g_t *u8g, uint8_t rs, uint8_t val) U8G_NOINLINE;
iforce2d 0:972874f31c98 140 static void u8g_com_arduino_st7920_write_byte_hw_spi(u8g_t *u8g, uint8_t rs, uint8_t val)
iforce2d 0:972874f31c98 141 {
iforce2d 0:972874f31c98 142 uint8_t i;
iforce2d 0:972874f31c98 143
iforce2d 0:972874f31c98 144 if ( rs == 0 )
iforce2d 0:972874f31c98 145 {
iforce2d 0:972874f31c98 146 /* command */
iforce2d 0:972874f31c98 147 u8g_arduino_st7920_hw_spi_shift_out(u8g, 0x0f8);
iforce2d 0:972874f31c98 148 }
iforce2d 0:972874f31c98 149 else if ( rs == 1 )
iforce2d 0:972874f31c98 150 {
iforce2d 0:972874f31c98 151 /* data */
iforce2d 0:972874f31c98 152 u8g_arduino_st7920_hw_spi_shift_out(u8g, 0x0fa);
iforce2d 0:972874f31c98 153 }
iforce2d 0:972874f31c98 154 else
iforce2d 0:972874f31c98 155 {
iforce2d 0:972874f31c98 156 /* do nothing, keep same state */
iforce2d 0:972874f31c98 157 }
iforce2d 0:972874f31c98 158
iforce2d 0:972874f31c98 159 u8g_arduino_st7920_hw_spi_shift_out(u8g, val & 0x0f0);
iforce2d 0:972874f31c98 160 u8g_arduino_st7920_hw_spi_shift_out(u8g, val << 4);
iforce2d 0:972874f31c98 161
iforce2d 0:972874f31c98 162 for( i = 0; i < 4; i++ )
iforce2d 0:972874f31c98 163 u8g_10MicroDelay();
iforce2d 0:972874f31c98 164 }
iforce2d 0:972874f31c98 165
iforce2d 0:972874f31c98 166
iforce2d 0:972874f31c98 167 uint8_t u8g_com_arduino_st7920_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
iforce2d 0:972874f31c98 168 {
iforce2d 0:972874f31c98 169 switch(msg)
iforce2d 0:972874f31c98 170 {
iforce2d 0:972874f31c98 171 case U8G_COM_MSG_INIT:
iforce2d 0:972874f31c98 172 u8g_com_arduino_assign_pin_output_high(u8g);
iforce2d 0:972874f31c98 173
iforce2d 0:972874f31c98 174
iforce2d 0:972874f31c98 175 /* code from u8g_com-arduino_hw_spi.c */
iforce2d 0:972874f31c98 176 pinMode(PIN_SCK, OUTPUT);
iforce2d 0:972874f31c98 177 digitalWrite(PIN_SCK, LOW);
iforce2d 0:972874f31c98 178 pinMode(PIN_MOSI, OUTPUT);
iforce2d 0:972874f31c98 179 digitalWrite(PIN_MOSI, LOW);
iforce2d 0:972874f31c98 180 /* pinMode(PIN_MISO, INPUT); */
iforce2d 0:972874f31c98 181
iforce2d 0:972874f31c98 182 pinMode(PIN_CS, OUTPUT); /* system chip select for the atmega board */
iforce2d 0:972874f31c98 183 digitalWrite(PIN_CS, HIGH);
iforce2d 0:972874f31c98 184
iforce2d 0:972874f31c98 185
iforce2d 0:972874f31c98 186 //u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
iforce2d 0:972874f31c98 187
iforce2d 0:972874f31c98 188 #ifdef OBSOLETE
iforce2d 0:972874f31c98 189 DDRB |= _BV(3); /* D0, MOSI */
iforce2d 0:972874f31c98 190 DDRB |= _BV(5); /* SCK */
iforce2d 0:972874f31c98 191 DDRB |= _BV(2); /* slave select */
iforce2d 0:972874f31c98 192
iforce2d 0:972874f31c98 193 PORTB &= ~_BV(3); /* D0, MOSI = 0 */
iforce2d 0:972874f31c98 194 PORTB &= ~_BV(5); /* SCK = 0 */
iforce2d 0:972874f31c98 195 #endif
iforce2d 0:972874f31c98 196
iforce2d 0:972874f31c98 197 /*
iforce2d 0:972874f31c98 198 SPR1 SPR0
iforce2d 0:972874f31c98 199 0 0 fclk/4
iforce2d 0:972874f31c98 200 0 1 fclk/16
iforce2d 0:972874f31c98 201 1 0 fclk/64
iforce2d 0:972874f31c98 202 1 1 fclk/128
iforce2d 0:972874f31c98 203 */
iforce2d 0:972874f31c98 204 SPCR = 0;
iforce2d 0:972874f31c98 205
iforce2d 0:972874f31c98 206 /* 20 Dez 2012: set CPOL and CPHA to 1 !!! */
iforce2d 0:972874f31c98 207 SPCR = (1<<SPE) | (1<<MSTR)|(0<<SPR1)|(0<<SPR0)|(1<<CPOL)|(1<<CPHA);
iforce2d 0:972874f31c98 208 #ifdef U8G_HW_SPI_2X
iforce2d 0:972874f31c98 209 SPSR = (1 << SPI2X); /* double speed, issue 89 */
iforce2d 0:972874f31c98 210 #endif
iforce2d 0:972874f31c98 211 u8g->pin_list[U8G_PI_A0_STATE] = 0; /* inital RS state: command mode */
iforce2d 0:972874f31c98 212 break;
iforce2d 0:972874f31c98 213
iforce2d 0:972874f31c98 214 case U8G_COM_MSG_STOP:
iforce2d 0:972874f31c98 215 break;
iforce2d 0:972874f31c98 216
iforce2d 0:972874f31c98 217 case U8G_COM_MSG_RESET:
iforce2d 0:972874f31c98 218 if ( u8g->pin_list[U8G_PI_RESET] != U8G_PIN_NONE )
iforce2d 0:972874f31c98 219 u8g_com_arduino_digital_write(u8g, U8G_PI_RESET, arg_val);
iforce2d 0:972874f31c98 220 break;
iforce2d 0:972874f31c98 221
iforce2d 0:972874f31c98 222 case U8G_COM_MSG_CHIP_SELECT:
iforce2d 0:972874f31c98 223 if ( arg_val == 0 )
iforce2d 0:972874f31c98 224 {
iforce2d 0:972874f31c98 225 /* disable, note: the st7920 has an active high chip select */
iforce2d 0:972874f31c98 226 u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
iforce2d 0:972874f31c98 227 }
iforce2d 0:972874f31c98 228 else
iforce2d 0:972874f31c98 229 {
iforce2d 0:972874f31c98 230 /* enable */
iforce2d 0:972874f31c98 231 //u8g_com_arduino_digital_write(u8g, U8G_PI_SCK, LOW);
iforce2d 0:972874f31c98 232 u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH);
iforce2d 0:972874f31c98 233 }
iforce2d 0:972874f31c98 234 break;
iforce2d 0:972874f31c98 235
iforce2d 0:972874f31c98 236 case U8G_COM_MSG_WRITE_BYTE:
iforce2d 0:972874f31c98 237 u8g_com_arduino_st7920_write_byte_hw_spi(u8g, u8g->pin_list[U8G_PI_A0_STATE], arg_val);
iforce2d 0:972874f31c98 238 // u8g->pin_list[U8G_PI_A0_STATE] = 2;
iforce2d 0:972874f31c98 239 //u8g_arduino_sw_spi_shift_out(u8g->pin_list[U8G_PI_MOSI], u8g->pin_list[U8G_PI_SCK], arg_val);
iforce2d 0:972874f31c98 240 break;
iforce2d 0:972874f31c98 241
iforce2d 0:972874f31c98 242 case U8G_COM_MSG_WRITE_SEQ:
iforce2d 0:972874f31c98 243 u8g_com_arduino_st7920_write_byte_hw_spi_seq(u8g, u8g->pin_list[U8G_PI_A0_STATE], (uint8_t *)arg_ptr, arg_val);
iforce2d 0:972874f31c98 244 /*
iforce2d 0:972874f31c98 245 {
iforce2d 0:972874f31c98 246 register uint8_t *ptr = arg_ptr;
iforce2d 0:972874f31c98 247 while( arg_val > 0 )
iforce2d 0:972874f31c98 248 {
iforce2d 0:972874f31c98 249 u8g_com_arduino_st7920_write_byte_hw_spi(u8g, u8g->pin_list[U8G_PI_A0_STATE], *ptr++);
iforce2d 0:972874f31c98 250 arg_val--;
iforce2d 0:972874f31c98 251 }
iforce2d 0:972874f31c98 252 }
iforce2d 0:972874f31c98 253 */
iforce2d 0:972874f31c98 254
iforce2d 0:972874f31c98 255 break;
iforce2d 0:972874f31c98 256
iforce2d 0:972874f31c98 257 case U8G_COM_MSG_WRITE_SEQ_P:
iforce2d 0:972874f31c98 258 {
iforce2d 0:972874f31c98 259 register uint8_t *ptr = arg_ptr;
iforce2d 0:972874f31c98 260 while( arg_val > 0 )
iforce2d 0:972874f31c98 261 {
iforce2d 0:972874f31c98 262 u8g_com_arduino_st7920_write_byte_hw_spi(u8g, u8g->pin_list[U8G_PI_A0_STATE], u8g_pgm_read(ptr) );
iforce2d 0:972874f31c98 263 // u8g->pin_list[U8G_PI_A0_STATE] = 2;
iforce2d 0:972874f31c98 264 ptr++;
iforce2d 0:972874f31c98 265 arg_val--;
iforce2d 0:972874f31c98 266 }
iforce2d 0:972874f31c98 267 }
iforce2d 0:972874f31c98 268 break;
iforce2d 0:972874f31c98 269
iforce2d 0:972874f31c98 270 case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
iforce2d 0:972874f31c98 271 u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
iforce2d 0:972874f31c98 272 break;
iforce2d 0:972874f31c98 273 }
iforce2d 0:972874f31c98 274 return 1;
iforce2d 0:972874f31c98 275 }
iforce2d 0:972874f31c98 276
iforce2d 0:972874f31c98 277 #else
iforce2d 0:972874f31c98 278
iforce2d 0:972874f31c98 279 uint8_t u8g_com_arduino_st7920_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
iforce2d 0:972874f31c98 280 {
iforce2d 0:972874f31c98 281 return 1;
iforce2d 0:972874f31c98 282 }
iforce2d 0:972874f31c98 283 #endif
iforce2d 0:972874f31c98 284
iforce2d 0:972874f31c98 285 #else /* ARDUINO */
iforce2d 0:972874f31c98 286
iforce2d 0:972874f31c98 287 uint8_t u8g_com_arduino_st7920_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
iforce2d 0:972874f31c98 288 {
iforce2d 0:972874f31c98 289 return 1;
iforce2d 0:972874f31c98 290 }
iforce2d 0:972874f31c98 291
iforce2d 0:972874f31c98 292 #endif /* ARDUINO */
iforce2d 0:972874f31c98 293
iforce2d 0:972874f31c98 294