Built-in Routines

The mikroBasic PRO for ARM compiler provides a set of useful built-in utility functions. Built-in functions do not have any special requirements. You can use them in any part of your project.

The Delay_us and Delay_ms routines are implemented as “inline”; i.e. code is generated in the place of a call, so the call doesn’t count against the nested call limit.

The Vdelay_ms, Vdelay_advanced_ms, Delay_Cyc, Delay_Cyc_Long, Get_Fosc_kHz and Get_Fosc_Per_Cyc are actual Basic routines. Their sources can be found in the __Lib_Delays.mbas file located in the Uses folder of the compiler.

Lo

Prototype

sub function Lo(dim Argument as byte..float) as byte

Description

Function returns the lowest byte of Argument. Function does not interpret bit patterns of Argument – it merely returns 8 bits as found in register.

This is an “inline” routine; code is generated in the place of the call, so the call doesn’t count against the nested call limit.

Parameters
  • Argument: input value. Can be 16-bit or 32-bit value.
Returns

Lowest 8 bits (byte) of Argument, bits 7..0.

Requires

Arguments must be variable of scalar type (i.e. Arithmetic Types and Pointers).

Example
d = 0x12345678 	
tmp = Lo(d)  ' Equals 0x78

Lo(d) = 0xAA ' d equals 0x123456AA
Notes

None.

Hi

Prototype

sub function Hi(dim Argument as as word..float) as byte

Description

Function returns next to the lowest byte of Argument. Function does not interpret bit patterns of Argument – it merely returns 8 bits as found in register.

This is an “inline” routine; code is generated in the place of the call, so the call doesn’t count against the nested call limit.

Parameters
  • Argument: input value. Can be 16-bit or 32-bit value.
Returns

Returns next to the lowest byte of Argument, bits 8..15.

Requires

Arguments must be variable of scalar type (i.e. Arithmetic Types and Pointers).

Example
d = 0x12345678 	
tmp = Hi(d)  ' Equals 0x56

Hi(d) = 0xAA ' d equals 0x1234AA78
Notes

None.

Higher

Prototype

sub function Higher(dim Argument as as longword..float) as byte

Description

Function returns next to the highest byte of Argument. Function does not interpret bit patterns of Argument – it merely returns 8 bits as found in register.

This is an “inline” routine; code is generated in the place of the call, so the call doesn’t count against the nested call limit.

Parameters
  • Argument: input value. Can be of longword, longint or float type.
Returns

Returns next to the highest byte of Argument, bits 16..23.

Requires

Arguments must be variable of scalar type (i.e. Arithmetic Types and Pointers).

Example
d = 0x12345678
tmp = Higher(d)  ' Equals 0x34

Higher(d) = 0xAA ' d equals 0x12AA5678
Notes

None.

Highest

Prototype

sub function Highest(dim Argument as longword..float) as byte

Description

Function returns the highest byte of Argument. Function does not interpret bit patterns of Argument – it merely returns 8 bits as found in register.

This is an “inline” routine; code is generated in the place of the call, so the call doesn’t count against the nested call limit.

Parameters
  • Argument: input value. Can be of longword, longint or float type.
Returns

Returns the highest byte of Argument, bits 24..31.

Requires

Arguments must be variable of scalar type (i.e. Arithmetic Types and Pointers).

Example
d = 0x12345678 	
tmp = Highest(d)  ' Equals 0x12

Highest(d) = 0xAA ' d equals 0xAA345678
Notes

None.

LoWord

Prototype

sub function LoWord(dim Argument as word..float) as word

Description

The function returns low word of Argument. The function does not interpret bit patterns of Argument – it merely returns 16 bits as found in register.

Parameters
  • Argument: input value. Can be of word..float type.
Returns

Low word of Argument, bits 15..0.

Requires

Nothing.

Example
d = 0x12345678 	
tmp = LoWord(d)  ' Equals 0x5678

LoWord(d) = 0xAAAA ' d equals 0x1234AAAA
Notes

None.

HiWord

Prototype

sub function HiWord(dim Argument as longword..float) as word

Description

The function returns high word of Argument. The function does not interpret bit patterns of Argument – it merely returns 16 bits as found in register.

Parameters
  • Argument: input value. Can be of longword, longint or float type.
Returns

High word of Argument, bits 31..16.

Requires

Nothing.

Example
d = 0x12345678 	
tmp = HiWord(d)  ' Equals 0x1234

HiWord(d) = 0xAAAA ' d equals 0xAAAA5678
Notes

None.

HigherWord

Prototype

sub function HigherWord(dim Argument as uint64..extended) as word

Description

The function returns higher word of Argument. The function does not interpret bit patterns of Argument – it merely returns 16 bits as found in register.

Parameters
  • Argument: input value. Can be of int64, uint64 or extended type.
Returns

Higher word of Argument, bits 47..32.

Requires

Nothing.

Example
d = 0x1122334455667788
tmp = HigherWord(d)  ' Equals 0x33344

HigherWord(d) = 0xAAAA ' d equals 0x1122AAAA55667788
Notes

None.

HighestWord

Prototype

sub function HighestWord(dim Argument as uint64..extended) as word

Description

The function returns highest word of Argument. The function does not interpret bit patterns of Argument – it merely returns 16 bits as found in register.

Parameters
  • Argument: input value. Can be of int64, uint64 or extended type.
Returns

Highest word of Argument, bits 63..48.

Requires

Nothing.

Example
d = 0x1122334455667788
tmp = HighestWord(d)  ' Equals 0x1122

HighestWord(d) = 0xAAAA ' d equals 0xAAAA334455667788
Notes

None.

LoDword

Prototype

sub function LoDword(dim Argument as longword..extended) as dword

Description

The function returns low longword of Argument. The function does not interpret bit patterns of Argument – it merely returns 32 bits as found in register.

Parameters
  • Argument: input value. Can be of 32-bit or 64-bit type.
Returns

Low longword of Argument, bits 31..0.

Requires

Nothing.

Example
d = 0x1122334455667788
tmp = LoDword(d)  ' Equals 0x55667788

LoDword(d) = 0xAAAAAAAA ' d equals 0x11223344AAAAAAAA
Notes

None.

HiDword

Prototype

sub function HiDword(dim Argument as uint64..extended) as dword

Description

The function returns high longword of Argument. The function does not interpret bit patterns of Argument – it merely returns 32 bits as found in register.

Parameters
  • Argument: input value. Can be of int64, uint64 or extended type.
Returns

High longword of Argument, bits 63..32.

Requires

Nothing.

Example
d = 0x1122334455667788
tmp = HiDword(d)  ' Equals 0x11223344

HiDword(d) = 0xAAAAAAAA; ' d equals 0xAAAAAAAA55667788
Notes

None.

Inc

Prototype

sub procedure Inc(dim byref par as longint)

Description

Increases parameter par by 1.

Parameters
  • par: value which will be incremented by 1
Returns

Nothing.

Requires

Nothing.

Example
p = 4
Inc(p)  ' p is now 5
Notes

None.

Dec

Prototype

sub procedure Dec(dim byref par as longint)

Description

Decreases parameter par by 1.

Parameters
  • par: value which will be decremented by 1
Returns

Nothing.

Requires

Nothing.

Example
p = 4
Dec(p)  ' p is now 3
Notes

None.

Chr

Prototype

sub function Chr(dim code_ as byte) as char

Description

Function returns a character associated with the specified character code_. Numbers from 0 to 31 are the standard non-printable ASCII codes.

This is an “inline” routine; the code is generated in the place of the call.

Parameters
  • code_: input character
Returns

Returns a character associated with the specified character code_.

Requires

Nothing.

Example
c = Chr(10)  ' returns the linefeed character
Notes

None.

Ord

Prototype

sub function Ord(dim character as char) as byte

Description

Function returns ASCII code of the character.

This is an “inline” routine; the code is generated in the place of the call.

Parameters
  • character: input character
Returns

ASCII code of the character.

Requires

Nothing.

Example
c = Ord("A")  ' returns 65
Notes

None.

SetBit

Prototype

sub procedure SetBit(dim byref register_ as word, dim rbit as byte)

Description

Function sets the bit rbit of register_. Parameter rbit needs to be a variable or literal with value 0..15. For more information on register identifiers see Predefined Globals and Constants .

This is an “inline” routine; the code is generated in the place of the call.

Parameters
  • register_: desired register
  • rbit: desired bit
Returns

Nothing.

Requires

Nothing.

Example
SetBit(GPIO_PORTB, 2)  ' Set GPIO_PORTB.2
Notes

None.

ClearBit

Prototype

sub procedure ClearBit(dim byref register_ as word, dim rbit as byte)

Description

Function clears the bit rbit of register. Parameter rbit needs to be a variable or literal with value 0..15. See Predefined globals and constants for more information on register identifiers.

This is an “inline” routine; code is generated in the place of the call, so the call doesn’t count against the nested call limit.

Parameters
  • register_: desired register
  • rbit: desired bit
Returns

Nothing.

Requires

Nothing.

Example
ClearBit(GPIO_PORTC, 7)  ' Clear GPIO_PORTC.7
Notes

None.

TestBit

Prototype

sub function TestBit(dim register_, rbit as byte) as byte

Description

Function tests if the bit rbit of register is set. If set, function returns 1, otherwise returns 0. Parameter rbit needs to be a variable or literal with value 0..15. See Predefined globals and constants for more information on register identifiers.

This is an “inline” routine; code is generated in the place of the call, so the call doesn’t count against the nested call limit.

Parameters
  • register_: desired register
  • rbit: desired bit
Returns

If the bit is set, returns 1, otherwise returns 0.

Requires

Nothing.

Example
flag = TestBit(GPIO_PORTE, 2)  ' 1 if GPIO_PORTE.2 is set, otherwise 0
Notes

None.

Delay_us

Prototype

sub procedure Delay_us(const time_in_us as longword)

Description

Creates a software delay in duration of Time_In_us microseconds.

This is an “inline” routine; the code is generated in the place of the call, so the call doesn’t count against the nested call limit.

Parameters
  • Time_In_us: delay time in microseconds. Valid values: constant values, range of applicable constants depends on the oscillator frequency
Returns

Nothing.

Requires

Nothing.

Example
Delay_us(1000)  ' One millisecond pause
Notes

None.

Delay_ms

Prototype

sub procedure Delay_ms(const time_in_ms as longword)

Description

Creates a software delay in duration of Time_In_ms milliseconds.

This is an “inline” routine; the code is generated in the place of the call, so the call doesn’t count against the nested call limit.

Parameters
  • Time_In_ms: delay time in milliseconds. Valid values: constant values, range of applicable constants depends on the oscillator frequency
Returns

Nothing.

Requires

Nothing.

Example
Delay_ms(1000)  ' One second pause
Notes

For generating delays with variable as input parameter use the Vdelay_ms routine.

VDelay_ms

Prototype

sub procedure Vdelay_ms(dim time_in_ms as word)

Description

Creates a software delay in duration of Time_ms milliseconds. Generated delay is not as precise as the delay created by Delay_ms.

Parameters
  • Time_ms: delay time in milliseconds
Returns

Nothing.

Requires

Nothing.

Example
pause = 1000
' ...
Vdelay_ms(pause)  ' ~ one second pause
Notes

    None.

VDelay_advanced_ms

Prototype

sub procedure VDelay_advanced_ms(dim time_ms, Current_Fosc_kHz as word)

Description

Creates a software delay in duration of time_in_ms milliseconds (a variable), for a given oscillator frequency. Generated delay is not as precise as the delay created by Delay_ms.

Note that Vdelay_ms is library function rather than a built-in routine; it is presented in this topic for the sake of convenience.

Parameters
  • time_ms: delay time in milliseconds
  • Current_Fosc_kHz: frequency in kHz
Returns

Nothing.

Requires

Nothing.

Example
pause = 1000
fosc = 10000

VDelay_advanced_ms(pause, fosc)  ' Generates approximately one second pause, for a oscillator frequency of 10 MHz
Notes

None.

Delay_Cyc

Prototype

sub procedure Delay_Cyc(dim x, y as word)

Description

Creates a delay based on MCU clock. Delay lasts for x*16384 + y MCU clock cycles.

Parameters
  • x: NumberOfCycles divided by 16384
  • y: remainder of the NumberOfCycles/16384 division
Returns

Nothing.

Requires

Nothing.

Example
Delay_Cyc(1, 10)  ' 1x16384 + 10 = 16394 cycles pause 
Notes

Delay_Cyc is a library function rather than a built-in routine; it is presented in this topic for the sake of convenience.

Delay_Cyc_Long

Prototype

sub procedure Delay_Cyc_Long(dim CycNo as word)

Description

Creates a delay based on MCU clock. Delay lasts for CycNo MCU clock cycles.

Parameters
  • CycNo: number of MCU cycles
Returns

Nothing.

Requires

Nothing.

Example
Delay_Cyc_Long(16384)  ' 16384 cycles pause 
Notes

Delay_Cyc_Long is a library function rather than a built-in routine; it is presented in this topic for the sake of convenience.

Clock_kHz

Prototype

sub function Clock_kHz() as longint

Description

Returns device clock in kHz, rounded to the nearest integer.

This is an “inline” routine; the code is generated in the place of the call.

Parameters

None.

Returns

Device clock in kHz, rounded to the nearest integer.

Requires

Nothing.

Example
clk = Clock_kHz()
Notes

None.

Clock_MHz

Prototype

sub function Clock_MHz() as word

Description

Returns device clock in MHz, rounded to the nearest integer.

This is an “inline” routine; the code is generated in the place of the call.

Parameters

None.

Returns

Device clock in MHz, rounded to the nearest integer.

Requires

Nothing.

Example
clk = Clock_MHz()
Notes

None.

Get_Fosc_kHz

Prototype

sub function Get_Fosc_kHz() as longint

Description

Function returns device clock in kHz, rounded to the nearest integer.

Parameters

None.

Returns

Device clock in kHz.

Requires

Nothing.

Example
clk = Get_Fosc_kHz()
Notes

Get_Fosc_kHz is a library function rather than a built-in routine; it is presented in this topic for the sake of convenience.

Get_Fosc_Per_Cyc

Prototype

sub function Get_Fosc_Per_Cyc() as word

Description

Function returns device's clock per cycle, rounded to the nearest integer.

Note that Get_Fosc_Per_Cyc is library function rather than a built-in routine; it is presented in this topic for the sake of convenience.

Parameters

None.

Returns

Device's clock per cycle, rounded to the nearest integer.

Requires

Nothing.

Example
dim clk_per_cyc as word
...
clk_per_cyc = Get_Fosc_Per_Cyc()
Notes

None.

SystemReset

Prototype

sub procedure SystemReset()

Description

This function will perform a software reset of the entire device. The processor and all peripherals are reset and all device registers will return to their default values
(with the exception of the reset cause register, which will maintain its current value but have the software reset bit set as well).

Parameters

None.

Returns

Nothing.

Requires

Nothing.

Example
SystemReset()
Notes

None.

DisableContextSaving

Prototype

sub procedure DisableContextSaving()

Description

Use the DisableContextSaving() to instruct the compiler not to automatically perform context-switching. This means that no register will be saved/restored by the compiler on entrance/exit from interrupt service routine. This enables the user to manually write code for saving registers upon entrance and to restore them before exit from interrupt.

Parameters

None.

Returns

Nothing.

Requires

This routine must be called from main.

Example
DisableContextSaving() ' instruct the compiler not to automatically perform context-switching
Notes

None.

SetFuncCall

Prototype

sub procedure SetFuncCall(dim FuncName as string)

Description

If the linker encounters an indirect function call (by a pointer to function), it assumes that any routine whose address was taken anywhere in the program can be called at that point if it's prototype matches the pointer declaration.

Use the SetFuncCall directive within routine body to instruct the linker which routines can be called indirectly from that routine :
SetFunCCall (called_func[, ,...])

Routines specified in the SetFunCCall argument list will be linked if the routine containing SetFunCCall directive is called in the code no matter whether any of them was explicitly called or not.

Thus, placing SetFuncCall directive in main will make compiler link specified routines always.

Parameters
  • FuncName: function name
Returns

Nothing.

Requires

Nothing.

Example:
sub procedure first(p, q as byte)
...
  SetFuncCall(second) ' let linker know that we will call the routine 'second'
...
end sub
Notes

The SetFuncCall directive can help the linker to optimize function frame allocation in the compiled stack.

SetOrg

Prototype

sub procedure SetOrg(dim RoutineName as string, dim address as longint)

Description

Use the SetOrg() routine to specify the starting address of a routine in ROM.

Parameters
  • RoutineName: routine name
  • address: starting address
Returns

Nothing.

Requires

This routine must be called from main.

Example
SetOrg(UART1_Write, 0x1234)
Notes

None.

GetDateTime

Prototype

sub function GetDateTime() as string

Description

Use the GetDateTime() to get date and time of compilation as string in your code.

Parameters

None.

Returns

String with date and time when this routine is compiled.

Requires

Nothing.

Example
str = GetDateTime()
Notes

None.

DoGetDateTime

Prototype

sub function DoGetDateTime() as string

Description

Use the DoGetDateTime() to get date and time of compilation as string in your code.

Parameters

None.

Returns

String with date and time when this routine is compiled.

Requires

Nothing.

Example
str = DoGetDateTime()
Notes

None.

GetVersion

Prototype

sub function GetVersion() as string

Description

Use the GetVersion() to get the current version of compiler.

Parameters

None.

Returns

String with current compiler version.

Requires

Nothing.

Example
str = GetVersion() ' for example, str will take the value of '8.2.1.6'
Notes

None.

DoGetVersion

Prototype

sub function DoGetVersion() as string

Description

Use the DoGetVersion() to get the current version of compiler.

Parameters

None.

Returns

String with current compiler version.

Requires

Nothing.

Example
str = DoGetVersion() ' for example, str will take the value of '8.2.1.6'
Notes

None.

CPU_REG_GET

Prototype

sub function CPU_REG_GET(const reg as TCPUREG) as longword

Description

Function returns the value of the core register, based upon the argument entered.

Parameters

Parameter must be a constant from the enumerated built-in constants list, which can be found at the bottom of this page.

Returns

Value of the core register.

Requires

Nothing.

Example
dim register_value as longword

register_value = CPU_REG_GET(CPU_PRIMASK)
Notes

None.

CPU_REG_SET

Prototype

sub procedure CPU_REG_SET(const register as TCPUREG, dim value as longword)

Description

Function sets the value of the core register, based upon the register argument.

Parameters
  • register: Register, must be a constant from the enumerated built-in constants list, which can be found at the bottom of this page.
  • value: Register value.
Returns

Nothing.

Requires

Nothing.

Example
CPU_REG_SET(CPU_PRIMASK)
Notes

None.

RestoreInterrupts

Prototype

sub procedure RestoreInterrupts(dim primask as longword)

Description

Restores (enables or disables) core interrupts based on the last PRIMASK register value given as a routine parametar.

Parameters

None.

Returns

Returns the value stored in the PRIMASK register before the interrupts were enabled/disabled.

Requires

Nothing.

Example
RestoreInterrupts(CPU_PRIMASK)
Notes

None.

EnableInterrupts

Prototype

sub function EnableInterrupts() as longword

Description

This function enables the processor interrupt and allows the processor to respond to interrupts.
This does not affect the set of interrupts enabled in the interrupt controller; it just gates the single interrupt from the controller to the processor.

Parameters

None.

Returns

Returns the value stored in the PRIMASK register.

Requires

Nothing.

Example
status_value = EnableInterrupts()
Notes

None.

DisableInterrupts

Prototype

sub function DisableInterrupts() as longword

Description

This function disables the processor interrupt and prevents the processor from receiving interrupts.
This does not affect the set of interrupts enabled in the interrupt controller; it just gates the single interrupt from the controller to the processor.

Parameters

Returns the value stored in the PRIMASK register.

Returns

Nothing.

Requires

Nothing.

Example
status_value = DisableInterrupts()
Notes

None.

NVIC_IntEnable

Prototype

sub procedure NVIC_IntEnable(const ivt as longword)

Description

This procedure enables an interrupt vector. The specified interrupt vector is enabled in the interrupt controller.
Other enables for the interrupt (such as at the peripheral level) are unaffected by this procedure.

Parameters
  • ivt: - specifies the interrupt vector to be enabled.
Returns

Nothing.

Requires

Nothing.

Example
NVIC_IntEnable(IVT_INT_TIMER0A)
Notes

The list of the available interrupt vectors be be seen in Code Assistant, by typing IVT and pressing Ctrl + Space,
or in the definition file of the MCU, which can be opened by pressing Ctrl + Alt + D.

NVIC_IntDisable

Prototype

sub procedure NVIC_IntDisable(const ivt as longword)

Description

This procedure disables an interrupt vector. The specified interrupt vector is disabled in the interrupt controller.
Other enables for the interrupt (such as at the peripheral level) are unaffected by this function.

Parameters
  • ivt: - specifies the interrupt vector to be enabled.
Returns

Nothing.

Requires

Nothing.

Example
NVIC_IntDisable(IVT_INT_TIMER0A)
Notes

The list of the available interrupt vectors be be seen in Code Assistant, by typing IVT and pressing Ctrl + Space,
or in the definition file of the MCU, which can be opened by pressing Ctrl + Alt + D.

New

Prototype

sub procedure New(dim byref Ptr as pointer);

Description

Allocates a block of memory from the memory Heap, taking care of the alignment. It is recommended to use this routine instead of GetMem.

Parameters
  • Ptr: variable of any pointer type, pointing to an object which is to be allocated.
Returns

Returns a pointer to the memory block allocated by the function; Otherwise 0 (no free blocks of memory are large enough).

Requires

Nothing.

Example

Notes

None.

Dispose

Prototype

sub procedure Dispose(dim byref Ptr as pointer)

Description

Disposes a block of memory from the memory Heap, referenced by Ptr and returns its memory to the Heap.

Parameters
  • Ptr: variable of any pointer type previously assigned by the New procedure.
Returns

Requires

Nothing.

Example

Notes

After calling this routine, the value of Ptr is nil (0) (not assigned pointer).

Core Registers
CPU_APSR CPU_IAPSR CPU_EAPSR CPU_XPSR CPU_IPSR CPU_EPSR CPU_IEPSR
CPU_MSP CPU_PSP CPU_PRIMASK CPU_BASEPRI CPU_BASEPRI CPU_BASEPRI_MAX CPU_CONTROL
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