Minor cleanups. Add the required Cube HAL to app Makefile.

arch.mk

@@ -78,11 +78,6 @@ ifeq ($(ARCH),ARM)
     endif
   endif
 
-  ifeq ($(TARGET),stm32l4)
-    ARCH_FLASH_OFFSET=0x08000000
-    SPI_TARGET=stm32
-  endif
-  
   ## Cortex-M CPU
   ifeq ($(CORTEX_M33),1)
     CFLAGS+=-mcpu=cortex-m33
@@ -274,10 +269,13 @@ endif
 
 ifeq ($(TARGET),stm32l4)
   SPI_TARGET=stm32
+  ARCH_FLASH_OFFSET=0x08000000
   OBJS+=$(STM32CUBE)/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash.o
   OBJS+=$(STM32CUBE)/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ex.o
-  CFLAGS+=-DSTM32L4A6xx -DUSE_HAL_DRIVER -I$(STM32CUBE)/Drivers/STM32L4xx_HAL_Driver/Inc/ \
-  -Isrc -I$(STM32CUBE)/Drivers/BSP/STM32L4xx_Nucleo_144/ -I$(STM32CUBE)/Drivers/CMSIS/Device/ST/STM32L4xx/Include/ \
+  CFLAGS+=-DSTM32L4A6xx -DUSE_HAL_DRIVER -Isrc -Ihal \
+    -I$(STM32CUBE)/Drivers/STM32L4xx_HAL_Driver/Inc/ \
+    -I$(STM32CUBE)/Drivers/BSP/STM32L4xx_Nucleo_144/ \
+    -I$(STM32CUBE)/Drivers/CMSIS/Device/ST/STM32L4xx/Include/ \
     -I$(STM32CUBE)/Drivers/CMSIS/Include/
 endif
 

hal/stm32l4.c

@@ -27,14 +27,9 @@
 #define DMB() asm volatile ("dmb")
 
 /*** RCC ***/
-
 #define RCC_PRESCALER_DIV_NONE 0
 
-
-
 static uint32_t Address = 0, PAGEError = 0;
-
-
 static FLASH_EraseInitTypeDef EraseInitStruct;
 
 
@@ -127,7 +122,7 @@ int RAMFUNCTION hal_flash_erase(uint32_t address,int len)
 
 static void RAMFUNCTION flash_set_waitstates(int waitstates)
 {
-    FLASH->ACR |=  waitstates | FLASH_ACR_DCEN | FLASH_ACR_ICEN;
+    FLASH->ACR |= (waitstates | FLASH_ACR_DCEN | FLASH_ACR_ICEN);
 }
 
 static RAMFUNCTION void flash_wait_complete(void)
@@ -141,7 +136,7 @@ int RAMFUNCTION hal_flash_write(uint32_t address, const uint8_t *data, int len)
     int i = 0;
     uint32_t *dst;
     uint32_t reg;
-    int ret=-1; 
+    int ret = -1;
 
     hal_flash_clear_errors();
     reg = FLASH->CR & (~FLASH_CR_FSTPG);
@@ -178,10 +173,12 @@ int RAMFUNCTION hal_flash_write(uint32_t address, const uint8_t *data, int len)
 static void clock_pll_off(void)
 {
     uint32_t reg32;
+
     /* Enable internal multi-speed oscillator. */
     RCC->CR |= RCC_CR_HSION;
     DMB();
     while ((RCC->CR & RCC_CR_HSIRDY) == 0) {};
+
     /* Select HSI as SYSCLK source. */
     reg32 = RCC->CFGR;
     reg32 &= ~((1 << 1) | (1 << 0));
@@ -201,6 +198,7 @@ static void clockconfig(int powersave)
 
     /* Enable Power controller */
     RCC->APB1ENR1 |= RCC_APB1ENR1_PWREN;
+
     /* Select clock parameters  */
     /*cpu_freq=16000000;*/
     hpre= RCC_PRESCALER_DIV_NONE;
@@ -208,17 +206,19 @@ static void clockconfig(int powersave)
     ppre2=RCC_PRESCALER_DIV_NONE;
     flash_waitstates = 3;
     flash_set_waitstates(flash_waitstates);
+
     /* Enable internal high-speed oscillator. */
     RCC->CR |=RCC_CR_HSION;
     DMB();
     while ((RCC->CR & RCC_CR_HSIRDY)==0);
+
     /* select HSI as SYSCLK source*/
     reg32 = RCC->CFGR;
     reg32 &= ~((1 << 1) | (1 << 0));
     RCC->CFGR = (reg32 | RCC_CFGR_SW_HSI);
     DMB();
-    /* Set prescalers for AHB, ADC, ABP1, ABP2.
-    */
+
+    /* Set prescalers for AHB, ADC, ABP1, ABP2 */
     reg32 = RCC->CFGR;
     reg32 &= ~(0xF0);
     RCC->CFGR = (reg32 | (hpre << 4));

hal/stm32l4xx_hal_conf.h

@@ -1,9 +1,33 @@
+/* stm32-4xx_hal_conf.h
+ *
+ * Copyright (C) 2021 wolfSSL Inc.
+ *
+ * This file is part of wolfBoot.
+ *
+ * wolfBoot is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfBoot is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
+ */
+
 #ifndef __STM32L4xx_HAL_CONF_H
 #define __STM32L4xx_HAL_CONF_H
+
 #define HAL_MODULE_ENABLED  
 #define HAL_FLASH_MODULE_ENABLED
 #define HAL_RCC_MODULE_ENABLED
+
 #include "stm32l4xx_hal_flash.h"
 #include "stm32l4xx_hal_rcc.h"
 #define assert_param(expr) ((void)0U)
+
 #endif /* __STM32L4xx_HAL_CONF_H */

test-app/Makefile

@@ -79,6 +79,16 @@ ifeq ($(TARGET),stm32h7)
   LSCRIPT_TEMPLATE=ARM-stm32h7.ld
 endif
 
+ifeq ($(TARGET),stm32l4)
+  APP_OBJS+=$(STM32CUBE)/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash.o
+  APP_OBJS+=$(STM32CUBE)/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ex.o
+  CFLAGS+=-DSTM32L4A6xx -DUSE_HAL_DRIVER -Isrc -Ihal \
+    -I$(STM32CUBE)/Drivers/STM32L4xx_HAL_Driver/Inc/ \
+    -I$(STM32CUBE)/Drivers/BSP/STM32L4xx_Nucleo_144/ \
+    -I$(STM32CUBE)/Drivers/CMSIS/Device/ST/STM32L4xx/Include/ \
+    -I$(STM32CUBE)/Drivers/CMSIS/Include/
+endif
+
 ifeq ($(TARGET),stm32l5)
   ifeq ($(TZEN),1)
     LSCRIPT_TEMPLATE=ARM-stm32l5-ns.ld

test-app/app_stm32l4.c

@@ -1,3 +1,27 @@
+/* app_stm32l4.c
+ *
+ * Test bare-metal boot-led-on application
+ *
+ * Copyright (C) 2020 wolfSSL Inc.
+ *
+ * This file is part of wolfBoot.
+ *
+ * wolfBoot is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfBoot is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
+ */
+
+
 #include "led.h"
 #include "hal.h"
 #include "wolfboot/wolfboot.h"
@@ -10,17 +34,19 @@ void main(void)
     hal_init();
     boot_led_on();
     boot_version = wolfBoot_current_firmware_version();
-    if(boot_version == 1) {
+    if (boot_version == 1) {
         /* Turn on Blue LED */
         boot_led_on();
         wolfBoot_update_trigger();
-    } else if(boot_version >= 2) {
+    } else if (boot_version >= 2) {
         /* Turn on Red LED */
         led_on();
         wolfBoot_success();
     }
+
     /* Wait for reboot */
     while(1) {
     }
 }
+
 #endif /* PLATFORM_stm32l4 */

test-app/led.c

@@ -180,7 +180,7 @@ void boot_led_off(void)
 #endif /* PLATFORM_stm32wb */
 
 #ifdef PLATFORM_stm32l4
-#define AHB2_CLOCK_ER (*(volatile uint32_t *)(0x4002104C)) // RCC_AHB2ENR
+#define AHB2_CLOCK_ER (*(volatile uint32_t *)(0x4002104C)) /* RCC_AHB2ENR */
 #define GPIOB_AHB2_CLOCK_ER (1 << 1)
 
 #define GPIOB_BASE 0x48000400