Add NULCEO-L476RG variant

Signed-off-by: Frederic.Pillon <frederic.pillon@st.com>

Author: fpistm

boards.txt

@@ -108,6 +108,22 @@ Nucleo_64.menu.Nucleo_64_board.NUCLEO_L053R8.build.cmsis_lib_gcc=arm_cortexM0l_m
 #To enable HID (keyboard and mouse support) add also '-DUSBD_USE_HID_COMPOSITE'
 Nucleo_64.menu.Nucleo_64_board.NUCLEO_L053R8.build.extra_flags=-DSTM32L053xx -D__CORTEX_SC=0 {build.usb_flags}
 
+# NUCLEO_L476RG board
+
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG=Nucleo L476RG
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG.node=NODE_L476RG
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG.upload.maximum_size=1048576
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG.upload.maximum_data_size=131072
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG.build.mcu=cortex-m4
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG.build.f_cpu=4000000L
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG.build.usb_product="NUCLEO-L476RG"
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG.build.board=NUCLEO_L476RG
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG.build.series=STM32L4xx
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG.build.variant=NUCLEO_L476RG
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG.build.cmsis_lib_gcc=arm_cortexM4l_math
+#To enable USB add '-DUSBCON'
+#To enable HID (keyboard and mouse support) add also '-DUSBD_USE_HID_COMPOSITE'
+Nucleo_64.menu.Nucleo_64_board.NUCLEO_L476RG.build.extra_flags=-DSTM32L476xx {build.usb_flags}
 
 Nucleo_64.menu.upload_method.MassStorageMethod=Mass Storage
 Nucleo_64.menu.upload_method.MassStorageMethod.upload.protocol=

cores/arduino/stm32/analog.c

@@ -421,13 +421,25 @@ void HAL_ADC_MspInit(ADC_HandleTypeDef *hadc)
   }
 #endif
 
+#ifdef __HAL_RCC_ADC_CLK_ENABLE
+  __HAL_RCC_ADC_CLK_ENABLE();
+#endif
+#ifdef __HAL_RCC_ADC_CONFIG
+  /* ADC Periph interface clock configuration */
+  __HAL_RCC_ADC_CONFIG(RCC_ADCCLKSOURCE_SYSCLK);
+#endif
+
   /* Enable GPIO clock ****************************************/
   port = set_GPIO_Port_Clock(STM_PORT(g_current_pin));
 
   /*##-2- Configure peripheral GPIO ##########################################*/
   /* ADC Channel GPIO pin configuration */
   GPIO_InitStruct.Pin = STM_GPIO_PIN(g_current_pin);
+#ifdef GPIO_MODE_ANALOG_ADC_CONTROL
+  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG_ADC_CONTROL;
+#else
   GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
+#endif
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   HAL_GPIO_Init(port, &GPIO_InitStruct);
 }
@@ -573,7 +585,11 @@ uint16_t adc_read_value(PinName pin)
   }
 
   AdcChannelConf.Channel      = get_adc_channel(pin);             /* Specifies the channel to configure into ADC */
+#ifdef STM32L4xx
+  if (!IS_ADC_CHANNEL(&AdcHandle, AdcChannelConf.Channel)) return 0;
+#else
   if (!IS_ADC_CHANNEL(AdcChannelConf.Channel)) return 0;
+#endif
   AdcChannelConf.Rank         = ADC_REGULAR_RANK_1;               /* Specifies the rank in the regular group sequencer */
 #ifndef STM32L0xx
   AdcChannelConf.SamplingTime = SAMPLINGTIME;                     /* Sampling time value to be set for the selected channel */
@@ -585,7 +601,7 @@ uint16_t adc_read_value(PinName pin)
     return 0;
   }
 
-#ifdef STM32F3xx
+#if defined (STM32F3xx) || defined (STM32L4xx)
   /*##-2.1- Calibrate ADC then Start the conversion process ####################*/
   if (HAL_ADCEx_Calibration_Start(&AdcHandle, ADC_SINGLE_ENDED) !=  HAL_OK)
   {

cores/arduino/stm32/stm32_def_build.h

@@ -32,6 +32,8 @@
 #define CMSIS_STARTUP_FILE "startup_stm32f429xx.s"
 #elif defined(STM32L053xx)
 #define CMSIS_STARTUP_FILE "startup_stm32l053xx.s"
+#elif defined(STM32L476xx)
+#define CMSIS_STARTUP_FILE "startup_stm32l476xx.s"
 #else
 #error UNKNOWN CHIP
 #endif

cores/arduino/stm32/stm32_eeprom.c

@@ -80,6 +80,10 @@
 #define FLASH_DATA_SECTOR   15
 #elif defined (STM32L0xx)
 #define FLASH_BASE_ADDRESS  ((uint32_t)(DATA_EEPROM_BASE)) /* 0x08080000 */
+#elif defined (STM32L4xx)
+// Flash base address (Bank2, page 256)
+#define FLASH_BASE_ADDRESS  0x080FF800
+#define FLASH_PAGE_NUMBER   255
 #endif
 
 /**
@@ -162,20 +166,27 @@ void set_data_to_flash(void)
   uint32_t offset = 0;
   uint32_t address = FLASH_BASE_ADDRESS;
   uint32_t address_end = FLASH_BASE_ADDRESS + E2END;
-#if defined (STM32F0xx) || defined (STM32F3xx) || defined (STM32L0xx)
+#if defined (STM32F0xx) || defined (STM32F3xx) || defined (STM32L0xx) || defined(STM32L4xx)
   uint32_t pageError = 0;
   uint64_t data = 0;
 
   // ERASING page
   EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;
+#ifdef STM32L4xx
+  EraseInitStruct.Banks = FLASH_BANK_2;
+  EraseInitStruct.Page = FLASH_PAGE_NUMBER;
+#else
   EraseInitStruct.PageAddress = FLASH_BASE_ADDRESS;
   EraseInitStruct.NbPages = 1;
+#endif
 
   if(HAL_FLASH_Unlock() == HAL_OK) {
 #ifdef STM32L0xx
     __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP|FLASH_FLAG_WRPERR|FLASH_FLAG_PGAERR|\
                            FLASH_FLAG_SIZERR|FLASH_FLAG_OPTVERR|FLASH_FLAG_RDERR|\
                            FLASH_FLAG_FWWERR|FLASH_FLAG_NOTZEROERR);
+#elif defined (STM32L4xx)
+    __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_ALL_ERRORS);
 #else
     __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP|FLASH_FLAG_WRPERR|FLASH_FLAG_PGERR);
 #endif

cores/arduino/stm32/twi.c

@@ -225,7 +225,7 @@ void i2c_custom_init(i2c_t *obj, i2c_timing_e timing, uint32_t addressingMode, u
   HAL_GPIO_Init(port, &GPIO_InitStruct);
 
   handle->Instance             = obj->i2c;
-#if defined (STM32F0xx) || defined (STM32F3xx) || defined (STM32L0xx)
+#if defined (STM32F0xx) || defined (STM32F3xx) || defined (STM32L0xx) || defined (STM32L4xx)
   handle->Init.Timing      = timing;
 #else
   handle->Init.ClockSpeed      = timing;
@@ -280,7 +280,7 @@ void i2c_setTiming(i2c_t *obj, uint32_t frequency)
   else if(frequency <= 400000)
     f = I2C_400KHz;
 
-#if defined (STM32F0xx) || defined (STM32F3xx) || defined (STM32L0xx)
+#if defined (STM32F0xx) || defined (STM32F3xx) || defined (STM32L0xx) || defined (STM32L4xx)
   obj->handle.Init.Timing = f;
 #else
   obj->handle.Init.ClockSpeed = f;

cores/arduino/stm32/twi.h

@@ -83,7 +83,7 @@ typedef enum {
 }i2c_status_e;
 
 typedef enum {
-#if defined (STM32F0xx) || defined (STM32F3xx)
+#if defined (STM32F0xx) || defined (STM32F3xx) || defined (STM32L0xx)
 //calculated with SYSCLK = 64MHz at
 /*https://www.google.fr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwiC4q6O7ojMAhWCOhoKHYlyBtIQFggmMAE&url=http%3A%2F%2Fuglyduck.ath.cx%2FPDF%2FSTMicro%2FARM%2FSTM32F0%2FI2C_Timing_Configuration_V1.0.1.xls&usg=AFQjCNGGjPSUAzVUdbUqMUxPub8Ojzhh9w&sig2=4YgzXFixj15GhqkAzVS4tA*/
   I2C_10KHz =   0xE010A9FF,
@@ -94,7 +94,16 @@ typedef enum {
   I2C_600KHz =  0x00900E50,
   I2C_800KHz =  0x00900E35,
   I2C_1000KHz = 0x00900E25
-#else
+#elif defined (STM32L4xx)
+  I2C_10KHz =   0xF010F3FE,
+  I2C_50KHz =   0x30608CFF,
+  I2C_100KHz =  0x10D0A4E4,
+  I2C_200KHz =  0x00F082FF,
+  I2C_400KHz =  0x00F02E8B,
+  I2C_600KHz =  0x00B01265,
+  I2C_800KHz =  0x00B01243,
+  I2C_1000KHz = 0x00B0122F
+#else //STM32F4xx
   I2C_10KHz =   10000,
   I2C_50KHz =   50000,
   I2C_100KHz =  100000,