mirror of
https://github.com/W3SLAV/automicropython_nds.git
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93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2021 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <nds.h>
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#include <stdio.h>
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#include <string.h>
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extern uint32_t _estack, _sidata, _sdata, _edata, _sbss, _ebss;
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void Reset_Handler(void) __attribute__((naked));
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void bare_main(void);
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static void nds_init(void);
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// ARM9 vector table (simplified for libnds)
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const uint32_t isr_vector[] __attribute__((section(".isr_vector"))) = {
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(uint32_t)&_estack,
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(uint32_t)&Reset_Handler,
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};
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// The CPU runs this function after a reset.
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void Reset_Handler(void) {
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// Set stack pointer.
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__asm volatile ("ldr sp, =_estack");
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// Copy .data section from flash to RAM.
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memcpy(&_sdata, &_sidata, (char *)&_edata - (char *)&_sdata);
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// Zero out .bss section.
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memset(&_sbss, 0, (char *)&_ebss - (char *)&_sbss);
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// Initialize the CPU and peripherals.
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nds_init();
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// Now that there is a basic system up and running, call the main application code.
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bare_main();
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// This function must not return.
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for (;;) {
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}
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}
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// Set up the Nintendo DS (ARM9).
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static void nds_init(void) {
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// Initialize the console for printing to the screen.
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consoleDemoInit();
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// Initialize the hardware and other peripherals.
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powerOn(POWER_ALL);
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//irqInit();
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//irqEnable(IRQ_VBLANK);
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}
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// Write a character out to the console.
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static inline void console_write_char(int c) {
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// Print the character to the console.
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iprintf("%c", c);
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}
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// Send string of given length to stdout, converting \n to \r\n.
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void mp_hal_stdout_tx_strn_cooked(const char *str, size_t len) {
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while (len--) {
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if (*str == '\n') {
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console_write_char('\r');
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}
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console_write_char(*str++);
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}
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}
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