MSP430 IAR C/C++ Compiler reference guide - Rice University

Descriptions of intrinsic functionsDescriptionWrites data to the MSP430X full 1-Mbyte memory area. This intrinsic function isintended to be used in the Small data model. In the Medium and Large data models it isrecommended to use __data20 variables and pointers.The following functions are supported:Function Operation size Alignmentunsigned char __data20_write_char 1 byte 1unsigned short __data20_write_short 2 bytes 2unsigned long __data20_write_long 4 bytes 2Table 38: Functions for writing data that has a 20-bit address__delay_cyclesSyntaxvoid __delay_cycles(unsigned long cycles);ParameterscyclesThe time delay in number of cycles.DescriptionInserts assembler instructions that delays execution the number of clock cyclesspecified.__disable_interruptSyntaxDescriptionvoid __disable_interrupt(void);Disables interrupts by inserting the DI instruction.__enable_interruptSyntaxDescriptionvoid __enable_interrupt(void);Enables interrupts by inserting the EI instruction.220MSP430 IAR C/C++ CompilerReference Guide