lib: Add cmsis libraries for stm32g0

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

lib/README

@@ -58,6 +58,11 @@ The stm32f4 directory contains code from:
 version v1.24.1 (b5abca20c9676b04f8d2885a668a9b653ee65705). Contents
 taken from the Drivers/CMSIS/Device/ST/STM32F4xx/ directory.
 
+The stm32g0 directory contains code from:
+  https://github.com/STMicroelectronics/STM32CubeG0
+version v1.4.1 (5cb06333a6a43cefbe145f10a5aa98d3cc4cffee). Contents
+taken from the Drivers/CMSIS/Device/ST/STM32G0xx/ directory.
+
 The stm32h7 directory contains code from:
   https://github.com/STMicroelectronics/STM32CubeH7
 version v1.7.0 (79196b09acfb720589f58e93ccf956401b18a191). Contents

lib/stm32g0/include/stm32g0xx.h

@@ -0,0 +1,211 @@
+/**
+  ******************************************************************************
+  * @file    stm32g0xx.h
+  * @author  MCD Application Team
+  * @brief   CMSIS STM32G0xx Device Peripheral Access Layer Header File.
+  *
+  *          The file is the unique include file that the application programmer
+  *          is using in the C source code, usually in main.c. This file contains:
+  *           - Configuration section that allows to select:
+  *              - The STM32G0xx device used in the target application
+  *              - To use or not the peripherals drivers in application code(i.e.
+  *                code will be based on direct access to peripherals registers
+  *                rather than drivers API), this option is controlled by
+  *                "#define USE_HAL_DRIVER"
+  *
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2018 STMicroelectronics. 
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under Apache License, Version 2.0,
+  * the "License"; You may not use this file except in compliance with the
+  * License. You may obtain a copy of the License at:
+  *                        opensource.org/licenses/Apache-2.0
+  *
+  ******************************************************************************
+  */
+
+/** @addtogroup CMSIS
+  * @{
+  */
+
+/** @addtogroup stm32g0xx
+  * @{
+  */
+
+#ifndef STM32G0xx_H
+#define STM32G0xx_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif /* __cplusplus */
+
+/** @addtogroup Library_configuration_section
+  * @{
+  */
+
+/**
+  * @brief STM32 Family
+  */
+#if !defined (STM32G0)
+#define STM32G0
+#endif /* STM32G0 */
+
+/* Uncomment the line below according to the target STM32G0 device used in your
+   application
+  */
+
+#if !defined (STM32G071xx) && !defined (STM32G081xx) && !defined (STM32G070xx) \
+ && !defined (STM32G030xx) && !defined (STM32G031xx) && !defined (STM32G041xx) \
+ && !defined (STM32G0B0xx) && !defined (STM32G0B1xx) && !defined (STM32G0C1xx) \
+ && !defined (STM32G050xx) && !defined (STM32G051xx) && !defined (STM32G061xx)
+  /* #define STM32G0B0xx */   /*!< STM32G0B0xx Devices */
+  /* #define STM32G0B1xx */   /*!< STM32G0B1xx Devices */
+  /* #define STM32G0C1xx */   /*!< STM32G0C1xx Devices */
+  /* #define STM32G070xx */   /*!< STM32G070xx Devices */
+  /* #define STM32G071xx */   /*!< STM32G071xx Devices */
+  /* #define STM32G081xx */   /*!< STM32G081xx Devices */
+  /* #define STM32G050xx */   /*!< STM32G050xx Devices */
+  /* #define STM32G051xx */   /*!< STM32G051xx Devices */
+  /* #define STM32G061xx */   /*!< STM32G061xx Devices */
+  /* #define STM32G030xx */   /*!< STM32G030xx Devices */
+  /* #define STM32G031xx */   /*!< STM32G031xx Devices */
+  /* #define STM32G041xx */   /*!< STM32G041xx Devices */
+#endif
+
+/*  Tip: To avoid modifying this file each time you need to switch between these
+        devices, you can define the device in your toolchain compiler preprocessor.
+  */
+#if !defined  (USE_HAL_DRIVER)
+/**
+ * @brief Comment the line below if you will not use the peripherals drivers.
+   In this case, these drivers will not be included and the application code will
+   be based on direct access to peripherals registers
+   */
+  /*#define USE_HAL_DRIVER */
+#endif /* USE_HAL_DRIVER */
+
+/**
+  * @brief CMSIS Device version number $VERSION$
+  */
+#define __STM32G0_CMSIS_VERSION_MAIN   (0x01U) /*!< [31:24] main version */
+#define __STM32G0_CMSIS_VERSION_SUB1   (0x04U) /*!< [23:16] sub1 version */
+#define __STM32G0_CMSIS_VERSION_SUB2   (0x00U) /*!< [15:8]  sub2 version */
+#define __STM32G0_CMSIS_VERSION_RC     (0x00U) /*!< [7:0]  release candidate */
+#define __STM32G0_CMSIS_VERSION        ((__STM32G0_CMSIS_VERSION_MAIN << 24)\
+                                       |(__STM32G0_CMSIS_VERSION_SUB1 << 16)\
+                                       |(__STM32G0_CMSIS_VERSION_SUB2 << 8 )\
+                                       |(__STM32G0_CMSIS_VERSION_RC))
+
+/**
+  * @}
+  */
+
+/** @addtogroup Device_Included
+  * @{
+  */
+
+#if defined(STM32G0B1xx)
+  #include "stm32g0b1xx.h"
+#elif defined(STM32G0C1xx)
+  #include "stm32g0c1xx.h"
+#elif defined(STM32G0B0xx)
+  #include "stm32g0b0xx.h"
+#elif defined(STM32G071xx)
+  #include "stm32g071xx.h"
+#elif defined(STM32G081xx)
+  #include "stm32g081xx.h"
+#elif defined(STM32G070xx)
+  #include "stm32g070xx.h"
+#elif defined(STM32G031xx)
+  #include "stm32g031xx.h"
+#elif defined(STM32G041xx)
+  #include "stm32g041xx.h"
+#elif defined(STM32G030xx)
+  #include "stm32g030xx.h"
+#elif defined(STM32G051xx)
+  #include "stm32g051xx.h"
+#elif defined(STM32G061xx)
+  #include "stm32g061xx.h"
+#elif defined(STM32G050xx)
+  #include "stm32g050xx.h"
+#else
+ #error "Please select first the target STM32G0xx device used in your application (in stm32g0xx.h file)"
+#endif
+
+/**
+  * @}
+  */
+
+/** @addtogroup Exported_types
+  * @{
+  */
+typedef enum
+{
+  RESET = 0,
+  SET = !RESET
+} FlagStatus, ITStatus;
+
+typedef enum
+{
+  DISABLE = 0,
+  ENABLE = !DISABLE
+} FunctionalState;
+#define IS_FUNCTIONAL_STATE(STATE) (((STATE) == DISABLE) || ((STATE) == ENABLE))
+
+typedef enum
+{
+  SUCCESS = 0,
+  ERROR = !SUCCESS
+} ErrorStatus;
+
+/**
+  * @}
+  */
+
+
+/** @addtogroup Exported_macros
+  * @{
+  */
+#define SET_BIT(REG, BIT)     ((REG) |= (BIT))
+
+#define CLEAR_BIT(REG, BIT)   ((REG) &= ~(BIT))
+
+#define READ_BIT(REG, BIT)    ((REG) & (BIT))
+
+#define CLEAR_REG(REG)        ((REG) = (0x0))
+
+#define WRITE_REG(REG, VAL)   ((REG) = (VAL))
+
+#define READ_REG(REG)         ((REG))
+
+#define MODIFY_REG(REG, CLEARMASK, SETMASK)  WRITE_REG((REG), (((READ_REG(REG)) & (~(CLEARMASK))) | (SETMASK)))
+
+/*#define POSITION_VAL(VAL)     (__CLZ(__RBIT(VAL)))*/
+/**
+  * @}
+  */
+
+#if defined (USE_HAL_DRIVER)
+ #include "stm32g0xx_hal.h"
+#endif /* USE_HAL_DRIVER */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* STM32G0xx_H */
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

lib/stm32g0/include/system_stm32g0xx.h

@@ -0,0 +1,106 @@
+/**
+  ******************************************************************************
+  * @file    system_stm32g0xx.h
+  * @author  MCD Application Team
+  * @brief   CMSIS Cortex-M0+ Device System Source File for STM32G0xx devices.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2018 STMicroelectronics. 
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under Apache License, Version 2.0,
+  * the "License"; You may not use this file except in compliance with the
+  * License. You may obtain a copy of the License at:
+  *                        opensource.org/licenses/Apache-2.0
+  *
+  ******************************************************************************
+  */
+
+/** @addtogroup CMSIS
+  * @{
+  */
+
+/** @addtogroup stm32g0xx_system
+  * @{
+  */
+
+/**
+  * @brief Define to prevent recursive inclusion
+  */
+#ifndef SYSTEM_STM32G0XX_H
+#define SYSTEM_STM32G0XX_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/** @addtogroup STM32G0xx_System_Includes
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+
+/** @addtogroup STM32G0xx_System_Exported_types
+  * @{
+  */
+  /* This variable is updated in three ways:
+      1) by calling CMSIS function SystemCoreClockUpdate()
+      2) by calling HAL API function HAL_RCC_GetSysClockFreq()
+      3) each time HAL_RCC_ClockConfig()  is called to configure the system clock frequency
+         Note: If you use this function to configure the system clock; then there
+               is no need to call the 2 first functions listed above, since SystemCoreClock
+               variable is updated automatically.
+  */
+extern uint32_t SystemCoreClock;         /*!< System Clock Frequency (Core Clock) */
+
+extern const uint32_t AHBPrescTable[16];  /*!<  AHB prescalers table values */
+extern const uint32_t APBPrescTable[8];   /*!< APB prescalers table values */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32G0xx_System_Exported_Constants
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32G0xx_System_Exported_Macros
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32G0xx_System_Exported_Functions
+  * @{
+  */
+
+extern void SystemInit(void);
+extern void SystemCoreClockUpdate(void);
+/**
+  * @}
+  */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*SYSTEM_STM32G0XX_H */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/