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Diffstat (limited to 'os/hal/ports/TIVA/LLD/GPTM/hal_st_lld.c')
-rw-r--r--os/hal/ports/TIVA/LLD/GPTM/hal_st_lld.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/os/hal/ports/TIVA/LLD/GPTM/hal_st_lld.c b/os/hal/ports/TIVA/LLD/GPTM/hal_st_lld.c
new file mode 100644
index 0000000..0f9576a
--- /dev/null
+++ b/os/hal/ports/TIVA/LLD/GPTM/hal_st_lld.c
@@ -0,0 +1,255 @@
+/*
+ Copyright (C) 2014..2017 Marco Veeneman
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file GPTM/hal_st_lld.c
+ * @brief ST Driver subsystem low level driver code.
+ *
+ * @addtogroup ST
+ * @{
+ */
+
+#include "hal.h"
+
+#if (OSAL_ST_MODE != OSAL_ST_MODE_NONE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+#if OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING
+
+#if (TIVA_ST_USE_WIDE_TIMER == TRUE)
+
+#if TIVA_ST_TIMER_NUMBER == 0
+#define ST_HANDLER TIVA_WGPT0A_HANDLER
+#define ST_NUMBER TIVA_WGPT0A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCWTIMER) |= (1 << 0))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRWTIMER) & (1 << 0)))
+
+#elif TIVA_ST_TIMER_NUMBER == 1
+#define ST_HANDLER TIVA_WGPT1A_HANDLER
+#define ST_NUMBER TIVA_WGPT1A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCWTIMER) |= (1 << 1))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRWTIMER) & (1 << 1)))
+
+#elif TIVA_ST_TIMER_NUMBER == 2
+#define ST_HANDLER TIVA_WGPT2A_HANDLER
+#define ST_NUMBER TIVA_WGPT2A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCWTIMER) |= (1 << 2))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRWTIMER) & (1 << 2)))
+
+#elif TIVA_ST_TIMER_NUMBER == 3
+#define ST_HANDLER TIVA_WGPT3A_HANDLER
+#define ST_NUMBER TIVA_WGPT3A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCWTIMER) |= (1 << 3))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRWTIMER) & (1 << 3)))
+
+#elif TIVA_ST_TIMER_NUMBER == 4
+#define ST_HANDLER TIVA_WGPT4A_HANDLER
+#define ST_NUMBER TIVA_WGPT4A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCWTIMER) |= (1 << 4))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRWTIMER) & (1 << 4)))
+
+#elif TIVA_ST_TIMER_NUMBER == 5
+#define ST_HANDLER TIVA_WGPT5A_HANDLER
+#define ST_NUMBER TIVA_WGPT5A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCWTIMER) |= (1 << 5))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRWTIMER) & (1 << 5)))
+
+#else
+#error "TIVA_ST_USE_TIMER specifies an unsupported timer"
+#endif
+
+#if (TIVA_SYSCLK / OSAL_ST_FREQUENCY) - 1 > 0xFFFF
+#error "the selected ST frequency is not obtainable because TIM timer prescaler limits"
+#endif
+
+#elif (TIVA_ST_USE_WIDE_TIMER == FALSE)
+
+#if TIVA_ST_TIMER_NUMBER == 0
+#define ST_HANDLER TIVA_GPT0A_HANDLER
+#define ST_NUMBER TIVA_GPT0A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCTIMER) |= (1 << 0))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRTIMER) & (1 << 0)))
+
+#elif TIVA_ST_TIMER_NUMBER == 1
+#define ST_HANDLER TIVA_GPT1A_HANDLER
+#define ST_NUMBER TIVA_GPT1A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCTIMER) |= (1 << 1))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRTIMER) & (1 << 1)))
+
+#elif TIVA_ST_TIMER_NUMBER == 2
+#define ST_HANDLER TIVA_GPT2A_HANDLER
+#define ST_NUMBER TIVA_GPT2A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCTIMER) |= (1 << 2))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRTIMER) & (1 << 2)))
+
+#elif TIVA_ST_TIMER_NUMBER == 3
+#define ST_HANDLER TIVA_GPT3A_HANDLER
+#define ST_NUMBER TIVA_GPT3A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCTIMER) |= (1 << 3))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRTIMER) & (1 << 3)))
+
+#elif TIVA_ST_TIMER_NUMBER == 4
+#define ST_HANDLER TIVA_GPT4A_HANDLER
+#define ST_NUMBER TIVA_GPT4A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCTIMER) |= (1 << 4))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRTIMER) & (1 << 4)))
+
+#elif TIVA_ST_TIMER_NUMBER == 5
+#define ST_HANDLER TIVA_GPT5A_HANDLER
+#define ST_NUMBER TIVA_GPT5A_NUMBER
+#define ST_ENABLE_CLOCK() (HWREG(SYSCTL_RCGCTIMER) |= (1 << 5))
+#define ST_WAIT_CLOCK() while (!(HWREG(SYSCTL_PRTIMER) & (1 << 5)))
+
+#else
+#error "TIVA_ST_USE_TIMER specifies an unsupported timer"
+#endif
+
+#if (TIVA_SYSCLK / OSAL_ST_FREQUENCY) - 1 > 0xFF
+#error "the selected ST frequency is not obtainable because TIM timer prescaler limits"
+#endif
+
+#endif
+
+#if TIVA_SYSCLK % OSAL_ST_FREQUENCY != 0
+#error "the selected ST frequency is not obtainable because integer rounding"
+#endif
+
+#endif
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+#if (OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC) || defined(__DOXYGEN__)
+/**
+ * @brief System Timer vector.
+ * @details This interrupt is used for system tick in periodic mode.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(SysTick_Handler)
+{
+ OSAL_IRQ_PROLOGUE();
+
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC */
+
+#if (OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING) || defined(__DOXYGEN__)
+/**
+ * @brief GPT interrupt handler.
+ * @details This interrupt is used for system tick in free running mode.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(ST_HANDLER)
+{
+ uint32_t mis;
+
+ OSAL_IRQ_PROLOGUE();
+
+ mis = HWREG(TIVA_ST_TIM + TIMER_O_MIS);
+ HWREG(TIVA_ST_TIM + TIMER_O_ICR) = mis;
+
+ if (mis & TIMER_IMR_TAMIM) {
+ osalSysLockFromISR();
+ osalOsTimerHandlerI();
+ osalSysUnlockFromISR();
+ }
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING */
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level ST driver initialization.
+ *
+ * @notapi
+ */
+void st_lld_init(void)
+{
+#if OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING
+ /* Free running counter mode.*/
+
+ /* Enabling timer clock.*/
+ ST_ENABLE_CLOCK();
+
+ /* Wait until timer peripheral is ready */
+ ST_WAIT_CLOCK();
+
+ /* Initializing the counter in free running down mode.*/
+ HWREG(TIVA_ST_TIM + TIMER_O_CTL) = 0;
+ HWREG(TIVA_ST_TIM + TIMER_O_CFG) = TIMER_CFG_16_BIT; /* Timer split mode */
+ HWREG(TIVA_ST_TIM + TIMER_O_TAMR) = (
+ TIMER_TAMR_TAMR_PERIOD | /* Periodic mode */
+ TIMER_TAMR_TAMIE | /* Match interrupt enable */
+ TIMER_TAMR_TASNAPS); /* Snapshot mode */
+
+ HWREG(TIVA_ST_TIM + TIMER_O_TAPR) = (TIVA_SYSCLK / OSAL_ST_FREQUENCY) - 1;
+ HWREG(TIVA_ST_TIM + TIMER_O_CTL) = (
+ TIMER_CTL_TAEN | /* Timer A enable */
+ TIMER_CTL_TASTALL); /* Timer A stall when paused */
+
+ /* IRQ enabled.*/
+ nvicEnableVector(ST_NUMBER, TIVA_ST_IRQ_PRIORITY);
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING */
+
+#if OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC
+ /* Periodic systick mode, the Cortex-Mx internal systick timer is used
+ in this mode.*/
+ SysTick->LOAD = (TIVA_SYSCLK / OSAL_ST_FREQUENCY) - 1;
+ SysTick->VAL = 0;
+ SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk |
+ SysTick_CTRL_ENABLE_Msk |
+ SysTick_CTRL_TICKINT_Msk;
+
+ /* IRQ enabled.*/
+ nvicSetSystemHandlerPriority(HANDLER_SYSTICK, TIVA_ST_IRQ_PRIORITY);
+#endif /* OSAL_ST_MODE == OSAL_ST_MODE_PERIODIC */
+}
+
+#endif /* OSAL_ST_MODE != OSAL_ST_MODE_NONE */
+
+/**
+ * @}
+ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-26 17:13:08 +0000