Bootstrap and definition library for programming STM32L100RC in ARM assembler. This was a class project to learn ARM assembly
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stm32l100-asm-bootstrap/lib/INI_DBGMCU.s

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;********************************************************************************
; FILE : INI_DBGMCU.S
; AUTHOR : Petr Dousa, Ondrej Hruska
; DATE : 10/2015
; DESCR : Control registers and bit masks for DBGMCU (Debug MCU control)
;
; Debug MCU (DBGMCU)
;
; Part of an assembler library for STM32L100, based on the STM32 CMSIS.
; Developed for educational purposes at the Department of Measure of CTU in Prague.
; See the LICENSE file for detailed terms of use.
;********************************************************************************
;****************************************************************************
;*
;* REGISTERS
;*
;****************************************************************************
; DBGMCU
DBGMCU_IDCODE EQU (_DBGMCU + 0x00) ; MCU device ID code,
DBGMCU_CR EQU (_DBGMCU + 0x04) ; Debug MCU configuration register,
DBGMCU_APB1FZ EQU (_DBGMCU + 0x08) ; Debug MCU APB1 freeze register,
DBGMCU_APB2FZ EQU (_DBGMCU + 0x0C) ; Debug MCU APB2 freeze register,
;****************************************************************************
;*
;* BIT MASKS AND DEFINITIONS
;*
;****************************************************************************
;*************** Bit definition for DBGMCU_IDCODE register ****************
DBGMCU_IDCODE_DEV_ID EQU 0x00000FFF ; Device Identifier
DBGMCU_IDCODE_REV_ID EQU 0xFFFF0000 ; REV_ID[15:0] bits (Revision Identifier)
DBGMCU_IDCODE_REV_ID_0 EQU 0x00010000 ; Bit 0
DBGMCU_IDCODE_REV_ID_1 EQU 0x00020000 ; Bit 1
DBGMCU_IDCODE_REV_ID_2 EQU 0x00040000 ; Bit 2
DBGMCU_IDCODE_REV_ID_3 EQU 0x00080000 ; Bit 3
DBGMCU_IDCODE_REV_ID_4 EQU 0x00100000 ; Bit 4
DBGMCU_IDCODE_REV_ID_5 EQU 0x00200000 ; Bit 5
DBGMCU_IDCODE_REV_ID_6 EQU 0x00400000 ; Bit 6
DBGMCU_IDCODE_REV_ID_7 EQU 0x00800000 ; Bit 7
DBGMCU_IDCODE_REV_ID_8 EQU 0x01000000 ; Bit 8
DBGMCU_IDCODE_REV_ID_9 EQU 0x02000000 ; Bit 9
DBGMCU_IDCODE_REV_ID_10 EQU 0x04000000 ; Bit 10
DBGMCU_IDCODE_REV_ID_11 EQU 0x08000000 ; Bit 11
DBGMCU_IDCODE_REV_ID_12 EQU 0x10000000 ; Bit 12
DBGMCU_IDCODE_REV_ID_13 EQU 0x20000000 ; Bit 13
DBGMCU_IDCODE_REV_ID_14 EQU 0x40000000 ; Bit 14
DBGMCU_IDCODE_REV_ID_15 EQU 0x80000000 ; Bit 15
;***************** Bit definition for DBGMCU_CR register ******************
DBGMCU_CR_DBG_SLEEP EQU 0x00000001 ; Debug Sleep Mode
DBGMCU_CR_DBG_STOP EQU 0x00000002 ; Debug Stop Mode
DBGMCU_CR_DBG_STANDBY EQU 0x00000004 ; Debug Standby mode
DBGMCU_CR_TRACE_IOEN EQU 0x00000020 ; Trace Pin Assignment Control
DBGMCU_CR_TRACE_MODE EQU 0x000000C0 ; TRACE_MODE[1:0] bits (Trace Pin Assignment Control)
DBGMCU_CR_TRACE_MODE_0 EQU 0x00000040 ; Bit 0
DBGMCU_CR_TRACE_MODE_1 EQU 0x00000080 ; Bit 1
;***************** Bit definition for DBGMCU_APB1_FZ register *************
DBGMCU_APB1_FZ_DBG_TIM2_STOP EQU 0x00000001 ; TIM2 counter stopped when core is halted
DBGMCU_APB1_FZ_DBG_TIM3_STOP EQU 0x00000002 ; TIM3 counter stopped when core is halted
DBGMCU_APB1_FZ_DBG_TIM4_STOP EQU 0x00000004 ; TIM4 counter stopped when core is halted
DBGMCU_APB1_FZ_DBG_TIM5_STOP EQU 0x00000008 ; TIM5 counter stopped when core is halted
DBGMCU_APB1_FZ_DBG_TIM6_STOP EQU 0x00000010 ; TIM6 counter stopped when core is halted
DBGMCU_APB1_FZ_DBG_TIM7_STOP EQU 0x00000020 ; TIM7 counter stopped when core is halted
DBGMCU_APB1_FZ_DBG_RTC_STOP EQU 0x00000400 ; RTC Counter stopped when Core is halted
DBGMCU_APB1_FZ_DBG_WWDG_STOP EQU 0x00000800 ; Debug Window Watchdog stopped when Core is halted
DBGMCU_APB1_FZ_DBG_IWDG_STOP EQU 0x00001000 ; Debug Independent Watchdog stopped when Core is halted
DBGMCU_APB1_FZ_DBG_I2C1_SMBUS_TIMEOUT EQU 0x00200000 ; SMBUS timeout mode stopped when Core is halted
DBGMCU_APB1_FZ_DBG_I2C2_SMBUS_TIMEOUT EQU 0x00400000 ; SMBUS timeout mode stopped when Core is halted
;***************** Bit definition for DBGMCU_APB2_FZ register *************
DBGMCU_APB2_FZ_DBG_TIM9_STOP EQU 0x00000004 ; TIM9 counter stopped when core is halted
DBGMCU_APB2_FZ_DBG_TIM10_STOP EQU 0x00000008 ; TIM10 counter stopped when core is halted
DBGMCU_APB2_FZ_DBG_TIM11_STOP EQU 0x00000010 ; TIM11 counter stopped when core is halted
END