pwm_hwtest.c File Reference

Test for PWM driver (implementation). More...

#include "hw/pwm_map.h"
#include "cfg/cfg_pwm.h"
#include <cfg/macros.h>
#include <cfg/debug.h>
#include <cfg/log.h>
#include <cpu/types.h>
#include <cpu/irq.h>
#include <drv/pwm.h>
#include "drv/PP_CAT3(pwm, _, CPU_ID).h"

Go to the source code of this file.

Data Structures

struct  PwmTest
 Simple struct to store the testing value. More...

Typedefs

typedef struct PwmTest PwmTest
 Simple struct to store the testing value.

Functions

int pwm_testSetup (void)
 Setup all needed to test PWM on AT91.
void NORETURN pwm_testRun (void)
 Test suit for genation of pwm waveform.
int pwm_testTearDown (void)
 End a PWM Test.

Detailed Description

Test for PWM driver (implementation).

This is a simple test for PWM driver. This module is target independent, so you can test all target that BeRTOS support. To use this test you should include a pwm_map.h header where are defined the PWM channels for your target. Then you should add or remove a test setting in pwm_test_cfg array, and edit a value for your specific test. Afther this, all is ready and you can test PWM driver.

The test check first if all PWM channel starts, and then try to change a PWM duty cicle for all channel. The change of duty cycle is operate when a PWM channel is enable, in this way you can see if a pwm signal is clean and work properly. The duty value is change incrementaly, and when it arrive to 100% or 0%, we reset the duty value and restart the test. Further the duty test, we check also a PWM polarity, infact when we reach a reset duty value, we invert a polary of PWM wavform. So you can see if the hardware manage correctly this situation.

Note: To be simple and target independently we not use a timer module, and so the delay is do with a for cycle.

Version:
Id
pwm_hwtest.c 2541 2009-04-17 14:00:57Z batt
Author:
Daniele Basile <asterix@develer.com>

Definition in file pwm_hwtest.c.

Function Documentation

void NORETURN pwm_testRun ( void   ) 

Test suit for genation of pwm waveform.

Test function prototypes.

Definition at line 135 of file pwm_hwtest.c.

int pwm_testSetup ( void   ) 

Setup all needed to test PWM on AT91.

Definition at line 121 of file pwm_hwtest.c.

int pwm_testTearDown ( void   ) 

End a PWM Test.

(Unused)

Definition at line 212 of file pwm_hwtest.c.