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1 /* |
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2 |
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3 u8x8_setup.c |
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4 |
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5 Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/) |
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6 |
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7 Copyright (c) 2016, olikraus@gmail.com |
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8 All rights reserved. |
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9 |
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10 Redistribution and use in source and binary forms, with or without modification, |
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11 are permitted provided that the following conditions are met: |
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12 |
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13 * Redistributions of source code must retain the above copyright notice, this list |
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14 of conditions and the following disclaimer. |
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15 |
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16 * Redistributions in binary form must reproduce the above copyright notice, this |
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17 list of conditions and the following disclaimer in the documentation and/or other |
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18 materials provided with the distribution. |
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19 |
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20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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21 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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22 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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23 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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24 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
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25 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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27 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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28 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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29 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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30 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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31 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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32 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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33 |
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34 */ |
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35 |
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36 |
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37 #include "u8x8.h" |
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38 |
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39 /* universal dummy callback, which will be default for all callbacks */ |
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40 uint8_t u8x8_dummy_cb(U8X8_UNUSED u8x8_t *u8x8, U8X8_UNUSED uint8_t msg, U8X8_UNUSED uint8_t arg_int, U8X8_UNUSED void *arg_ptr) |
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41 { |
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42 /* the dummy callback will not handle any message and will fail for all messages */ |
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43 return 0; |
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44 } |
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45 |
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46 |
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47 static const u8x8_display_info_t u8x8_null_display_info = |
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48 { |
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49 /* chip_enable_level = */ 0, |
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50 /* chip_disable_level = */ 1, |
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51 |
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52 /* post_chip_enable_wait_ns = */ 0, |
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53 /* pre_chip_disable_wait_ns = */ 0, |
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54 /* reset_pulse_width_ms = */ 0, |
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55 /* post_reset_wait_ms = */ 0, |
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56 /* sda_setup_time_ns = */ 0, |
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57 /* sck_pulse_width_ns = */ 0, /* half of cycle time (100ns according to datasheet), AVR: below 70: 8 MHz, >= 70 --> 4MHz clock */ |
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58 /* sck_clock_hz = */ 4000000UL, /* since Arduino 1.6.0, the SPI bus speed in Hz. Should be 1000000000/sck_pulse_width_ns */ |
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59 /* spi_mode = */ 0, /* active high, rising edge */ |
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60 /* i2c_bus_clock_100kHz = */ 4, |
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61 /* data_setup_time_ns = */ 0, |
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62 /* write_pulse_width_ns = */ 0, |
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63 /* tile_width = */ 1, /* 8x8 */ |
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64 /* tile_hight = */ 1, |
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65 /* default_x_offset = */ 0, |
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66 /* flipmode_x_offset = */ 0, |
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67 /* pixel_width = */ 8, |
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68 /* pixel_height = */ 8 |
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69 }; |
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70 |
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71 |
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72 /* a special null device */ |
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73 uint8_t u8x8_d_null_cb(u8x8_t *u8x8, uint8_t msg, U8X8_UNUSED uint8_t arg_int, U8X8_UNUSED void *arg_ptr) |
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74 { |
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75 switch(msg) |
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76 { |
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77 case U8X8_MSG_DISPLAY_SETUP_MEMORY: |
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78 u8x8_d_helper_display_setup_memory(u8x8, &u8x8_null_display_info); |
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79 break; |
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80 case U8X8_MSG_DISPLAY_INIT: |
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81 u8x8_d_helper_display_init(u8x8); |
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82 break; |
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83 } |
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84 /* the null device callback will succeed for all messages */ |
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85 return 1; |
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86 } |
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87 |
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88 |
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89 /* |
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90 Description: |
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91 Setup u8x8 |
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92 Args: |
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93 u8x8 An empty u8x8 structure |
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94 */ |
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95 void u8x8_SetupDefaults(u8x8_t *u8x8) |
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96 { |
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97 u8x8->display_info = NULL; |
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98 u8x8->display_cb = u8x8_dummy_cb; |
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99 u8x8->cad_cb = u8x8_dummy_cb; |
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100 u8x8->byte_cb = u8x8_dummy_cb; |
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101 u8x8->gpio_and_delay_cb = u8x8_dummy_cb; |
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102 u8x8->is_font_inverse_mode = 0; |
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103 u8x8->device_address = 0; |
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104 u8x8->utf8_state = 0; /* also reset by u8x8_utf8_init */ |
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105 u8x8->bus_clock = 0; /* issue 769 */ |
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106 u8x8->i2c_address = 255; |
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107 u8x8->debounce_default_pin_state = 255; /* assume all low active buttons */ |
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108 |
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109 #ifdef U8X8_USE_PINS |
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110 { |
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111 uint8_t i; |
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112 for( i = 0; i < U8X8_PIN_CNT; i++ ) |
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113 u8x8->pins[i] = U8X8_PIN_NONE; |
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114 } |
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115 #endif |
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116 } |
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117 |
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118 |
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119 /* |
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120 Description: |
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121 Setup u8x8 and assign the callback function. The dummy |
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122 callback "u8x8_dummy_cb" can be used, if no callback is required. |
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123 This setup will not communicate with the display itself. |
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124 Use u8x8_InitDisplay() to send the startup code to the Display. |
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125 Args: |
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126 u8x8 An empty u8x8 structure |
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127 display_cb Display/controller specific callback function |
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128 cad_cb Display controller specific communication callback function |
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129 byte_cb Display controller/communication specific callback funtion |
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130 gpio_and_delay_cb Environment specific callback function |
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131 |
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132 */ |
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133 void u8x8_Setup(u8x8_t *u8x8, u8x8_msg_cb display_cb, u8x8_msg_cb cad_cb, u8x8_msg_cb byte_cb, u8x8_msg_cb gpio_and_delay_cb) |
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134 { |
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135 /* setup defaults and reset pins to U8X8_PIN_NONE */ |
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136 u8x8_SetupDefaults(u8x8); |
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137 |
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138 /* setup specific callbacks */ |
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139 u8x8->display_cb = display_cb; |
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140 u8x8->cad_cb = cad_cb; |
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141 u8x8->byte_cb = byte_cb; |
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142 u8x8->gpio_and_delay_cb = gpio_and_delay_cb; |
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143 |
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144 /* setup display info */ |
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145 u8x8_SetupMemory(u8x8); |
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146 } |
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147 |