From ec6e2d16c68507a64b051b3118e907f857906f62 Mon Sep 17 00:00:00 2001
From: draradech <kasten.m@gmx.de>
Date: Thu, 22 Aug 2019 15:50:13 +0200
Subject: [PATCH] control display backlight brightness (epic part)
---
epicardium/epicardium.h | 12 +++++++
epicardium/modules/display.c | 11 +++++++
lib/card10/display.c | 63 ++----------------------------------
lib/gfx/GUI_DEV/DEV_Config.c | 55 +++++++++++++++++++++++++++++++
lib/gfx/GUI_DEV/DEV_Config.h | 3 +-
5 files changed, 82 insertions(+), 62 deletions(-)
diff --git a/epicardium/epicardium.h b/epicardium/epicardium.h
index 9bc91189..12acffb8 100644
--- a/epicardium/epicardium.h
+++ b/epicardium/epicardium.h
@@ -53,6 +53,7 @@ typedef _Bool bool;
#define API_DISP_CIRC 0x27
#define API_DISP_PIXEL 0x28
#define API_DISP_FRAMEBUFFER 0x29
+#define API_DISP_BACKLIGHT 0x2a
/* API_BATTERY_VOLTAGE 0x30 */
#define API_BATTERY_CURRENT 0x31
@@ -1333,6 +1334,17 @@ API(API_DISP_CIRC,
API(API_DISP_FRAMEBUFFER, int epic_disp_framebuffer(union disp_framebuffer *fb));
+/**
+ * Set the backlight brightness value
+ *
+ * :param brightness: brightness from 0 - 1000
+ * :return: ``0`` on success or negative value in case of an error:
+ *
+ * - ``-EBUSY``: Display was already locked from another task.
+ */
+API(API_DISP_BACKLIGHT, int epic_disp_backlight(uint16_t brightness));
+
+
/**
* Start continuous readout of the light sensor. Will read light level
* at preconfigured interval and make it available via `epic_light_sensor_get()`.
diff --git a/epicardium/modules/display.c b/epicardium/modules/display.c
index b6bf3624..c8dc5149 100644
--- a/epicardium/modules/display.c
+++ b/epicardium/modules/display.c
@@ -171,6 +171,17 @@ int epic_disp_framebuffer(union disp_framebuffer *fb)
return 0;
}
+int epic_disp_backlight(uint16_t brightness)
+{
+ int cl = check_lock();
+ if (cl < 0) {
+ return cl;
+ }
+
+ LCD_SetBacklight(brightness);
+ return 0;
+}
+
int epic_disp_open()
{
TaskHandle_t task = xTaskGetCurrentTaskHandle();
diff --git a/lib/card10/display.c b/lib/card10/display.c
index 52bca138..6bf37a0d 100644
--- a/lib/card10/display.c
+++ b/lib/card10/display.c
@@ -4,77 +4,19 @@
#include "textbuffer.h"
#include "gpio.h"
-#include "tmr.h"
#include "portexpander.h"
#include "MAX77650-Arduino-Library.h"
#include <stdint.h>
#include <stdio.h>
+
/***** Globals *****/
const gpio_cfg_t DEV_DC_PIN = { PORT_1, PIN_6, GPIO_FUNC_OUT, GPIO_PAD_NONE };
struct gfx_region display_screen;
struct txt_buffer display_textb;
-// Parameters for PWM output
-#define PORT_PWM PORT_0 // port
-#define PIN_PWM PIN_28 // pin
-#define FREQ 200 // (Hz)
-//#define DUTY_CYCLE 75 // (%)
-#define DUTY_CYCLE 20 // (%)
-#define PWM_TIMER MXC_TMR4 // must change PORT_PWM and PIN_PWM if changed
-
/***** Functions *****/
-void PWM_Output(void)
-{
- // Declare variables
- gpio_cfg_t gpio_pwm; // to configure GPIO
- tmr_cfg_t tmr; // to congigure timer
- tmr_pwm_cfg_t tmr_pwm; // for configure PWM
- unsigned int period_ticks = PeripheralClock / FREQ;
- unsigned int duty_ticks = period_ticks * DUTY_CYCLE / 100;
-
- // Congfigure GPIO port and pin for PWM
- gpio_pwm.func = GPIO_FUNC_ALT4;
- gpio_pwm.port = PORT_PWM;
- gpio_pwm.mask = PIN_PWM;
- gpio_pwm.pad = GPIO_PAD_PULL_DOWN;
-
- if (GPIO_Config(&gpio_pwm) != E_NO_ERROR) {
- printf("Failed GPIO_Config for pwm.\n");
- }
-
- /*
- Steps for configuring a timer for PWM mode:
- 1. Disable the timer
- 2. Set the prescale value
- 3. Configure the timer for PWM mode
- 4. Set polarity, pwm parameters
- 5. Enable Timer
- */
-
- TMR_Disable(PWM_TIMER);
-
- TMR_Init(PWM_TIMER, TMR_PRES_1, 0);
-
- tmr.mode = TMR_MODE_PWM;
- tmr.cmp_cnt = period_ticks;
- tmr.pol = 0;
- TMR_Config(PWM_TIMER, &tmr);
-
- tmr_pwm.pol = 1;
- tmr_pwm.per_cnt = period_ticks;
- tmr_pwm.duty_cnt = duty_ticks;
-
- if (TMR_PWMConfig(PWM_TIMER, &tmr_pwm) != E_NO_ERROR) {
- printf("Failed TMR_PWMConfig.\n");
- }
-
- TMR_Enable(PWM_TIMER);
-
- printf("PWM started.\n");
-}
-
void display_set_reset_pin(uint8_t state)
{
if (!portexpander_detected()) {
@@ -95,8 +37,7 @@ void display_init(void)
GPIO_Config(&DEV_DC_PIN);
- PWM_Output();
- LCD_SetBacklight(500);
+ LCD_SetBacklight(200);
LCD_Init();
display_screen = gfx_screen(LCD_framebuffer());
diff --git a/lib/gfx/GUI_DEV/DEV_Config.c b/lib/gfx/GUI_DEV/DEV_Config.c
index 099ce0a4..044ca00b 100644
--- a/lib/gfx/GUI_DEV/DEV_Config.c
+++ b/lib/gfx/GUI_DEV/DEV_Config.c
@@ -58,3 +58,58 @@ void lcd_write(uint8_t *data, int size)
SPI_MasterTrans(SPI, &req);
}
+// Parameters for PWM output
+#define PORT_PWM PORT_0 // port
+#define PIN_PWM PIN_28 // pin
+#define FREQ 200 // (Hz)
+#define PWM_TIMER MXC_TMR4 // must change PORT_PWM and PIN_PWM if changed
+void DEV_Set_BL(uint16_t _Value)
+{
+ // Declare variables
+ gpio_cfg_t gpio_pwm; // to configure GPIO
+ tmr_cfg_t tmr; // to congigure timer
+ tmr_pwm_cfg_t tmr_pwm; // for configure PWM
+ unsigned int period_ticks = PeripheralClock / FREQ;
+ unsigned int duty_ticks = period_ticks * _Value / 1000;
+
+ // Congfigure GPIO port and pin for PWM
+ gpio_pwm.func = GPIO_FUNC_ALT4;
+ gpio_pwm.port = PORT_PWM;
+ gpio_pwm.mask = PIN_PWM;
+ gpio_pwm.pad = GPIO_PAD_PULL_DOWN;
+
+ if (GPIO_Config(&gpio_pwm) != E_NO_ERROR) {
+ printf("Failed GPIO_Config for pwm.\n");
+ }
+
+ /*
+ Steps for configuring a timer for PWM mode:
+ 1. Disable the timer
+ 2. Set the prescale value
+ 3. Configure the timer for PWM mode
+ 4. Set polarity, pwm parameters
+ 5. Enable Timer
+ */
+
+ TMR_Disable(PWM_TIMER);
+
+ TMR_Init(PWM_TIMER, TMR_PRES_1, 0);
+
+ tmr.mode = TMR_MODE_PWM;
+ tmr.cmp_cnt = period_ticks;
+ tmr.pol = 0;
+ TMR_Config(PWM_TIMER, &tmr);
+
+ tmr_pwm.pol = 1;
+ tmr_pwm.per_cnt = period_ticks;
+ tmr_pwm.duty_cnt = duty_ticks;
+
+ if (TMR_PWMConfig(PWM_TIMER, &tmr_pwm) != E_NO_ERROR) {
+ printf("Failed TMR_PWMConfig.\n");
+ }
+
+ TMR_Enable(PWM_TIMER);
+
+ printf("PWM started.\n");
+}
+
diff --git a/lib/gfx/GUI_DEV/DEV_Config.h b/lib/gfx/GUI_DEV/DEV_Config.h
index 64487005..cbc4c5f6 100644
--- a/lib/gfx/GUI_DEV/DEV_Config.h
+++ b/lib/gfx/GUI_DEV/DEV_Config.h
@@ -34,6 +34,7 @@
#include "Debug.h"
#include "spi.h"
+#include "tmr.h"
#include "tmr_utils.h"
#include <stdint.h>
#include <stdio.h>
@@ -72,7 +73,7 @@ void display_set_reset_pin(uint8_t state);
**/
//#define DEV_Set_BL(_Value) DEV_BL_PIN= _Value
-#define DEV_Set_BL(_Value)
+void DEV_Set_BL(uint16_t _Value);
/*-----------------------------------------------------------------------------*/
#endif
--
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