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110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
/* Board Support Package (BSP) for the EK-TM4C123GXL board */
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#include <stdint.h> /* Standard integers. WG14/N843 C99 Standard */
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#include "bsp.h"
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#include "TM4C123GH6PM.h" /* the TM4C MCU Peripheral Access Layer (TI) */
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/* on-board LEDs */
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#define LED_RED (1U << 1)
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#define LED_BLUE (1U << 2)
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#define LED_GREEN (1U << 3)
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/* Buttons on the board */
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#define BTN_SW1 (1U << 4)
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static uint32_t volatile l_tickCtr;
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void SysTick_Handler(void) {
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++l_tickCtr;
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}
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void BSP_init(void) {
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SYSCTL->RCGCGPIO |= (1U << 5); /* enable Run Mode for GPIOF */
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SYSCTL->GPIOHBCTL |= (1U << 5); /* enable AHB for GPIOF */
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/* make sure the Run Mode and AHB-enable take effects
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* before accessing the peripherals
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*/
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__ISB(); /* Instruction Synchronization Barrier */
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__DSB(); /* Data Memory Barrier */
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GPIOF_AHB->DIR |= (LED_RED | LED_BLUE | LED_GREEN);
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GPIOF_AHB->DEN |= (LED_RED | LED_BLUE | LED_GREEN);
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/* configure switch SW1 */
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GPIOF_AHB->DIR &= ~BTN_SW1; /* input */
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GPIOF_AHB->DEN |= BTN_SW1; /* digital enable */
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GPIOF_AHB->PUR |= BTN_SW1; /* pull-up resistor enable */
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SystemCoreClockUpdate();
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SysTick_Config(SystemCoreClock / BSP_TICKS_PER_SEC);
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__enable_irq();
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}
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uint32_t BSP_tickCtr(void) {
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uint32_t tickCtr;
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__disable_irq();
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tickCtr = l_tickCtr;
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__enable_irq();
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return tickCtr;
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}
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uint8_t BSP_SW1(void) {
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uint32_t sw1;
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__disable_irq();
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sw1 = GPIOF_AHB->DATA_Bits[BTN_SW1];
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__enable_irq();
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return (sw1 != 0U) ? 1U : 0U;
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}
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void BSP_delay(uint32_t ticks) {
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uint32_t start = BSP_tickCtr();
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while ((BSP_tickCtr() - start) < ticks) {
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}
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}
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void BSP_ledRedOn(void) {
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GPIOF_AHB->DATA_Bits[LED_RED] = LED_RED;
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}
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void BSP_ledRedOff(void) {
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GPIOF_AHB->DATA_Bits[LED_RED] = 0U;
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}
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void BSP_ledBlueOn(void) {
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GPIOF_AHB->DATA_Bits[LED_BLUE] = LED_BLUE;
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}
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void BSP_ledBlueOff(void) {
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GPIOF_AHB->DATA_Bits[LED_BLUE] = 0U;
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}
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void BSP_ledGreenOn(void) {
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GPIOF_AHB->DATA_Bits[LED_GREEN] = LED_GREEN;
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}
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void BSP_ledGreenOff(void) {
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GPIOF_AHB->DATA_Bits[LED_GREEN] = 0U;
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}
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//............................................................................
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_Noreturn void assert_failed(char const * const module, int const id);
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_Noreturn void assert_failed(char const * const module, int const id) {
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(void)module; // unused parameter
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(void)id; // unused parameter
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#ifndef NDEBUG
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// light up all LEDs
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GPIOF_AHB->DATA_Bits[LED_GREEN | LED_RED | LED_BLUE] = 0xFFU;
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// for debugging, hang on in an endless loop...
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for (;;) {
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}
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#endif
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NVIC_SystemReset();
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}
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