iforce2d Chris / Mbed 2 deprecated ubxDistanceMeter

Displays distance to start location on OLED screen.

Dependencies:   mbed

u8g_state.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_state.c
iforce2d 0:972874f31c98 4
iforce2d 0:972874f31c98 5 backup and restore hardware state
iforce2d 0:972874f31c98 6
iforce2d 0:972874f31c98 7 Universal 8bit Graphics Library
iforce2d 0:972874f31c98 8
iforce2d 0:972874f31c98 9 Copyright (c) 2011, olikraus@gmail.com
iforce2d 0:972874f31c98 10 All rights reserved.
iforce2d 0:972874f31c98 11
iforce2d 0:972874f31c98 12 Redistribution and use in source and binary forms, with or without modification,
iforce2d 0:972874f31c98 13 are permitted provided that the following conditions are met:
iforce2d 0:972874f31c98 14
iforce2d 0:972874f31c98 15 * Redistributions of source code must retain the above copyright notice, this list
iforce2d 0:972874f31c98 16 of conditions and the following disclaimer.
iforce2d 0:972874f31c98 17
iforce2d 0:972874f31c98 18 * Redistributions in binary form must reproduce the above copyright notice, this
iforce2d 0:972874f31c98 19 list of conditions and the following disclaimer in the documentation and/or other
iforce2d 0:972874f31c98 20 materials provided with the distribution.
iforce2d 0:972874f31c98 21
iforce2d 0:972874f31c98 22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
iforce2d 0:972874f31c98 23 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
iforce2d 0:972874f31c98 24 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
iforce2d 0:972874f31c98 25 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
iforce2d 0:972874f31c98 26 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
iforce2d 0:972874f31c98 27 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
iforce2d 0:972874f31c98 28 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
iforce2d 0:972874f31c98 29 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
iforce2d 0:972874f31c98 30 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
iforce2d 0:972874f31c98 31 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
iforce2d 0:972874f31c98 32 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
iforce2d 0:972874f31c98 33 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
iforce2d 0:972874f31c98 34 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
iforce2d 0:972874f31c98 35
iforce2d 0:972874f31c98 36
iforce2d 0:972874f31c98 37 state callback: backup env U8G_STATE_MSG_BACKUP_ENV
iforce2d 0:972874f31c98 38 device callback: DEV_MSG_INIT
iforce2d 0:972874f31c98 39 state callback: backup u8g U8G_STATE_MSG_BACKUP_U8G
iforce2d 0:972874f31c98 40 state callback: restore env U8G_STATE_MSG_RESTORE_ENV
iforce2d 0:972874f31c98 41
iforce2d 0:972874f31c98 42 state callback: backup env U8G_STATE_MSG_BACKUP_ENV
iforce2d 0:972874f31c98 43 state callback: retore u8g U8G_STATE_MSG_RESTORE_U8G
iforce2d 0:972874f31c98 44 DEV_MSG_PAGE_FIRST or DEV_MSG_PAGE_NEXT
iforce2d 0:972874f31c98 45 state callback: restore env U8G_STATE_MSG_RESTORE_ENV
iforce2d 0:972874f31c98 46
iforce2d 0:972874f31c98 47 */
iforce2d 0:972874f31c98 48
iforce2d 0:972874f31c98 49 #include <stddef.h>
iforce2d 0:972874f31c98 50 #include "u8g.h"
iforce2d 0:972874f31c98 51
iforce2d 0:972874f31c98 52 void u8g_state_dummy_cb(uint8_t msg)
iforce2d 0:972874f31c98 53 {
iforce2d 0:972874f31c98 54 /* the dummy procedure does nothing */
iforce2d 0:972874f31c98 55 }
iforce2d 0:972874f31c98 56
iforce2d 0:972874f31c98 57 void u8g_SetHardwareBackup(u8g_t *u8g, u8g_state_cb backup_cb)
iforce2d 0:972874f31c98 58 {
iforce2d 0:972874f31c98 59 u8g->state_cb = backup_cb;
iforce2d 0:972874f31c98 60 /* in most cases the init message was already sent, so this will backup the */
iforce2d 0:972874f31c98 61 /* current u8g state */
iforce2d 0:972874f31c98 62 backup_cb(U8G_STATE_MSG_BACKUP_U8G);
iforce2d 0:972874f31c98 63 }
iforce2d 0:972874f31c98 64
iforce2d 0:972874f31c98 65
iforce2d 0:972874f31c98 66 /*===============================================================*/
iforce2d 0:972874f31c98 67 /* register variable for restoring interrupt state */
iforce2d 0:972874f31c98 68
iforce2d 0:972874f31c98 69 #if defined(__AVR__)
iforce2d 0:972874f31c98 70 uint8_t global_SREG_backup;
iforce2d 0:972874f31c98 71 #endif
iforce2d 0:972874f31c98 72
iforce2d 0:972874f31c98 73
iforce2d 0:972874f31c98 74
iforce2d 0:972874f31c98 75 /*===============================================================*/
iforce2d 0:972874f31c98 76 /* AVR */
iforce2d 0:972874f31c98 77
iforce2d 0:972874f31c98 78 #if defined(__AVR__)
iforce2d 0:972874f31c98 79 #define U8G_ATMEGA_HW_SPI
iforce2d 0:972874f31c98 80
iforce2d 0:972874f31c98 81 /* remove the definition for attiny */
iforce2d 0:972874f31c98 82 #if __AVR_ARCH__ == 2
iforce2d 0:972874f31c98 83 #undef U8G_ATMEGA_HW_SPI
iforce2d 0:972874f31c98 84 #endif
iforce2d 0:972874f31c98 85 #if __AVR_ARCH__ == 25
iforce2d 0:972874f31c98 86 #undef U8G_ATMEGA_HW_SPI
iforce2d 0:972874f31c98 87 #endif
iforce2d 0:972874f31c98 88 #endif
iforce2d 0:972874f31c98 89
iforce2d 0:972874f31c98 90 #if defined(U8G_ATMEGA_HW_SPI)
iforce2d 0:972874f31c98 91 #include <avr/interrupt.h>
iforce2d 0:972874f31c98 92 static uint8_t u8g_state_avr_spi_memory[2];
iforce2d 0:972874f31c98 93
iforce2d 0:972874f31c98 94 void u8g_backup_spi(uint8_t msg)
iforce2d 0:972874f31c98 95 {
iforce2d 0:972874f31c98 96 if ( U8G_STATE_MSG_IS_BACKUP(msg) )
iforce2d 0:972874f31c98 97 {
iforce2d 0:972874f31c98 98 u8g_state_avr_spi_memory[U8G_STATE_MSG_GET_IDX(msg)] = SPCR;
iforce2d 0:972874f31c98 99 }
iforce2d 0:972874f31c98 100 else
iforce2d 0:972874f31c98 101 {
iforce2d 0:972874f31c98 102 uint8_t tmp = SREG;
iforce2d 0:972874f31c98 103 cli();
iforce2d 0:972874f31c98 104 SPCR = 0;
iforce2d 0:972874f31c98 105 SPCR = u8g_state_avr_spi_memory[U8G_STATE_MSG_GET_IDX(msg)];
iforce2d 0:972874f31c98 106 SREG = tmp;
iforce2d 0:972874f31c98 107 }
iforce2d 0:972874f31c98 108 }
iforce2d 0:972874f31c98 109
iforce2d 0:972874f31c98 110 #elif defined(ARDUINO) && defined(__arm__) // Arduino Due, maybe we should better check for __SAM3X8E__
iforce2d 0:972874f31c98 111
iforce2d 0:972874f31c98 112 #include "sam.h"
iforce2d 0:972874f31c98 113
iforce2d 0:972874f31c98 114 struct sam_backup_struct
iforce2d 0:972874f31c98 115 {
iforce2d 0:972874f31c98 116 uint32_t mr;
iforce2d 0:972874f31c98 117 uint32_t sr;
iforce2d 0:972874f31c98 118 uint32_t csr[4];
iforce2d 0:972874f31c98 119 } sam_backup[2];
iforce2d 0:972874f31c98 120
iforce2d 0:972874f31c98 121 void u8g_backup_spi(uint8_t msg)
iforce2d 0:972874f31c98 122 {
iforce2d 0:972874f31c98 123 uint8_t idx = U8G_STATE_MSG_GET_IDX(msg);
iforce2d 0:972874f31c98 124 if ( U8G_STATE_MSG_IS_BACKUP(msg) )
iforce2d 0:972874f31c98 125 {
iforce2d 0:972874f31c98 126 sam_backup[idx].mr = SPI0->SPI_MR;
iforce2d 0:972874f31c98 127 sam_backup[idx].sr = SPI0->SPI_SR;
iforce2d 0:972874f31c98 128 sam_backup[idx].csr[0] = SPI0->SPI_CSR[0];
iforce2d 0:972874f31c98 129 sam_backup[idx].csr[1] = SPI0->SPI_CSR[1];
iforce2d 0:972874f31c98 130 sam_backup[idx].csr[2] = SPI0->SPI_CSR[2];
iforce2d 0:972874f31c98 131 sam_backup[idx].csr[3] = SPI0->SPI_CSR[3];
iforce2d 0:972874f31c98 132 }
iforce2d 0:972874f31c98 133 else
iforce2d 0:972874f31c98 134 {
iforce2d 0:972874f31c98 135 SPI0->SPI_MR = sam_backup[idx].mr;
iforce2d 0:972874f31c98 136 SPI0->SPI_CSR[0] = sam_backup[idx].csr[0];
iforce2d 0:972874f31c98 137 SPI0->SPI_CSR[1] = sam_backup[idx].csr[1];
iforce2d 0:972874f31c98 138 SPI0->SPI_CSR[2] = sam_backup[idx].csr[2];
iforce2d 0:972874f31c98 139 SPI0->SPI_CSR[3] = sam_backup[idx].csr[3];
iforce2d 0:972874f31c98 140 }
iforce2d 0:972874f31c98 141 }
iforce2d 0:972874f31c98 142
iforce2d 0:972874f31c98 143 #else
iforce2d 0:972874f31c98 144
iforce2d 0:972874f31c98 145 void u8g_backup_spi(uint8_t msg)
iforce2d 0:972874f31c98 146 {
iforce2d 0:972874f31c98 147 }
iforce2d 0:972874f31c98 148
iforce2d 0:972874f31c98 149 #endif
iforce2d 0:972874f31c98 150
iforce2d 0:972874f31c98 151