S777xx support + LED brightness - release

components/display/core/gds.c

@@ -9,22 +9,37 @@
 #include <string.h>
 #include <ctype.h>
 #include <stdint.h>
+#include <math.h>
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "driver/gpio.h"
+#include "driver/ledc.h"
 #include "esp_log.h"
 
 #include "gds.h"
 #include "gds_private.h"
 
 static struct GDS_Device Display;
+static struct GDS_BacklightPWM PWMConfig;
 
 static char TAG[] = "gds";
 
-struct GDS_Device* GDS_AutoDetect( char *Driver, GDS_DetectFunc* DetectFunc[] ) {
+struct GDS_Device* GDS_AutoDetect( char *Driver, GDS_DetectFunc* DetectFunc[], struct GDS_BacklightPWM* PWM ) {
+	if (!Driver) return NULL;
+	if (PWM) PWMConfig = *PWM;
+	
 	for (int i = 0; DetectFunc[i]; i++) {
 		if (DetectFunc[i](Driver, &Display)) {
-			ESP_LOGD(TAG, "Detected driver %p", &Display);
+			if (PWM && PWM->Init) {
+				ledc_timer_config_t PWMTimer = {
+						.duty_resolution = LEDC_TIMER_13_BIT,
+						.freq_hz = 5000,                   
+						.speed_mode = LEDC_HIGH_SPEED_MODE,
+						.timer_num = PWMConfig.Timer,
+					};
+				ledc_timer_config(&PWMTimer);
+			}	
+			ESP_LOGD(TAG, "Detected driver %p with PWM %d", &Display, PWM ? PWM->Init : 0);			
 			return &Display;
 		}	
 	}
@@ -165,6 +180,22 @@ bool GDS_Init( struct GDS_Device* Device ) {
 		NullCheck( Device->Framebuffer, return false );
 	}	
 	
+	if (Device->Backlight.Pin >= 0) {
+		Device->Backlight.Channel = PWMConfig.Channel++;
+		Device->Backlight.PWM = PWMConfig.Max - 1;
+
+		ledc_channel_config_t PWMChannel = {
+            .channel    = Device->Backlight.Channel,
+            .duty       = Device->Backlight.PWM,
+            .gpio_num   = Device->Backlight.Pin,
+            .speed_mode = LEDC_HIGH_SPEED_MODE,
+            .hpoint     = 0,
+            .timer_sel  = PWMConfig.Timer,
+        };
+		
+		ledc_channel_config(&PWMChannel);
+	}
+	
 	bool Res = Device->Init( Device );
 	if (!Res && Device->Framebuffer) free(Device->Framebuffer);
 	return Res;
@@ -196,7 +227,15 @@ int GDS_GrayMap( struct GDS_Device* Device, uint8_t Level) {
 	return -1;
 }
 
-void GDS_SetContrast( struct GDS_Device* Device, uint8_t Contrast ) { if (Device->SetContrast) Device->SetContrast( Device, Contrast); }
+void GDS_SetContrast( struct GDS_Device* Device, uint8_t Contrast ) { 
+	if (Device->SetContrast) Device->SetContrast( Device, Contrast ); 
+	else if (Device->Backlight.Pin >= 0) {
+		Device->Backlight.PWM = PWMConfig.Max * powf(Contrast / 255.0, 3);
+		ledc_set_duty( LEDC_HIGH_SPEED_MODE, Device->Backlight.Channel, Device->Backlight.PWM );
+		ledc_update_duty( LEDC_HIGH_SPEED_MODE, Device->Backlight.Channel );		
+	}
+}
+	
 void GDS_SetHFlip( struct GDS_Device* Device, bool On ) { if (Device->SetHFlip) Device->SetHFlip( Device, On ); }
 void GDS_SetVFlip( struct GDS_Device* Device, bool On ) { if (Device->SetVFlip) Device->SetVFlip( Device, On ); }
 void GDS_SetDirty( struct GDS_Device* Device ) { Device->Dirty = true; }

components/display/core/gds.h

@@ -22,10 +22,14 @@ enum { GDS_MONO = 0, GDS_GRAYSCALE, GDS_RGB332, GDS_RGB444, GDS_RGB555, GDS_RGB5
 
 struct GDS_Device;
 struct GDS_FontDef;
+struct GDS_BacklightPWM { 
+	int Channel, Timer, Max;
+	bool Init;
+};
 
 typedef struct GDS_Device* GDS_DetectFunc(char *Driver, struct GDS_Device *Device);
 
-struct GDS_Device*	GDS_AutoDetect( char *Driver, GDS_DetectFunc* DetectFunc[] );
+struct GDS_Device*	GDS_AutoDetect( char *Driver, GDS_DetectFunc* DetectFunc[], struct GDS_BacklightPWM *PWM );
 
 void 	GDS_SetContrast( struct GDS_Device* Device, uint8_t Contrast );
 void 	GDS_DisplayOn( struct GDS_Device* Device );

components/display/core/gds_default_if.h

@@ -8,10 +8,10 @@ extern "C" {
 struct GDS_Device;
 
 bool GDS_I2CInit( int PortNumber, int SDA, int SCL, int speed );
-bool GDS_I2CAttachDevice( struct GDS_Device* Device, int Width, int Height, int I2CAddress, int RSTPin );
+bool GDS_I2CAttachDevice( struct GDS_Device* Device, int Width, int Height, int I2CAddress, int RSTPin, int BacklightPin );
 
 bool GDS_SPIInit( int SPI, int DC );
-bool GDS_SPIAttachDevice( struct GDS_Device* Device, int Width, int Height, int CSPin, int RSTPin, int Speed );
+bool GDS_SPIAttachDevice( struct GDS_Device* Device, int Width, int Height, int CSPin, int RSTPin, int Speed, int BacklightPin );
 
 #ifdef __cplusplus
 }

components/display/core/gds_private.h

@@ -72,6 +72,11 @@ typedef struct spi_device_t* spi_device_handle_t;
 
 struct GDS_Device {
 	uint8_t IF;
+	int8_t RSTPin;
+	struct {
+		int8_t Pin, Channel;
+		int PWM;	
+	} Backlight;
 	union {
 		// I2C Specific
 		struct {
@@ -80,11 +85,10 @@ struct GDS_Device {
 		// SPI specific
 		struct {
 			spi_device_handle_t SPIHandle;
-			int8_t RSTPin;
 			int8_t CSPin;
 		};
 	};	
-
+	
     // cooked text mode
 	struct {
 		int16_t Y, Space;

components/display/core/ifaces/default_if_i2c.c

@@ -66,13 +66,14 @@ bool GDS_I2CInit( int PortNumber, int SDA, int SCL, int Speed ) {
  * 
  * Returns true on successful init of display.
  */
-bool GDS_I2CAttachDevice( struct GDS_Device* Device, int Width, int Height, int I2CAddress, int RSTPin ) {
+bool GDS_I2CAttachDevice( struct GDS_Device* Device, int Width, int Height, int I2CAddress, int RSTPin, int BacklightPin ) {
     NullCheck( Device, return false );
 
     Device->WriteCommand = I2CDefaultWriteCommand;
     Device->WriteData = I2CDefaultWriteData;
     Device->Address = I2CAddress;
     Device->RSTPin = RSTPin;
+	Device->Backlight.Pin = BacklightPin;	
 	Device->IF = GDS_IF_I2C;
 	Device->Width = Width;
 	Device->Height = Height;

components/display/core/ifaces/default_if_spi.c

@@ -34,7 +34,7 @@ bool GDS_SPIInit( int SPI, int DC ) {
     return true;
 }
 
-bool GDS_SPIAttachDevice( struct GDS_Device* Device, int Width, int Height, int CSPin, int RSTPin, int Speed ) {
+bool GDS_SPIAttachDevice( struct GDS_Device* Device, int Width, int Height, int CSPin, int RSTPin, int BackLightPin, int Speed ) {
     spi_device_interface_config_t SPIDeviceConfig;
     spi_device_handle_t SPIDevice;
 
@@ -44,7 +44,7 @@ bool GDS_SPIAttachDevice( struct GDS_Device* Device, int Width, int Height, int
 		ESP_ERROR_CHECK_NONFATAL( gpio_set_direction( CSPin, GPIO_MODE_OUTPUT ), return false );
 		ESP_ERROR_CHECK_NONFATAL( gpio_set_level( CSPin, 0 ), return false );
 	}	
-
+	
     memset( &SPIDeviceConfig, 0, sizeof( spi_device_interface_config_t ) );
 
     SPIDeviceConfig.clock_speed_hz = Speed > 0 ? Speed : SPI_MASTER_FREQ_8M;
@@ -59,6 +59,7 @@ bool GDS_SPIAttachDevice( struct GDS_Device* Device, int Width, int Height, int
     Device->SPIHandle = SPIDevice;
     Device->RSTPin = RSTPin;
     Device->CSPin = CSPin;
+	Device->Backlight.Pin = BackLightPin;	
 	Device->IF = GDS_IF_SPI;
 	Device->Width = Width;
 	Device->Height = Height;