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AN672

PRECISION32™ SI32LIBRARY OVERVIEW

Silicon Laboratories 

AN672

5. Base Component

COMPONENT: si32BaseComponent

REQUIRES: none

PROVIDES: none

This component provides facilities for logging, error handling, memory allocation, and control flow.

5.1. Build Options

si32Base.h provides benign defaults for all available build options. To change a build option for an application,

enable or disable that option as appropriate in the application's myBuildOptions.h.

si32BuildOption_enable_assertions: Enables si32Assert(). Default is off.

si32BuildOption_enable_logging: Enables logging. Logging must be enabled to use any si32LogXXX()

routine. Default is off.

si32BuildOption_log_flow: Enables si32LogPrologue(), si32LogSelf(), si32LogArg(), si32LogAttr(),

si32LogVar, si32LogEpilogue(). Default is off.

si32BuildOption_log_ref_counts: Enables logging of reference counts if _log_flow is also enabled.

Default is off.

si32BuildOption_tally_allocations: Dynamic allocations encode size information for leak checking.

Default is off.

si32BuildOption_retention_zone_size: Retention allocation zone reserve (for MCUs with retention

RAM). Default is 1.

si32BuildOption_incremental_zone_size: Incremental allocation zone reserve. Default is 1.

si32BuildOption_addressable_labels: Enable use of computed labels instead of switch abuse for local

continuations. Default is off; switch/case is used.

si32BuildOption_logPath: Workstation platforms can log to a file. Default is "/dev/stdout".

5.2. Logging

si32BaseLogger.h defines a number of macros for logging waypoints during program execution. These depend

on the si32HAL and require use of si32HAL/CPU/retarget_<chain>.c to redirect printf/scanf primitives to ITM, a

UART, or some other device.

void si32StartLogging(void): Configures the logging subsystem and initiates logging. For simulation

builds on workstations this opens the log file.

void si32StopLogging(void): Terminates logging. For simulation builds on workstations this closes the log

file.

void si32LogBeSilent(bool yn): Used to temporarily change the state of the logger without disabling it, or

recompiling to turn it off. When silent the log does not send data to ITM etc.

bool si32LogIsSilent(void): Queries whether the log is silent, or verbose.

void si32LogBeIndented(bool yn): Controls whether the log is indented. When YES, si32LogPrologue()

indents the log, and si32LogEpilogue() outdents the log, in addition to logging the entry/exit of a function,

respectively. The default is YES, indent the log.

bool si32LogIsIndented(void): Queries whether the log is indented, or flat.

int si32LogPrint(char* fmt, ...): Prints to the log, with parameters similar to printf. Does not indent, even

when preceded by si32LogBeIndented(YES). Does not append a newline. For io retargeting, it essentially

just wraps printf.

int si32LogTrace(char* fmt, ...): Prints to the log, with parameters similar to printf. It indents per

si32LogBeIndented(yn) and appends a newline.

int si32LogWarning(char* fmt, ...): Prints to the log, with parameters similar to printf. It indents per

si32LogBeIndented(yn). Prepends "WARNING: " and appends a newline.

int si32LogError(char* fmt, ...): Prints to the log, with parameters similar to printf. It indents per

Rev. 0.1

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