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Dependencies:   mbed Blynk

u8glibARM/u8g_state.c@0:d8f4c441e032, 2016-06-10 (annotated)

Committer:
lixianyu
Date:
Fri Jun 10 15:20:20 2016 +0000
Revision:
0:d8f4c441e032
u8glib???????????i2c???

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lixianyu 0:d8f4c441e032 1 /*
lixianyu 0:d8f4c441e032 2
lixianyu 0:d8f4c441e032 3 u8g_state.c
lixianyu 0:d8f4c441e032 4
lixianyu 0:d8f4c441e032 5 backup and restore hardware state
lixianyu 0:d8f4c441e032 6
lixianyu 0:d8f4c441e032 7 Universal 8bit Graphics Library
lixianyu 0:d8f4c441e032 8
lixianyu 0:d8f4c441e032 9 Copyright (c) 2011, olikraus@gmail.com
lixianyu 0:d8f4c441e032 10 All rights reserved.
lixianyu 0:d8f4c441e032 11
lixianyu 0:d8f4c441e032 12 Redistribution and use in source and binary forms, with or without modification,
lixianyu 0:d8f4c441e032 13 are permitted provided that the following conditions are met:
lixianyu 0:d8f4c441e032 14
lixianyu 0:d8f4c441e032 15 * Redistributions of source code must retain the above copyright notice, this list
lixianyu 0:d8f4c441e032 16 of conditions and the following disclaimer.
lixianyu 0:d8f4c441e032 17
lixianyu 0:d8f4c441e032 18 * Redistributions in binary form must reproduce the above copyright notice, this
lixianyu 0:d8f4c441e032 19 list of conditions and the following disclaimer in the documentation and/or other
lixianyu 0:d8f4c441e032 20 materials provided with the distribution.
lixianyu 0:d8f4c441e032 21
lixianyu 0:d8f4c441e032 22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
lixianyu 0:d8f4c441e032 23 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
lixianyu 0:d8f4c441e032 24 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
lixianyu 0:d8f4c441e032 25 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
lixianyu 0:d8f4c441e032 26 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
lixianyu 0:d8f4c441e032 27 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
lixianyu 0:d8f4c441e032 28 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
lixianyu 0:d8f4c441e032 29 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
lixianyu 0:d8f4c441e032 30 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
lixianyu 0:d8f4c441e032 31 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
lixianyu 0:d8f4c441e032 32 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
lixianyu 0:d8f4c441e032 33 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
lixianyu 0:d8f4c441e032 34 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
lixianyu 0:d8f4c441e032 35
lixianyu 0:d8f4c441e032 36
lixianyu 0:d8f4c441e032 37 state callback: backup env U8G_STATE_MSG_BACKUP_ENV
lixianyu 0:d8f4c441e032 38 device callback: DEV_MSG_INIT
lixianyu 0:d8f4c441e032 39 state callback: backup u8g U8G_STATE_MSG_BACKUP_U8G
lixianyu 0:d8f4c441e032 40 state callback: restore env U8G_STATE_MSG_RESTORE_ENV
lixianyu 0:d8f4c441e032 41
lixianyu 0:d8f4c441e032 42 state callback: backup env U8G_STATE_MSG_BACKUP_ENV
lixianyu 0:d8f4c441e032 43 state callback: retore u8g U8G_STATE_MSG_RESTORE_U8G
lixianyu 0:d8f4c441e032 44 DEV_MSG_PAGE_FIRST or DEV_MSG_PAGE_NEXT
lixianyu 0:d8f4c441e032 45 state callback: restore env U8G_STATE_MSG_RESTORE_ENV
lixianyu 0:d8f4c441e032 46
lixianyu 0:d8f4c441e032 47 */
lixianyu 0:d8f4c441e032 48
lixianyu 0:d8f4c441e032 49 #include <stddef.h>
lixianyu 0:d8f4c441e032 50 #include "u8g.h"
lixianyu 0:d8f4c441e032 51
lixianyu 0:d8f4c441e032 52 void u8g_state_dummy_cb(uint8_t msg)
lixianyu 0:d8f4c441e032 53 {
lixianyu 0:d8f4c441e032 54 /* the dummy procedure does nothing */
lixianyu 0:d8f4c441e032 55 }
lixianyu 0:d8f4c441e032 56
lixianyu 0:d8f4c441e032 57 void u8g_SetHardwareBackup(u8g_t *u8g, u8g_state_cb backup_cb)
lixianyu 0:d8f4c441e032 58 {
lixianyu 0:d8f4c441e032 59 u8g->state_cb = backup_cb;
lixianyu 0:d8f4c441e032 60 /* in most cases the init message was already sent, so this will backup the */
lixianyu 0:d8f4c441e032 61 /* current u8g state */
lixianyu 0:d8f4c441e032 62 backup_cb(U8G_STATE_MSG_BACKUP_U8G);
lixianyu 0:d8f4c441e032 63 }
lixianyu 0:d8f4c441e032 64
lixianyu 0:d8f4c441e032 65
lixianyu 0:d8f4c441e032 66 /*===============================================================*/
lixianyu 0:d8f4c441e032 67 /* register variable for restoring interrupt state */
lixianyu 0:d8f4c441e032 68
lixianyu 0:d8f4c441e032 69 #if defined(__AVR__)
lixianyu 0:d8f4c441e032 70 uint8_t global_SREG_backup;
lixianyu 0:d8f4c441e032 71 #endif
lixianyu 0:d8f4c441e032 72
lixianyu 0:d8f4c441e032 73
lixianyu 0:d8f4c441e032 74
lixianyu 0:d8f4c441e032 75 /*===============================================================*/
lixianyu 0:d8f4c441e032 76 /* AVR */
lixianyu 0:d8f4c441e032 77
lixianyu 0:d8f4c441e032 78 #if defined(__AVR__)
lixianyu 0:d8f4c441e032 79 #define U8G_ATMEGA_HW_SPI
lixianyu 0:d8f4c441e032 80
lixianyu 0:d8f4c441e032 81 /* remove the definition for attiny */
lixianyu 0:d8f4c441e032 82 #if __AVR_ARCH__ == 2
lixianyu 0:d8f4c441e032 83 #undef U8G_ATMEGA_HW_SPI
lixianyu 0:d8f4c441e032 84 #endif
lixianyu 0:d8f4c441e032 85 #if __AVR_ARCH__ == 25
lixianyu 0:d8f4c441e032 86 #undef U8G_ATMEGA_HW_SPI
lixianyu 0:d8f4c441e032 87 #endif
lixianyu 0:d8f4c441e032 88 #endif
lixianyu 0:d8f4c441e032 89
lixianyu 0:d8f4c441e032 90 #if defined(U8G_ATMEGA_HW_SPI)
lixianyu 0:d8f4c441e032 91 #include <avr/interrupt.h>
lixianyu 0:d8f4c441e032 92 static uint8_t u8g_state_avr_spi_memory[2];
lixianyu 0:d8f4c441e032 93
lixianyu 0:d8f4c441e032 94 void u8g_backup_spi(uint8_t msg)
lixianyu 0:d8f4c441e032 95 {
lixianyu 0:d8f4c441e032 96 if ( U8G_STATE_MSG_IS_BACKUP(msg) )
lixianyu 0:d8f4c441e032 97 {
lixianyu 0:d8f4c441e032 98 u8g_state_avr_spi_memory[U8G_STATE_MSG_GET_IDX(msg)] = SPCR;
lixianyu 0:d8f4c441e032 99 }
lixianyu 0:d8f4c441e032 100 else
lixianyu 0:d8f4c441e032 101 {
lixianyu 0:d8f4c441e032 102 uint8_t tmp = SREG;
lixianyu 0:d8f4c441e032 103 cli();
lixianyu 0:d8f4c441e032 104 SPCR = 0;
lixianyu 0:d8f4c441e032 105 SPCR = u8g_state_avr_spi_memory[U8G_STATE_MSG_GET_IDX(msg)];
lixianyu 0:d8f4c441e032 106 SREG = tmp;
lixianyu 0:d8f4c441e032 107 }
lixianyu 0:d8f4c441e032 108 }
lixianyu 0:d8f4c441e032 109
lixianyu 0:d8f4c441e032 110 #elif defined (U8G_RASPBERRY_PI)
lixianyu 0:d8f4c441e032 111
lixianyu 0:d8f4c441e032 112 #include <stdio.h>
lixianyu 0:d8f4c441e032 113
lixianyu 0:d8f4c441e032 114 void u8g_backup_spi(uint8_t msg) {
lixianyu 0:d8f4c441e032 115 printf("u8g_backup_spi %d\r\n",msg);
lixianyu 0:d8f4c441e032 116 }
lixianyu 0:d8f4c441e032 117
lixianyu 0:d8f4c441e032 118 #elif defined(ARDUINO) && defined(__SAM3X8E__) // Arduino Due, maybe we should better check for __SAM3X8E__
lixianyu 0:d8f4c441e032 119
lixianyu 0:d8f4c441e032 120 #include "sam.h"
lixianyu 0:d8f4c441e032 121
lixianyu 0:d8f4c441e032 122 struct sam_backup_struct
lixianyu 0:d8f4c441e032 123 {
lixianyu 0:d8f4c441e032 124 uint32_t mr;
lixianyu 0:d8f4c441e032 125 uint32_t sr;
lixianyu 0:d8f4c441e032 126 uint32_t csr[4];
lixianyu 0:d8f4c441e032 127 } sam_backup[2];
lixianyu 0:d8f4c441e032 128
lixianyu 0:d8f4c441e032 129 void u8g_backup_spi(uint8_t msg)
lixianyu 0:d8f4c441e032 130 {
lixianyu 0:d8f4c441e032 131 uint8_t idx = U8G_STATE_MSG_GET_IDX(msg);
lixianyu 0:d8f4c441e032 132 if ( U8G_STATE_MSG_IS_BACKUP(msg) )
lixianyu 0:d8f4c441e032 133 {
lixianyu 0:d8f4c441e032 134 sam_backup[idx].mr = SPI0->SPI_MR;
lixianyu 0:d8f4c441e032 135 sam_backup[idx].sr = SPI0->SPI_SR;
lixianyu 0:d8f4c441e032 136 sam_backup[idx].csr[0] = SPI0->SPI_CSR[0];
lixianyu 0:d8f4c441e032 137 sam_backup[idx].csr[1] = SPI0->SPI_CSR[1];
lixianyu 0:d8f4c441e032 138 sam_backup[idx].csr[2] = SPI0->SPI_CSR[2];
lixianyu 0:d8f4c441e032 139 sam_backup[idx].csr[3] = SPI0->SPI_CSR[3];
lixianyu 0:d8f4c441e032 140 }
lixianyu 0:d8f4c441e032 141 else
lixianyu 0:d8f4c441e032 142 {
lixianyu 0:d8f4c441e032 143 SPI0->SPI_MR = sam_backup[idx].mr;
lixianyu 0:d8f4c441e032 144 SPI0->SPI_CSR[0] = sam_backup[idx].csr[0];
lixianyu 0:d8f4c441e032 145 SPI0->SPI_CSR[1] = sam_backup[idx].csr[1];
lixianyu 0:d8f4c441e032 146 SPI0->SPI_CSR[2] = sam_backup[idx].csr[2];
lixianyu 0:d8f4c441e032 147 SPI0->SPI_CSR[3] = sam_backup[idx].csr[3];
lixianyu 0:d8f4c441e032 148 }
lixianyu 0:d8f4c441e032 149 }
lixianyu 0:d8f4c441e032 150
lixianyu 0:d8f4c441e032 151 #else
lixianyu 0:d8f4c441e032 152
lixianyu 0:d8f4c441e032 153 void u8g_backup_spi(uint8_t msg)
lixianyu 0:d8f4c441e032 154 {
lixianyu 0:d8f4c441e032 155 }
lixianyu 0:d8f4c441e032 156
lixianyu 0:d8f4c441e032 157 #endif
lixianyu 0:d8f4c441e032 158
lixianyu 0:d8f4c441e032 159