104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/*
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* Copyright (c) 2013, Freescale Semiconductor, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "fsl_device_registers.h"
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#include "milliseconds_delay.h"
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#if TOWER
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#define LED1_OFFSET 7
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#define LED2_OFFSET 19
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#define LED3_OFFSET 0
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#define LED4_OFFSET 1
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#endif // TOWER
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#define DELAY_1MS (1000)
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#define LED_COUNT 4
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static uint8_t led_offset[LED_COUNT] = { LED1_OFFSET, LED2_OFFSET, LED3_OFFSET, LED4_OFFSET };
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static PORT_Type *led_port[LED_COUNT] = { PORTD, PORTB, PORTE, PORTE };
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static GPIO_Type *led_gpio[LED_COUNT] = { GPIOD, GPIOB, GPIOE, GPIOE };
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static void init_hardware(void)
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{
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SIM->SCGC5 |= (SIM_SCGC5_PORTA_MASK | SIM_SCGC5_PORTB_MASK | SIM_SCGC5_PORTC_MASK | SIM_SCGC5_PORTD_MASK |
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SIM_SCGC5_PORTE_MASK);
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uint8_t i;
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for (i = 0; i < LED_COUNT; i++)
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{
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// Enable the LED pins GPIO
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led_port[i]->PCR[led_offset[i]] = PORT_PCR_MUX(1);
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// Set ports to outputs
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led_gpio[i]->PDDR |= (1 << led_offset[i]);
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}
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}
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static void led_toggle(uint32_t leds)
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{
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uint8_t i = 0;
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// led OFF
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for (i = 0; i < LED_COUNT; i++)
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{
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led_gpio[i]->PDOR |= (uint32_t)(1 << led_offset[i]);
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}
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// led ON
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led_gpio[leds]->PDOR &= (uint32_t) ~(1 << led_offset[leds]);
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}
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void delay(void)
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{
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volatile uint32_t delayTicks = 2000000;
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while (delayTicks--)
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{
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__ASM("nop");
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}
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}
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int main(void)
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{
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init_hardware();
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// Note: for ROM development, use this version of delay function,
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// Which is in order to test if the VTCOR is correct.
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milliseconds_delay_init();
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uint32_t leds = 0;
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while (1)
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{
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led_toggle(leds);
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milliseconds_delay(DELAY_1MS);
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++leds;
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if (leds == LED_COUNT)
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{
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leds = 0;
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}
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}
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}
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