Add support for the STM3210E-EVAL LCD backlight
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3748 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
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@ -414,6 +414,9 @@ STM3210E-EVAL-specific Configuration Options
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Default is 320x240 (this setting is informative only... not used).
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CONFIG_LCD_PORTRAIT - Define for 240x320 display support.
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Default is 320x240.
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CONFIG_LCD_BACKLIGHT - Define to support an adjustable backlight
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using timer 1. The granularity of the settings is determined
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by CONFIG_LCD_MAXPOWER. Requires CONFIG_STM32_TIM1.
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Configurations
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==============
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@ -465,6 +468,7 @@ Where <subdir> is one of the following:
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uses the Nokia 6100 LCD driver.
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CONFIG_STM32_CODESOURCERYW=y : CodeSourcery under Windows
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CONFIG_LCD_PORTRAIT=y : 240x320
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ostest:
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------
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@ -326,6 +326,7 @@ CONFIG_HAVE_LIBM=n
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CONFIG_DEBUG=n
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CONFIG_DEBUG_VERBOSE=n
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CONFIG_DEBUG_GRAPHICS=n
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CONFIG_DEBUG_LCD=n
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CONFIG_DEBUG_SYMBOLS=n
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CONFIG_MM_REGIONS=1
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CONFIG_ARCH_LOWPUTC=y
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@ -775,9 +776,13 @@ CONFIG_NX_MXCLIENTMSGS=16
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# Default is 320x240 (this setting is informative only... not necessary).
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# CONFIG_LCD_PORTRAIT - Define for 240x320 display support.
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# Default is 320x240.
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# CONFIG_LCD_BACKLIGHT - Define to support an adjustable backlight
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# using timer 1. The granularity of the settings is determined
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# by CONFIG_LCD_MAXPOWER. Requires CONFIG_STM32_TIM1.
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#
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CONFIG_LCD_LANDSCAPE=n
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CONFIG_LCD_PORTRAIT=y
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CONFIG_LCD_BACKLIGHT=n
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#
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# Settings for examples/uip
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@ -52,6 +52,8 @@
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#include <nuttx/lcd/lcd.h>
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#include "up_arch.h"
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#include "stm32.h"
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#include "stm32_internal.h"
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#include "stm3210e-internal.h"
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/**************************************************************************************
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@ -67,14 +69,17 @@
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/* Check power setting */
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#if !defined(CONFIG_LCD_MAXPOWER)
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# define CONFIG_LCD_MAXPOWER 1
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#if !defined(CONFIG_LCD_MAXPOWER) || CONFIG_LCD_MAXPOWER < 1
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# undef CONFIG_LCD_MAXPOWER
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# ifdef CONFIG_LCD_BACKLIGHT
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# define CONFIG_LCD_MAXPOWER 100
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# else
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# define CONFIG_LCD_MAXPOWER 1
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# endif
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#endif
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#if CONFIG_LCD_MAXPOWER != 1
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# warning "CONFIG_LCD_MAXPOWER exceeds supported maximum"
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# undef CONFIG_LCD_MAXPOWER
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# define CONFIG_LCD_MAXPOWER 1
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#if CONFIG_LCD_MAXPOWER > 255
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# error "CONFIG_LCD_MAXPOWER must be less than 256 to fit in uint8_t"
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#endif
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/* Check orientation */
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@ -87,6 +92,21 @@
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# define CONFIG_LCD_LANDSCAPE 1
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#endif
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/* Backlight */
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#ifdef CONFIG_LCD_BACKLIGHT
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# ifndef CONFIG_STM32_TIM1
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# error "CONFIG_STM32_TIM1 to use the LCD backlight controls"
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# endif
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# if CONFIG_LCD_MAXPOWER < 2
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# warning "A larger value of CONFIG_LCD_MAXPOWER is recommended"
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# endif
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#endif
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#if defined(CONFIG_STM32_TIM1_FULL_REMAP)
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# error "PA8 cannot be configured as TIM1 CH1 with full remap"
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#endif
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/* Define CONFIG_DEBUG_LCD to enable detailed LCD debug output. Verbose debug must
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* also be enabled.
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*/
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@ -233,6 +253,8 @@
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#define LCD_REG_193 0xc1
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#define LCD_REG_229 0xe5
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#define LCD_BL_TIMER_PERIOD 8999
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/* Debug ******************************************************************************/
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#ifdef CONFIG_DEBUG_LCD
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@ -263,8 +285,8 @@ struct stm3210e_dev_s
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/* Private LCD-specific information follows */
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bool spfd5408b; /* TRUE: LCD is SPFD5408B Controller */
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bool powered; /* TRUE: display on */
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bool spfd5408b; /* TRUE: LCD is SPFD5408B Controller */
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uint8_t power; /* Current power setting */
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};
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/**************************************************************************************
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@ -316,6 +338,11 @@ static int stm3210e_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
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static inline void stm3210e_lcdinitialize(void);
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static inline void stm3210e_lcdclear(void);
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#ifdef CONFIG_LCD_BACKLIGHT
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static void stm3210e_backlight(void);
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#else
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# define stm3210e_backlight()
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#endif
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/**************************************************************************************
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* Private Data
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@ -489,9 +516,6 @@ static int stm3210e_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *bu
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size_t npixels)
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{
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FAR const uint16_t *src = (FAR const uint16_t*)buffer;
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#ifndef CONFIG_LCD_LANDSCAPE
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fb_coord_t tmp;
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#endif
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int i;
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/* Buffer must be provided and aligned to a 16-bit address boundary */
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@ -664,7 +688,7 @@ static int stm3210e_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno
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static int stm3210e_getpower(struct lcd_dev_s *dev)
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{
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gvdbg("power: %d\n", 0);
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return g_lcddev.powered ? 1 : 0;
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return g_lcddev.power;
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}
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/**************************************************************************************
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@ -683,17 +707,31 @@ static int stm3210e_setpower(struct lcd_dev_s *dev, int power)
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/* Set new power level */
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if (power)
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if (power > 0)
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{
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/* Turn the display on: 262K color and display ON */
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uint32_t duty;
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/* Caclulate the new backlight duty. It is a faction of the timer1
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* period based on the ration of the current power setting to the
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* maximum power setting.
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*/
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duty = ((uint32_t)LCD_BL_TIMER_PERIOD * (uint32_t)power) / CONFIG_LCD_MAXPOWER;
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if (duty >= LCD_BL_TIMER_PERIOD)
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{
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duty = LCD_BL_TIMER_PERIOD - 1;
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}
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putreg16((uint16_t)duty, STM32_TIM1_CCR1);
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/* Then turn the display on */
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stm3210e_writereg(LCD_REG_7, g_lcddev.spfd5408b ? 0x0112 : 0x0173);
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g_lcddev.powered = true;
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g_lcddev.power = power;
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}
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else
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{
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stm3210e_writereg(LCD_REG_7, 0);
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g_lcddev.powered = false;
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g_lcddev.power = 0;
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}
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return OK;
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@ -948,6 +986,130 @@ static inline void stm3210e_lcdclear(void)
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}
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}
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/**************************************************************************************
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* Name: stm3210e_backlight
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*
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* Description:
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* The LCD backlight is driven from PA8 which must be configured as TIM1
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* CH1. TIM1 must then be configured to output a clock on PA8; the duty
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* of the clock determineds the backlight level.
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*
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**************************************************************************************/
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#ifdef CONFIG_LCD_BACKLIGHT
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static void stm3210e_backlight(void)
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{
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uint16_t ccmr;
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uint16_t ccer;
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uint16_t cr2;
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/* Configure PA8 as TIM1 CH1 output */
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stm32_configgpio(GPIO_TIM1_CH1OUT);
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/* Enabled timer 1 clocking */
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modifyreg32(STM32_RCC_APB2ENR, 0, RCC_APB2ENR_TIM1EN);
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/* Reset timer 1 */
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modifyreg32(STM32_RCC_APB2RSTR, 0, RCC_APB2RSTR_TIM1RST);
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modifyreg32(STM32_RCC_APB2RSTR, RCC_APB2RSTR_TIM1RST, 0);
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/* Reset the Counter Mode and set the clock division */
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putreg16(0, STM32_TIM1_CR1);
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/* Set the Autoreload value */
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putreg16(LCD_BL_TIMER_PERIOD, STM32_TIM1_ARR);
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/* Set the Prescaler value */
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putreg16(0, STM32_TIM1_PSC);
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/* Reset the Repetition Counter value */
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putreg16(0, STM32_TIM1_RCR);
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/* Generate an update event to reload the Prescaler value immediatly */
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putreg16(ATIM_EGR_UG, STM32_TIM1_EGR);
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/* Disable the Channel 1 */
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ccer = getreg16(STM32_TIM1_CCER);
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ccer &= ~ATIM_CCER_CC1E;
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putreg16(ccer, STM32_TIM1_CCER);
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/* Get the TIM1 CR2 register value */
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cr2 = getreg16(STM32_TIM1_CR2);
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/* Select the Output Compare Mode Bits */
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ccmr = getreg16(STM32_TIM1_CCMR1);
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ccmr &= ATIM_CCMR1_OC1M_MASK;
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ccmr |= (ATIM_CCMR_MODE_PWM1 << ATIM_CCMR1_OC1M_SHIFT);
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/* Set the capture compare register value (50% duty) */
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g_lcddev.power = (CONFIG_LCD_MAXPOWER + 1) / 2;
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putreg16((LCD_BL_TIMER_PERIOD + 1) / 2, STM32_TIM1_CCR1);
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/* Select the output polarity level == LOW and enable */
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ccer |= (ATIM_CCER_CC1E | ATIM_CCER_CC1P);
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/* Reset the Output N Polarity level */
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ccer &= ~(ATIM_CCER_CC1NP|ATIM_CCER_CC1NE);
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/* Reset the Ouput Compare and Output Compare N IDLE State */
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cr2 &= ~(ATIM_CR2_OIS1|ATIM_CR2_OIS1N);
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/* Write the timer configuration */
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putreg16(cr2, STM32_TIM1_CR2);
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putreg16(ccmr, STM32_TIM1_CCMR1);
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putreg16(ccer, STM32_TIM1_CCER);
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/* Set the auto preload enable bit */
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modifyreg16(STM32_TIM1_CR1, 0, ATIM_CR1_ARPE);
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/* Enable Backlight Timer */
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ccer |= ATIM_CR1_CEN;
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putreg16(ccer, STM32_TIM1_CCER);
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/* Dump timer1 registers */
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lcddbg("APB2ENR: %08x\n", getreg32(STM32_RCC_APB2ENR));
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lcddbg("CR1: %04x\n", getreg32(STM32_TIM1_CR1));
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lcddbg("CR2: %04x\n", getreg32(STM32_TIM1_CR2));
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lcddbg("SMCR: %04x\n", getreg32(STM32_TIM1_SMCR));
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lcddbg("DIER: %04x\n", getreg32(STM32_TIM1_DIER));
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lcddbg("SR: %04x\n", getreg32(STM32_TIM1_SR));
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lcddbg("EGR: %04x\n", getreg32(STM32_TIM1_EGR));
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lcddbg("CCMR1: %04x\n", getreg32(STM32_TIM1_CCMR1));
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lcddbg("CCMR2: %04x\n", getreg32(STM32_TIM1_CCMR2));
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lcddbg("CCER: %04x\n", getreg32(STM32_TIM1_CCER));
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lcddbg("CNT: %04x\n", getreg32(STM32_TIM1_CNT));
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lcddbg("PSC: %04x\n", getreg32(STM32_TIM1_PSC));
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lcddbg("ARR: %04x\n", getreg32(STM32_TIM1_ARR));
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lcddbg("RCR: %04x\n", getreg32(STM32_TIM1_RCR));
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lcddbg("CCR1: %04x\n", getreg32(STM32_TIM1_CCR1));
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lcddbg("CCR2: %04x\n", getreg32(STM32_TIM1_CCR2));
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lcddbg("CCR3: %04x\n", getreg32(STM32_TIM1_CCR3));
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lcddbg("CCR4: %04x\n", getreg32(STM32_TIM1_CCR4));
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lcddbg("CCR4: %04x\n", getreg32(STM32_TIM1_CCR4));
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lcddbg("CCR4: %04x\n", getreg32(STM32_TIM1_CCR4));
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lcddbg("DMAR: %04x\n", getreg32(STM32_TIM1_DMAR));
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}
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#endif
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/**************************************************************************************
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* Public Functions
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**************************************************************************************/
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@ -978,6 +1140,10 @@ int up_lcdinitialize(void)
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/* Clear the display */
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stm3210e_lcdclear();
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/* Configure the backlight */
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stm3210e_backlight();
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return OK;
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}
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