Mercurial > louis > kiibohd-controller
annotate Scan/STLcd/lcd_scan.c @ 351:38395a57cf52
Adding 16-bit brightness control to LCD backlight
| author | Jacob Alexander <haata@kiibohd.com> |
|---|---|
| date | Sat, 01 Aug 2015 21:59:43 -0700 |
| parents | 136e47478441 |
| children | 99b567a3b1f2 |
| rev | line source |
|---|---|
| 331 | 1 /* Copyright (C) 2015 by Jacob Alexander |
| 2 * | |
| 3 * This file is free software: you can redistribute it and/or modify | |
| 4 * it under the terms of the GNU General Public License as published by | |
| 5 * the Free Software Foundation, either version 3 of the License, or | |
| 6 * (at your option) any later version. | |
| 7 * | |
| 8 * This file is distributed in the hope that it will be useful, | |
| 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 11 * GNU General Public License for more details. | |
| 12 * | |
| 13 * You should have received a copy of the GNU General Public License | |
| 14 * along with this file. If not, see <http://www.gnu.org/licenses/>. | |
| 15 */ | |
| 16 | |
| 17 // ----- Includes ----- | |
| 18 | |
| 19 // Compiler Includes | |
| 20 #include <Lib/ScanLib.h> | |
| 21 | |
| 22 // Project Includes | |
| 23 #include <cli.h> | |
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24 #include <kll.h> |
| 331 | 25 #include <led.h> |
| 26 #include <print.h> | |
| 27 | |
| 28 // Local Includes | |
| 29 #include "lcd_scan.h" | |
| 30 | |
| 31 | |
| 32 | |
| 33 // ----- Defines ----- | |
| 34 | |
| 35 #define LCD_TOTAL_VISIBLE_PAGES 4 | |
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36 #define LCD_PAGE_LEN 128 |
| 331 | 37 |
| 38 | |
| 39 | |
| 40 // ----- Macros ----- | |
| 41 | |
| 42 // Number of entries in the SPI0 TxFIFO | |
| 43 #define SPI0_TxFIFO_CNT ( ( SPI0_SR & SPI_SR_TXCTR ) >> 12 ) | |
| 44 | |
| 45 | |
| 46 | |
| 47 // ----- Structs ----- | |
| 48 | |
| 49 // ----- Function Declarations ----- | |
| 50 | |
| 51 // CLI Functions | |
| 52 void cliFunc_lcdCmd( char* args ); | |
| 53 void cliFunc_lcdInit( char* args ); | |
| 54 void cliFunc_lcdTest( char* args ); | |
| 55 | |
| 56 | |
| 57 | |
| 58 // ----- Variables ----- | |
| 59 | |
| 60 // Full Toggle State | |
| 61 uint8_t cliFullToggleState = 0; | |
| 62 | |
| 63 // Normal/Reverse Toggle State | |
| 64 uint8_t cliNormalReverseToggleState = 0; | |
| 65 | |
| 66 // Scan Module command dictionary | |
| 67 CLIDict_Entry( lcdCmd, "Send byte via SPI, second argument enables a0. Defaults to control." ); | |
| 68 CLIDict_Entry( lcdInit, "Re-initialize the LCD display." ); | |
| 69 CLIDict_Entry( lcdTest, "Test out the LCD display." ); | |
| 70 | |
| 71 CLIDict_Def( lcdCLIDict, "ST LCD Module Commands" ) = { | |
| 72 CLIDict_Item( lcdCmd ), | |
| 73 CLIDict_Item( lcdInit ), | |
| 74 CLIDict_Item( lcdTest ), | |
| 75 { 0, 0, 0 } // Null entry for dictionary end | |
| 76 }; | |
| 77 | |
| 78 | |
| 79 | |
| 80 // ----- Interrupt Functions ----- | |
| 81 | |
| 82 | |
| 83 | |
| 84 // ----- Functions ----- | |
| 85 | |
| 86 inline void SPI_setup() | |
| 87 { | |
| 88 // Enable SPI internal clock | |
| 89 SIM_SCGC6 |= SIM_SCGC6_SPI0; | |
| 90 | |
| 91 // Setup MOSI (SOUT) and SCLK (SCK) | |
| 92 PORTC_PCR6 = PORT_PCR_DSE | PORT_PCR_MUX(2); | |
| 93 PORTC_PCR5 = PORT_PCR_DSE | PORT_PCR_MUX(2); | |
| 94 | |
| 95 // Setup SS (PCS) | |
| 96 PORTC_PCR4 = PORT_PCR_DSE | PORT_PCR_MUX(2); | |
| 97 | |
| 98 // Master Mode, CS0 | |
| 99 SPI0_MCR = SPI_MCR_MSTR | SPI_MCR_PCSIS(1); | |
| 100 | |
| 101 // DSPI Clock and Transfer Attributes | |
| 102 // Frame Size: 8 bits | |
| 103 // MSB First | |
| 104 // CLK Low by default | |
| 105 SPI0_CTAR0 = SPI_CTAR_FMSZ(7) | |
| 106 | SPI_CTAR_ASC(7) | |
| 107 | SPI_CTAR_DT(7) | |
| 108 | SPI_CTAR_CSSCK(7) | |
| 109 | SPI_CTAR_PBR(0) | SPI_CTAR_BR(7); | |
| 110 } | |
| 111 | |
| 112 // Write buffer to SPI FIFO | |
| 113 void SPI_write( uint8_t *buffer, uint8_t len ) | |
| 114 { | |
| 115 | |
| 116 for ( uint8_t byte = 0; byte < len; byte++ ) | |
| 117 { | |
| 118 // Wait for SPI TxFIFO to have 4 or fewer entries | |
| 119 while ( !( SPI0_SR & SPI_SR_TFFF ) ) | |
| 120 delayMicroseconds(10); | |
| 121 | |
| 122 // Write byte to TxFIFO | |
| 123 // CS0, CTAR0 | |
| 124 SPI0_PUSHR = ( buffer[ byte ] & 0xff ) | SPI_PUSHR_PCS(1); | |
| 125 | |
| 126 // Indicate transfer has completed | |
| 127 while ( !( SPI0_SR & SPI_SR_TCF ) ); | |
| 128 SPI0_SR |= SPI_SR_TCF; | |
| 129 } | |
| 130 } | |
| 131 | |
| 132 // Write to a control register | |
| 133 void LCD_writeControlReg( uint8_t byte ) | |
| 134 { | |
| 135 // Wait for TxFIFO to be empt | |
| 136 while ( SPI0_TxFIFO_CNT != 0 ); | |
| 137 | |
| 138 // Set A0 low to enter control register mode | |
| 139 GPIOC_PCOR |= (1<<7); | |
| 140 | |
| 141 // Write byte to SPI FIFO | |
| 142 SPI_write( &byte, 1 ); | |
| 143 | |
| 144 // Wait for TxFIFO to be empty | |
| 145 while ( SPI0_TxFIFO_CNT != 0 ); | |
| 146 | |
| 147 // Make sure data has transferred | |
| 148 delayMicroseconds(10); // XXX Adjust if SPI speed changes | |
| 149 | |
| 150 // Set A0 high to go back to display register mode | |
| 151 GPIOC_PSOR |= (1<<7); | |
| 152 } | |
| 153 | |
| 154 // Write to display register | |
| 155 // Pages 0-7 normal display | |
| 156 // Page 8 icon buffer | |
| 157 void LCD_writeDisplayReg( uint8_t page, uint8_t *buffer, uint8_t len ) | |
| 158 { | |
| 159 // Set the register page | |
| 160 LCD_writeControlReg( 0xB0 | ( 0x0F & page ) ); | |
| 161 | |
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162 // Set display start line |
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163 LCD_writeControlReg( 0x40 ); |
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164 |
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165 // Reset Column Address |
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166 LCD_writeControlReg( 0x10 ); |
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167 LCD_writeControlReg( 0x00 ); |
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168 |
| 331 | 169 // Write buffer to SPI |
| 170 SPI_write( buffer, len ); | |
| 171 } | |
| 172 | |
| 173 inline void LCD_clearPage( uint8_t page ) | |
| 174 { | |
| 175 // Set the register page | |
| 176 LCD_writeControlReg( 0xB0 | ( 0x0F & page ) ); | |
| 177 | |
| 178 // Set display start line | |
| 179 LCD_writeControlReg( 0x40 ); | |
| 180 | |
| 181 // Reset Column Address | |
| 182 LCD_writeControlReg( 0x10 ); | |
| 183 LCD_writeControlReg( 0x00 ); | |
| 184 | |
| 185 for ( uint8_t page_reg = 0; page_reg < LCD_PAGE_LEN; page_reg++ ) | |
| 186 { | |
| 187 uint8_t byte = 0; | |
| 188 | |
| 189 // Write buffer to SPI | |
| 190 SPI_write( &byte, 1 ); | |
| 191 } | |
| 192 | |
| 193 // Wait for TxFIFO to be empty | |
| 194 while ( SPI0_TxFIFO_CNT != 0 ); | |
| 195 } | |
| 196 | |
| 197 // Clear Display | |
| 198 void LCD_clear() | |
| 199 { | |
| 200 // Setup each page | |
| 201 for ( uint8_t page = 0; page < LCD_TOTAL_VISIBLE_PAGES; page++ ) | |
| 202 { | |
| 203 LCD_clearPage( page ); | |
| 204 } | |
| 205 | |
| 206 // Reset Page, Start Line, and Column Address | |
| 207 // Page | |
| 208 LCD_writeControlReg( 0xB0 ); | |
| 209 | |
| 210 // Start Line | |
| 211 LCD_writeControlReg( 0x40 ); | |
| 212 | |
| 213 // Reset Column Address | |
| 214 LCD_writeControlReg( 0x10 ); | |
| 215 LCD_writeControlReg( 0x00 ); | |
| 216 } | |
| 217 | |
| 218 // Intialize display | |
| 219 void LCD_initialize() | |
| 220 { | |
| 221 // ADC Select (Normal) | |
| 222 LCD_writeControlReg( 0xA0 ); | |
| 223 | |
| 224 // LCD Off | |
| 225 LCD_writeControlReg( 0xAE ); | |
| 226 | |
| 227 // COM Scan Output Direction | |
| 228 LCD_writeControlReg( 0xC0 ); | |
| 229 | |
| 230 // LCD Bias (1/6 bias) | |
| 231 LCD_writeControlReg( 0xA2 ); | |
| 232 | |
| 233 // Power Supply Operating Mode (Internal Only) | |
| 234 LCD_writeControlReg( 0x2F ); | |
| 235 | |
| 236 // Internal Rb/Ra Ratio | |
| 237 LCD_writeControlReg( 0x26 ); | |
| 238 | |
| 239 // Reset | |
| 240 LCD_writeControlReg( 0xE2 ); | |
| 241 | |
| 242 // Electric volume mode set, and value | |
| 243 LCD_writeControlReg( 0x81 ); | |
| 244 LCD_writeControlReg( 0x00 ); | |
| 245 | |
| 246 // LCD On | |
| 247 LCD_writeControlReg( 0xAF ); | |
| 248 | |
| 249 // Clear Display RAM | |
| 250 LCD_clear(); | |
| 251 } | |
| 252 | |
| 253 // Setup | |
| 254 inline void LCD_setup() | |
| 255 { | |
| 256 // Register Scan CLI dictionary | |
| 257 CLI_registerDictionary( lcdCLIDict, lcdCLIDictName ); | |
| 258 | |
| 259 // Initialize SPI | |
| 260 SPI_setup(); | |
| 261 | |
| 262 // Setup Register Control Signal (A0) | |
| 263 // Start in display register mode (1) | |
| 264 GPIOC_PDDR |= (1<<7); | |
| 265 PORTC_PCR7 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1); | |
| 266 GPIOC_PSOR |= (1<<7); | |
| 267 | |
| 268 // Setup LCD Reset pin (RST) | |
| 269 // 0 - Reset, 1 - Normal Operation | |
| 270 // Start in normal mode (1) | |
| 271 GPIOC_PDDR |= (1<<8); | |
| 272 PORTC_PCR8 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1); | |
| 273 GPIOC_PSOR |= (1<<8); | |
| 274 | |
| 275 // Run LCD intialization sequence | |
| 276 LCD_initialize(); | |
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277 |
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278 // Setup Backlight |
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279 // TODO Expose default settings |
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280 SIM_SCGC6 |= SIM_SCGC6_FTM0; |
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281 FTM0_CNT = 0; // Reset counter |
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282 |
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283 // PWM Period |
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284 // 16-bit maximum |
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285 FTM0_MOD = 0xFFFF; |
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286 |
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287 // Set FTM to PWM output - Edge Aligned, Low-true pulses |
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288 FTM0_C0SC = 0x24; // MSnB:MSnA = 10, ELSnB:ELSnA = 01 |
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289 FTM0_C1SC = 0x24; |
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290 FTM0_C2SC = 0x24; |
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291 |
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292 // Base FTM clock selection (72 MHz system clock) |
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293 // Pre-scalar calculations |
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294 // 0 - 72 MHz - Highest power usage/best result |
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295 // 1 - 36 MHz |
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296 // 2 - 18 MHz |
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297 // 3 - 9 MHz - Slightly visible flicker (peripheral vision) |
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298 // 4 - 4 500 kHz - Visible flickering |
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299 // 5 - 2 250 kHz |
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300 // 6 - 1 125 kHz |
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301 // 7 - 562 500 Hz |
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302 // System clock, /w prescalar setting |
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303 FTM0_SC = FTM_SC_CLKS(1) | FTM_SC_PS( STLcdBacklightPrescalar_define ); |
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304 |
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305 /* Write frequency TODO API |
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306 FTM0_SC = 0; |
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307 FTM0_CNT = 0; |
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308 FTM0_MOD = mod; |
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309 FTM0_SC = FTM_SC_CLKS(1) | FTM_SC_PS(prescale); |
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310 */ |
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311 |
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312 // Red |
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313 FTM0_C0V = STLcdBacklightRed_define; |
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314 PORTC_PCR1 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(4); |
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315 |
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316 // Green |
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317 FTM0_C1V = STLcdBacklightGreen_define; |
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318 PORTC_PCR2 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(4); |
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319 |
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320 // Blue |
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321 FTM0_C2V = STLcdBacklightBlue_define; |
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322 PORTC_PCR3 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(4); |
| 331 | 323 } |
| 324 | |
| 325 | |
| 326 // LCD State processing loop | |
| 327 inline uint8_t LCD_scan() | |
| 328 { | |
| 329 // NOP - Screen Refresh | |
| 330 //LCD_writeControlReg( 0xE3 ); | |
| 331 return 0; | |
| 332 } | |
| 333 | |
| 334 | |
| 335 | |
| 336 // ----- CLI Command Functions ----- | |
| 337 | |
| 338 void cliFunc_lcdInit( char* args ) | |
| 339 { | |
| 340 print( NL ); // No \r\n by default after the command is entered | |
| 341 LCD_initialize(); | |
| 342 } | |
| 343 | |
| 344 void cliFunc_lcdTest( char* args ) | |
| 345 { | |
| 346 print( NL ); // No \r\n by default after the command is entered | |
| 347 | |
| 348 //LCD_initialize(); | |
| 349 // Test pattern | |
| 350 uint8_t pattern[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; | |
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351 |
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352 |
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353 uint8_t logo[] = { |
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354 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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355 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03, 0x03, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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356 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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357 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03, 0x03, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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358 }; |
| 331 | 359 //uint8_t pattern[] = { 0xFF, 0x00, 0x96, 0xFF, 0x00, 0xFF, 0x00 }; |
| 360 | |
| 361 // Write to page D0 | |
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332
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362 //LCD_writeDisplayReg( 0, pattern, sizeof( pattern ) ); |
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363 |
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364 for ( uint8_t page = 0; page < LCD_TOTAL_VISIBLE_PAGES; page++ ) |
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365 { |
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366 LCD_writeDisplayReg( page, &logo[page * LCD_PAGE_LEN], LCD_PAGE_LEN ); |
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367 } |
| 331 | 368 } |
| 369 | |
| 370 void cliFunc_lcdCmd( char* args ) | |
| 371 { | |
| 372 char* curArgs; | |
| 373 char* arg1Ptr; | |
| 374 char* arg2Ptr = args; | |
| 375 | |
| 376 print( NL ); // No \r\n by default after the command is entered | |
| 377 | |
| 378 curArgs = arg2Ptr; // Use the previous 2nd arg pointer to separate the next arg from the list | |
| 379 CLI_argumentIsolation( curArgs, &arg1Ptr, &arg2Ptr ); | |
| 380 | |
| 381 // No args | |
| 382 if ( *arg1Ptr == '\0' ) | |
| 383 return; | |
| 384 | |
| 385 // SPI Command | |
| 386 uint8_t cmd = (uint8_t)numToInt( arg1Ptr ); | |
| 387 | |
| 388 curArgs = arg2Ptr; // Use the previous 2nd arg pointer to separate the next arg from the list | |
| 389 CLI_argumentIsolation( curArgs, &arg1Ptr, &arg2Ptr ); | |
| 390 | |
| 391 // Single Arg | |
| 392 if ( *arg1Ptr == '\0' ) | |
| 393 goto cmd; | |
| 394 | |
| 395 // TODO Deal with a0 | |
| 396 cmd: | |
| 397 info_msg("Sending - "); | |
| 398 printHex( cmd ); | |
| 399 print( NL ); | |
| 400 LCD_writeControlReg( cmd ); | |
| 401 } | |
| 402 |