added prescaler for 16 bit pwm in LPC1347 target
Fork of mbed-dev by
targets/cmsis/TARGET_NXP/TARGET_LPC81X/TOOLCHAIN_GCC_ARM/startup_LPC81X.S@0:9b334a45a8ff, 2015-10-01 (annotated)
- Committer:
- bogdanm
- Date:
- Thu Oct 01 15:25:22 2015 +0300
- Revision:
- 0:9b334a45a8ff
- Child:
- 144:ef7eb2e8f9f7
Initial commit on mbed-dev
Replaces mbed-src (now inactive)
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 0:9b334a45a8ff | 1 | /* File: startup_ARMCM0.S |
bogdanm | 0:9b334a45a8ff | 2 | * Purpose: startup file for Cortex-M0 devices. Should use with |
bogdanm | 0:9b334a45a8ff | 3 | * GCC for ARM Embedded Processors |
bogdanm | 0:9b334a45a8ff | 4 | * Version: V1.2 |
bogdanm | 0:9b334a45a8ff | 5 | * Date: 15 Nov 2011 |
bogdanm | 0:9b334a45a8ff | 6 | * |
bogdanm | 0:9b334a45a8ff | 7 | * Copyright (c) 2011, ARM Limited |
bogdanm | 0:9b334a45a8ff | 8 | * All rights reserved. |
bogdanm | 0:9b334a45a8ff | 9 | * |
bogdanm | 0:9b334a45a8ff | 10 | * Redistribution and use in source and binary forms, with or without |
bogdanm | 0:9b334a45a8ff | 11 | * modification, are permitted provided that the following conditions are met: |
bogdanm | 0:9b334a45a8ff | 12 | * Redistributions of source code must retain the above copyright |
bogdanm | 0:9b334a45a8ff | 13 | notice, this list of conditions and the following disclaimer. |
bogdanm | 0:9b334a45a8ff | 14 | * Redistributions in binary form must reproduce the above copyright |
bogdanm | 0:9b334a45a8ff | 15 | notice, this list of conditions and the following disclaimer in the |
bogdanm | 0:9b334a45a8ff | 16 | documentation and/or other materials provided with the distribution. |
bogdanm | 0:9b334a45a8ff | 17 | * Neither the name of the ARM Limited nor the |
bogdanm | 0:9b334a45a8ff | 18 | names of its contributors may be used to endorse or promote products |
bogdanm | 0:9b334a45a8ff | 19 | derived from this software without specific prior written permission. |
bogdanm | 0:9b334a45a8ff | 20 | * |
bogdanm | 0:9b334a45a8ff | 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
bogdanm | 0:9b334a45a8ff | 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
bogdanm | 0:9b334a45a8ff | 23 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
bogdanm | 0:9b334a45a8ff | 24 | * DISCLAIMED. IN NO EVENT SHALL ARM LIMITED BE LIABLE FOR ANY |
bogdanm | 0:9b334a45a8ff | 25 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
bogdanm | 0:9b334a45a8ff | 26 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
bogdanm | 0:9b334a45a8ff | 27 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
bogdanm | 0:9b334a45a8ff | 28 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
bogdanm | 0:9b334a45a8ff | 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
bogdanm | 0:9b334a45a8ff | 30 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
bogdanm | 0:9b334a45a8ff | 31 | */ |
bogdanm | 0:9b334a45a8ff | 32 | .syntax unified |
bogdanm | 0:9b334a45a8ff | 33 | .arch armv6-m |
bogdanm | 0:9b334a45a8ff | 34 | |
bogdanm | 0:9b334a45a8ff | 35 | /* Memory Model |
bogdanm | 0:9b334a45a8ff | 36 | The HEAP starts at the end of the DATA section and grows upward. |
bogdanm | 0:9b334a45a8ff | 37 | |
bogdanm | 0:9b334a45a8ff | 38 | The STACK starts at the end of the RAM and grows downward. |
bogdanm | 0:9b334a45a8ff | 39 | |
bogdanm | 0:9b334a45a8ff | 40 | The HEAP and stack STACK are only checked at compile time: |
bogdanm | 0:9b334a45a8ff | 41 | (DATA_SIZE + HEAP_SIZE + STACK_SIZE) < RAM_SIZE |
bogdanm | 0:9b334a45a8ff | 42 | |
bogdanm | 0:9b334a45a8ff | 43 | This is just a check for the bare minimum for the Heap+Stack area before |
bogdanm | 0:9b334a45a8ff | 44 | aborting compilation, it is not the run time limit: |
bogdanm | 0:9b334a45a8ff | 45 | Heap_Size + Stack_Size = 0x80 + 0x80 = 0x100 |
bogdanm | 0:9b334a45a8ff | 46 | */ |
bogdanm | 0:9b334a45a8ff | 47 | .section .stack |
bogdanm | 0:9b334a45a8ff | 48 | .align 3 |
bogdanm | 0:9b334a45a8ff | 49 | #ifdef __STACK_SIZE |
bogdanm | 0:9b334a45a8ff | 50 | .equ Stack_Size, __STACK_SIZE |
bogdanm | 0:9b334a45a8ff | 51 | #else |
bogdanm | 0:9b334a45a8ff | 52 | .equ Stack_Size, 0x80 |
bogdanm | 0:9b334a45a8ff | 53 | #endif |
bogdanm | 0:9b334a45a8ff | 54 | .globl __StackTop |
bogdanm | 0:9b334a45a8ff | 55 | .globl __StackLimit |
bogdanm | 0:9b334a45a8ff | 56 | __StackLimit: |
bogdanm | 0:9b334a45a8ff | 57 | .space Stack_Size |
bogdanm | 0:9b334a45a8ff | 58 | .size __StackLimit, . - __StackLimit |
bogdanm | 0:9b334a45a8ff | 59 | __StackTop: |
bogdanm | 0:9b334a45a8ff | 60 | .size __StackTop, . - __StackTop |
bogdanm | 0:9b334a45a8ff | 61 | |
bogdanm | 0:9b334a45a8ff | 62 | .section .heap |
bogdanm | 0:9b334a45a8ff | 63 | .align 3 |
bogdanm | 0:9b334a45a8ff | 64 | #ifdef __HEAP_SIZE |
bogdanm | 0:9b334a45a8ff | 65 | .equ Heap_Size, __HEAP_SIZE |
bogdanm | 0:9b334a45a8ff | 66 | #else |
bogdanm | 0:9b334a45a8ff | 67 | .equ Heap_Size, 0x80 |
bogdanm | 0:9b334a45a8ff | 68 | #endif |
bogdanm | 0:9b334a45a8ff | 69 | .globl __HeapBase |
bogdanm | 0:9b334a45a8ff | 70 | .globl __HeapLimit |
bogdanm | 0:9b334a45a8ff | 71 | __HeapBase: |
bogdanm | 0:9b334a45a8ff | 72 | .space Heap_Size |
bogdanm | 0:9b334a45a8ff | 73 | .size __HeapBase, . - __HeapBase |
bogdanm | 0:9b334a45a8ff | 74 | __HeapLimit: |
bogdanm | 0:9b334a45a8ff | 75 | .size __HeapLimit, . - __HeapLimit |
bogdanm | 0:9b334a45a8ff | 76 | |
bogdanm | 0:9b334a45a8ff | 77 | .section .isr_vector |
bogdanm | 0:9b334a45a8ff | 78 | .align 2 |
bogdanm | 0:9b334a45a8ff | 79 | .globl __isr_vector |
bogdanm | 0:9b334a45a8ff | 80 | __isr_vector: |
bogdanm | 0:9b334a45a8ff | 81 | .long __StackTop /* Top of Stack */ |
bogdanm | 0:9b334a45a8ff | 82 | .long Reset_Handler /* Reset Handler */ |
bogdanm | 0:9b334a45a8ff | 83 | .long NMI_Handler /* NMI Handler */ |
bogdanm | 0:9b334a45a8ff | 84 | .long HardFault_Handler /* Hard Fault Handler */ |
bogdanm | 0:9b334a45a8ff | 85 | .long 0 /* Reserved */ |
bogdanm | 0:9b334a45a8ff | 86 | .long 0 /* Reserved */ |
bogdanm | 0:9b334a45a8ff | 87 | .long 0 /* Reserved */ |
bogdanm | 0:9b334a45a8ff | 88 | .long 0 /* Reserved */ |
bogdanm | 0:9b334a45a8ff | 89 | .long 0 /* Reserved */ |
bogdanm | 0:9b334a45a8ff | 90 | .long 0 /* Reserved */ |
bogdanm | 0:9b334a45a8ff | 91 | .long 0 /* Reserved */ |
bogdanm | 0:9b334a45a8ff | 92 | .long SVC_Handler /* SVCall Handler */ |
bogdanm | 0:9b334a45a8ff | 93 | .long 0 /* Reserved */ |
bogdanm | 0:9b334a45a8ff | 94 | .long 0 /* Reserved */ |
bogdanm | 0:9b334a45a8ff | 95 | .long PendSV_Handler /* PendSV Handler */ |
bogdanm | 0:9b334a45a8ff | 96 | .long SysTick_Handler /* SysTick Handler */ |
bogdanm | 0:9b334a45a8ff | 97 | |
bogdanm | 0:9b334a45a8ff | 98 | /* LPC810 interrupts */ |
bogdanm | 0:9b334a45a8ff | 99 | .long SPI0_IRQHandler // SPI0 controller |
bogdanm | 0:9b334a45a8ff | 100 | .long SPI1_IRQHandler // SPI1 controller |
bogdanm | 0:9b334a45a8ff | 101 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 102 | .long UART0_IRQHandler // UART0 |
bogdanm | 0:9b334a45a8ff | 103 | .long UART1_IRQHandler // UART1 |
bogdanm | 0:9b334a45a8ff | 104 | .long UART2_IRQHandler // UART2 |
bogdanm | 0:9b334a45a8ff | 105 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 106 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 107 | .long I2C_IRQHandler // I2C controller |
bogdanm | 0:9b334a45a8ff | 108 | .long SCT_IRQHandler // Smart Counter Timer |
bogdanm | 0:9b334a45a8ff | 109 | .long MRT_IRQHandler // Multi-Rate Timer |
bogdanm | 0:9b334a45a8ff | 110 | .long CMP_IRQHandler // Comparator |
bogdanm | 0:9b334a45a8ff | 111 | .long WDT_IRQHandler // PIO1 (0:11) |
bogdanm | 0:9b334a45a8ff | 112 | .long BOD_IRQHandler // Brown Out Detect |
bogdanm | 0:9b334a45a8ff | 113 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 114 | .long WKT_IRQHandler // Wakeup timer |
bogdanm | 0:9b334a45a8ff | 115 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 116 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 117 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 118 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 119 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 120 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 121 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 122 | .long 0 // Reserved |
bogdanm | 0:9b334a45a8ff | 123 | .long PININT0_IRQHandler // PIO INT0 |
bogdanm | 0:9b334a45a8ff | 124 | .long PININT1_IRQHandler // PIO INT1 |
bogdanm | 0:9b334a45a8ff | 125 | .long PININT2_IRQHandler // PIO INT2 |
bogdanm | 0:9b334a45a8ff | 126 | .long PININT3_IRQHandler // PIO INT3 |
bogdanm | 0:9b334a45a8ff | 127 | .long PININT4_IRQHandler // PIO INT4 |
bogdanm | 0:9b334a45a8ff | 128 | .long PININT5_IRQHandler // PIO INT5 |
bogdanm | 0:9b334a45a8ff | 129 | .long PININT6_IRQHandler // PIO INT6 |
bogdanm | 0:9b334a45a8ff | 130 | .long PININT7_IRQHandler // PIO INT7 |
bogdanm | 0:9b334a45a8ff | 131 | |
bogdanm | 0:9b334a45a8ff | 132 | .size __isr_vector, . - __isr_vector |
bogdanm | 0:9b334a45a8ff | 133 | |
bogdanm | 0:9b334a45a8ff | 134 | .section .text.Reset_Handler |
bogdanm | 0:9b334a45a8ff | 135 | .thumb |
bogdanm | 0:9b334a45a8ff | 136 | .thumb_func |
bogdanm | 0:9b334a45a8ff | 137 | .align 2 |
bogdanm | 0:9b334a45a8ff | 138 | .globl Reset_Handler |
bogdanm | 0:9b334a45a8ff | 139 | .type Reset_Handler, %function |
bogdanm | 0:9b334a45a8ff | 140 | Reset_Handler: |
bogdanm | 0:9b334a45a8ff | 141 | /* Loop to copy data from read only memory to RAM. The ranges |
bogdanm | 0:9b334a45a8ff | 142 | * of copy from/to are specified by following symbols evaluated in |
bogdanm | 0:9b334a45a8ff | 143 | * linker script. |
bogdanm | 0:9b334a45a8ff | 144 | * __etext: End of code section, i.e., begin of data sections to copy from. |
bogdanm | 0:9b334a45a8ff | 145 | * __data_start__/__data_end__: RAM address range that data should be |
bogdanm | 0:9b334a45a8ff | 146 | * copied to. Both must be aligned to 4 bytes boundary. */ |
bogdanm | 0:9b334a45a8ff | 147 | |
bogdanm | 0:9b334a45a8ff | 148 | ldr r1, =__etext |
bogdanm | 0:9b334a45a8ff | 149 | ldr r2, =__data_start__ |
bogdanm | 0:9b334a45a8ff | 150 | ldr r3, =__data_end__ |
bogdanm | 0:9b334a45a8ff | 151 | |
bogdanm | 0:9b334a45a8ff | 152 | subs r3, r2 |
bogdanm | 0:9b334a45a8ff | 153 | ble .Lflash_to_ram_loop_end |
bogdanm | 0:9b334a45a8ff | 154 | |
bogdanm | 0:9b334a45a8ff | 155 | movs r4, 0 |
bogdanm | 0:9b334a45a8ff | 156 | .Lflash_to_ram_loop: |
bogdanm | 0:9b334a45a8ff | 157 | ldr r0, [r1,r4] |
bogdanm | 0:9b334a45a8ff | 158 | str r0, [r2,r4] |
bogdanm | 0:9b334a45a8ff | 159 | adds r4, 4 |
bogdanm | 0:9b334a45a8ff | 160 | cmp r4, r3 |
bogdanm | 0:9b334a45a8ff | 161 | blt .Lflash_to_ram_loop |
bogdanm | 0:9b334a45a8ff | 162 | .Lflash_to_ram_loop_end: |
bogdanm | 0:9b334a45a8ff | 163 | |
bogdanm | 0:9b334a45a8ff | 164 | ldr r0, =SystemInit |
bogdanm | 0:9b334a45a8ff | 165 | blx r0 |
bogdanm | 0:9b334a45a8ff | 166 | ldr r0, =_start |
bogdanm | 0:9b334a45a8ff | 167 | bx r0 |
bogdanm | 0:9b334a45a8ff | 168 | .pool |
bogdanm | 0:9b334a45a8ff | 169 | .size Reset_Handler, . - Reset_Handler |
bogdanm | 0:9b334a45a8ff | 170 | |
bogdanm | 0:9b334a45a8ff | 171 | .text |
bogdanm | 0:9b334a45a8ff | 172 | /* Macro to define default handlers. Default handler |
bogdanm | 0:9b334a45a8ff | 173 | * will be weak symbol and just dead loops. They can be |
bogdanm | 0:9b334a45a8ff | 174 | * overwritten by other handlers */ |
bogdanm | 0:9b334a45a8ff | 175 | .macro def_default_handler handler_name |
bogdanm | 0:9b334a45a8ff | 176 | .align 1 |
bogdanm | 0:9b334a45a8ff | 177 | .thumb_func |
bogdanm | 0:9b334a45a8ff | 178 | .weak \handler_name |
bogdanm | 0:9b334a45a8ff | 179 | .type \handler_name, %function |
bogdanm | 0:9b334a45a8ff | 180 | \handler_name : |
bogdanm | 0:9b334a45a8ff | 181 | b . |
bogdanm | 0:9b334a45a8ff | 182 | .size \handler_name, . - \handler_name |
bogdanm | 0:9b334a45a8ff | 183 | .endm |
bogdanm | 0:9b334a45a8ff | 184 | |
bogdanm | 0:9b334a45a8ff | 185 | def_default_handler NMI_Handler |
bogdanm | 0:9b334a45a8ff | 186 | def_default_handler HardFault_Handler |
bogdanm | 0:9b334a45a8ff | 187 | def_default_handler SVC_Handler |
bogdanm | 0:9b334a45a8ff | 188 | def_default_handler PendSV_Handler |
bogdanm | 0:9b334a45a8ff | 189 | def_default_handler SysTick_Handler |
bogdanm | 0:9b334a45a8ff | 190 | def_default_handler Default_Handler |
bogdanm | 0:9b334a45a8ff | 191 | |
bogdanm | 0:9b334a45a8ff | 192 | .macro def_irq_default_handler handler_name |
bogdanm | 0:9b334a45a8ff | 193 | .weak \handler_name |
bogdanm | 0:9b334a45a8ff | 194 | .set \handler_name, Default_Handler |
bogdanm | 0:9b334a45a8ff | 195 | .endm |
bogdanm | 0:9b334a45a8ff | 196 | |
bogdanm | 0:9b334a45a8ff | 197 | def_irq_default_handler SPI0_IRQHandler |
bogdanm | 0:9b334a45a8ff | 198 | def_irq_default_handler SPI1_IRQHandler |
bogdanm | 0:9b334a45a8ff | 199 | def_irq_default_handler UART0_IRQHandler |
bogdanm | 0:9b334a45a8ff | 200 | def_irq_default_handler UART1_IRQHandler |
bogdanm | 0:9b334a45a8ff | 201 | def_irq_default_handler UART2_IRQHandler |
bogdanm | 0:9b334a45a8ff | 202 | def_irq_default_handler I2C_IRQHandler |
bogdanm | 0:9b334a45a8ff | 203 | def_irq_default_handler SCT_IRQHandler |
bogdanm | 0:9b334a45a8ff | 204 | def_irq_default_handler MRT_IRQHandler |
bogdanm | 0:9b334a45a8ff | 205 | def_irq_default_handler CMP_IRQHandler |
bogdanm | 0:9b334a45a8ff | 206 | def_irq_default_handler WDT_IRQHandler |
bogdanm | 0:9b334a45a8ff | 207 | def_irq_default_handler BOD_IRQHandler |
bogdanm | 0:9b334a45a8ff | 208 | def_irq_default_handler WKT_IRQHandler |
bogdanm | 0:9b334a45a8ff | 209 | def_irq_default_handler PININT0_IRQHandler |
bogdanm | 0:9b334a45a8ff | 210 | def_irq_default_handler PININT1_IRQHandler |
bogdanm | 0:9b334a45a8ff | 211 | def_irq_default_handler PININT2_IRQHandler |
bogdanm | 0:9b334a45a8ff | 212 | def_irq_default_handler PININT3_IRQHandler |
bogdanm | 0:9b334a45a8ff | 213 | def_irq_default_handler PININT4_IRQHandler |
bogdanm | 0:9b334a45a8ff | 214 | def_irq_default_handler PININT5_IRQHandler |
bogdanm | 0:9b334a45a8ff | 215 | def_irq_default_handler PININT6_IRQHandler |
bogdanm | 0:9b334a45a8ff | 216 | def_irq_default_handler PININT7_IRQHandler |
bogdanm | 0:9b334a45a8ff | 217 | |
bogdanm | 0:9b334a45a8ff | 218 | .end |
bogdanm | 0:9b334a45a8ff | 219 |