diff options
Diffstat (limited to 'applications/threadx_demo/tx_initialize_low_level.c')
| -rw-r--r-- | applications/threadx_demo/tx_initialize_low_level.c | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/applications/threadx_demo/tx_initialize_low_level.c b/applications/threadx_demo/tx_initialize_low_level.c deleted file mode 100644 index f709cb2..0000000 --- a/applications/threadx_demo/tx_initialize_low_level.c +++ /dev/null @@ -1,116 +0,0 @@ -/* - * Copyright (c) 2020-2021 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. - */ - -/**************************************************************************** - * Includes - ****************************************************************************/ -#include "tx_api.h" -#include <stdio.h> - -/**************************************************************************** - * Defines - ****************************************************************************/ -#define SYSTEM_CLOCK 6000000 -#define SYSTICK_CYCLES ((SYSTEM_CLOCK / 100) - 1) - -/**************************************************************************** - * Externs - ****************************************************************************/ -void _tx_timer_interrupt(void); - -/**************************************************************************** - * Functions - ****************************************************************************/ - -/**************************************************************************/ -/* */ -/* FUNCTION RELEASE */ -/* */ -/* _tx_initialize_low_level Cortex-M4/GNU */ -/* 6.1 */ -/* */ -/* DESCRIPTION */ -/* */ -/* This function is responsible for any low-level processor */ -/* initialization, including setting up interrupt vectors, setting */ -/* up a periodic timer interrupt source, saving the system stack */ -/* pointer for use in ISR processing later, and finding the first */ -/* available RAM memory address for tx_application_define. */ -/* this function has an empty implementation in this example. */ -/* */ -/* INPUT */ -/* */ -/* None */ -/* */ -/* OUTPUT */ -/* */ -/* None */ -/* */ -/* CALLS */ -/* */ -/* None */ -/* */ -/* CALLED BY */ -/* */ -/* _tx_initialize_kernel_enter ThreadX entry function */ -/* */ -/**************************************************************************/ -VOID _tx_initialize_low_level(VOID) { - __asm__ volatile( - /* Disable interrupts during ThreadX initialization. */ - " CPSID i\n" - /* Enable the cycle count register. */ - " LDR r0, =0xE0001000\n" // Build address of DWT register - " LDR r1, [r0]\n" // Pickup the current value - " ORR r1, r1, #1\n" // Set the CYCCNTENA bit - " STR r1, [r0]\n" // Enable the cycle count register - /* Configure SysTick for 100Hz clock, or 16384 cycles if no reference. */ - " MOV r0, #0xE000E000\n" // Build address of NVIC registers - " LDR r1, =59999\n" // 59,999 = SYSTICK_CYCLES = ((6,000,000 / 100) -1) - " STR r1, [r0, #0x14]\n" // Setup SysTick Reload Value - " MOV r1, #0x7\n" // Build SysTick Control Enable Value - " STR r1, [r0, #0x10]\n" // Setup SysTick Control - /* Configure handler priorities. */ - " LDR r1, =0x00000000\n" // Rsrv, UsgF, BusF, MemM - " STR r1, [r0, #0xD18]\n" // Setup System Handlers 4-7 Priority Registers - " LDR r1, =0xFF000000\n" // SVCl, Rsrv, Rsrv, Rsrv - " STR r1, [r0, #0xD1C]\n" // Setup System Handlers 8-11 Priority Registers - // Note: SVC must be lowest priority, which is 0xFF - " LDR r1, =0x40FF0000\n" // SysT, PnSV, Rsrv, DbgM - " STR r1, [r0, #0xD20]\n" // Setup System Handlers 12-15 Priority Registers - // Note: PnSV must be lowest priority, which is 0xFF - /* Return to caller. */ - " BX lr\n"); -} - -/* SysTick_Handler has a generic interrupt handler template. */ -/* to implement a new handler, replace the call to */ -/* _tx_timer_interrupt to some other c function */ -VOID SysTick_Handler(VOID) { -#ifdef TX_ENABLE_EXECUTION_CHANGE_NOTIFY - _tx_execution_isr_enter(); // Call the ISR enter function -#endif - - _tx_timer_interrupt(); - -#ifdef TX_ENABLE_EXECUTION_CHANGE_NOTIFY - _tx_execution_isr_exit(); // Call the ISR exit function -#endif - - return; -} |