Back-light PWM

app/app.c

@@ -1611,11 +1611,16 @@ void APP_TimeSlice500ms(void)
 		}
 	#endif
 
-	if (gBacklightCountdown > 0 && !gAskToSave && gCssScanMode == CSS_SCAN_MODE_OFF)
+	if (gBacklightCountdown > 0 && 
-		if (gScreenToDisplay != DISPLAY_MENU || GetCurrentMenuId() != MENU_ABR) // don't turn off backlight if user is in backlight menu option
+		!gAskToSave && 
-			if (--gBacklightCountdown == 0)
+		gCssScanMode == CSS_SCAN_MODE_OFF &&
-				if (gEeprom.BACKLIGHT < (ARRAY_SIZE(gSubMenu_BACKLIGHT) - 1))
+		// don't turn off backlight if user is in backlight menu option
-					GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);   // turn backlight off
+		!(gScreenToDisplay == DISPLAY_MENU && (GetCurrentMenuId() == MENU_ABR || GetCurrentMenuId() == MENU_ABR_MAX)) 
+		) 
+	{	if (--gBacklightCountdown == 0)
+				if (gEeprom.BACKLIGHT_TIME < (ARRAY_SIZE(gSubMenu_BACKLIGHT) - 1)) // backlight is not set to be always on
+					BACKLIGHT_TurnOff();   // turn backlight off
+	}
 
 	if (gSerialConfigCountDown_500ms > 0)
 	{
@@ -1687,10 +1692,9 @@ void APP_TimeSlice500ms(void)
 			{
 				gMenuCountdown = 0;
 
-				if (gEeprom.BACKLIGHT == 0)
+				if (gEeprom.BACKLIGHT_TIME == 0) // backlight always off
 				{
-					gBacklightCountdown = 0;
+					BACKLIGHT_TurnOff();	// turn the backlight OFF
-					GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);	// turn the backlight OFF
 				}
 
 				if (gInputBoxIndex > 0 || gDTMF_InputMode)
@@ -1807,8 +1811,8 @@ void APP_TimeSlice500ms(void)
 
 						ST7565_HardwareReset();
 
-						if (gEeprom.BACKLIGHT < (ARRAY_SIZE(gSubMenu_BACKLIGHT) - 1))
+						if (gEeprom.BACKLIGHT_TIME < (ARRAY_SIZE(gSubMenu_BACKLIGHT) - 1))
-							GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);  // turn the backlight off
+							BACKLIGHT_TurnOff();  // turn the backlight off
 					}
 					#ifdef ENABLE_VOICE
 						else
@@ -1907,9 +1911,7 @@ void APP_TimeSlice500ms(void)
 
 static void APP_ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 {
-	const bool backlight_was_on = GPIO_CheckBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);
+	if (Key == KEY_EXIT && !BACKLIGHT_IsOn() && gEeprom.BACKLIGHT_TIME > 0)
-
-	if (Key == KEY_EXIT && !backlight_was_on && gEeprom.BACKLIGHT > 0)
 	{	// just turn the light on for now so the user can see what's what
 		BACKLIGHT_TurnOn();
 		gBeepToPlay = BEEP_NONE;
@@ -1959,9 +1961,16 @@ static void APP_ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 	}
 	else // key pressed or held
 	{
-		if (Key != KEY_PTT || gSetting_backlight_on_tx_rx == BACKLIGHT_ON_TR_TX 
+		const uint8_t s = gSetting_backlight_on_tx_rx;
-		                   || gSetting_backlight_on_tx_rx == BACKLIGHT_ON_TR_TXRX)
+		const int m = GetCurrentMenuId();
+		if 	(	//not when PTT and the backlight shouldn't turn on on TX
+				!(Key == KEY_PTT && s != BACKLIGHT_ON_TR_TX && s != BACKLIGHT_ON_TR_TXRX) 
+				// not in the backlight menu
+				&& !(gScreenToDisplay == DISPLAY_MENU && ( m == MENU_ABR || m == MENU_ABR_MAX || m == MENU_ABR_MIN))
+			) 
+		{
 			BACKLIGHT_TurnOn();
+		}
 
 		if (Key == KEY_EXIT && bKeyHeld)
 		{	// exit key held pressed

app/menu.c

@@ -117,6 +117,16 @@ int MENU_GetLimits(uint8_t menu_id, int32_t *pMin, int32_t *pMax)
 			*pMax = ARRAY_SIZE(gSubMenu_BACKLIGHT) - 1;
 			break;
 
+		case MENU_ABR_MIN:
+			*pMin = 0;
+			*pMax = 9;
+			break;				
+
+		case MENU_ABR_MAX:
+			*pMin = 1;
+			*pMax = 10;
+			break;	
+
 		case MENU_F_LOCK:
 			*pMin = 0;
 			*pMax = ARRAY_SIZE(gSubMenu_F_LOCK) - 1;
@@ -516,7 +526,17 @@ void MENU_AcceptSetting(void)
 		#endif
 
 		case MENU_ABR:
-			gEeprom.BACKLIGHT = gSubMenuSelection;
+			gEeprom.BACKLIGHT_TIME = gSubMenuSelection;
+			break;
+
+		case MENU_ABR_MIN:
+			gEeprom.BACKLIGHT_MIN = gSubMenuSelection;
+			gEeprom.BACKLIGHT_MAX = MAX(gSubMenuSelection + 1 , gEeprom.BACKLIGHT_MAX);
+			break;
+
+		case MENU_ABR_MAX:
+			gEeprom.BACKLIGHT_MAX = gSubMenuSelection;
+			gEeprom.BACKLIGHT_MIN = MIN(gSubMenuSelection - 1, gEeprom.BACKLIGHT_MIN);
 			break;			
 
 		case MENU_ABR_ON_TX_RX:
@@ -934,17 +954,22 @@ void MENU_ShowCurrentSetting(void)
 			gSubMenuSelection = gEeprom.BATTERY_SAVE;
 			break;
 
-		#ifdef ENABLE_VOX
+#ifdef ENABLE_VOX
-			case MENU_VOX:
+		case MENU_VOX:
-				gSubMenuSelection = gEeprom.VOX_SWITCH ? gEeprom.VOX_LEVEL + 1 : 0;
+			gSubMenuSelection = gEeprom.VOX_SWITCH ? gEeprom.VOX_LEVEL + 1 : 0;
-				break;
+			break;
-		#endif
+#endif
 
 		case MENU_ABR:
-			gSubMenuSelection = gEeprom.BACKLIGHT;
+			gSubMenuSelection = gEeprom.BACKLIGHT_TIME;
+			break;
 
-			gBacklightCountdown = 0;
+		case MENU_ABR_MIN:
-			GPIO_SetBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);  	// turn the backlight ON while in backlight menu
+			gSubMenuSelection = gEeprom.BACKLIGHT_MIN;
+			break;
+
+		case MENU_ABR_MAX:
+			gSubMenuSelection = gEeprom.BACKLIGHT_MAX;
 			break;		
 
 		case MENU_ABR_ON_TX_RX:
@@ -963,11 +988,11 @@ void MENU_ShowCurrentSetting(void)
 			gSubMenuSelection = gEeprom.TX_TIMEOUT_TIMER;
 			break;
 
-		#ifdef ENABLE_VOICE
+#ifdef ENABLE_VOICE
-			case MENU_VOICE:
+		case MENU_VOICE:
-				gSubMenuSelection = gEeprom.VOICE_PROMPT;
+			gSubMenuSelection = gEeprom.VOICE_PROMPT;
-				break;
+			break;
-		#endif
+#endif
 
 		case MENU_SC_REV:
 			gSubMenuSelection = gEeprom.SCAN_RESUME_MODE;
@@ -1001,11 +1026,11 @@ void MENU_ShowCurrentSetting(void)
 			gSubMenuSelection = gEeprom.MIC_SENSITIVITY;
 			break;
 
-		#ifdef ENABLE_AUDIO_BAR
+#ifdef ENABLE_AUDIO_BAR
-			case MENU_MIC_BAR:
+		case MENU_MIC_BAR:
-				gSubMenuSelection = gSetting_mic_bar;
+			gSubMenuSelection = gSetting_mic_bar;
-				break;
+			break;
-		#endif
+#endif
 
 		case MENU_COMPAND:
 			gSubMenuSelection = gTxVfo->Compander;
@@ -1081,11 +1106,11 @@ void MENU_ShowCurrentSetting(void)
 			gSubMenuSelection = gTxVfo->AM_mode;
 			break;
 
-		#ifdef ENABLE_AM_FIX
+#ifdef ENABLE_AM_FIX
-			case MENU_AM_FIX:
+		case MENU_AM_FIX:
-				gSubMenuSelection = gSetting_AM_fix;
+			gSubMenuSelection = gSetting_AM_fix;
-				break;
+			break;
-		#endif
+#endif
 
 		#ifdef ENABLE_AM_FIX_TEST1
 			case MENU_AM_FIX_TEST1:
@@ -1377,10 +1402,9 @@ static void MENU_Key_EXIT(bool bKeyPressed, bool bKeyHeld)
 
 		gRequestDisplayScreen = DISPLAY_MAIN;
 
-		if (gEeprom.BACKLIGHT == 0)
+		if (gEeprom.BACKLIGHT_TIME == 0) // backlight set to always off
 		{
-			gBacklightCountdown = 0;
+			BACKLIGHT_TurnOff();	// turn the backlight OFF
-			GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);	// turn the backlight OFF
 		}
 	}
 	else
@@ -1658,10 +1682,9 @@ static void MENU_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)
 
 		gRequestDisplayScreen = DISPLAY_MENU;
 
-		if (GetCurrentMenuId() != MENU_ABR && gEeprom.BACKLIGHT == 0)
+		if (GetCurrentMenuId() != MENU_ABR && gEeprom.BACKLIGHT_TIME == 0) // backlight always off and not in the backlight menu
 		{
-			gBacklightCountdown = 0;
+			BACKLIGHT_TurnOff();
-			GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);	// turn the backlight OFF
 		}
 
 		return;

app/spectrum.c

@@ -14,7 +14,8 @@
  *     limitations under the License.
  */
 
-#include "../app/spectrum.h"
+#include "app/spectrum.h"
+#include "driver/backlight.h"
 
 struct FrequencyBandInfo {
     uint32_t lower;
@@ -493,9 +494,9 @@ static void ToggleListeningBW() {
 static void ToggleBacklight() {
   settings.backlightState = !settings.backlightState;
   if (settings.backlightState) {
-    GPIO_SetBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);
+    BACKLIGHT_TurnOn();
   } else {
-    GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);
+    BACKLIGHT_TurnOff();
   }
 }
 

app/uart.c

@@ -27,6 +27,7 @@
 #include "bsp/dp32g030/dma.h"
 #include "bsp/dp32g030/gpio.h"
 #include "driver/aes.h"
+#include "driver/backlight.h"
 #include "driver/bk4819.h"
 #include "driver/crc.h"
 #include "driver/eeprom.h"
@@ -238,7 +239,7 @@ static void CMD_0514(const uint8_t *pBuffer)
 	gSerialConfigCountDown_500ms = 12; // 6 sec
 	
 	// turn the LCD backlight off
-	GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);
+	BACKLIGHT_TurnOff();
 
 	SendVersion();
 }
@@ -413,7 +414,7 @@ static void CMD_052F(const uint8_t *pBuffer)
 	Timestamp = pCmd->Timestamp;
 
 	// turn the LCD backlight off
-	GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);
+	BACKLIGHT_TurnOff();
 
 	SendVersion();
 }

board.c

@@ -23,6 +23,7 @@
 #include "board.h"
 #include "bsp/dp32g030/gpio.h"
 #include "bsp/dp32g030/portcon.h"
+#include "bsp/dp32g030/pwmplus.h"
 #include "bsp/dp32g030/saradc.h"
 #include "bsp/dp32g030/syscon.h"
 #include "driver/adc.h"
@@ -94,8 +95,6 @@ void BOARD_GPIO_Init(void)
 		| GPIO_DIR_6_MASK // INPUT
 		);
 	GPIOB->DIR |= 0
-		// Back light
-		| GPIO_DIR_6_BITS_OUTPUT
 		// ST7565
 		| GPIO_DIR_9_BITS_OUTPUT
 		// ST7565 + SWD IO
@@ -189,8 +188,8 @@ void BOARD_PORTCON_Init(void)
 		| PORTCON_PORTB_SEL0_B7_MASK
 		);
 	PORTCON_PORTB_SEL0 |= 0
-		// Back light
+		// Back light PWM
-		| PORTCON_PORTB_SEL0_B6_BITS_GPIOB6
+		| PORTCON_PORTB_SEL0_B6_BITS_PWMP0_CH0
 		// SPI0 SSN
 		| PORTCON_PORTB_SEL0_B7_BITS_SPI0_SSN
 		;
@@ -471,6 +470,23 @@ void BOARD_PORTCON_Init(void)
 		;
 }
 
+static void BacklightPWM_Init()
+{
+	// 48MHz / 94 / 1024 ~ 500Hz
+	PWM_PLUS0_CLKSRC |= ((94) << 16);
+	PWM_PLUS0_PERIOD = 1023;
+
+	PWM_PLUS0_GEN = 	
+		PWMPLUS_GEN_CH0_OE_BITS_ENABLE |
+		PWMPLUS_GEN_CH0_OUTINV_BITS_ENABLE |
+		0;
+
+	PWM_PLUS0_CFG =  	
+		PWMPLUS_CFG_CNT_REP_BITS_ENABLE |
+		PWMPLUS_CFG_COUNTER_EN_BITS_ENABLE |
+		0;
+}
+
 void BOARD_ADC_Init(void)
 {
 	ADC_Config_t Config;
@@ -508,6 +524,7 @@ void BOARD_Init(void)
 {
 	BOARD_PORTCON_Init();
 	BOARD_GPIO_Init();
+	BacklightPWM_Init();
 	BOARD_ADC_Init();
 	ST7565_Init(true);
 	#ifdef ENABLE_FMRADIO
@@ -540,11 +557,13 @@ void BOARD_EEPROM_Init(void)
 
 	// 0E78..0E7F
 	EEPROM_ReadBuffer(0x0E78, Data, 8);
+	gEeprom.BACKLIGHT_MAX 		  = (Data[0] & 0xF) <= 10 ? (Data[0] & 0xF) : 10;
+	gEeprom.BACKLIGHT_MIN 		  = (Data[0] >> 4) < gEeprom.BACKLIGHT_MAX ? (Data[0] >> 4) : 0;
 	gEeprom.CHANNEL_DISPLAY_MODE  = (Data[1] < 4) ? Data[1] : MDF_FREQUENCY;    // 4 instead of 3 - extra display mode
 	gEeprom.CROSS_BAND_RX_TX      = (Data[2] < 3) ? Data[2] : CROSS_BAND_OFF;
 	gEeprom.BATTERY_SAVE          = (Data[3] < 5) ? Data[3] : 4;
 	gEeprom.DUAL_WATCH            = (Data[4] < 3) ? Data[4] : DUAL_WATCH_CHAN_A;
-	gEeprom.BACKLIGHT             = (Data[5] < ARRAY_SIZE(gSubMenu_BACKLIGHT)) ? Data[5] : 3;
+	gEeprom.BACKLIGHT_TIME        = (Data[5] < ARRAY_SIZE(gSubMenu_BACKLIGHT)) ? Data[5] : 3;
 	gEeprom.TAIL_NOTE_ELIMINATION = (Data[6] < 2) ? Data[6] : false;
 	gEeprom.VFO_OPEN              = (Data[7] < 2) ? Data[7] : true;
 

bsp/dp32g030/pwmplus.h

@@ -0,0 +1,146 @@
+#ifndef HARDWARE_DP32G030_PWMPLUS_H
+#define HARDWARE_DP32G030_PWMPLUS_H
+
+#define PWM_PLUS0_BASE_ADDR 0x400B4000U
+
+//---------------
+
+#define PWMPLUS_CFG                             0x00U
+
+#define PWMPLUS_CFG_COUNTER_EN_SHIFT            0U
+#define PWMPLUS_CFG_COUNTER_EN_WIDTH            1U
+#define PWMPLUS_CFG_COUNTER_EN_MASK             (((1U << PWMPLUS_CFG_COUNTER_EN_WIDTH) - 1U) << PWMPLUS_CFG_COUNTER_EN_SHIFT)
+#define PWMPLUS_CFG_COUNTER_EN_VALUE_ENABLE     1U
+#define PWMPLUS_CFG_COUNTER_EN_BITS_ENABLE      (PWMPLUS_CFG_COUNTER_EN_VALUE_ENABLE << PWMPLUS_CFG_COUNTER_EN_SHIFT)
+
+#define PWMPLUS_CFG_CNT_TYPE_SHIFT              1U
+
+#define PWMPLUS_CFG_CNT_REP_SHIFT               2U
+#define PWMPLUS_CFG_CNT_REP_WIDTH               1U
+#define PWMPLUS_CFG_CNT_REP_VALUE_ENABLE        1U
+#define PWMPLUS_CFG_CNT_REP_BITS_ENABLE         (PWMPLUS_CFG_CNT_REP_VALUE_ENABLE << PWMPLUS_CFG_CNT_REP_SHIFT)
+
+#define PWMPLUS_CFG_OUT_MODE_SHIFT              3U
+#define PWMPLUS_CFG_OUT_MODE_VALUE_ENABLE       1U
+#define PWMPLUS_CFG_OUT_MODE_BITS_ENABLE        (PWMPLUS_CFG_OUT_MODE_VALUE_ENABLE << PWMPLUS_CFG_OUT_MODE_SHIFT)
+
+#define PWMPLUS_CFG_AUTO_RELOAD_SHIFT           8U
+
+//---------------
+
+#define PWMPLUS_GEN                             0x04U
+
+#define PWMPLUS_GEN_CH0_OE_SHIFT                24U
+#define PWMPLUS_GEN_CH0_OE_WIDTH                1U
+#define PWMPLUS_GEN_CH0_OE_VALUE_ENABLE         1U
+#define PWMPLUS_GEN_CH0_OE_BITS_ENABLE          (PWMPLUS_GEN_CH0_OE_VALUE_ENABLE << PWMPLUS_GEN_CH0_OE_SHIFT)
+
+#define PWMPLUS_GEN_CH0_OUTINV_SHIFT            16U
+#define PWMPLUS_GEN_CH0_OUTINV_WIDTH            1U
+#define PWMPLUS_GEN_CH0_OUTINV_VALUE_ENABLE     1U
+#define PWMPLUS_GEN_CH0_OUTINV_BITS_ENABLE      (PWMPLUS_GEN_CH0_OUTINV_VALUE_ENABLE << PWMPLUS_GEN_CH0_OUTINV_SHIFT)
+
+#define PWMPLUS_GEN_CH0_START_SHIFT             8U
+#define PWMPLUS_GEN_CH0_START_WIDTH             1U
+#define PWMPLUS_GEN_CH0_START_VALUE_ENABLE      1U
+#define PWMPLUS_GEN_CH0_START_BITS_ENABLE       (PWMPLUS_GEN_CH0_START_VALUE_ENABLE << PWMPLUS_GEN_CH0_START_SHIFT)
+
+#define PWMPLUS_GEN_CH0_IDLE_SHIFT              0U
+#define PWMPLUS_GEN_CH0_IDLE_WIDTH              1U
+#define PWMPLUS_GEN_CH0_IDLE_VALUE_ENABLE       1U
+#define PWMPLUS_GEN_CH0_IDLE_BITS_ENABLE        (PWMPLUS_GEN_CH0_IDLE_VALUE_ENABLE << PWMPLUS_GEN_CH0_IDLE_SHIFT)
+
+//---------------
+
+#define PWMPLUS_CLKSRC      0x08U
+#define PWMPLUS_BRAKE_CFG   0x0CU
+#define PWMPLUS_MASK_LEV    0x10U
+#define PWMPLUS_PERIOD      0x1CU
+#define PWMPLUS_CH0_COMP    0x20U
+#define PWMPLUS_CH1_COMP    0x24U
+#define PWMPLUS_CH2_COMP    0x28U
+#define PWMPLUS_CH0_DT      0x30U
+#define PWMPLUS_CH1_DT      0x34U
+#define PWMPLUS_CH2_DT      0x38U
+#define PWMPLUS_TRIG_COMP   0x40U
+#define PWMPLUS_TRIG_CFG    0x44U
+#define PWMPLUS_IE          0x60U
+#define PWMPLUS_IF          0x64U
+#define PWMPLUS_SWLOAD      0x84U
+#define PWMPLUS_MASK_EN     0x88
+#define PWMPLUS_CNT_ST      0xE0
+#define PWMPLUS_BRAKE_ST    0xE4
+
+
+
+
+
+
+
+
+
+
+
+
+
+#define PWM_PLUS0_CFG_ADDR          (PWM_PLUS0_BASE_ADDR + PWMPLUS_CFG)
+#define PWM_PLUS0_CFG               (*(volatile uint32_t *)PWM_PLUS0_CFG_ADDR)
+
+#define PWM_PLUS0_GEN_ADDR          (PWM_PLUS0_BASE_ADDR + PWMPLUS_GEN)
+#define PWM_PLUS0_GEN               (*(volatile uint32_t *)PWM_PLUS0_GEN_ADDR)
+
+#define PWM_PLUS0_CLKSRC_ADDR       (PWM_PLUS0_BASE_ADDR + PWMPLUS_CLKSRC)
+#define PWM_PLUS0_CLKSRC            (*(volatile uint32_t *)PWM_PLUS0_CLKSRC_ADDR)
+
+#define PWM_PLUS0_BRAKE_CFG_ADDR    (PWM_PLUS0_BASE_ADDR + PWMPLUS_BRAKE_CFG)
+#define PWM_PLUS0_BRAKE_CFG         (*(volatile uint32_t *)PWM_PLUS0_BRAKE_CFG_ADDR)
+
+#define PWM_PLUS0_MASK_LEV_ADDR     (PWM_PLUS0_BASE_ADDR + PWMPLUS_MASK_LEV)
+#define PWM_PLUS0_MASK_LEV          (*(volatile uint32_t *)PWM_PLUS0_MASK_LEV_ADDR)
+
+#define PWM_PLUS0_PERIOD_ADDR       (PWM_PLUS0_BASE_ADDR + PWMPLUS_PERIOD)
+#define PWM_PLUS0_PERIOD            (*(volatile uint32_t *)PWM_PLUS0_PERIOD_ADDR)
+
+#define PWM_PLUS0_CH0_COMP_ADDR     (PWM_PLUS0_BASE_ADDR + PWMPLUS_CH0_COMP)
+#define PWM_PLUS0_CH0_COMP          (*(volatile uint32_t *)PWM_PLUS0_CH0_COMP_ADDR)
+
+#define PWM_PLUS0_CH1_COMP_ADDR     (PWM_PLUS0_BASE_ADDR + PWMPLUS_CH1_COMP)
+#define PWM_PLUS0_CH1_COMP          (*(volatile uint32_t *)PWM_PLUS0_CH1_COMP_ADDR)
+
+#define PWM_PLUS0_CH2_COMP_ADDR     (PWM_PLUS0_BASE_ADDR + PWMPLUS_CH2_COMP)
+#define PWM_PLUS0_CH2_COMP          (*(volatile uint32_t *)PWM_PLUS0_CH2_COMP_ADDR)
+
+#define PWM_PLUS0_CH0_DT_ADDR       (PWM_PLUS0_BASE_ADDR + PWMPLUS_CH0_DT)
+#define PWM_PLUS0_CH0_DT            (*(volatile uint32_t *)PWM_PLUS0_CH0_DT_ADDR)
+
+#define PWM_PLUS0_CH1_DT_ADDR       (PWM_PLUS0_BASE_ADDR + PWMPLUS_CH1_DT)
+#define PWM_PLUS0_CH1_DT            (*(volatile uint32_t *)PWM_PLUS0_CH1_DT_ADDR)
+
+#define PWM_PLUS0_CH2_DT_ADDR       (PWM_PLUS0_BASE_ADDR + PWMPLUS_CH2_DT)
+#define PWM_PLUS0_CH2_DT            (*(volatile uint32_t *)PWM_PLUS0_CH2_DT_ADDR)
+
+#define PWM_PLUS0_TRIG_COMP_ADDR    (PWM_PLUS0_BASE_ADDR + PWMPLUS_TRIG_COMP)
+#define PWM_PLUS0_TRIG_COMP         (*(volatile uint32_t *)PWM_PLUS0_TRIG_COMP_ADDR)
+
+#define PWM_PLUS0_TRIG_CFG_ADDR     (PWM_PLUS0_BASE_ADDR + PWMPLUS_TRIG_CFG)
+#define PWM_PLUS0_TRIG_CFG          (*(volatile uint32_t *)PWM_PLUS0_TRIG_CFG_ADDR)
+
+#define PWM_PLUS0_IE_ADDR           (PWM_PLUS0_BASE_ADDR + PWMPLUS_IE)
+#define PWM_PLUS0_IE                (*(volatile uint32_t *)PWM_PLUS0_IE_ADDR)
+
+#define PWM_PLUS0_IF_ADDR           (PWM_PLUS0_BASE_ADDR + PWMPLUS_IF)
+#define PWM_PLUS0_IF                (*(volatile uint32_t *)PWM_PLUS0_IF_ADDR)
+
+#define PWM_PLUS0_SWLOAD_ADDR       (PWM_PLUS0_BASE_ADDR + PWMPLUS_SWLOAD)
+#define PWM_PLUS0_SWLOAD            (*(volatile uint32_t *)PWM_PLUS0_SWLOAD_ADDR)
+
+#define PWM_PLUS0_MASK_EN_ADDR      (PWM_PLUS0_BASE_ADDR + PWMPLUS_MASK_EN)
+#define PWM_PLUS0_MASK_EN           (*(volatile uint32_t *)PWM_PLUS0_MASK_EN_ADDR)
+
+#define PWM_PLUS0_CNT_ST_ADDR       (PWM_PLUS0_BASE_ADDR + PWMPLUS_CNT_ST)
+#define PWM_PLUS0_CNT_ST            (*(volatile uint32_t *)PWM_PLUS0_CNT_ST_ADDR)
+
+#define PWM_PLUS0_BRAKE_ST_ADDR     (PWM_PLUS0_BASE_ADDR + PWMPLUS_BRAKE_ST)
+#define PWM_PLUS0_BRAKE_ST          (*(volatile uint32_t *)PWM_PLUS0_BRAKE_ST_ADDR)
+
+#endif

driver/backlight.c

@@ -16,21 +16,25 @@
 
 #include "backlight.h"
 #include "bsp/dp32g030/gpio.h"
+#include "bsp/dp32g030/pwmplus.h"
 #include "driver/gpio.h"
 #include "settings.h"
 
 // this is decremented once every 500ms
 uint16_t gBacklightCountdown = 0;
+bool backlightOn;
 
 void BACKLIGHT_TurnOn(void)
 {
-	if (gEeprom.BACKLIGHT == 0)
+	if (gEeprom.BACKLIGHT_TIME == 0)
 		return;
 
-	// turn the backlight ON
+	backlightOn = true;
-	GPIO_SetBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);
 
-	switch (gEeprom.BACKLIGHT)
+	// turn the backlight ON
+	BACKLIGHT_SetBrightness(gEeprom.BACKLIGHT_MAX);
+		
+	switch (gEeprom.BACKLIGHT_TIME)
 	{
 		default:
 		case 1:	// 5 sec
@@ -58,3 +62,21 @@ void BACKLIGHT_TurnOn(void)
 
 	gBacklightCountdown *= 2;
 }
+
+void BACKLIGHT_TurnOff()
+{
+	BACKLIGHT_SetBrightness(gEeprom.BACKLIGHT_MIN);
+	gBacklightCountdown = 0;
+	backlightOn = false;
+}
+
+bool BACKLIGHT_IsOn()
+{
+	return backlightOn;
+}
+
+void BACKLIGHT_SetBrightness(uint8_t brigtness)
+{
+	PWM_PLUS0_CH0_COMP = (1 << brigtness) - 1;
+	//PWM_PLUS0_SWLOAD = 1;
+}

driver/backlight.h

@@ -18,10 +18,15 @@
 #define DRIVER_BACKLIGHT_H
 
 #include <stdint.h>
+#include <stdbool.h>
 
 extern uint16_t gBacklightCountdown;
+extern uint8_t gBacklightBrightness;
 
-void BACKLIGHT_TurnOn(void);
+void BACKLIGHT_TurnOn();
+void BACKLIGHT_TurnOff();
+bool BACKLIGHT_IsOn();
+void BACKLIGHT_SetBrightness(uint8_t brigtness);
 
 #endif
 

main.c

@@ -61,7 +61,8 @@ void Main(void)
 		| SYSCON_DEV_CLK_GATE_SPI0_BITS_ENABLE
 		| SYSCON_DEV_CLK_GATE_SARADC_BITS_ENABLE
 		| SYSCON_DEV_CLK_GATE_CRC_BITS_ENABLE
-		| SYSCON_DEV_CLK_GATE_AES_BITS_ENABLE;
+		| SYSCON_DEV_CLK_GATE_AES_BITS_ENABLE
+		| SYSCON_DEV_CLK_GATE_PWM_PLUS0_BITS_ENABLE;
 
 	SYSTICK_Init();
 	BOARD_Init();
@@ -140,10 +141,10 @@ void Main(void)
 	{
 		FUNCTION_Select(FUNCTION_POWER_SAVE);
 
-		if (gEeprom.BACKLIGHT < (ARRAY_SIZE(gSubMenu_BACKLIGHT) - 1))
+		if (gEeprom.BACKLIGHT_TIME < (ARRAY_SIZE(gSubMenu_BACKLIGHT) - 1)) // backlight is not set to be always on
-			GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);	// turn the backlight OFF
+			BACKLIGHT_TurnOff();	// turn the backlight OFF
 		else
-			GPIO_SetBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);  	// turn the backlight ON
+			BACKLIGHT_TurnOn();  	// turn the backlight ON
 
 		gReducedService = true;
 	}

settings.c

@@ -96,12 +96,12 @@ void SETTINGS_SaveSettings(void)
 	State[7] = gEeprom.MIC_SENSITIVITY;
 	EEPROM_WriteBuffer(0x0E70, State);
 
-	State[0] = 0xFF;
+	State[0] = (gEeprom.BACKLIGHT_MIN << 4) + gEeprom.BACKLIGHT_MAX;
 	State[1] = gEeprom.CHANNEL_DISPLAY_MODE;
 	State[2] = gEeprom.CROSS_BAND_RX_TX;
 	State[3] = gEeprom.BATTERY_SAVE;
 	State[4] = gEeprom.DUAL_WATCH;
-	State[5] = gEeprom.BACKLIGHT;
+	State[5] = gEeprom.BACKLIGHT_TIME;
 	State[6] = gEeprom.TAIL_NOTE_ELIMINATION;
 	State[7] = gEeprom.VFO_OPEN;
 	EEPROM_WriteBuffer(0x0E78, State);
@@ -123,11 +123,11 @@ void SETTINGS_SaveSettings(void)
 	#endif
 	EEPROM_WriteBuffer(0x0E98, Password);
 
-	#ifdef ENABLE_VOICE
+	memset(State, 0xFF, sizeof(State));
-		memset(State, 0xFF, sizeof(State));
+#ifdef ENABLE_VOICE
-		State[0] = gEeprom.VOICE_PROMPT;
+	State[0] = gEeprom.VOICE_PROMPT;
-		EEPROM_WriteBuffer(0x0EA0, State);
+	EEPROM_WriteBuffer(0x0EA0, State);
-	#endif
+#endif
 
 	#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 		State[0] = gEeprom.ALARM_MODE;

settings.h

@@ -160,7 +160,7 @@ typedef struct {
 	uint8_t               DUAL_WATCH;
 	uint8_t               CROSS_BAND_RX_TX;
 	uint8_t               BATTERY_SAVE;
-	uint8_t               BACKLIGHT;
+	uint8_t               BACKLIGHT_TIME;
 	uint8_t               SCAN_RESUME_MODE;
 	uint8_t               SCAN_LIST_DEFAULT;
 	bool                  SCAN_LIST_ENABLED[2];
@@ -228,6 +228,8 @@ typedef struct {
 	uint8_t               field79_0x97;
 
 	uint8_t 			  KEY_M_LONG_PRESS_ACTION;
+	uint8_t               BACKLIGHT_MIN;
+	uint8_t               BACKLIGHT_MAX;
 } EEPROM_Config_t;
 
 extern EEPROM_Config_t gEeprom;

ui/menu.c

@@ -83,6 +83,8 @@ const t_menu_item MenuList[] =
 	{"POnMsg", VOICE_ID_INVALID,                       MENU_PONMSG        },
 	{"BatTxt", VOICE_ID_INVALID,                       MENU_BAT_TXT       },	
 	{"BackLt", VOICE_ID_INVALID,                       MENU_ABR           }, // was "ABR"
+	{"BLMin",  VOICE_ID_INVALID,                       MENU_ABR_MIN       },
+	{"BLMax",  VOICE_ID_INVALID,                       MENU_ABR_MAX       },
 	{"BltTRX", VOICE_ID_INVALID,                       MENU_ABR_ON_TX_RX  },
 	{"Beep",   VOICE_ID_BEEP_PROMPT,                   MENU_BEEP          },
 #ifdef ENABLE_VOICE
@@ -590,6 +592,16 @@ void UI_DisplayMenu(void)
 
 		case MENU_ABR:
 			strcpy(String, gSubMenu_BACKLIGHT[gSubMenuSelection]);
+			BACKLIGHT_SetBrightness(-1);
+			break;
+
+		case MENU_ABR_MIN:
+		case MENU_ABR_MAX:
+			sprintf(String, "%d", gSubMenuSelection);
+			if(gIsInSubMenu)
+				BACKLIGHT_SetBrightness(gSubMenuSelection);
+			else
+				BACKLIGHT_SetBrightness(-1);
 			break;	
 
 		case MENU_AM:

ui/menu.h

@@ -53,6 +53,8 @@ enum
 #endif
 	MENU_ABR,
 	MENU_ABR_ON_TX_RX,
+	MENU_ABR_MIN,
+	MENU_ABR_MAX,
 	MENU_TDR,
 	MENU_BEEP,
 #ifdef ENABLE_VOICE