Initial commit

start.S

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+# Copyright 2023 Dual Tachyon
+# https://github.com/DualTachyon
+#
+# 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.
+
+	.cpu cortex-m0
+	.fpu softvfp
+	.thumb
+
+	.global Stack
+	.global HandlerReset
+	.global Main
+
+	.global OVERLAY_Install
+	.global BOARD_FLASH_Init
+	.global BSS_Init
+
+	.global SystickHandler
+	.weak SystickHandler
+
+	.section .text.isr
+
+Stack:
+	.long	0x20003FF0
+Reset:
+	.long	HandlerReset + 1
+NMI:
+	.long	HandlerNMI + 1
+HardFault:
+	.long	HandlerHardFault + 1
+Reserved_10:
+	.long	0
+Reserved_14:
+	.long	0
+Reserved_18:
+	.long	0
+Reserved_1C:
+	.long	0
+Reserved_20:
+	.long	0
+Reserved_24:
+	.long	0
+Reserved_28:
+	.long	0
+SVCall:
+	.long	HandlerSVCall + 1
+Reserved_30:
+	.long	0
+Reserved_34:
+	.long	0
+PendSV:
+	.long	HandlerPendSV + 1
+SysTick:
+	.long	SystickHandler + 1
+WWDT:
+	.long	HandlerWWDT + 1
+IWDT:
+	.long	HandlerIWDT + 1
+RTC:
+	.long	HandlerRTC + 1
+DMA:
+	.long	HandlerDMA + 1
+SARADC:
+	.long	HandlerSARADC + 1
+TIMER_BASE0:
+	.long	HandlerTIMER_BASE0 + 1
+TIMER_BASE1:
+	.long	HandlerTIMER_BASE1 + 1
+TIMER_PLUS0:
+	.long	HandlerTIMER_PLUS0 + 1
+TIMER_PLUS1:
+	.long	HandlerTIMER_PLUS1 + 1
+PWM_BASE0:
+	.long	HandlerPWM_BASE0 + 1
+PWM_BASE1:
+	.long	HandlerPWM_BASE1 + 1
+PWM_PLUS0:
+	.long	HandlerPWM_PLUS0 + 1
+PWM_PLUS1:
+	.long	HandlerPWM_PLUS1 + 1
+UART0:
+	.long	HandlerUART0 + 1
+UART1:
+	.long	HandlerUART1 + 1
+UART2:
+	.long	HandlerUART2 + 1
+SPI0:
+	.long	HandlerSPI0 + 1
+SPI1:
+	.long	HandlerSPI1 + 1
+IIC0:
+	.long	HandlerIIC0 + 1
+IIC1:
+	.long	HandlerIIC1 + 1
+CMP:
+	.long	HandlerCMP + 1
+TIMER_BASE2:
+	.long	HandlerTIMER_BASE2 + 1
+GPIOA5:
+	.long	HandlerGPIOA5 + 1
+GPIOA6:
+	.long	HandlerGPIOA6 + 1
+GPIOA7:
+	.long	HandlerGPIOA7 + 1
+GPIOB0:
+	.long	HandlerGPIOB0 + 1
+GPIOB1:
+	.long	HandlerGPIOB1 + 1
+GPIOC0:
+	.long	HandlerGPIOC0 + 1
+GPIOC1:
+	.long	HandlerGPIOC1 + 1
+GPIOA:
+	.long	HandlerGPIOA + 1
+GPIOB:
+	.long	HandlerGPIOB + 1
+GPIOC:
+	.long	HandlerGPIOC + 1
+
+	.section .text
+
+HandlerNMI:
+	b	.
+
+HandlerHardFault:
+	b	.
+
+HandlerSVCall:
+	b	.
+
+HandlerPendSV:
+	b	.
+
+SystickHandler:
+	bx	lr
+
+HandlerWWDT:
+	b	.
+
+HandlerIWDT:
+	b	.
+
+HandlerRTC:
+	b	.
+
+HandlerDMA:
+	b	.
+
+HandlerSARADC:
+	b	.
+
+HandlerTIMER_BASE0:
+	b	.
+
+HandlerTIMER_BASE1:
+	b	.
+
+HandlerTIMER_PLUS0:
+	b	.
+
+HandlerTIMER_PLUS1:
+	b	.
+
+HandlerPWM_BASE0:
+	b	.
+
+HandlerPWM_BASE1:
+	b	.
+
+HandlerPWM_PLUS0:
+	b	.
+
+HandlerPWM_PLUS1:
+	b	.
+
+HandlerUART0:
+	b	.
+
+HandlerUART1:
+	b	.
+
+HandlerUART2:
+	b	.
+
+HandlerSPI0:
+	b	.
+
+HandlerSPI1:
+	b	.
+
+HandlerIIC0:
+	b	.
+
+HandlerIIC1:
+	b	.
+
+HandlerCMP:
+	b	.
+
+HandlerTIMER_BASE2:
+	b	.
+
+HandlerGPIOA5:
+	b	.
+
+HandlerGPIOA6:
+	b	.
+
+HandlerGPIOA7:
+	b	.
+
+HandlerGPIOB0:
+	b	.
+
+HandlerGPIOB1:
+	b	.
+
+HandlerGPIOC0:
+	b	.
+
+HandlerGPIOC1:
+	b	.
+
+HandlerGPIOA:
+	b	.
+
+HandlerGPIOB:
+	b	.
+
+HandlerGPIOC:
+	b	.
+
+HandlerReset:
+	ldr	r0, =0x20003FF0
+	mov	sp, r0
+	bl	DATA_Init
+	bl	BSS_Init
+	bl	BOARD_FLASH_Init
+	bl	Main
+	b 	.
+