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/**
* @file main.c
* Entry point for operating system
*
* Copyright (C) 2018 Clyne Sullivan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <clock.h>
#include <display.h>
#include <display_draw.h>
#include <flash.h>
#include <gpio.h>
#include <heap.h>
#include <initrd.h>
#include <keypad.h>
#include <lcd.h>
#include <it/parser.h>
#include <random.h>
#include <script.h>
#include <serial.h>
#include <stm32l476xx.h>
#include <string.h>
#include <task.h>
extern uint8_t __bss_end__;
extern char *itoa(int, char *, int);
void kmain(void);
void task_interpreter(void);
int main(void)
{
asm("cpsid i");
// disable cached writes for precise debug info
//*((uint32_t *)0xE000E008) |= 2;
// prepare flash latency for 80MHz operation
FLASH->ACR &= ~(FLASH_ACR_LATENCY);
FLASH->ACR |= FLASH_ACR_LATENCY_4WS;
clock_init();
heap_init(&__bss_end__);
gpio_init();
serial_init();
random_init();
keypad_init();
gpio_mode(GPIOA, 5, OUTPUT);
// enable FPU
SCB->CPACR |= (0xF << 20);
// enable MPU
//MPU->CTRL |= MPU_CTRL_PRIVDEFENA_Msk | MPU_CTRL_ENABLE_Msk;
task_init(kmain);
while (1);
}
void kmain(void)
{
dsp_init();
dsp_rect(0, 0, LCD_WIDTH, LCD_HEIGHT, dsp_color(0, 0, 0));
dsp_cursoron();
keypad_start();
task_start(task_interpreter, 4096);
while (1) {
gpio_dout(GPIOA, 5, 1);
delay(250);
gpio_dout(GPIOA, 5, 0);
delay(250);
}
}
void task_interpreter(void)
{
instance *it = inewinstance();
script_loadlib(it);
char *s = initrd_getfile("init");
if (s == 0) {
dsp_puts("can't find init");
goto end;
}
char *linebuf = (char *)malloc(120);
uint32_t i = 0, prev = 0, lc;
uint32_t size = initrd_getfilesize("init");
int ret = 0;
while (i < size) {
for (; s[i] != '\n' && s[i] != '\0'; i++);
lc = i - prev;
if (lc == 0) {
prev = ++i;
continue;
}
strncpy(linebuf, s + prev, lc + 1);
linebuf[lc] = '\0';
ret = idoline(it, linebuf);
if (ret < 0)
break;
prev = ++i;
}
if (ret < 0) {
dsp_puts("\nError: ");
dsp_puts(itoa(ret, linebuf, 10));
}
free(linebuf);
//iend(&it); // nah
end:
while (1)
delay(10);
}
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