Mercurial > ~darius > hgwebdir.cgi > stm32test

comparison lcd.c @ 5:efa2c22266e3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
PWM control LED backlight. Not sure why the AFIO clock needs to be on for this but not, say USART.
author Daniel O'Connor <darius@dons.net.au>
date Fri, 06 Jan 2012 09:46:28 +1030
parents 2c87e30c982d
children 9404b9869c27
comparison
equal deleted inserted replaced
4:2c87e30c982d 5:efa2c22266e3
60 #include "lcd.h" 60 #include "lcd.h"
61 61
62 #define Bank1_LCD_C ((uint32_t)0x60000000) /* Register Address */ 62 #define Bank1_LCD_C ((uint32_t)0x60000000) /* Register Address */
63 #define Bank1_LCD_D ((uint32_t)0x60020000) /* Data Address */ 63 #define Bank1_LCD_D ((uint32_t)0x60020000) /* Data Address */
64 64
65 unsigned long colour1 = 0;
66
67 void 65 void
68 LCD_WR_Reg(uint16_t index, uint16_t val) { 66 LCD_WR_Reg(uint16_t index, uint16_t val) {
69 *(__IO uint16_t *)(Bank1_LCD_C) = index; 67 *(__IO uint16_t *)(Bank1_LCD_C) = index;
70 *(__IO uint16_t *)(Bank1_LCD_D) = val; 68 *(__IO uint16_t *)(Bank1_LCD_D) = val;
71 } 69 }
220 LCD_init(void) { 218 LCD_init(void) {
221 GPIO_InitTypeDef GPIO_InitStructure; 219 GPIO_InitTypeDef GPIO_InitStructure;
222 SPI_InitTypeDef SPI_InitStructure; 220 SPI_InitTypeDef SPI_InitStructure;
223 FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure; 221 FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;
224 FSMC_NORSRAMTimingInitTypeDef p; 222 FSMC_NORSRAMTimingInitTypeDef p;
225 #if 0
226 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; 223 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
227 TIM_OCInitTypeDef TIM_OCInitStructure;
228 TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
229 #endif
230 uint16_t id; 224 uint16_t id;
231 225
232 /* Enable FSMC clock */ 226 /* Enable FSMC clock */
233 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE); 227 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);
234 228
235 /* Enable GPIOD clock */ 229 /* Enable GPIOD clock */
236 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE); 230 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
231
232 /* Enable alternate function IO clock */
233 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
237 234
238 /* Configures LCD Control lines (FSMC Pins) in alternate function Push-Pull mode. 235 /* Configures LCD Control lines (FSMC Pins) in alternate function Push-Pull mode.
239 * 236 *
240 * PD0(D2), PD1(D3), PD4(NOE), PD5(NWE), PD7(NE1/CS), PD8(D13), PD9(D14), 237 * PD0(D2), PD1(D3), PD4(NOE), PD5(NWE), PD7(NE1/CS), PD8(D13), PD9(D14),
241 * PD10(D15), PD11(A16/RS) PD14(D0), PD15(D1) 238 * PD10(D15), PD11(A16/RS) PD14(D0), PD15(D1)
252 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | 249 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |
253 GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15; 250 GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
254 GPIO_Init(GPIOE, &GPIO_InitStructure); 251 GPIO_Init(GPIOE, &GPIO_InitStructure);
255 252
256 /* Configure backlight control (PD13/FSMC_A18 remapped to TIM4_CH2) */ 253 /* Configure backlight control (PD13/FSMC_A18 remapped to TIM4_CH2) */
257 #if 0
258 /* Enable TIM4 clock */ 254 /* Enable TIM4 clock */
259 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); 255 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
260 256
261 /* Enable timer function */ 257 /* Enable timer function
258 * Note source clock is SYSCLK / 2 = 36MHz
259 */
262 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13; 260 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
263 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 261 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
264 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 262 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
265 GPIO_Init(GPIOD, &GPIO_InitStructure); 263 GPIO_Init(GPIOD, &GPIO_InitStructure);
266 264
269 267
270 /* Reset TIM4 */ 268 /* Reset TIM4 */
271 TIM_DeInit(TIM4); 269 TIM_DeInit(TIM4);
272 270
273 /* Time Base configuration */ 271 /* Time Base configuration */
274 TIM_TimeBaseStructure.TIM_Prescaler = 0x00; 272 TIM_TimeBaseStructure.TIM_Period = 999;
275 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 273 TIM_TimeBaseStructure.TIM_Prescaler = 0;
276 TIM_TimeBaseStructure.TIM_Period = 0x8000; 274 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
277 TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; 275 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Down;
278 TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0; 276
279 TIM_TimeBaseInit(TIM4 ,&TIM_TimeBaseStructure); 277 TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
280 278
281 /* Channel 1, 2, 3 and 4 Configuration in PWM mode */ 279 /* Init to full brightness */
282 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; 280 lcd_setpwm(1000);
283 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; 281
284 TIM_OCInitStructure.TIM_Pulse = 0; 282 /* Enable timer */
285 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; 283 TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);
286 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; 284 TIM_ARRPreloadConfig(TIM4, ENABLE);
287 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; 285 TIM_Cmd(TIM4, ENABLE);
288 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
289 TIM_OC2Init(TIM4, &TIM_OCInitStructure);
290
291 /* Automatic Output enable, Break, dead time and lock configuration*/
292 TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
293 TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
294 TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
295 TIM_BDTRInitStructure.TIM_DeadTime = 0x75;
296 TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable;
297 TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
298 TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
299
300 TIM_BDTRConfig(TIM4, &TIM_BDTRInitStructure);
301
302 /* TIM1 counter enable */
303 TIM_Cmd(TIM4,ENABLE);
304 #else
305 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
306 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
307 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
308 GPIO_Init(GPIOD, &GPIO_InitStructure);
309
310 GPIO_SetBits(GPIOD, GPIO_Pin_13);
311 #endif
312 286
313 /* Configure reset pin (PE1) as GPIO out PP */ 287 /* Configure reset pin (PE1) as GPIO out PP */
314 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; 288 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
315 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 289 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
316 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; 290 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
442 416
443 /* Fill panel with white */ 417 /* Fill panel with white */
444 LCD_WR_Reg(0x20, 0); 418 LCD_WR_Reg(0x20, 0);
445 LCD_WR_Reg(0x21, 0x013f); 419 LCD_WR_Reg(0x21, 0x013f);
446 *(__IO uint16_t *)(Bank1_LCD_C) = 34; 420 *(__IO uint16_t *)(Bank1_LCD_C) = 34;
447 for (colour1 = 0; colour1 < 76800; colour1++) { 421 for (uint32_t i = 0; i < 320 * 240; i++) {
448 LCD_WR_Data(0xffff); 422 LCD_WR_Data(0xffff);
449 } 423 }
450 colour1 = 0;
451 424
452 /* Configure touch screen controller 425 /* Configure touch screen controller
453 * 426 *
454 * Connected to SPI1 which is shared with the AT45DB161D. 427 * Connected to SPI1 which is shared with the AT45DB161D.
455 * 428 *
496 469
497 /* SPI1 enable */ 470 /* SPI1 enable */
498 SPI_Cmd(SPI1, ENABLE); 471 SPI_Cmd(SPI1, ENABLE);
499 472
500 } 473 }
474
475 void
476 lcd_setpwm(uint16_t val) {
477 TIM_OCInitTypeDef TIM_OCInitStructure;
478
479 /* Channel 2 configuration in PWM mode */
480 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
481 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
482 TIM_OCInitStructure.TIM_Pulse = val;
483 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
484
485 TIM_OC2Init(TIM4, &TIM_OCInitStructure);
486
487 }