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328 lines
13 KiB
C++
328 lines
13 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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// Product: "Dining Philosophers Problem" example, Vanilla kernel
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// Last Updated for Version: 4.4.00
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// Date of the Last Update: Apr 19, 2012
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//
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// Q u a n t u m L e a P s
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// ---------------------------
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// innovating embedded systems
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//
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// Copyright (C) 2002-2012 Quantum Leaps, LLC. All rights reserved.
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//
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// This program is open source software: you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as published
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// by the Free Software Foundation, either version 2 of the License, or
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// (at your option) any later version.
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//
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// Alternatively, this program may be distributed and modified under the
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// terms of Quantum Leaps commercial licenses, which expressly supersede
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// the GNU General Public License and are specifically designed for
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// licensees interested in retaining the proprietary status of their code.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// Contact information:
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// Quantum Leaps Web sites: http://www.quantum-leaps.com
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// http://www.state-machine.com
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// e-mail: info@quantum-leaps.com
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//////////////////////////////////////////////////////////////////////////////
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#include "qp_port.h"
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#include "dpp.h"
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#include "bsp.h"
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#include "lm3s_cmsis.h"
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#include "display96x16x1.h"
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Q_DEFINE_THIS_FILE
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enum ISR_Priorities { // ISR priorities starting from the highest urgency
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GPIOPORTA_PRIO,
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SYSTICK_PRIO,
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// ...
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};
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#define UART_FR_TXFE 0x00000080
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// Local-scope objects -------------------------------------------------------
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static uint32_t l_delay = 0UL; // limit for the loop counter in busyDelay()
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#define PUSH_BUTTON (1 << 4)
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#define USER_LED (1 << 5)
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#ifdef Q_SPY
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QSTimeCtr QS_tickTime_;
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QSTimeCtr QS_tickPeriod_;
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static uint8_t l_SysTick_Handler;
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#define UART_BAUD_RATE 115200
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#define UART_TXFIFO_DEPTH 16
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enum AppRecords { // application-specific trace records
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PHILO_STAT = QS_USER
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};
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#endif
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//............................................................................
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extern "C" void SysTick_Handler(void) __attribute__((__interrupt__));
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extern "C" void SysTick_Handler(void) {
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#ifdef Q_SPY
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uint32_t dummy = SysTick->CTRL; // clear SysTick_CTRL_COUNTFLAG
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QS_tickTime_ += QS_tickPeriod_; // account for the clock rollover
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#endif
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QF::TICK(&l_SysTick_Handler); // process all armed time events
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}
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//............................................................................
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void BSP_init(void) {
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// set the system clock as specified in lm3s_config.h (20MHz from PLL)
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SystemInit();
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// enable clock to the peripherals used by the application
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SYSCTL->RCGC2 |= (1 << 0) | (1 << 2); // enable clock to GPIOA & C
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__NOP(); // wait after enabling clocks
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__NOP();
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__NOP();
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// configure the LED and push button
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GPIOC->DIR |= USER_LED; // set direction: output
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GPIOC->DEN |= USER_LED; // digital enable
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GPIOC->DATA_Bits[USER_LED] = 0; // turn the User LED off
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GPIOC->DIR &= ~PUSH_BUTTON; // set direction: input
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GPIOC->DEN |= PUSH_BUTTON; // digital enable
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Display96x16x1Init(1); // initialize the OLED display
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Display96x16x1StringDraw("Dining Philos", 0, 0);
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Display96x16x1StringDraw("0 ,1 ,2 ,3 ,4", 0, 1);
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if (QS_INIT((void *)0) == 0) { // initialize the QS software tracing
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Q_ERROR();
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}
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QS_OBJ_DICTIONARY(&l_SysTick_Handler);
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}
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//............................................................................
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void BSP_displyPhilStat(uint8_t n, char const *stat) {
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char str[2];
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str[0] = stat[0];
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str[1] = '\0';
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Display96x16x1StringDraw(str, (3*6*n + 6), 1);
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QS_BEGIN(PHILO_STAT, AO_Philo[n]) // application-specific record begin
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QS_U8(1, n); // Philosopher number
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QS_STR(stat); // Philosopher status
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QS_END()
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}
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//............................................................................
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void BSP_driveLED(uint8_t state) {
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if (state != 0) {
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GPIOC->DATA_Bits[USER_LED] = USER_LED; // turn the User LED on
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}
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else {
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GPIOC->DATA_Bits[USER_LED] = 0; // turn the User LED off
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}
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}
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//............................................................................
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void BSP_busyDelay(void) {
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uint32_t volatile i = l_delay;
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while (i-- > 0UL) { // busy-wait loop
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}
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}
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//............................................................................
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void QF::onStartup(void) {
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// set up the SysTick timer to fire at BSP_TICKS_PER_SEC rate
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SysTick_Config(SystemFrequency / BSP_TICKS_PER_SEC);
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// set priorities of all interrupts in the system...
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NVIC_SetPriority(SysTick_IRQn, SYSTICK_PRIO);
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NVIC_SetPriority(GPIOPortA_IRQn, GPIOPORTA_PRIO);
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NVIC_EnableIRQ(GPIOPortA_IRQn);
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}
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//............................................................................
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void QF::onCleanup(void) {
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}
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//............................................................................
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void QF::onIdle(void) { // entered with interrupts LOCKED, see NOTE01
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// toggle the User LED on and then off, see NOTE02
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GPIOC->DATA_Bits[USER_LED] = USER_LED; // turn the User LED on
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GPIOC->DATA_Bits[USER_LED] = 0; // turn the User LED off
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#ifdef Q_SPY
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QF_INT_ENABLE();
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if ((UART0->FR & UART_FR_TXFE) != 0) { // TX done?
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uint16_t fifo = UART_TXFIFO_DEPTH; // max bytes we can accept
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uint8_t const *block;
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QF_INT_DISABLE();
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block = QS::getBlock(&fifo); // try to get next block to transmit
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QF_INT_ENABLE();
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while (fifo-- != 0) { // any bytes in the block?
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UART0->DR = *block++; // put into the FIFO
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}
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}
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#elif defined NDEBUG
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// put the CPU and peripherals to the low-power mode
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// you might need to customize the clock management for your application,
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// see the datasheet for your particular Cortex-M3 MCU.
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__WFI(); // Wait-For-Interrupt
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QF_INT_ENABLE();
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#else
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QF_INT_ENABLE();
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#endif
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}
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//............................................................................
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void Q_onAssert(char const Q_ROM * const Q_ROM_VAR file, int line) {
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(void)file; // avoid compiler warning
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(void)line; // avoid compiler warning
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QF_INT_DISABLE(); // make sure that all interrupts are disabled
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for (;;) { // NOTE: replace the loop with reset for final version
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}
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}
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//............................................................................
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// error routine that is called if the CMSIS library encounters an error
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extern "C" void assert_failed(char const *file, int line) {
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Q_onAssert(file, line);
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}
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//----------------------------------------------------------------------------
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#ifdef Q_SPY
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//............................................................................
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bool QS::onStartup(void const *arg) {
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static uint8_t qsBuf[6*256]; // buffer for Quantum Spy
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uint32_t tmp;
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initBuf(qsBuf, sizeof(qsBuf));
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// enable the peripherals used by the UART0
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SYSCTL->RCGC1 |= (1 << 0); // enable clock to UART0
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SYSCTL->RCGC2 |= (1 << 0); // enable clock to GPIOA
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__NOP(); // wait after enabling clocks
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__NOP();
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__NOP();
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// configure UART0 pins for UART operation
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tmp = (1 << 0) | (1 << 1);
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GPIOA->DIR &= ~tmp;
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GPIOA->AFSEL |= tmp;
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GPIOA->DR2R |= tmp; // set 2mA drive, DR4R and DR8R are cleared
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GPIOA->SLR &= ~tmp;
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GPIOA->ODR &= ~tmp;
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GPIOA->PUR &= ~tmp;
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GPIOA->PDR &= ~tmp;
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GPIOA->DEN |= tmp;
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// configure the UART for the desired baud rate, 8-N-1 operation
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tmp = (((SystemFrequency * 8) / UART_BAUD_RATE) + 1) / 2;
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UART0->IBRD = tmp / 64;
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UART0->FBRD = tmp % 64;
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UART0->LCRH = 0x60; // configure 8-N-1 operation
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UART0->LCRH |= 0x10;
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UART0->CTL |= (1 << 0) | (1 << 8) | (1 << 9);
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QS_tickPeriod_ = SystemFrequency / BSP_TICKS_PER_SEC;
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QS_tickTime_ = QS_tickPeriod_; // to start the timestamp at zero
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// setup the QS filters...
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QS_FILTER_ON(QS_ALL_RECORDS);
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// QS_FILTER_OFF(QS_QEP_STATE_EMPTY);
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// QS_FILTER_OFF(QS_QEP_STATE_ENTRY);
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// QS_FILTER_OFF(QS_QEP_STATE_EXIT);
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// QS_FILTER_OFF(QS_QEP_STATE_INIT);
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// QS_FILTER_OFF(QS_QEP_INIT_TRAN);
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// QS_FILTER_OFF(QS_QEP_INTERN_TRAN);
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// QS_FILTER_OFF(QS_QEP_TRAN);
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// QS_FILTER_OFF(QS_QEP_IGNORED);
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QS_FILTER_OFF(QS_QF_ACTIVE_ADD);
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QS_FILTER_OFF(QS_QF_ACTIVE_REMOVE);
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QS_FILTER_OFF(QS_QF_ACTIVE_SUBSCRIBE);
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QS_FILTER_OFF(QS_QF_ACTIVE_UNSUBSCRIBE);
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QS_FILTER_OFF(QS_QF_ACTIVE_POST_FIFO);
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QS_FILTER_OFF(QS_QF_ACTIVE_POST_LIFO);
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QS_FILTER_OFF(QS_QF_ACTIVE_GET);
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QS_FILTER_OFF(QS_QF_ACTIVE_GET_LAST);
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QS_FILTER_OFF(QS_QF_EQUEUE_INIT);
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QS_FILTER_OFF(QS_QF_EQUEUE_POST_FIFO);
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QS_FILTER_OFF(QS_QF_EQUEUE_POST_LIFO);
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QS_FILTER_OFF(QS_QF_EQUEUE_GET);
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QS_FILTER_OFF(QS_QF_EQUEUE_GET_LAST);
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QS_FILTER_OFF(QS_QF_MPOOL_INIT);
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QS_FILTER_OFF(QS_QF_MPOOL_GET);
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QS_FILTER_OFF(QS_QF_MPOOL_PUT);
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QS_FILTER_OFF(QS_QF_PUBLISH);
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QS_FILTER_OFF(QS_QF_NEW);
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QS_FILTER_OFF(QS_QF_GC_ATTEMPT);
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QS_FILTER_OFF(QS_QF_GC);
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// QS_FILTER_OFF(QS_QF_TICK);
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QS_FILTER_OFF(QS_QF_TIMEEVT_ARM);
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QS_FILTER_OFF(QS_QF_TIMEEVT_AUTO_DISARM);
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QS_FILTER_OFF(QS_QF_TIMEEVT_DISARM_ATTEMPT);
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QS_FILTER_OFF(QS_QF_TIMEEVT_DISARM);
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QS_FILTER_OFF(QS_QF_TIMEEVT_REARM);
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QS_FILTER_OFF(QS_QF_TIMEEVT_POST);
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QS_FILTER_OFF(QS_QF_CRIT_ENTRY);
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QS_FILTER_OFF(QS_QF_CRIT_EXIT);
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QS_FILTER_OFF(QS_QF_ISR_ENTRY);
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QS_FILTER_OFF(QS_QF_ISR_EXIT);
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return true; // return success
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}
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//............................................................................
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void QS::onCleanup(void) {
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}
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//............................................................................
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QSTimeCtr QS::onGetTime(void) { // invoked with interrupts locked
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if ((SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) == 0) { // flag not set?
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return QS_tickTime_ - (QSTimeCtr)SysTick->VAL;
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}
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else { // the rollover occured, but the SysTick_ISR did not run yet
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return QS_tickTime_ + QS_tickPeriod_ - (QSTimeCtr)SysTick->VAL;
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}
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}
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//............................................................................
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void QS::onFlush(void) {
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uint16_t fifo = UART_TXFIFO_DEPTH; // Tx FIFO depth
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uint8_t const *block;
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while ((block = QS::getBlock(&fifo)) != (uint8_t *)0) {
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// busy-wait until TX FIFO empty
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while ((UART0->FR & UART_FR_TXFE) == 0) {
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}
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while (fifo-- != 0) { // any bytes in the block?
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UART0->DR = *block++; // put into the TX FIFO
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}
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fifo = UART_TXFIFO_DEPTH; // re-load the Tx FIFO depth
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}
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}
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#endif // Q_SPY
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//----------------------------------------------------------------------------
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//////////////////////////////////////////////////////////////////////////////
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// NOTE01:
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// The QF_onIdle() callback is called with interrupts locked, because the
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// determination of the idle condition might change by any interrupt posting
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// an event. QF::onIdle() must internally unlock interrupts, ideally
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// atomically with putting the CPU to the power-saving mode.
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//
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// NOTE02:
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// The User LED is used to visualize the idle loop activity. The brightness
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// of the LED is proportional to the frequency of invcations of the idle loop.
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// Please note that the LED is toggled with interrupts locked, so no interrupt
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// execution time contributes to the brightness of the User LED.
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//
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