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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 <display_text.h>
#include <fat32.h>
#include <flash.h>
#include <gpio.h>
#include <heap.h>
#include <keypad.h>
#include <it/parser.h>
#include <random.h>
#include <script.h>
#include <sdcard.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);
void task_status(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;
// init core components
clock_init();
heap_init(&__bss_end__);
random_init();
gpio_init();
serial_init();
keypad_init();
flash_init();
// enable FPU
SCB->CPACR |= (0xF << 20);
task_init(kmain);
while (1);
}
// enters deep sleep, activated through button press
void sleep(void)
{
dsp_sleep();
*((uint32_t *)0xE000ED10) |= 4; // SLEEPDEEP
PWR->CR1 |= 2;
asm("wfi");
}
// wakes up from sleep, re-initializes components that
// need to be
void wakeup(void)
{
clock_init();
dsp_wakeup();
}
void kmain(void)
{
// prepare display
dsp_init();
dsp_cursoron();
text_init();
// prepare SD card and keypad
sd_init();
fat_find();
keypad_start();
// start tasks
task_start(task_interpreter, 4096);
task_start(task_status, 512);
while (1) {
extern uint32_t sleep_pending;
if (sleep_pending != 0) {
sleep();
while (sleep_pending)
delay(1);
}
delay(100);
}
}
/**
* Loads the given script on SD card into an interpreter instance.
* @param name the file's name
* @return a new, loaded instance
* Files are expected to be in the root directory of the filesystem.
* See fat32.h for more info.
* Pass the returned instance to irun() to start the script.
*/
instance *load_program(const char *name)
{
// load file
file_t *file = fat_findfile(name);
if (file == 0) {
text_puts("can't find ");
text_puts(name);
goto fail;
}
char *s = fat_readfile(file);
instance *it = inewinstance();
script_loadlib(it);
// read in, parse into script code
char *linebuf = (char *)malloc(120);
uint32_t i = 0, prev = 0, lc;
uint32_t size = file->size;
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 = iaddline(it, linebuf);
if (ret != 0)
goto fail;
prev = ++i;
}
free(linebuf);
free(s);
free(file);
return it;
fail:
while (1);
return 0;
}
/**
* Display and update a status bar.
* This currently only has an icon for insert/delete mode.
*/
void task_status(void)
{
extern int keypad_insert;
int lastInsert = -1;
int16_t bg = dsp_color(0x3F, 0x3F, 0x3F);
int16_t red = dsp_color(0xFF, 0, 0);
int16_t green = dsp_color(0, 0xFF, 0);
dsp_rect(0, 300, 480, 20, bg);
while (1) {
if (lastInsert != keypad_insert) {
lastInsert = keypad_insert;
dsp_rect(0, 300, 480, 20, bg);
if (lastInsert > 0)
dsp_rect(4, 304, 12, 12, green);
else
dsp_rect(4, 304, 12, 12, red);
}
delay(500);
}
}
/**
* Loads the initial program from the SD card and runs it.
*/
void task_interpreter(void)
{
dsp_rect(0, 0, 480, 300, 0);
instance *it = load_program("init");
// run the script
/*int ret =*/ irun(it);
//if (ret != 0)
//goto end;
idelinstance(it);
//end:
while (1)
delay(10);
/*fail:
if (ret < 0) {
dsp_puts("\nError: ");
dsp_puts(itoa(ret, linebuf, 10));
}
goto end;*/
}
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