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# Release Notes for STM32L0xx CMSIS

Copyright 2016 STMicroelectronics

## License

This software component is licensed by ST under BSD 3-Clause license, the "License"; You may not use this component except in compliance with the License. You may obtain a copy of the License at:

https://opensource.org/licenses/BSD-3-Clause

### V1.9.0 / 26-October-2018

#### Main changes

- Add the support of STM32L010xx devices

- Add stm32l010xb.h, stm32l010x8.h, stm32l010x6.h and stm32l010x4.h device description files

- Add startup_stm32l010xb.s, startup_stm32l010x8.s, startup_stm32l010x6.s and startup_stm32l010x4.s startup files for EWARM, MDK-ARM and SW4STM32 toolchains

- Add EWARM associated linker files for execution from internal RAM or internal FLASH

- stm32l0xx.h

- Add the following device defines:

- "#define STM32L010xB" for all STM32L010xB devices
- "#define STM32L010x8" for all STM32L010x8 devices
- "#define STM32L010x6" for all STM32L010x6 devices
- "#define STM32L010x4" for all STM32L010x4 devices

- Align ErrorStatus typedef to common error handling.

- All stm32l0xxxx.h device description files.h

- [MISRAC2012-Rule-10.6] Use 'UL' postfix for _Msk definitions and memory/peripheral base addresses
- Correct comments in the bit definition of RCC_AHBRST, RCC_APB2RSTR and RCC_APB1RSTR registers.
- Rename RTC_CR_BCK bit to RTC_CR_BKP to be aligned with reference manual.
- Add missing definition of IS_TSC_ALL_INSTANCE after TSC driver update.
- Add back the bit definition of SYSCFG_CFGR3_EN_VREFINT in SYSCFG_CFGR3 register.
- Rename GPIO_AFRL_AFRLx and GPIO_AFRL_AFRHx bit definitions (from GPIO_AFRL/AFRH registers) to GPIO_AFRL_AFSELx.
- Align IS_TIM_XXX_INSTANCE definitions with other series.
- Remove cast (uint8_t) in CRC_IDR_IDR definition.
- Add missing definition of IS_PCD_ALL_INSTANCE macro after USB driver update.
- Add definition of IS_UART_DRIVER_ENABLE_INSTANCE macro after UART driver update.
- Add compatibility definition of USART_ICR_NECF / USART_ICR_NCF with others series.
- Update IS_UART_INSTANCE macro definition.
- Add definition of I S_LPTIM_ENCODER_INTERFACE_INSTANCE macro after LPTIM driver update.
- Move definition of FLASH_BANK2_BASE start address to stm32l0xx_hal_flash.h to be dependant on Memory Size register.
- Update interrupt definition to use DMA1_Channel4_5_IRQn for STM32L011xx and STM32L021xx devices.
- Correct PWR_WAKEUP_PIN definitions for L011xx and L021xx devices.

- system_stm32l0xx.c

- Update file to correct comments for VECT_TAB_OFFSET definition.
- Update default MSI_VALUE reset value set in SystemCoreClock.
- Update SystemCoreClockUpdate() function to check HSI16DIVF for HSI divided by 4.

- startup_stm32l0xxxx.s

- Update startup files to use DMA1_Channel4_5_IRQn/IRQHandler for STM32L011xx and STM32L01xx devices.

## Update History

### V1.8.0 / 12-January-2018

- Internal Release.

### V1.7.2 / 25-August-2017

Main Changes

- Removed DATE and VERSION fields from header files.

### V1.7.1 / 25-November-2016

Main Changes

- Updated IS_COMP_COMMON_INSTANCE() macro.
- Corrected ADC_CFGR2_TOVS bit and mask definitions.

### V1.7.0 / 31-May-2016

Main Changes

- Added Pos and Msk macros missing within the CMSIS stm32l083xx.h file.
- Added LCD_CR_BUFEN bit definition in LCD CR register for stm32l053xx, stm32l063xx, stm32l073xx, stm32l083xx devices.

### V1.6.0 / 15-April-2016

Main Changes

- Add Pos and Msk macros within the CMSIS files.

- For example, on the previous CMSIS version (V1.5.0), the constant ADC_IER_EOCALIE was defined as follow :
  #define ADC_IER_EOCALIE ((uint32_t)0x00000800U)
- On this new CMSIS version (V1.6.0), the constant ADC_IER_EOCALIE is now defined as follow :
  #define ADC_IER_EOCALIE_Pos (11U)
  #define ADC_IER_EOCALIE_Msk (0x1U << ADC_IER_EOCALIE_Pos)
  #define ADC_IER_EOCALIE ADC_IER_EOCALIE_Msk
- The same rule applies on all the other constants present inside the CMSIS files.

- MISRA C 2004 rule 10.6 compliancy. (A 'U' suffix shall be applied to all constants of unisgned type).
- Several SYSCFG definition changes :
  - SYSCFG_CFGR3_EN_VREFINT enable bit suppressed. (no more needed and must not be used).
  - SYSCFG_CFGR3_EN_BGAP define suppressed.
  - SYSCFG_CFGR3_REF_HSI48_RDYF, SYSCFG_CFGR3_SENSOR_ADC_RDYF, SYSCFG_CFGR3_VREFINT_ADC_RDYF, SYSCFG_CFGR3_VREFINT_COMP_RDYF flags suppressed, SYSCFG_CFGR3_VREFINT_RDYF must be used instead (this flag is a combination of the 4 suppressed flags).
  - Added SYSCFG_CFGR3_REF_RC48MHz_RDYF, SYSCFG_CFGR3_REF_HSI48_RDYF, SYSCFG_VREFINT_ADC_RDYF, SYSCFG_CFGR3_SENSOR_ADC_RDYF, SYSCFG_CFGR3_VREFINT_ADC_RDYF and SYSCFG_CFGR3_VREFINT_COMP_RDYF defines.
- Aligned register namings with the different L0 Reference Manual (For STM32L0x1 : RM0377 Rev5, for STM32L0x2 : RM0367 Rev2, for STM32L0x3 : RM0367 Rev4).
  The list of the modification is listed hereafter :

- Introduced new masks in EXTI bit definitions in order to simplify LL source code.
- Renamed RCC_CFGR_MCO_x into RCC_CFGR_MCOSEL_x
- Added FLASHSIZE_BASE, UID_BASE and SRAM_SIZE_MAX defines.
- Renamed macro IS_DMA_ALL_INSTANCE() to IS_DMA_STREAM_ALL_INSTANCE().
- Added new macros: IS_I2C_WAKEUP_FROMSTOP_INSTANCE(), IS_ADC_COMMON_INSTANCE() and IS_LPUART_INSTANCE().
- Added new defines PWR_PVD_SUPPORT to handle the PVD feature.
- Corrected the value of FLASH_END for STM32L011xx or STM32L021xx devices.

### V1.5.0 / 8-January-2016

Main Changes

- MISRA C 2004 rule 5.1 and rule 10.6 compliancy.
- Several renaming in order to be aligned with the Reference Manual.The list of the modification is listed hereafter :

- Adding of a new COMP_Common_TypeDef structure.
- Removal of the RCR field inside the TIM_TypeDef structure.
- Adding of a new define COMP12_COMMON
- Adding of a new define DAC1 (same as DAC)
- Adding of a new define ADC1_COMMON
- Adding of a new define ADC_CHSELR_CHSEL
- Adding of a new define COMP_CSR_WINMODE
- Adding of a new define DAC_CHANNEL2_SUPPORT
- Renaming of EXTI_RTSR_TRx into EXTI_RTSR_RTx with x = {0,..22}
- Renaming of EXTI_FTSR_TRx into EXTI_FTSR_FTx with x = {0,..22}
- Renaming of EXTI_SWIER_SWIERx into EXTI_SWIER_SWIx with x = {0,..22}
- Renaming of EXTI_PR_PRx into EXTI_PR_PIFx with x = {0,..22}
- Renaming of RCC_IOPRSTR_GPIOxRST into RCC_IOPRSTR_IOPxRST with x = {A,B,C,D,E,H}
- Add a new define RCC_AHBRSTR_DMA1RST
- Add a new define RCC_APB2RSTR_ADC1RST
- Add a new define RCC_APB2RSTR_DBGMCURST
- Renaming of RCC_IOPENR_GPIOxEN into RCC_IOPENR_IOPxEN with x = {A,B,C,D,E,H}
- Add a new define RCC_AHBENR_DMA1EN
- Rename RCC_APB2ENR_MIFIEN into RCC_APB2ENR_FWEN
- Rename RCC_APB2ENR_ADC1EN into RCC_APB2ENR_ADCEN
- Rename RCC_APB2ENR_DBGMCUEN into RCC_APB2ENR_DBGEN
- Rename RCC_IOPSMENR_GPIOxSMEN into RCC_IOPSMENR_IOPxSMEN with x = {A,B,C,D,E,H}
- Add a new define RCC_AHBSMENR_DMA1SMEN
- Rename RCC_APB2SMENR_ADC1SMEN into RCC_APB2SMENR_ADCSMEN
- Rename RCC_APB2SMENR_DBGMCUSMEN into RCC_APB2SMENR_DBGSMEN
- Add new defines TIM_TIM2_REMAP_HSI_SUPPORT and TIM_TIM2_REMAP_HSI48_SUPPORT
- Remove the following defines : TIM_CR2_CCPC, TIM_CR2_CCUS, TIM_CR2_OIS1, TIM_CR2_OIS1N, TIM_CR2_OIS2,TIM_CR2_OIS2N, TIM_CR2_OIS3, TIM_CR2_OIS3N, TIM_CR2_OIS4
- Remove TIM_SR_COMIF and TIM_SR_BIF
- Remove TIM_EGR_COMG and TIM_EGR_BG
- Remove TIM_CCER_CC1NE, TIM_CCER_CC2NE and TIM_CCER_CC3NE
- Remove TIM_RCR_REP
- Rename USART_ISR_LBD into USART_ISR_LBDF
- Rename WWDG_CR_Tx into WWDG_CR_T_x with x = {0,..6}
- Rename WWDG_CFR_WDGTBx into WWDG_CFR_WDGTB_x with x = {0,1}
- Add several macros to check Timer instances (For exemple IS_TIM_CLOCKSOURCE_ETRMODE1_INSTANCE(),IS_TIM_CLOCK_DIVISION_INSTANCE(), etc..)

### V1.4.0 / 16-October-2015

Main Changes

- Update all the files to support STM32L011xx and STM32L021xx.
- Remove the Debug Monitor handler from the startup files (not supported on L0).
- Renamings and usage of some aliases in order to be compliant with the RefManuals.

### V1.3.0 / 9-Sept-2015

Main Changes

- Update all the files to support STM32L031xx and STM32L041xx.
- Several renamings in order to be compliant with the specifications.
- Adding of new bit definitions (COMP_CSR_COMP2LPTIM1IN1, SYSCFG_CFGR1_UFB, I2C_OAR2_x, LCD_CR_MUX_SEG, RTC_BKP_NUMBER)
- Update of several registers and structures (CRC_TypeDef, TIM_TypeDef)

### V1.2.0 / 6-February-2015

Main Changes

- Added the set of CMSIS files for the STM32L07xx and STM32L08xx family and the set of startup files for IAR/Keil/Atollic IDEs
- Add IAR set of files STM32L073xx - STM32L072xx - STM32L071xx - STM32L083xx - STM32L082xx - STM32L081xx

- Added MDK-ARM startup files for L071xx, L072xx, L073xx, L081xx, L082xx, L083xx
- Added Atollic startup files for L071xx, L072xx, L073xx, L081xx, L082xx, L083xx

### V1.1.0 / 18-June-2014

Main Changes

- Header files

- Add defines for memories base and end addresses: FLASH_END, DATA_EEPROM_BASE and DATA_EEPROM_END (instead of having them in stm32l0xx_hal_flash.h file)

- Peripheral register structures definition is aligned on 32 bit

- FLASH_SR_FWWER value fixed to 0x00020000 instead of 0x00010000

- Add missing EXTI register bits definition

- IMR and EMR registers: bits 18, 20, 26, 28, 29
- FTSR, RTSR, PR and SWIER registers: bits 20, 21, 22

- Update some bits definition to be in line with latest version of the Reference Manual

- Rename FLASH_SR_ENHV into FLASH_SR_ENDHV

- Rename SYSCFG_VREFINT_ADC_RDYF into SYSCFG_CFGR3_VREFINT_ADC_RDYF

- Rename ADC_SMPR_SMPR_xxx into ADC_SMPR_SMP_xxx

- Rename SYSCFG_CFGR3_VREFINT_ADC_RDYF into SYSCFG_VREFINT_ADC_RDYF
- Note: aliases has been added to keep compatibility with previous version

- system_stm32l0xx.c

- Use “__IO const” instead of “__I”, to avoid any compilation issue when __cplusplus switch is defined

### V1.0.1 / 24-April-2014

Main Changes

- Update gcc startup files.

### V1.0.0 / 22-April-2014

Main Changes

- First official release.

For complete documentation on STM32 Microcontrollers, visit: www.st.com/STM32