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authorYuval Adam <yuv.adm@gmail.com>2014-06-29 12:34:32 +0300
committerYuval Adam <yuv.adm@gmail.com>2014-06-29 12:34:32 +0300
commitc3e4c9a25c2910d2d66d52215b3406b13d5b23d5 (patch)
treeadded370d1e356901f8579f076e3263fb0464db7 /boards/dk-tm4c129x/interrupts/interrupts.c
parent990090a4cc9070837d31e66b58d40f0c3d038741 (diff)
Add more board models
Diffstat (limited to 'boards/dk-tm4c129x/interrupts/interrupts.c')
-rw-r--r--boards/dk-tm4c129x/interrupts/interrupts.c593
1 files changed, 593 insertions, 0 deletions
diff --git a/boards/dk-tm4c129x/interrupts/interrupts.c b/boards/dk-tm4c129x/interrupts/interrupts.c
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+//*****************************************************************************
+//
+// interrupts.c - Interrupt preemption and tail-chaining example.
+//
+// Copyright (c) 2013-2014 Texas Instruments Incorporated. All rights reserved.
+// Software License Agreement
+//
+// Texas Instruments (TI) is supplying this software for use solely and
+// exclusively on TI's microcontroller products. The software is owned by
+// TI and/or its suppliers, and is protected under applicable copyright
+// laws. You may not combine this software with "viral" open-source
+// software in order to form a larger program.
+//
+// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
+// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
+// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
+// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
+// DAMAGES, FOR ANY REASON WHATSOEVER.
+//
+// This is part of revision 2.1.0.12573 of the DK-TM4C129X Firmware Package.
+//
+//*****************************************************************************
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "inc/hw_ints.h"
+#include "inc/hw_memmap.h"
+#include "inc/hw_nvic.h"
+#include "inc/hw_types.h"
+#include "driverlib/gpio.h"
+#include "driverlib/interrupt.h"
+#include "driverlib/systick.h"
+#include "driverlib/sysctl.h"
+#include "driverlib/rom.h"
+#include "driverlib/rom_map.h"
+#include "grlib/grlib.h"
+#include "drivers/frame.h"
+#include "drivers/kentec320x240x16_ssd2119.h"
+#include "drivers/pinout.h"
+
+//*****************************************************************************
+//
+//! \addtogroup example_list
+//! <h1>Interrupts (interrupts)</h1>
+//!
+//! This example application demonstrates the interrupt preemption and
+//! tail-chaining capabilities of Cortex-M4 microprocessor and NVIC. Nested
+//! interrupts are synthesized when the interrupts have the same priority,
+//! increasing priorities, and decreasing priorities. With increasing
+//! priorities, preemption will occur; in the other two cases tail-chaining
+//! will occur. The currently pending interrupts and the currently executing
+//! interrupt will be displayed on the display; GPIO pins B3, L1 and L0 (the
+//! GPIO on jumper J27 on the left edge of the board) will be asserted upon
+//! interrupt handler entry and de-asserted before interrupt handler exit so
+//! that the off-to-on time can be observed with a scope or logic analyzer to
+//! see the speed of tail-chaining (for the two cases where tail-chaining is
+//! occurring).
+//
+//*****************************************************************************
+
+
+//*****************************************************************************
+//
+// The count of interrupts received. This is incremented as each interrupt
+// handler runs, and its value saved into interrupt handler specific values to
+// determine the order in which the interrupt handlers were executed.
+//
+//*****************************************************************************
+volatile uint32_t g_ui32Index;
+
+//*****************************************************************************
+//
+// The value of g_ui32Index when the INT_GPIOA interrupt was processed.
+//
+//*****************************************************************************
+volatile uint32_t g_ui32GPIOa;
+
+//*****************************************************************************
+//
+// The value of g_ui32Index when the INT_GPIOB interrupt was processed.
+//
+//*****************************************************************************
+volatile uint32_t g_ui32GPIOb;
+
+//*****************************************************************************
+//
+// The value of g_ui32Index when the INT_GPIOC interrupt was processed.
+//
+//*****************************************************************************
+volatile uint32_t g_ui32GPIOc;
+
+//*****************************************************************************
+//
+// Graphics context used to show text on the display.
+//
+//*****************************************************************************
+tContext g_sContext;
+
+//*****************************************************************************
+//
+// GPIOs that are used for this example.
+//
+//*****************************************************************************
+#define GPIO_A_BASE GPIO_PORTB_BASE
+#define GPIO_A_PIN GPIO_PIN_3
+#define GPIO_B_BASE GPIO_PORTL_BASE
+#define GPIO_B_PIN GPIO_PIN_1
+#define GPIO_C_BASE GPIO_PORTL_BASE
+#define GPIO_C_PIN GPIO_PIN_0
+
+//*****************************************************************************
+//
+// The error routine that is called if the driver library encounters an error.
+//
+//*****************************************************************************
+#ifdef DEBUG
+void
+__error__(char *pcFilename, uint32_t ui32Line)
+{
+}
+#endif
+
+//*****************************************************************************
+//
+// Delay for the specified number of seconds. Depending upon the current
+// SysTick value, the delay will be between N-1 and N seconds (i.e. N-1 full
+// seconds are guaranteed, along with the remainder of the current second).
+//
+//*****************************************************************************
+void
+Delay(uint32_t ui32Seconds)
+{
+ uint8_t ui8Loop;
+
+ //
+ // Loop while there are more seconds to wait.
+ //
+ while(ui32Seconds--)
+ {
+ for(ui8Loop = 0; ui8Loop < 100; ui8Loop++)
+ {
+ //
+ // Wait until the SysTick value is less than 1000.
+ //
+ while(ROM_SysTickValueGet() > 1000)
+ {
+ }
+
+ //
+ // Wait until the SysTick value is greater than 1000.
+ //
+ while(ROM_SysTickValueGet() < 1000)
+ {
+ }
+ }
+ }
+}
+
+//*****************************************************************************
+//
+// Display the interrupt state on the display. The currently active and pending
+// interrupts are displayed.
+//
+//*****************************************************************************
+void
+DisplayIntStatus(void)
+{
+ uint32_t ui32Temp;
+ char pcBuffer[6];
+
+ //
+ // Display the currently active interrupts.
+ //
+ ui32Temp = HWREG(NVIC_ACTIVE0);
+ pcBuffer[0] = ' ';
+ pcBuffer[1] = (ui32Temp & 1) ? '1' : ' ';
+ pcBuffer[2] = (ui32Temp & 2) ? '2' : ' ';
+ pcBuffer[3] = (ui32Temp & 4) ? '3' : ' ';
+ pcBuffer[4] = ' ';
+ pcBuffer[5] = '\0';
+ GrStringDrawCentered(&g_sContext, pcBuffer, -1, 130, 150, 1);
+
+ //
+ // Display the currently pending interrupts.
+ //
+ ui32Temp = HWREG(NVIC_PEND0);
+ pcBuffer[1] = (ui32Temp & 1) ? '1' : ' ';
+ pcBuffer[2] = (ui32Temp & 2) ? '2' : ' ';
+ pcBuffer[3] = (ui32Temp & 4) ? '3' : ' ';
+ GrStringDrawCentered(&g_sContext, pcBuffer, -1, 270, 150, 1);
+
+ //
+ // Flush the display.
+ //
+ GrFlush(&g_sContext);
+}
+
+//*****************************************************************************
+//
+// This is the handler for INT_GPIOA. It simply saves the interrupt sequence
+// number.
+//
+//*****************************************************************************
+void
+IntGPIOa(void)
+{
+ //
+ // Set GPIO high to indicate entry to this interrupt handler.
+ //
+ ROM_GPIOPinWrite(GPIO_A_BASE, GPIO_A_PIN, GPIO_A_PIN);
+
+ //
+ // Put the current interrupt state on the display.
+ //
+ DisplayIntStatus();
+
+ //
+ // Wait two seconds.
+ //
+ Delay(2);
+
+ //
+ // Save and increment the interrupt sequence number.
+ //
+ g_ui32GPIOa = g_ui32Index++;
+
+ //
+ // Set GPIO low to indicate exit from this interrupt handler.
+ //
+ ROM_GPIOPinWrite(GPIO_A_BASE, GPIO_A_PIN, 0);
+}
+
+//*****************************************************************************
+//
+// This is the handler for INT_GPIOB. It triggers INT_GPIOA and saves the
+// interrupt sequence number.
+//
+//*****************************************************************************
+void
+IntGPIOb(void)
+{
+ //
+ // Set GPIO high to indicate entry to this interrupt handler.
+ //
+ ROM_GPIOPinWrite(GPIO_B_BASE, GPIO_B_PIN, GPIO_B_PIN);
+
+ //
+ // Put the current interrupt state on the display.
+ //
+ DisplayIntStatus();
+
+ //
+ // Trigger the INT_GPIOA interrupt.
+ //
+ HWREG(NVIC_SW_TRIG) = INT_GPIOA - 16;
+
+ //
+ // Put the current interrupt state on the display.
+ //
+ DisplayIntStatus();
+
+ //
+ // Wait two seconds.
+ //
+ Delay(2);
+
+ //
+ // Save and increment the interrupt sequence number.
+ //
+ g_ui32GPIOb = g_ui32Index++;
+
+ //
+ // Set GPIO low to indicate exit from this interrupt handler.
+ //
+ ROM_GPIOPinWrite(GPIO_B_BASE, GPIO_B_PIN, 0);
+}
+
+//*****************************************************************************
+//
+// This is the handler for INT_GPIOC. It triggers INT_GPIOB and saves the
+// interrupt sequence number.
+//
+//*****************************************************************************
+void
+IntGPIOc(void)
+{
+ //
+ // Set GPIO high to indicate entry to this interrupt handler.
+ //
+ ROM_GPIOPinWrite(GPIO_C_BASE, GPIO_C_PIN, GPIO_C_PIN);
+
+ //
+ // Put the current interrupt state on the display.
+ //
+ DisplayIntStatus();
+
+ //
+ // Trigger the INT_GPIOB interrupt.
+ //
+ HWREG(NVIC_SW_TRIG) = INT_GPIOB - 16;
+
+ //
+ // Put the current interrupt state on the display.
+ //
+ DisplayIntStatus();
+
+ //
+ // Wait two seconds.
+ //
+ Delay(2);
+
+ //
+ // Save and increment the interrupt sequence number.
+ //
+ g_ui32GPIOc = g_ui32Index++;
+
+ //
+ // Set GPIO low to indicate exit from this interrupt handler.
+ //
+ ROM_GPIOPinWrite(GPIO_C_BASE, GPIO_C_PIN, 0);
+}
+
+//*****************************************************************************
+//
+// This is the main example program. It checks to see that the interrupts are
+// processed in the correct order when they have identical priorities,
+// increasing priorities, and decreasing priorities. This exercises interrupt
+// preemption and tail chaining.
+//
+//*****************************************************************************
+int
+main(void)
+{
+ uint_fast8_t ui8Error;
+ uint32_t ui32SysClock;
+
+ //
+ // Run from the PLL at 120 MHz.
+ //
+ ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
+ SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
+ SYSCTL_CFG_VCO_480), 120000000);
+
+ //
+ // Configure the device pins.
+ //
+ PinoutSet();
+
+ //
+ // Initialize the display driver.
+ //
+ Kentec320x240x16_SSD2119Init(ui32SysClock);
+
+ //
+ // Initialize the graphics context.
+ //
+ GrContextInit(&g_sContext, &g_sKentec320x240x16_SSD2119);
+
+ //
+ // Draw the application frame.
+ //
+ FrameDraw(&g_sContext, "interrupts");
+
+ //
+ // Put the status header text on the display.
+ //
+ GrContextFontSet(&g_sContext, g_psFontCm20);
+ GrStringDrawCentered(&g_sContext, "Active: Pending: ", -1,
+ GrContextDpyWidthGet(&g_sContext) / 2, 150, 0);
+
+ //
+ // Configure the B3, L1 and L0 to be outputs to indicate entry/exit of one
+ // of the interrupt handlers.
+ //
+ GPIOPinTypeGPIOOutput(GPIO_A_BASE, GPIO_A_PIN);
+ GPIOPinTypeGPIOOutput(GPIO_B_BASE, GPIO_B_PIN);
+ GPIOPinTypeGPIOOutput(GPIO_C_BASE, GPIO_C_PIN);
+ GPIOPinWrite(GPIO_A_BASE, GPIO_A_PIN, 0);
+ GPIOPinWrite(GPIO_B_BASE, GPIO_B_PIN, 0);
+ GPIOPinWrite(GPIO_C_BASE, GPIO_C_PIN, 0);
+
+ //
+ // Set up and enable the SysTick timer. It will be used as a reference
+ // for delay loops in the interrupt handlers. The SysTick timer period
+ // will be set up for 100 times per second.
+ //
+ ROM_SysTickPeriodSet(ui32SysClock / 100);
+ ROM_SysTickEnable();
+
+ //
+ // Reset the error indicator.
+ //
+ ui8Error = 0;
+
+ //
+ // Enable interrupts to the processor.
+ //
+ ROM_IntMasterEnable();
+
+ //
+ // Enable the interrupts.
+ //
+ ROM_IntEnable(INT_GPIOA);
+ ROM_IntEnable(INT_GPIOB);
+ ROM_IntEnable(INT_GPIOC);
+
+ //
+ // Indicate that the equal interrupt priority test is beginning.
+ //
+ GrStringDrawCentered(&g_sContext, "Equal Priority", -1,
+ GrContextDpyWidthGet(&g_sContext) / 2, 60, 1);
+
+ //
+ // Set the interrupt priorities so they are all equal.
+ //
+ ROM_IntPrioritySet(INT_GPIOA, 0x00);
+ ROM_IntPrioritySet(INT_GPIOB, 0x00);
+ ROM_IntPrioritySet(INT_GPIOC, 0x00);
+
+ //
+ // Reset the interrupt flags.
+ //
+ g_ui32GPIOa = 0;
+ g_ui32GPIOb = 0;
+ g_ui32GPIOc = 0;
+ g_ui32Index = 1;
+
+ //
+ // Trigger the interrupt for GPIO C.
+ //
+ HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
+
+ //
+ // Put the current interrupt state on the LCD.
+ //
+ DisplayIntStatus();
+
+ //
+ // Verify that the interrupts were processed in the correct order.
+ //
+ if((g_ui32GPIOa != 3) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 1))
+ {
+ ui8Error |= 1;
+ }
+
+ //
+ // Wait two seconds.
+ //
+ Delay(2);
+
+ //
+ // Indicate that the decreasing interrupt priority test is beginning.
+ //
+ GrStringDrawCentered(&g_sContext, " Decreasing Priority ", -1,
+ GrContextDpyWidthGet(&g_sContext) / 2, 60, 1);
+
+ //
+ // Set the interrupt priorities so that they are decreasing (i.e. C > B >
+ // A).
+ //
+ ROM_IntPrioritySet(INT_GPIOA, 0x80);
+ ROM_IntPrioritySet(INT_GPIOB, 0x40);
+ ROM_IntPrioritySet(INT_GPIOC, 0x00);
+
+ //
+ // Reset the interrupt flags.
+ //
+ g_ui32GPIOa = 0;
+ g_ui32GPIOb = 0;
+ g_ui32GPIOc = 0;
+ g_ui32Index = 1;
+
+ //
+ // Trigger the interrupt for GPIO C.
+ //
+ HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
+
+ //
+ // Put the current interrupt state on the display.
+ //
+ DisplayIntStatus();
+
+ //
+ // Verify that the interrupts were processed in the correct order.
+ //
+ if((g_ui32GPIOa != 3) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 1))
+ {
+ ui8Error |= 2;
+ }
+
+ //
+ // Wait two seconds.
+ //
+ Delay(2);
+
+ //
+ // Indicate that the increasing interrupt priority test is beginning.
+ //
+ GrStringDrawCentered(&g_sContext, " Increasing Priority ", -1,
+ GrContextDpyWidthGet(&g_sContext) / 2, 60, 1);
+
+ //
+ // Set the interrupt priorities so that they are increasing (i.e. C < B <
+ // A).
+ //
+ ROM_IntPrioritySet(INT_GPIOA, 0x00);
+ ROM_IntPrioritySet(INT_GPIOB, 0x40);
+ ROM_IntPrioritySet(INT_GPIOC, 0x80);
+
+ //
+ // Reset the interrupt flags.
+ //
+ g_ui32GPIOa = 0;
+ g_ui32GPIOb = 0;
+ g_ui32GPIOc = 0;
+ g_ui32Index = 1;
+
+ //
+ // Trigger the interrupt for GPIO C.
+ //
+ HWREG(NVIC_SW_TRIG) = INT_GPIOC - 16;
+
+ //
+ // Put the current interrupt state on the display.
+ //
+ DisplayIntStatus();
+
+ //
+ // Verify that the interrupts were processed in the correct order.
+ //
+ if((g_ui32GPIOa != 1) || (g_ui32GPIOb != 2) || (g_ui32GPIOc != 3))
+ {
+ ui8Error |= 4;
+ }
+
+ //
+ // Wait two seconds.
+ //
+ Delay(2);
+
+ //
+ // Disable the interrupts.
+ //
+ ROM_IntDisable(INT_GPIOA);
+ ROM_IntDisable(INT_GPIOB);
+ ROM_IntDisable(INT_GPIOC);
+
+ //
+ // Disable interrupts to the processor.
+ //
+ ROM_IntMasterDisable();
+
+ //
+ // Print out the test results.
+ //
+ GrStringDrawCentered(&g_sContext, " Interrupt Priority ", -1,
+ GrContextDpyWidthGet(&g_sContext) / 2, 60, 1);
+ if(ui8Error)
+ {
+ GrStringDrawCentered(&g_sContext, " Equal: P Inc: P Dec: P ",
+ -1, GrContextDpyWidthGet(&g_sContext) / 2, 150, 1);
+ if(ui8Error & 1)
+ {
+ GrStringDrawCentered(&g_sContext, " F ", -1, 113, 150, 1);
+ }
+ if(ui8Error & 2)
+ {
+ GrStringDrawCentered(&g_sContext, " F ", -1, 187, 150, 1);
+ }
+ if(ui8Error & 4)
+ {
+ GrStringDrawCentered(&g_sContext, " F ", -1, 272, 150, 1);
+ }
+ }
+ else
+ {
+ GrStringDrawCentered(&g_sContext, " Success! ", -1,
+ GrContextDpyWidthGet(&g_sContext) / 2, 150, 1);
+ }
+
+ //
+ // Flush the display.
+ //
+ GrFlush(&g_sContext);
+
+ //
+ // Loop forever.
+ //
+ while(1)
+ {
+ }
+}