Tests for the port expander module. More...

#include "unity.h"
#include "MockHL_i2c.h"
#include "Mockdatabase.h"
#include "Mockdiag.h"
#include "Mocki2c.h"
#include "Mockos.h"
#include "Mockportmacro.h"
#include "pex_cfg.h"
#include "pex.h"
#include "test_assert_helper.h"

Include dependency graph for test_pex.c:

Go to the source code of this file.

Functions
long	FSYS_RaisePrivilege (void)
	Raise privilege. More...

void	setUp (void)

void	tearDown (void)

void	testModuleInterfacesWithInvalidValues (void)

Detailed Description

Tests for the port expander module.

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Author: foxBMS Team

Date: 2021-09-29 (date of creation)

Updated: 2023-10-12 (date of last update)

Version: v1.6.0

Prefix: TEST

Definition in file test_pex.c.

Function Documentation

◆ FSYS_RaisePrivilege()

long FSYS_RaisePrivilege ( void )

Raise privilege.

This alias is mapped to an ASM function and raises to a privileged processor state if the system is currently in user mode. This is done by the following ASM code:

Copy the contents of a CP14 or CP15 coprocessor register (in this case SPSR – Saved Program Status Register) into local register r12:
```
mrs     r12, spsr 
```
Perform bitwise AND on the contents of r12 and 0x0F
write to r0
update condition code flag on result of operation
```
ands    r0, r12, #0x0F      ; return value 
```
Perform a logical OR on the contents of r12 and 0x1F, if equal to condition code flag from previous instruction
write to r12
```
orreq   r12, r12, #0x1F 
```
Conditionally (equal on previous instruction condition code flag) load immediate result from r12 into control field mask byte, PSR[7:0] (privileged software execution) from SPSR
```
msreq   spsr_c, r12 
```
Branch and exchange instruction set
Target address is contained in r14
```
bx      r14 
```

It is important to issue FSYS_SwitchToUserMode() after the privileged mode is no longer needed. Otherwise the system would stay in privileged mode.

The datatype of the return value has to be reevaluated when changing platform and compiler.

Returns: return value is zero if caller was in user mode (type: long)

Definition at line 77 of file test_pex.c.

◆ setUp()

void setUp ( void )

Definition at line 82 of file test_pex.c.

◆ tearDown()

void tearDown ( void )

Definition at line 85 of file test_pex.c.

◆ testModuleInterfacesWithInvalidValues()

void testModuleInterfacesWithInvalidValues ( void )

Definition at line 90 of file test_pex.c.

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Functions