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1 | /**************************************************************************** |
1 | /**************************************************************************** |
2 | * Copyright (C) 2009 by Claas Anders "CaScAdE" Rathje * |
2 | * Copyright (C) 2009 by Claas Anders "CaScAdE" Rathje * |
3 | * admiralcascade@gmail.com * |
3 | * admiralcascade@gmail.com * |
4 | * Project-URL: http://www.mylifesucks.de/oss/c-osd/ * |
4 | * Project-URL: http://www.mylifesucks.de/oss/c-osd/ * |
5 | * * |
5 | * * |
6 | * This program is free software; you can redistribute it and/or modify * |
6 | * This program is free software; you can redistribute it and/or modify * |
7 | * it under the terms of the GNU General Public License as published by * |
7 | * it under the terms of the GNU General Public License as published by * |
8 | * the Free Software Foundation; either version 2 of the License. * |
8 | * the Free Software Foundation; either version 2 of the License. * |
9 | * * |
9 | * * |
10 | * This program is distributed in the hope that it will be useful, * |
10 | * This program is distributed in the hope that it will be useful, * |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
13 | * GNU General Public License for more details. * |
13 | * GNU General Public License for more details. * |
14 | * * |
14 | * * |
15 | * You should have received a copy of the GNU General Public License * |
15 | * You should have received a copy of the GNU General Public License * |
16 | * along with this program; if not, write to the * |
16 | * along with this program; if not, write to the * |
17 | * Free Software Foundation, Inc., * |
17 | * Free Software Foundation, Inc., * |
18 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
18 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
19 | ****************************************************************************/ |
19 | ****************************************************************************/ |
20 | 20 | ||
21 | #include <avr/io.h> |
21 | #include <avr/io.h> |
22 | #include <util/delay.h> |
22 | #include <util/delay.h> |
23 | #include <avr/pgmspace.h> |
23 | #include <avr/pgmspace.h> |
24 | #include "max7456_software_spi.h" |
24 | #include "max7456_software_spi.h" |
25 | 25 | ||
26 | /* ########################################################################## |
26 | /* ########################################################################## |
27 | * MAX7456 SPI & Display stuff |
27 | * MAX7456 SPI & Display stuff |
28 | * ##########################################################################*/ |
28 | * ##########################################################################*/ |
29 | 29 | ||
30 | /** |
30 | /** |
31 | * Send a byte through SPI |
31 | * Send a byte through SPI |
32 | */ |
32 | */ |
33 | void spi_send(uint8_t byte) { |
33 | void spi_send(uint8_t byte) { |
34 | for (int8_t i = 7; i >= 0; i--) { |
34 | for (int8_t i = 7; i >= 0; i--) { |
35 | if (((byte >> i) & 1)) { |
35 | if (((byte >> i) & 1)) { |
36 | MAX_SDIN_HIGH |
36 | MAX_SDIN_HIGH |
37 | } else { |
37 | } else { |
38 | MAX_SDIN_LOW |
38 | MAX_SDIN_LOW |
39 | } |
39 | } |
40 | MAX_SCLK_HIGH |
40 | MAX_SCLK_HIGH |
41 | MAX_SCLK_LOW |
41 | MAX_SCLK_LOW |
42 | } |
42 | } |
43 | } |
43 | } |
44 | 44 | ||
45 | /** |
45 | /** |
46 | * Send <byte> to <address> of MAX7456 |
46 | * Send <byte> to <address> of MAX7456 |
47 | */ |
47 | */ |
48 | void spi_send_byte(uint8_t address, uint8_t byte) { |
48 | void spi_send_byte(uint8_t address, uint8_t byte) { |
49 | // start sending |
49 | // start sending |
50 | MAX_CS_LOW |
50 | MAX_CS_LOW |
51 | 51 | ||
52 | spi_send(address); |
52 | spi_send(address); |
53 | spi_send(byte); |
53 | spi_send(byte); |
54 | 54 | ||
55 | // end sending |
55 | // end sending |
56 | MAX_CS_HIGH |
56 | MAX_CS_HIGH |
57 | } |
57 | } |
58 | 58 | ||
59 | /** |
59 | /** |
60 | * write a <character> to <address> of MAX7456 display memory |
60 | * write a <character> to <address> of MAX7456 display memory |
61 | */ |
61 | */ |
62 | void write_char(uint16_t address, char character) { |
62 | void write_char(uint16_t address, char character) { |
63 | spi_send_byte(0x05, (address & 0xFF00) >> 8); // DMAH |
63 | spi_send_byte(0x05, (address & 0xFF00) >> 8); // DMAH |
64 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
64 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
65 | spi_send_byte(0x07, character); // DMDI |
65 | spi_send_byte(0x07, character); // DMDI |
66 | } |
66 | } |
67 | 67 | ||
68 | /** |
68 | /** |
69 | * write a character <attribute> to <address> of MAX7456 display memory |
69 | * write a character <attribute> to <address> of MAX7456 display memory |
70 | */ |
70 | */ |
71 | void write_char_att(uint16_t address, char attribute) { |
71 | void write_char_att(uint16_t address, char attribute) { |
72 | // the only important part is that the DMAH[1] is set |
72 | // the only important part is that the DMAH[1] is set |
73 | // so we add 2 which binary is the 2nd lowest byte |
73 | // so we add 2 which binary is the 2nd lowest byte |
74 | spi_send_byte(0x05, ((address & 0xFF00) >> 8) | 2); // DMAH |
74 | spi_send_byte(0x05, ((address & 0xFF00) >> 8) | 2); // DMAH |
75 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
75 | spi_send_byte(0x06, (address & 0x00FF)); // DMAL |
76 | spi_send_byte(0x07, attribute); // DMDI |
76 | spi_send_byte(0x07, attribute); // DMDI |
77 | } |
77 | } |
78 | 78 | ||
79 | /** |
79 | /** |
80 | * write a <character> at <x>/<y> to MAX7456 display memory |
80 | * write a <character> at <x>/<y> to MAX7456 display memory |
81 | */ |
81 | */ |
82 | void write_char_xy(uint8_t x, uint8_t y, char character) { |
82 | void write_char_xy(uint8_t x, uint8_t y, char character) { |
83 | uint16_t address = y * 30 + x; |
83 | uint16_t address = y * 30 + x; |
84 | write_char(address, character); |
84 | write_char(address, character); |
85 | } |
85 | } |
86 | 86 | ||
87 | /** |
87 | /** |
88 | * write a character <attribute> at <x>/<y> to MAX7456 display memory |
88 | * write a character <attribute> at <x>/<y> to MAX7456 display memory |
89 | */ |
89 | */ |
90 | void write_char_att_xy(uint8_t x, uint8_t y, char attribute) { |
90 | void write_char_att_xy(uint8_t x, uint8_t y, char attribute) { |
91 | uint16_t address = y * 30 + x; |
91 | uint16_t address = y * 30 + x; |
92 | write_char_att(address, attribute); |
92 | write_char_att(address, attribute); |
93 | } |
93 | } |
94 | 94 | ||
95 | /** |
95 | /** |
96 | * clear display by writing blank characters all over it |
96 | * clear display memory |
- | 97 | * (also sets 8bit mode) |
|
97 | */ |
98 | */ |
98 | void clear(void) { |
99 | void clear(void) { |
99 | uint16_t memory_address = 0; |
100 | /*uint16_t memory_address = 0; |
100 | for (unsigned int a = 0; a < 480; a++) { |
101 | for (unsigned int a = 0; a < 480; a++) { |
101 | write_char(memory_address++, 0); |
102 | write_char(memory_address++, 0); |
102 | } |
103 | }*/ |
- | 104 | // clear all display-mem (DMM) |
|
- | 105 | spi_send_byte(0x04, 0b01000100); |
|
- | 106 | ||
- | 107 | // clearing takes 12uS according to maxim so lets wait longer |
|
- | 108 | _delay_us(20); |
|
103 | } |
109 | } |
104 | 110 | ||
105 | /** |
111 | /** |
106 | * write an ascii <character> to <address> of MAX7456 display memory |
112 | * write an ascii <character> to <address> of MAX7456 display memory |
107 | */ |
113 | */ |
108 | void write_ascii_char(uint16_t address, char c) { |
114 | void write_ascii_char(uint16_t address, char c) { |
109 | if (c == 32) c = 0; // remap space |
115 | if (c == 32) c = 0; // remap space |
110 | else if (c > 48 && c <= 57) c -= 48; // remap numbers |
116 | else if (c > 48 && c <= 57) c -= 48; // remap numbers |
111 | else if (c == '0') c = 10; // remap zero |
117 | else if (c == '0') c = 10; // remap zero |
112 | else if (c >= 65 && c <= 90) c -= 54; // remap big letters |
118 | else if (c >= 65 && c <= 90) c -= 54; // remap big letters |
113 | else if (c >= 97 && c <= 122) c -= 60; // remap small letters |
119 | else if (c >= 97 && c <= 122) c -= 60; // remap small letters |
114 | else if (c == '(') c = 63; // remap |
120 | else if (c == '(') c = 63; // remap |
115 | else if (c == ')') c = 64; // remap |
121 | else if (c == ')') c = 64; // remap |
116 | else if (c == '.') c = 65; // remap |
122 | else if (c == '.') c = 65; // remap |
117 | else if (c == '?') c = 66; // remap |
123 | else if (c == '?') c = 66; // remap |
118 | else if (c == ';') c = 67; // remap |
124 | else if (c == ';') c = 67; // remap |
119 | else if (c == ':') c = 68; // remap |
125 | else if (c == ':') c = 68; // remap |
120 | else if (c == ',') c = 69; // remap |
126 | else if (c == ',') c = 69; // remap |
121 | else if (c == '\'') c = 70; // remap |
127 | else if (c == '\'') c = 70; // remap |
122 | else if (c == '/') c = 71; // remap |
128 | else if (c == '/') c = 71; // remap |
123 | else if (c == '"') c = 72; // remap |
129 | else if (c == '"') c = 72; // remap |
124 | else if (c == '-') c = 73; // remap minus |
130 | else if (c == '-') c = 73; // remap minus |
125 | else if (c == '<') c = 74; // remap |
131 | else if (c == '<') c = 74; // remap |
126 | else if (c == '>') c = 75; // remap |
132 | else if (c == '>') c = 75; // remap |
127 | else if (c == '@') c = 76; // remap |
133 | else if (c == '@') c = 76; // remap |
128 | write_char(address, c); |
134 | write_char(address, c); |
129 | } |
135 | } |
130 | 136 | ||
131 | /** |
137 | /** |
132 | * write an ascii <string> at <x>/<y> to MAX7456 display memory |
138 | * write an ascii <string> at <x>/<y> to MAX7456 display memory |
133 | */ |
139 | */ |
134 | void write_ascii_string(uint8_t x, uint8_t y, char *string) { |
140 | void write_ascii_string(uint8_t x, uint8_t y, char *string) { |
135 | while (*string) { |
141 | while (*string) { |
136 | write_ascii_char(((x++)+(y * 30)), *string); |
142 | write_ascii_char(((x++)+(y * 30)), *string); |
137 | string++; |
143 | string++; |
138 | } |
144 | } |
139 | } |
145 | } |
140 | 146 | ||
141 | /** |
147 | /** |
142 | * write an ascii <string> from progmen at <x>/<y> to MAX7456 display memory |
148 | * write an ascii <string> from progmen at <x>/<y> to MAX7456 display memory |
143 | */ |
149 | */ |
144 | void write_ascii_string_pgm(uint8_t x, uint8_t y, char *string) { |
150 | void write_ascii_string_pgm(uint8_t x, uint8_t y, char *string) { |
145 | while (pgm_read_byte(string) != 0x00) |
151 | while (pgm_read_byte(string) != 0x00) |
146 | write_ascii_char(((x++)+(y * 30)), pgm_read_byte(string++)); |
152 | write_ascii_char(((x++)+(y * 30)), pgm_read_byte(string++)); |
147 | } |
153 | } |
148 | 154 | ||
149 | /** |
155 | /** |
150 | * write an <string> from progmen at <x>/<y> downwards to MAX7456 display memory |
156 | * write an <string> from progmen at <x>/<y> downwards to MAX7456 display memory |
151 | */ |
157 | */ |
152 | void write_string_pgm_down(uint8_t x, uint8_t y, char *string, uint8_t length) { |
158 | void write_string_pgm_down(uint8_t x, uint8_t y, char *string, uint8_t length) { |
153 | while (length--) |
159 | while (length--) |
154 | write_char((x+(y++ * 30)), pgm_read_byte(string++)); |
160 | write_char((x+(y++ * 30)), pgm_read_byte(string++)); |
155 | } |
161 | } |
156 | 162 | ||
157 | /** |
163 | /** |
158 | * Write only some digits of a unsigned <number> at <x>/<y> to MAX7456 display memory |
164 | * Write only some digits of a unsigned <number> at <x>/<y> to MAX7456 display memory |
159 | * <num> represents the largest multiple of 10 that will still be displayable as |
165 | * <num> represents the largest multiple of 10 that will still be displayable as |
160 | * the first digit, so num = 10 will be 0-99 and so on |
166 | * the first digit, so num = 10 will be 0-99 and so on |
161 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
167 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
162 | */ |
168 | */ |
163 | void write_ndigit_number_u(uint8_t x, uint8_t y, uint16_t number, int16_t num, uint8_t pad) { |
169 | void write_ndigit_number_u(uint8_t x, uint8_t y, uint16_t number, int16_t num, uint8_t pad) { |
164 | // if number is largar than 99[..]9 we must decrease it |
170 | // if number is largar than 99[..]9 we must decrease it |
165 | while (number >= (num * 10)) { |
171 | while (number >= (num * 10)) { |
166 | number -= num * 10; |
172 | number -= num * 10; |
167 | } |
173 | } |
168 | 174 | ||
169 | uint8_t started = 0; |
175 | uint8_t started = 0; |
170 | 176 | ||
171 | while (num > 0) { |
177 | while (num > 0) { |
172 | uint8_t b = number / num; |
178 | uint8_t b = number / num; |
173 | if (b > 0 || started || num == 1) { |
179 | if (b > 0 || started || num == 1) { |
174 | write_ascii_char((x++)+(y * 30), '0' + b); |
180 | write_ascii_char((x++)+(y * 30), '0' + b); |
175 | started = 1; |
181 | started = 1; |
176 | } else { |
182 | } else { |
177 | if (pad) write_ascii_char((x++)+(y * 30), '0'); |
183 | if (pad) write_ascii_char((x++)+(y * 30), '0'); |
178 | else write_ascii_char((x++)+(y * 30), 0); |
184 | else write_ascii_char((x++)+(y * 30), 0); |
179 | } |
185 | } |
180 | number -= b * num; |
186 | number -= b * num; |
181 | 187 | ||
182 | num /= 10; |
188 | num /= 10; |
183 | } |
189 | } |
184 | } |
190 | } |
185 | 191 | ||
186 | /** |
192 | /** |
187 | * Write only some digits of a signed <number> at <x>/<y> to MAX7456 display memory |
193 | * Write only some digits of a signed <number> at <x>/<y> to MAX7456 display memory |
188 | * <num> represents the largest multiple of 10 that will still be displayable as |
194 | * <num> represents the largest multiple of 10 that will still be displayable as |
189 | * the first digit, so num = 10 will be 0-99 and so on |
195 | * the first digit, so num = 10 will be 0-99 and so on |
190 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
196 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
191 | */ |
197 | */ |
192 | void write_ndigit_number_s(uint8_t x, uint8_t y, int16_t number, int16_t num, uint8_t pad) { |
198 | void write_ndigit_number_s(uint8_t x, uint8_t y, int16_t number, int16_t num, uint8_t pad) { |
193 | if (((uint16_t) number) > 32767) { |
199 | if (((uint16_t) number) > 32767) { |
194 | number = number - 65536; |
200 | number = number - 65536; |
195 | num *= -1; |
201 | num *= -1; |
196 | 202 | ||
197 | // if number is smaller than -99[..]9 we must increase it |
203 | // if number is smaller than -99[..]9 we must increase it |
198 | while (number <= (num * 10)) { |
204 | while (number <= (num * 10)) { |
199 | number -= num * 10; |
205 | number -= num * 10; |
200 | } |
206 | } |
201 | 207 | ||
202 | uint8_t started = 0; |
208 | uint8_t started = 0; |
203 | 209 | ||
204 | while (num < 0) { |
210 | while (num < 0) { |
205 | uint8_t b = number / num; |
211 | uint8_t b = number / num; |
206 | if (pad) write_ascii_char((x)+(y * 30), '0'); |
212 | if (pad) write_ascii_char((x)+(y * 30), '0'); |
207 | if (b > 0 || started || num == 1) { |
213 | if (b > 0 || started || num == 1) { |
208 | if (!started) write_char((x - 1)+(y * 30), 0x49); |
214 | if (!started) write_char((x - 1)+(y * 30), 0x49); |
209 | write_ascii_char((x++)+(y * 30), '0' + b); |
215 | write_ascii_char((x++)+(y * 30), '0' + b); |
210 | started = 1; |
216 | started = 1; |
211 | } else { |
217 | } else { |
212 | write_ascii_char((x++)+(y * 30), 0); |
218 | write_ascii_char((x++)+(y * 30), 0); |
213 | } |
219 | } |
214 | number -= b * num; |
220 | number -= b * num; |
215 | 221 | ||
216 | num /= 10; |
222 | num /= 10; |
217 | } |
223 | } |
218 | } else { |
224 | } else { |
219 | write_char((x)+(y * 30), 0); |
225 | write_char((x)+(y * 30), 0); |
220 | write_ndigit_number_u(x, y, number, num, pad); |
226 | write_ndigit_number_u(x, y, number, num, pad); |
221 | } |
227 | } |
222 | } |
228 | } |
223 | 229 | ||
224 | /** |
230 | /** |
225 | * Write only some digits of a unsigned <number> at <x>/<y> to MAX7456 display memory |
231 | * Write only some digits of a unsigned <number> at <x>/<y> to MAX7456 display memory |
226 | * as /10th of the value |
232 | * as /10th of the value |
227 | * <num> represents the largest multiple of 10 that will still be displayable as |
233 | * <num> represents the largest multiple of 10 that will still be displayable as |
228 | * the first digit, so num = 10 will be 0-99 and so on |
234 | * the first digit, so num = 10 will be 0-99 and so on |
229 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
235 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
230 | */ |
236 | */ |
231 | void write_ndigit_number_u_10th(uint8_t x, uint8_t y, uint16_t number, int16_t num, uint8_t pad) { |
237 | void write_ndigit_number_u_10th(uint8_t x, uint8_t y, uint16_t number, int16_t num, uint8_t pad) { |
232 | // if number is largar than 99[..]9 we must decrease it |
238 | // if number is largar than 99[..]9 we must decrease it |
233 | while (number >= (num * 10)) { |
239 | while (number >= (num * 10)) { |
234 | number -= num * 10; |
240 | number -= num * 10; |
235 | } |
241 | } |
236 | 242 | ||
237 | 243 | ||
238 | uint8_t started = 0; |
244 | uint8_t started = 0; |
239 | while (num > 0) { |
245 | while (num > 0) { |
240 | uint8_t b = number / num; |
246 | uint8_t b = number / num; |
241 | if (b > 0 || started || num == 1) { |
247 | if (b > 0 || started || num == 1) { |
242 | if ((num / 10) == 0) { |
248 | if ((num / 10) == 0) { |
243 | if (!started) write_ascii_char((x - 1)+(y * 30), '0'); |
249 | if (!started) write_ascii_char((x - 1)+(y * 30), '0'); |
244 | write_char((x++)+(y * 30), 65); // decimal point |
250 | write_char((x++)+(y * 30), 65); // decimal point |
245 | } |
251 | } |
246 | write_ascii_char((x++)+(y * 30), '0' + b); |
252 | write_ascii_char((x++)+(y * 30), '0' + b); |
247 | started = 1; |
253 | started = 1; |
248 | } else { |
254 | } else { |
249 | if (pad) write_ascii_char((x++)+(y * 30), '0'); |
255 | if (pad) write_ascii_char((x++)+(y * 30), '0'); |
250 | else write_ascii_char((x++)+(y * 30), ' '); |
256 | else write_ascii_char((x++)+(y * 30), ' '); |
251 | } |
257 | } |
252 | number -= b * num; |
258 | number -= b * num; |
253 | 259 | ||
254 | num /= 10; |
260 | num /= 10; |
255 | } |
261 | } |
256 | } |
262 | } |
257 | 263 | ||
258 | /** |
264 | /** |
259 | * Write only some digits of a signed <number> at <x>/<y> to MAX7456 display memory |
265 | * Write only some digits of a signed <number> at <x>/<y> to MAX7456 display memory |
260 | * as /10th of the value |
266 | * as /10th of the value |
261 | * <num> represents the largest multiple of 10 that will still be displayable as |
267 | * <num> represents the largest multiple of 10 that will still be displayable as |
262 | * the first digit, so num = 10 will be 0-99 and so on |
268 | * the first digit, so num = 10 will be 0-99 and so on |
263 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
269 | * <pad> = 1 will cause blank spaced to be filled up with zeros e.g. 007 instead of 7 |
264 | */ |
270 | */ |
265 | void write_ndigit_number_s_10th(uint8_t x, uint8_t y, int16_t number, int16_t num, uint8_t pad) { |
271 | void write_ndigit_number_s_10th(uint8_t x, uint8_t y, int16_t number, int16_t num, uint8_t pad) { |
266 | if (((uint16_t) number) > 32767) { |
272 | if (((uint16_t) number) > 32767) { |
267 | number = number - 65536; |
273 | number = number - 65536; |
268 | num *= -1; |
274 | num *= -1; |
269 | 275 | ||
270 | // if number is smaller than -99[..]9 we must increase it |
276 | // if number is smaller than -99[..]9 we must increase it |
271 | while (number <= (num * 10)) { |
277 | while (number <= (num * 10)) { |
272 | number -= num * 10; |
278 | number -= num * 10; |
273 | } |
279 | } |
274 | 280 | ||
275 | uint8_t started = 0; |
281 | uint8_t started = 0; |
276 | 282 | ||
277 | while (num < 0) { |
283 | while (num < 0) { |
278 | uint8_t b = number / num; |
284 | uint8_t b = number / num; |
279 | if (pad) write_ascii_char((x)+(y * 30), '0'); |
285 | if (pad) write_ascii_char((x)+(y * 30), '0'); |
280 | if (b > 0 || started || num == 1) { |
286 | if (b > 0 || started || num == 1) { |
281 | if ((num / 10) == 0) { |
287 | if ((num / 10) == 0) { |
282 | if (!started) { |
288 | if (!started) { |
283 | write_ascii_char((x - 2)+(y * 30), '-'); |
289 | write_ascii_char((x - 2)+(y * 30), '-'); |
284 | write_ascii_char((x - 1)+(y * 30), '0'); |
290 | write_ascii_char((x - 1)+(y * 30), '0'); |
285 | } |
291 | } |
286 | write_char((x++)+(y * 30), 65); // decimal point |
292 | write_char((x++)+(y * 30), 65); // decimal point |
287 | } else if (!started) { |
293 | } else if (!started) { |
288 | write_char((x - 1)+(y * 30), 0x49); // minus |
294 | write_char((x - 1)+(y * 30), 0x49); // minus |
289 | } |
295 | } |
290 | write_ascii_char((x++)+(y * 30), '0' + b); |
296 | write_ascii_char((x++)+(y * 30), '0' + b); |
291 | started = 1; |
297 | started = 1; |
292 | } else { |
298 | } else { |
293 | write_ascii_char((x++)+(y * 30), 0); |
299 | write_ascii_char((x++)+(y * 30), 0); |
294 | } |
300 | } |
295 | number -= b * num; |
301 | number -= b * num; |
296 | 302 | ||
297 | num /= 10; |
303 | num /= 10; |
298 | } |
304 | } |
299 | } else { |
305 | } else { |
300 | write_char((x)+(y * 30), 0); |
306 | write_char((x)+(y * 30), 0); |
301 | write_ndigit_number_u_10th(x, y, number, num, pad); |
307 | write_ndigit_number_u_10th(x, y, number, num, pad); |
302 | } |
308 | } |
303 | } |
309 | } |
304 | 310 | ||
305 | /** |
311 | /** |
306 | * write <seconds> as human readable time at <x>/<y> to MAX7456 display mem |
312 | * write <seconds> as human readable time at <x>/<y> to MAX7456 display mem |
307 | */ |
313 | */ |
308 | void write_time(uint8_t x, uint8_t y, uint16_t seconds) { |
314 | void write_time(uint8_t x, uint8_t y, uint16_t seconds) { |
309 | uint16_t min = seconds / 60; |
315 | uint16_t min = seconds / 60; |
310 | seconds -= min * 60; |
316 | seconds -= min * 60; |
311 | write_ndigit_number_u(x, y, min, 100, 0); |
317 | write_ndigit_number_u(x, y, min, 100, 0); |
312 | write_char_xy(x + 3, y, 68); |
318 | write_char_xy(x + 3, y, 68); |
313 | write_ndigit_number_u(x + 4, y, seconds, 10, 1); |
319 | write_ndigit_number_u(x + 4, y, seconds, 10, 1); |
314 | } |
320 | } |
315 | 321 | ||
316 | /** |
322 | /** |
317 | * for testing write all chars to screen |
323 | * for testing write all chars to screen |
318 | */ |
324 | */ |
319 | void write_all_chars() { |
325 | void write_all_chars() { |
320 | uint16_t x = 3, y = 2, t = 0; |
326 | uint16_t x = 3, y = 2, t = 0; |
321 | while (t < 256) { |
327 | while (t < 256) { |
322 | write_char_xy(x++, y, t++); |
328 | write_char_xy(x++, y, t++); |
323 | if (x > 25) { |
329 | if (x > 25) { |
324 | y++; |
330 | y++; |
325 | x = 3; |
331 | x = 3; |
326 | } |
332 | } |
327 | } |
333 | } |
328 | } |
334 | } |
329 | 335 | ||
330 | /** |
336 | /** |
331 | * let the MAX7456 learn a new character at <number> |
337 | * let the MAX7456 learn a new character at <number> |
332 | * with <data>. |
338 | * with <data>. |
333 | */ |
339 | */ |
334 | void learn_char(uint8_t number, unsigned char* data) { |
340 | void learn_char(uint8_t number, unsigned char* data) { |
335 | // select character to write (CMAH) |
341 | // select character to write (CMAH) |
336 | spi_send_byte(0x09, number); |
342 | spi_send_byte(0x09, number); |
337 | 343 | ||
338 | for (uint8_t i = 0; i < 54; i++) { |
344 | for (uint8_t i = 0; i < 54; i++) { |
339 | // select 4pixel byte of char (CMAL) |
345 | // select 4pixel byte of char (CMAL) |
340 | spi_send_byte(0x0A, i); |
346 | spi_send_byte(0x0A, i); |
341 | 347 | ||
342 | // write 4pixel byte of char (CMDI) |
348 | // write 4pixel byte of char (CMDI) |
343 | spi_send_byte(0x0B, data[i]); |
349 | spi_send_byte(0x0B, data[i]); |
344 | } |
350 | } |
345 | 351 | ||
346 | // write to the NVM array from the shadow RAM (CMM) |
352 | // write to the NVM array from the shadow RAM (CMM) |
347 | spi_send_byte(0x08, 0b10100000); |
353 | spi_send_byte(0x08, 0b10100000); |
348 | 354 | ||
349 | // according to maxim writing to nvram takes about 12ms, lets wait longer |
355 | // according to maxim writing to nvram takes about 12ms, lets wait longer |
350 | _delay_ms(120); |
356 | _delay_ms(120); |
351 | } |
357 | } |
352 | 358 |