+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction. Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License. This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
+ * -->
+ *
+ *
+ * \brief 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 $Id$
+ * \author Daniele Basile <asterix@develer.com>
+ */
+
+#include "hw/pwm_map.h" // For PwmDev and channel avaible on thi target
+#include "cfg/cfg_pwm.h"
+#include <cfg/macros.h>
+#include <cfg/debug.h>
+
+// Define logging setting (for cfg/log.h module).
+#define LOG_LEVEL PWM_LOG_LEVEL
+#define LOG_FORMAT PWM_LOG_FORMAT
+#include <cfg/log.h> // for logging system
+
+#include <cpu/types.h>
+#include <cpu/irq.h>
+
+#include <drv/pwm.h>
+#include CPU_HEADER(pwm)
+
+#define DELAY_TIME 10000 // This is a number of for cycle before to set a new value of duty
+#define PWM_DUTY_INC 200 // Incremental value for duty
+
+
+/**
+ * Simple struct to store
+ * the testing value.
+ */
+typedef struct PwmTest
+{
+ int ch;
+ bool pol;
+ pwm_freq_t freq;
+ pwm_duty_t duty;
+} PwmTest;
+
+/*
+ * Test settings for each channel.
+ *
+ * Frequency value is in Hz.
+ *
+ * Esample of value for duty cycle"
+ *
+ * - 100% => 0xFFFFFFFF
+ * - 80% => 0xCCCCCCCC
+ * - 75% => 0xBFFFFFFF
+ * - 50% => 0x7FFFFFFF
+ * - 25% => 0x3FFFFFFF
+ * - 33% => 0x55555555
+ * - 16% => 0x2AAAAAAA
+ */
+static PwmTest pwm_test_cfg[PWM_CNT] =
+{
+ /* Channel, polarity, frequecy, duty */
+ { 0, false, 100UL, 0 }, /* 100Hz, 0% duty */
+ { 1, false, 1000UL, 0x7FFF }, /* 1KHz, 50% duty */
+ { 2, false, 12356UL, 0x5555 }, /* 12,356KHz, 33% duty */
+ { 3, false, 100000UL, 0xCCCC } /* 100KHz, 80% duty */
+};
+
+/**
+ * Setup all needed to test PWM on AT91
+ *
+ */
+int pwm_testSetUp(void)
+{
+ LOG_INFO("Init pwm..");
+ pwm_init();
+ LOG_INFO("done.\n");
+
+ return 0;
+}
+
+
+/**
+ * Test suit for genation of pwm waveform.
+ *
+ */
+int pwm_testRun(void)
+{
+ pwm_duty_t duty = 0;
+ int delay = 0;
+
+ pwm_testSetUp();
+
+ LOG_INFO("\n\n===== BeRTOS PWM test =====\n\n");
+
+ for (int i = 0; i < PWM_CNT; i++)
+ {
+ LOG_INFO("PWM test ch[%d]\n", pwm_test_cfg[i].ch);
+ LOG_INFO("--> set pol[%d]", pwm_test_cfg[i].pol);
+ LOG_INFO("\n(Note: if polarity is false the output waveform start at high level,\n see low level implentation for detail)i\n");
+ pwm_setPolarity(pwm_test_cfg[i].ch, pwm_test_cfg[i].pol);
+ LOG_INFO("..ok\n");
+
+ LOG_INFO("--> set freq[%ld]", pwm_test_cfg[i].freq);
+ pwm_setFrequency(pwm_test_cfg[i].ch, pwm_test_cfg[i].freq);
+ LOG_INFO("..ok\n");
+
+ LOG_INFO("--> set duty[%d]", pwm_test_cfg[i].duty);
+ pwm_setDuty(pwm_test_cfg[i].ch, pwm_test_cfg[i].duty);
+ LOG_INFO("..ok\n");
+
+ LOG_INFO("--> Enable pwm");
+ pwm_enable(pwm_test_cfg[i].ch, true);
+ LOG_INFO("..ok\n");
+ }
+
+ LOG_INFO("\n-------------------------- Dinamic PWM test --------------------------\n");
+ LOG_INFO("We test if driver change correctly the duty cycle durind it working.\n");
+ LOG_INFO("On your oscilloscope you should see the pwm singal that increase until\n");
+ LOG_INFO("the duty value is 100%%. After this value we invert a polarity of pwm,\n");
+ LOG_INFO("and repeat the test. But now you should see that pwm duty decreasing until\n");
+ LOG_INFO("0%% duty value.\nAfter that, we repeat the test from beginning.\n\n");
+
+ for (;;)
+ {
+ if (delay == DELAY_TIME)
+ {
+ for (int i = 0; i < PWM_CNT; i++)
+ {
+ LOG_INFO("PWM test ch[%d]\n", pwm_test_cfg[i].ch);
+ LOG_INFO("--> set duty[%d]", duty);
+ pwm_setDuty(pwm_test_cfg[i].ch, duty);
+ LOG_INFO("..ok\n");
+ }
+ LOG_INFO("\n++++++++++++++++++++\n");
+ duty += PWM_DUTY_INC;
+ delay = 0;
+ }
+
+ //Reset duty cycle overflow
+ if (duty >= (pwm_duty_t)0xFFFF)
+ {
+ duty = 0;
+ for (int i = 0; i < PWM_CNT; i++)
+ {
+ LOG_INFO("Duty reset, swap polarity:\n");
+ LOG_INFO("--> pol from [%d] to [%d]", pwm_test_cfg[i].pol, !pwm_test_cfg[i].pol);
+
+ pwm_test_cfg[i].pol = !pwm_test_cfg[i].pol;
+ pwm_setPolarity(pwm_test_cfg[i].ch, pwm_test_cfg[i].pol);
+
+ LOG_INFO("..ok\n");
+ }
+ LOG_INFO("\n++++++++++++++++++++\n");
+ }
+ delay++;
+ }
+
+ return 0;
+}
+
+/**
+ * End a PWM Test.
+ * (Unused)
+ */
+int pwm_testTearDown(void)
+{
+ /* */
+ return 0;
+}
+
+/*
+ * Empty main.
+ *
+ * Look it as exmple or use it if
+ * you want test a PWM driver stand alone.
+ */
+#if 0
+int main(void)
+{
+ IRQ_ENABLE;
+ kdbg_init();
+
+ pwm_testRun();
+
+ for(;;)
+ {
+ }
+
+}
+#endif
+
+