diff options
| author | joshua <joshua@joshuayun.com> | 2023-12-30 23:54:31 -0500 |
|---|---|---|
| committer | joshua <joshua@joshuayun.com> | 2023-12-30 23:54:31 -0500 |
| commit | 86608c6770cf08c138a2bdab5855072f64be09ef (patch) | |
| tree | 494a61b3ef37e76f9235a0d10f5c93d97290a35f /Drivers/CMSIS/RTOS2/Source/os_tick_ptim.c | |
| download | sdr-software-master.tar.gz | |
Diffstat (limited to 'Drivers/CMSIS/RTOS2/Source/os_tick_ptim.c')
| -rw-r--r-- | Drivers/CMSIS/RTOS2/Source/os_tick_ptim.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/Drivers/CMSIS/RTOS2/Source/os_tick_ptim.c b/Drivers/CMSIS/RTOS2/Source/os_tick_ptim.c new file mode 100644 index 0000000..ccd9cb6 --- /dev/null +++ b/Drivers/CMSIS/RTOS2/Source/os_tick_ptim.c @@ -0,0 +1,165 @@ +/**************************************************************************//**
+ * @file os_tick_ptim.c
+ * @brief CMSIS OS Tick implementation for Private Timer
+ * @version V1.0.2
+ * @date 02. March 2018
+ ******************************************************************************/
+/*
+ * Copyright (c) 2017-2018 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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
+ *
+ * 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.
+ */
+
+#include "RTE_Components.h"
+#include CMSIS_device_header
+
+#if defined(PTIM)
+
+#include "os_tick.h"
+#include "irq_ctrl.h"
+
+#ifndef PTIM_IRQ_PRIORITY
+#define PTIM_IRQ_PRIORITY 0xFFU
+#endif
+
+static uint8_t PTIM_PendIRQ; // Timer interrupt pending flag
+
+// Setup OS Tick.
+int32_t OS_Tick_Setup (uint32_t freq, IRQHandler_t handler) {
+ uint32_t load;
+ uint32_t prio;
+ uint32_t bits;
+
+ if (freq == 0U) {
+ return (-1);
+ }
+
+ PTIM_PendIRQ = 0U;
+
+ // Private Timer runs with the system frequency
+ load = (SystemCoreClock / freq) - 1U;
+
+ // Disable Private Timer and set load value
+ PTIM_SetControl (0U);
+ PTIM_SetLoadValue (load);
+
+ // Disable corresponding IRQ
+ IRQ_Disable (PrivTimer_IRQn);
+ IRQ_ClearPending(PrivTimer_IRQn);
+
+ // Determine number of implemented priority bits
+ IRQ_SetPriority (PrivTimer_IRQn, 0xFFU);
+
+ prio = IRQ_GetPriority (PrivTimer_IRQn);
+
+ // At least bits [7:4] must be implemented
+ if ((prio & 0xF0U) == 0U) {
+ return (-1);
+ }
+
+ for (bits = 0; bits < 4; bits++) {
+ if ((prio & 0x01) != 0) {
+ break;
+ }
+ prio >>= 1;
+ }
+
+ // Adjust configured priority to the number of implemented priority bits
+ prio = (PTIM_IRQ_PRIORITY << bits) & 0xFFUL;
+
+ // Set Private Timer interrupt priority
+ IRQ_SetPriority(PrivTimer_IRQn, prio-1U);
+
+ // Set edge-triggered IRQ
+ IRQ_SetMode(PrivTimer_IRQn, IRQ_MODE_TRIG_EDGE);
+
+ // Register tick interrupt handler function
+ IRQ_SetHandler(PrivTimer_IRQn, handler);
+
+ // Enable corresponding interrupt
+ IRQ_Enable (PrivTimer_IRQn);
+
+ // Set bits: IRQ enable and Auto reload
+ PTIM_SetControl (0x06U);
+
+ return (0);
+}
+
+/// Enable OS Tick.
+void OS_Tick_Enable (void) {
+ uint32_t ctrl;
+
+ // Set pending interrupt if flag set
+ if (PTIM_PendIRQ != 0U) {
+ PTIM_PendIRQ = 0U;
+ IRQ_SetPending (PrivTimer_IRQn);
+ }
+
+ // Start the Private Timer
+ ctrl = PTIM_GetControl();
+ // Set bit: Timer enable
+ ctrl |= 1U;
+ PTIM_SetControl (ctrl);
+}
+
+/// Disable OS Tick.
+void OS_Tick_Disable (void) {
+ uint32_t ctrl;
+
+ // Stop the Private Timer
+ ctrl = PTIM_GetControl();
+ // Clear bit: Timer enable
+ ctrl &= ~1U;
+ PTIM_SetControl (ctrl);
+
+ // Remember pending interrupt flag
+ if (IRQ_GetPending(PrivTimer_IRQn) != 0) {
+ IRQ_ClearPending (PrivTimer_IRQn);
+ PTIM_PendIRQ = 1U;
+ }
+}
+
+// Acknowledge OS Tick IRQ.
+void OS_Tick_AcknowledgeIRQ (void) {
+ PTIM_ClearEventFlag();
+}
+
+// Get OS Tick IRQ number.
+int32_t OS_Tick_GetIRQn (void) {
+ return (PrivTimer_IRQn);
+}
+
+// Get OS Tick clock.
+uint32_t OS_Tick_GetClock (void) {
+ return (SystemCoreClock);
+}
+
+// Get OS Tick interval.
+uint32_t OS_Tick_GetInterval (void) {
+ return (PTIM_GetLoadValue() + 1U);
+}
+
+// Get OS Tick count value.
+uint32_t OS_Tick_GetCount (void) {
+ uint32_t load = PTIM_GetLoadValue();
+ return (load - PTIM_GetCurrentValue());
+}
+
+// Get OS Tick overflow status.
+uint32_t OS_Tick_GetOverflow (void) {
+ return (PTIM->ISR & 1);
+}
+
+#endif // PTIM
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