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/*
* Copyright (c) 2013 - 2014, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
///////////////////////////////////////////////////////////////////////////////
// Includes
///////////////////////////////////////////////////////////////////////////////
// SDK Included Files
#include "board.h"
#include "fsl_lptmr_driver.h"
#include "fsl_debug_console.h"
#include "fsl_dac_driver.h"
#include "fsl_os_abstraction.h"
////////////////////////////////////////////////////////////////////////////////
// Definitions
////////////////////////////////////////////////////////////////////////////////
// Timer period: 500000uS
#define TMR_PERIOD 500000U
#if defined(TWR_KV46F150M)
#define LPTMR0_IDX LPTMR_IDX
#endif
const gpio_output_pin_user_config_t lcdBacklight = {
.pinName = GPIO_MAKE_PIN(GPIOE_IDX, 31U),
.config.outputLogic = 1,
.config.slewRate = kPortSlowSlewRate,
.config.driveStrength = kPortLowDriveStrength,
};
////////////////////////////////////////////////////////////////////////////////
// Code
////////////////////////////////////////////////////////////////////////////////
/*!
* @brief LPTMR interrupt call back function.
* The function is used to toggle LED1.
*/
void lptmr_call_back(void)
{
// Toggle LED1
GPIO_DRV_TogglePinOutput(lcdBacklight.pinName);
}
/*!
* @brief Main function
*/
int main (void)
{
// LPTMR configurations
lptmr_user_config_t lptmrConfig =
{
.timerMode = kLptmrTimerModeTimeCounter,
.freeRunningEnable = false,
.prescalerEnable = true,
.prescalerClockSource = kClockLptmrSrcLpoClk,
.prescalerValue = kLptmrPrescalerDivide2,
.isInterruptEnabled = true,
};
// LPTMR driver state information
lptmr_state_t lptmrState;
// Initialize standard SDK demo application pins
hardware_init();
// Initialize LPTMR
LPTMR_DRV_Init(LPTMR0_IDX, &lptmrState, &lptmrConfig);
// Set timer period for TMR_PERIOD seconds
LPTMR_DRV_SetTimerPeriodUs(LPTMR0_IDX, TMR_PERIOD);
// Install interrupt call back function for LPTMR
LPTMR_DRV_InstallCallback(LPTMR0_IDX, lptmr_call_back);
// Start LPTMR
LPTMR_DRV_Start(LPTMR0_IDX);
// Initialize LED1
GPIO_DRV_OutputPinInit(&lcdBacklight);
// Print the initial banner
PRINTF("\r\nHello World!\n\n\r");
dac_converter_config_t MyDacUserConfigStruct;
// Fill the structure with configuration of software trigger. //
DAC_DRV_StructInitUserConfigNormal(&MyDacUserConfigStruct);
// Initialize the DAC Converter. //
DAC_DRV_Init(0, &MyDacUserConfigStruct);
// Output the DAC value. //
uint16_t p = 0x1000;
uint16_t i = 0x2ff;
int8_t d = 1;
while(1) {
if (i == 0x2ff) {
d = 1;
} else if (i == 0x4ff) {
d = -1;
p = p * 7 / 8;
if (p == 0) p = 0x1000;
}
i += d;
DAC_DRV_Output(0, i);
//OSA_TimeDelay(1);
uint16_t c;
for(c = 0; c < p; ++c);
}
}
/* vim: set expandtab ts=4 sw=4: */
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