| /* ---------------------------------------------------------------------------- |
| * SAM Software Package License |
| * ---------------------------------------------------------------------------- |
| * Copyright (c) 2012, Atmel Corporation |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following condition is met: |
| * |
| * - Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the disclaimer below. |
| * |
| * Atmel's name may not be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
| * DISCLAIMED. IN NO EVENT SHALL ATMEL 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. |
| * ---------------------------------------------------------------------------- |
| */ |
| |
| /** |
| * \brief CMSIS Example |
| * \mainpage CMSIS Example |
| * |
| * \section Purpose |
| * |
| * The cmsis example will help new users get familiar with |
| * basic cmsis utilities of SAM3 and SAM4 microcontrollers. |
| * |
| * The example will execute the following tests: |
| * - The application will flash the LED per second. The second |
| * is calculated by the standard system tick interface of cmsis. |
| * |
| * \section Requirements |
| * |
| * This package can be used with SAM3 and SAM4 evaluation kits. |
| * |
| * \section Description |
| * The cmsis example will use the system tick of the Cortex-M. |
| * |
| * \section Usage |
| * |
| * -# Build the program and download it into the evaluation board. Please |
| * refer to the |
| * <a href="http://www.atmel.com/dyn/resources/prod_documents/doc6224.pdf"> |
| * SAM-BA User Guide</a>, the |
| * <a href="http://www.atmel.com/dyn/resources/prod_documents/doc6310.pdf"> |
| * GNU-Based Software Development</a> application note or the |
| * <a href="ftp://ftp.iar.se/WWWfiles/arm/Guides/EWARM_UserGuide.ENU.pdf"> |
| * IAR EWARM User Guide</a>, depending on the solutions that users choose. |
| * |
| */ |
| |
| #include "sam.h" |
| |
| #include "conf_board.h" |
| |
| __INLINE static void delay_ms(uint32_t dw_dly_ticks); |
| __INLINE static void led_config(void); |
| __INLINE static void led_on(uint32_t dw_led); |
| __INLINE static void led_off(uint32_t dw_led); |
| |
| /* Systick Counter */ |
| static volatile uint32_t dw_ms_ticks = 0U; |
| |
| /** |
| * \brief SysTick_Handler. |
| */ |
| void SysTick_Handler(void) |
| { |
| /* Increment counter necessary in delay(). */ |
| dw_ms_ticks++; |
| } |
| |
| /** |
| * \brief Delay number of tick Systicks (happens every 1 ms). |
| */ |
| __INLINE static void delay_ms(uint32_t dw_dly_ticks) |
| { |
| uint32_t dw_cur_ticks; |
| |
| dw_cur_ticks = dw_ms_ticks; |
| while ((dw_ms_ticks - dw_cur_ticks) < dw_dly_ticks) { |
| } |
| } |
| |
| /** |
| * \brief Configure LED pins. |
| */ |
| __INLINE static void led_config(void) |
| { |
| /* Set up LED pins. */ |
| LED0_PIO->PIO_PER = LED0_MASK; |
| LED0_PIO->PIO_OER = LED0_MASK; |
| LED0_PIO->PIO_PUDR = LED0_MASK; |
| } |
| |
| /** |
| * \brief Switch on LED. |
| */ |
| __INLINE static void led_on(uint32_t dw_led) |
| { |
| /* Turn On LED. */ |
| LED0_PIO->PIO_CODR = dw_led; |
| } |
| |
| /** |
| * \brief Switch off LED. |
| */ |
| __INLINE static void led_off(uint32_t dw_led) |
| { |
| /* Turn Off LED. */ |
| LED0_PIO->PIO_SODR = dw_led; |
| } |
| |
| /** |
| * \brief Application entry point. |
| * |
| * \return Unused (ANSI-C compatibility). |
| */ |
| int main(void) |
| { |
| /* Initilize the SAM3 system */ |
| SystemInit(); |
| |
| WDT->WDT_MR = WDT_MR_WDDIS; |
| |
| /* Set up SysTick Timer for 1 msec interrupts. */ |
| if (SysTick_Config(SystemCoreClock / (uint32_t) 1000)) { |
| /* Capture error. */ |
| while (1) { |
| } |
| } |
| |
| led_config(); |
| |
| /* Flash the LED. */ |
| while (1) { |
| /* Turn on the LED. */ |
| led_on(LED0_MASK); |
| /* Delay 1000 Msec. */ |
| delay_ms((uint32_t) 1000); |
| |
| /* Turn off the LED. */ |
| led_off(LED0_MASK); |
| /* Delay 1000 Msec. */ |
| delay_ms((uint32_t) 1000); |
| } |
| } |