/**
* Disables notifications on tap or double tap events
*
* @param Pointer to sensor structure
* @param which event to get notifications for
*
* @return 0 on success, non-zero on failure
*/
static int
adxl345_sensor_unset_notification(struct sensor * sensor,
sensor_event_type_t sensor_event_type)
{
#if MYNEWT_VAL(ADXL345_INT_ENABLE)
struct adxl345 * adxl345;
uint8_t ints_to_disable = 0;
if ((sensor_event_type & ~(SENSOR_EVENT_TYPE_DOUBLE_TAP |
SENSOR_EVENT_TYPE_SINGLE_TAP)) != 0) {
return SYS_EINVAL;
}
/*XXX for now we do not support registering for both events */
if (sensor_event_type == (SENSOR_EVENT_TYPE_DOUBLE_TAP |
SENSOR_EVENT_TYPE_SINGLE_TAP)) {
return SYS_EINVAL;
}
adxl345 = (struct adxl345 *)SENSOR_GET_DEVICE(sensor);
adxl345->pdd.notify_ctx.snec_evtype &= ~sensor_event_type;
adxl345->pdd.registered_mask &= ~ADXL345_NOTIFY_MASK;
ints_to_disable |= ADXL345_INT_SINGLE_TAP_BIT;
ints_to_disable |= ADXL345_INT_DOUBLE_TAP_BIT;
return disable_interrupt(sensor, ints_to_disable);
#else
return SYS_ENODEV;
#endif
}
void i2c_setup_interrupt(const hw_module_t *port, bool state)
{
if (state) {
// register the IRQ sub-routine
register_interrupt_routine(port->irq_id, port->irq_subroutine);
// enable the IRQ at the ARM core level
enable_interrupt(port->irq_id, CPU_0, 0);
// clear the status register
HW_I2C_I2SR_WR(port->instance, 0);
// and enable the interrupts in the I2C controller
HW_I2C_I2CR(port->instance).B.IIEN = 1;
} else {
// disable the IRQ at the ARM core level
disable_interrupt(port->irq_id, CPU_0);
// and disable the interrupts in the I2C controller
HW_I2C_I2CR(port->instance).B.IIEN = 0;
// clear the status register
HW_I2C_I2SR_WR(port->instance, 0);
}
}
static int boot_rockbox(void)
{
int rc;
void (*kernel_entry)(void);
printf("Mounting disk...");
rc = disk_mount_all();
if (rc <= 0)
error(EDISK,rc, true);
printf("Loading firmware...");
rc = load_firmware((unsigned char *)CONFIG_SDRAM_START, BOOTFILE, 0x400000);
if(rc <= EFILE_EMPTY)
return rc;
else
{
printf("Starting Rockbox...");
adc_close(); /* Disable SADC, seems to fix the re-init Rockbox does */
disable_interrupt();
kernel_entry = (void*) CONFIG_SDRAM_START;
kernel_entry();
return 0; /* Shouldn't happen */
}
}
/**
* Run all kernel module initializers.
*/
void exec_init_array(void)
{
extern void dyndebug_early_boot_init(void);
extern void kmem_init(void);
extern void dynmem_init(void);
extern void vralloc_init(void);
int n;
#ifdef configDYNDEBUG
dyndebug_early_boot_init();
#endif
kputs("\n\nZeKe PreInit\n");
n = __hw_preinit_array_end - __hw_preinit_array_start;
exec_array(__hw_preinit_array_start, n);
/*
* Memory allocator initializers.
*/
kmem_init();
dynmem_init();
vralloc_init();
kputs("SubsysInit\n");
n = __init_array_end - __init_array_start;
exec_array(__init_array_start, n);
kputs("PostInit\n");
disable_interrupt();
n = __hw_postinit_array_end - __hw_postinit_array_start;
exec_array(__hw_postinit_array_start, n);
enable_interrupt();
}
void pre_init(void) {
morecore_area = core_buf;
morecore_size = SERVER_CORE_SIZE;
serial_lock();
// Initialize the serial port
set_dlab(0); // we always assume the dlab is 0 unless we explicitly change it
disable_interrupt();
disable_fifo();
reset_lcr();
reset_mcr();
clear_iir();
set_baud_rate(BAUD_RATE);
reset_state();
enable_fifo();
enable_interrupt();
clear_iir();
// all done
init_colours();
/* query what getchar clients exist */
num_getchar_clients = getchar_num_badges();
getchar_clients = calloc(num_getchar_clients, sizeof(getchar_client_t));
for (int i = 0; i < num_getchar_clients; i++) {
unsigned int badge = getchar_enumerate_badge(i);
assert(badge <= num_getchar_clients);
getchar_clients[badge].client_id = badge;
getchar_clients[badge].buf = getchar_buf(badge);
getchar_clients[badge].last_head = -1;
}
set_putchar(serial_putchar);
serial_irq_reg_callback(serial_irq, 0);
/* Start regular heartbeat of 500ms */
timeout_periodic(0, 500000000);
serial_unlock();
}
int main(void) {
int i;
/* TODO: run test_printk() */
/*
test_printk();
*/
disable_interrupt();
init_pcbs();
setup_irq(8, irq0_handle);
setup_irq(0x80, irq1_handle);
setup_irq(9, keyboard_int);
/*
kthread_create(test1_a, stack1+KSTACK_SIZE);
kthread_create(test1_b, stack2+KSTACK_SIZE);
kthread_create(test1_c, stack3+KSTACK_SIZE);
kthread_create(test_thread_a, stack1+KSTACK_SIZE);
kthread_create(test_thread_b, stack2+KSTACK_SIZE);
kthread_create(test_msg_c, stack1+KSTACK_SIZE);
kthread_create(test_msg_d, stack2+KSTACK_SIZE);
kthread_create(test_thread_in_thread, stack1+KSTACK_SIZE);
*/
UserThread_create(0x2000);
kthread_create(tty_driver, stack2+KSTACK_SIZE);
enable_interrupt();
while (1) {
idle_cpu();
}
}
void panic(char *str) {
/* TODO: you can modify it as your wish */
disable_interrupt();
printk("\n\n** Kernel panic: %s **\n", str);
while (1) {
idle_cpu();
}
}
void kernelUpdateCursor(int x,int y){
uint16_t cursorLocation = y * 80 + x;
disable_interrupt();
outportb(0x3D4, 14);
outportb(0x3D5, cursorLocation >> 8);
outportb(0x3D4, 15);
outportb(0x3D5, cursorLocation);
enable_interrupt();
}
/* 游戏主循环。
* 在初始化工作结束后，main函数就跳转到主循环执行。
* 在主循环执行期间随时会插入异步的中断。时钟中断最终调用timer_event，
* 键盘中断最终调用keyboard_event。中断处理完成后将返回主循环原位置继续执行。
*
* tick是时钟中断中维护的信号，数值含义是“系统到当前时刻已经发生过的时钟中断数”
* HZ是时钟控制器硬件每秒产生的中断数，在include/device/timer.h中定义
* now是主循环已经正确处理的时钟中断数，即游戏已经处理到的物理时间点
*
* 由于qemu-kvm在访问内存映射IO区域时每次都会产生陷入，在30FPS时，
* 对显存区域每秒会产生30*320*200/4次陷入，从而消耗过多时间导致跳帧的产生(实际FPS<30)。
* 在CFLAGS中增加-DSLOW可以在此情况下提升FPS。如果FPS仍太小，可以尝试
* -DTOOSLOW，此时将会采用隔行扫描的方式更新屏幕(可能会降低显示效果)。
* 这些机制的实现在device/video.c中。
* */
void
main_loop(void) {
int now = 0, target;
int num_draw = 0;
bool redraw;
while (TRUE) {
wait_for_interrupt();
disable_interrupt();
if (now == tick) {
enable_interrupt();
continue;
}
assert(now < tick);
target = tick; /* now总是小于tick，因此我们需要“追赶”当前的时间 */
enable_interrupt();
redraw = FALSE;
while (update_keypress())
;
/* 依次模拟已经错过的时钟中断。一次主循环如果执行时间长，期间可能到来多次时钟中断，
* 从而主循环中维护的时钟可能与实际时钟相差较多。为了维持游戏的正常运行，必须补上
* 期间错过的每一帧游戏逻辑。 */
while (now < target) {
/* 每隔一定时间产生一个新的字符 */
if (now % (HZ / CHARACTER_PER_SECOND) == 0) {
create_new_letter();
}
/* 每隔一定时间更新屏幕上字符的位置 */
if (now % (HZ / UPDATE_PER_SECOND) == 0) {
update_letter_pos();
}
/* 每隔一定时间需要刷新屏幕。注意到这里实现了“跳帧”的机制：假设
* HZ = 1000, FPS = 100, now = 10, target = 1000
* 即我们要模拟990个时钟中断之间发生的事件，其中包含了9次屏幕更新，
* 但redraw flag只被置一次。 */
if (now % (HZ / FPS) == 0) {
redraw = TRUE;
}
/* 更新fps统计信息 */
if (now % (HZ / 2) == 0) {
int now_fps = num_draw * 2 + 1;
if (now_fps > FPS) now_fps = FPS;
set_fps(now_fps);
num_draw = 0;
}
now ++;
}
if (redraw) { /* 当需要重新绘图时重绘 */
num_draw ++;
redraw_screen();
}
}
}
int
abort(const char *fname, int line) {
/* 当程序遇到不可恢复的错误时，首先将外部中断关闭以防其他错误发生，
* 然后显示出错信息后，等待下一个中断到来(实际永远等不到)。*/
disable_interrupt();
blue_screen(fname, line);
while (TRUE) {
wait_for_interrupt();
}
}
bool
wait_restart(void){
disable_interrupt();
if ( query_key('r' - 'a') ){
release_key('r' - 'a');
return true;
}
enable_interrupt();
return false;
}
bool
update_keypress(void){
disable_interrupt();
move_by_key('a',y,-4,SCR_WIDTH - 8);
move_by_key('d',y,4,SCR_WIDTH - 8);
move_by_key('w',x,-4,SCR_HEIGHT - 8);
move_by_key('s',x,4,SCR_HEIGHT - 8);
enable_interrupt();
return false;
}
void _changeIntRamVect (char vector, void (* funct)(void)) {
short int i;
if (vector >= sizeof(vector_it_NearRAM)/sizeof(*vector_it_NearRAM) ) return;
i = _readFlg(); /// store Interrupt flag
disable_interrupt (); /// disable interrupt
vector_it_NearRAM [vector] = funct; /// change vector in Ram Table
if (i & (1<<6)) /// restore interrupt flag
enable_interrupt ();
}
void power_off(void)
{
/* Disable interrupts on this core */
disable_interrupt(IRQ_FIQ_STATUS);
/* Mask them on both cores */
CPU_INT_DIS = -1;
COP_INT_DIS = -1;
while (1)
DEV_RS = -1;
}
static int boot_of(void)
{
int fd, rc, len, i, checksum = 0;
void (*kernel_entry)(int, void*, void*);
printf("Mounting disk...");
rc = disk_mount_all();
if (rc <= 0)
error(EDISK, rc, true);
/* TODO: get this from the NAND flash instead of SD */
fd = open("/ccpmp.bin", O_RDONLY);
if(fd < 0)
return EFILE_NOT_FOUND;
lseek(fd, 4, SEEK_SET);
rc = read(fd, (char*)&len, 4); /* CPU is LE */
if(rc < 4)
return EREAD_IMAGE_FAILED;
len += 8;
printf("Reading %d bytes...", len);
lseek(fd, 0, SEEK_SET);
rc = read(fd, (void*)0x80004000, len);
if(rc < len)
return EREAD_IMAGE_FAILED;
close(fd);
for(i=0; i<len; i++)
checksum += ((unsigned char*)0x80004000)[i];
*((unsigned int*)0x80004000) = checksum;
printf("Starting the OF...");
/* OF requires all clocks on */
__cpm_start_all();
disable_interrupt();
__dcache_writeback_all();
__icache_invalidate_all();
for(i=8000; i>0; i--)
asm volatile("nop\n");
kernel_entry = (void*) 0x80004008;
kernel_entry(0, "Jan 10 2008", "15:34:42"); /* Reversed from the SPL */
return 0; /* Shouldn't happen */
}
void uart_setup_interrupt(uint32_t instance, void (*irq_subroutine)(void), uint8_t state)
{
uint32_t irq_id = UART_IRQS(instance);
if (state == TRUE) {
/* register the IRQ sub-routine */
register_interrupt_routine(irq_id, irq_subroutine);
/* enable the IRQ */
enable_interrupt(irq_id, CPU_0, 0);
} else
/* disable the IRQ */
disable_interrupt(irq_id, CPU_0);
}
void init_timer_interrupt(void)
{
TimerRegs.T16PWM0CMP0DAT.all = 390; //approx 50KHz. by spec//15.6MHz/312=50kHz//[Ken Zhang]change to 40kHz,25us
TimerRegs.T16PWM0CMP1DAT.all = 0xffff;
TimerRegs.T16PWM0CMPCTRL.all = 2;
TimerRegs.T16PWM0CNTCTRL.all = 0x00c;
disable_fast_interrupt(); //make sure fast interrupt is disabled
disable_interrupt();
write_firqpr (0x02000000); //make them all irqs except FAULT_INT
write_reqmask(0x02020000); //enable FAULT_INT and PWM0_INT
enable_interrupt();
enable_fast_interrupt(); //make sure fast interrupt is enabled for OVP shutdown
}
void Timer0Handler (void)
{
enable_interrupt(); /* handles nested interrupt */
T0IR = 1; /* clear interrupt flag */
timer0_counter++;
#ifdef MTHOMAS_MOD
if ( timer0CallbackFunction != NULL ) {
timer0CallbackFunction();
}
#endif
disable_interrupt();
VICVectAddr = 0; /* Acknowledge Interrupt */
}
void power_off(void)
{
#ifdef HAVE_REMOTE_LCD
lcd_remote_off();
#endif
/* Disable interrupts on this core */
disable_interrupt(IRQ_FIQ_STATUS);
/* Mask them on both cores */
CPU_INT_DIS = -1;
COP_INT_DIS = -1;
while (1)
GPIOB_OUTPUT_VAL |= 0x80;
}
int _mtx_trylock(mtx_t * mtx, char * whr)
#endif
{
int ticket;
int retval;
if (MTX_OPT(mtx, MTX_OPT_DINT)) {
cpu_istate = get_interrupt_state();
disable_interrupt();
}
switch (mtx->mtx_type) {
case MTX_TYPE_SPIN:
retval = test_and_set((int *)(&mtx->mtx_lock));
break;
case MTX_TYPE_TICKET:
ticket = atomic_inc(&mtx->ticket.queue);
if (atomic_read(&mtx->ticket.dequeue) == ticket) {
mtx->mtx_lock = 1;
return 0; /* Got it */
} else {
atomic_dec(&mtx->ticket.queue);
if (MTX_OPT(mtx, MTX_OPT_DINT))
set_interrupt_state(cpu_istate);
return 1; /* No luck */
}
break;
default:
MTX_TYPE_NOTSUP();
if (MTX_OPT(mtx, MTX_OPT_DINT))
set_interrupt_state(cpu_istate);
return -ENOTSUP;
}
/* Handle priority ceiling. */
priceil_set(mtx);
#ifdef configLOCK_DEBUG
mtx->mtx_ldebug = whr;
#endif
return retval;
}
void imx233_system_prepare_shutdown(void)
{
/* wait a bit, useful for the user to stop touching anything */
sleep(HZ / 2);
/* disable watchdog just in case since we will disable interrupts */
imx233_rtc_enable_watchdog(false);
/* disable interrupts, it's probably better to avoid any action so close
* to shutdown */
disable_interrupt(IRQ_FIQ_STATUS);
#ifdef SANSA_FUZEPLUS
/* This pin seems to be important to shutdown the hardware properly */
imx233_pinctrl_acquire(0, 9, "power off");
imx233_pinctrl_set_function(0, 9, PINCTRL_FUNCTION_GPIO);
imx233_pinctrl_enable_gpio(0, 9, true);
imx233_pinctrl_set_gpio(0, 9, true);
#endif
}
void epit_setup_interrupt(uint32_t instance, void (*irq_subroutine)(void), bool enableIt)
{
uint32_t irq_id = EPIT_IRQS(instance);
if (enableIt)
{
// register the IRQ sub-routine
register_interrupt_routine(irq_id, irq_subroutine);
// enable the IRQ
enable_interrupt(irq_id, CPU_0, 0);
}
else
{
// disable the IRQ
disable_interrupt(irq_id, CPU_0);
}
}
/*!
* @brief Setup SNVS interrupt.
*
* Enables or disables the related HW module interrupt, and attached the related
* sub-routine into the vector table.
*
* @param port Pointer to the SNVS module structure.
* @param state true to enable or false to disable.
*/
void snvs_srtc_setup_interrupt(void (*irq_subroutine)(void), uint8_t state)
{
uint32_t irq_id = IMX_INT_SNVS;
if (state)
{
// register the IRQ sub-routine
register_interrupt_routine(irq_id, irq_subroutine);
// enable the IRQ
enable_interrupt(irq_id, CPU_0, 0);
}
else
{
// disable the IRQ
disable_interrupt(irq_id, CPU_0);
}
}
//改变蛇的运动方向
void ChangeDir()
{
disable_interrupt();
//寻找已经按下的键，若有多个键按下，处理优先级以此为上下左右
int i;
for(i=0;i<4;i++)
{
if(query_key(i))
switch(i)
{
case 0:snake.dir = up;break;
case 1:snake.dir = down;break;
case 2:snake.dir = left;break;
case 3:snake.dir = right;break;
}
release_key(i);
}
enable_interrupt();
}
void serial_init(gdb_state_t *gdb) {
// Initialize the serial port
int UNUSED error;
error = serial_lock();
gdb_state = gdb;
set_dlab(0); // we always assume the dlab is 0 unless we explicitly change it
disable_interrupt();
disable_fifo();
reset_lcr();
reset_mcr();
clear_iir();
set_baud_rate(BAUD_RATE);
reset_state();
enable_fifo();
enable_interrupt();
clear_iir();
initialise_buffer();
error = serial_unlock();
}
void
play(void) { //主循环
const char *text = "http://cslab.nju.edu.cn/opsystem";
static char buf[2];
int text_len = 32;
int w = SCR_WIDTH / 8;
int color = 0, start_pos = 0, clk = 0;
for (; ; clk = (clk + 1) % 5) { // 主循环是一个死循环
int i;
prepare_buffer(); // 在绘图之前，先需要准备缓冲区
if (clk == 0) {
start_pos = (start_pos + 1) % w;
}
color = (color + 1) % 72;
for (i = 0; i < text_len; i ++) { // 计算每个字符的位置 然后显示在屏幕上
int j = (i + start_pos) % w;
int d = 50 * sin(2 * PI * j / w);
buf[0] = text[i];
draw_string(buf, 8 * j, SCR_HEIGHT / 2 - 4 + d, 32 + color);
}
// 在左下角显示键盘扫描码
draw_string(itoa(last_key), 0, SCR_HEIGHT - 8, live > 0 ? 10: 7);
if (live > 0) live --;
i = HZ / 60;
while (i) {
wait_for_interrupt();
disable_interrupt(); // 关闭中断是为了防止数据竞争(data race)。
if (timers > 0) {
timers --;
i --;
}
enable_interrupt();
}
display_buffer(); // 绘图结束后，调用这个函数将绘制的图像显示到屏幕上
}
}
/**
* Disable the high threshold interrupt
*
* @param ptr to sensor
* @param the Sensor type
*
* @return 0 on success, non-zero on failure
*/
static int
adxl345_sensor_clear_high_thresh(struct sensor *sensor,
sensor_type_t type)
{
struct adxl345 *adxl345;
uint8_t ints_to_disable = ADXL345_INT_ACTIVITY_BIT;
if (type != SENSOR_TYPE_ACCELEROMETER) {
return SYS_EINVAL;
}
adxl345 = (struct adxl345 *)SENSOR_GET_DEVICE(sensor);
/* if neither high or low threshs are now set disable read mask */
if((adxl345->pdd.int_enable & ADXL345_INT_INACTIVITY_BIT) == 0) {
adxl345->pdd.read_ctx.srec_type &= ~type;
adxl345->pdd.registered_mask &= ~ADXL345_READ_MASK;
}
return disable_interrupt(sensor, ints_to_disable);
}
void main(void)
{
disable_interrupt();
clock_init();
/* workaround to wait for LSM9DS0 ready */
clock_delay_usec(60000);
/* serial port */
serial_init();
/* one wire UART based LIN (ULIN) */
ulin_init();
/* real time timer */
rtimer_init();
/* radio configuration */
rf_init(RADIO_CHANNEL);
/* comment this line out to prevent bluetooth board from crashing */
printf("\nSMAC2.0 - [%x:%x]\n", rf_get_short_addr1(), rf_get_short_addr0());
enable_interrupt();
/* module specific initialization - modules.h */
module_init();
/* flash bank used as storage */
flash_bank_select(FLASH_BANK_7);
/* looping services */
while(1)
{
json_service();
serial_service();
ulin_service();
}
}
/*!
* @brief Setup keypad interrupt.
*
* Enables or disables the related HW module interrupt, and attached the related sub-routine
* into the vector table.
*
* @param state Flag indicating whether to enable (true) or disable (false) the interrupt.
*/
void kpp_setup_interrupt(bool state)
{
if (state)
{
// clear status flags and synchronizer chains
kpp_clear_status();
// register the IRQ sub-routine
register_interrupt_routine(IMX_INT_KPP, &kpp_interrupt_routine);
// enable the IRQ
enable_interrupt(IMX_INT_KPP, CPU_0, 0);
}
else
{
// disable the IRQ
disable_interrupt(IMX_INT_KPP, CPU_0);
// clear status flags and synchronizer chains
kpp_clear_status();
}
}
void kernel_panic (const char* fmt, ...) {
/*va_list args;
va_start (args, fmt);
va_end (args);*/
disable_interrupt ();
char* panicMessage="Sorry SeaStar encountered a critical problem and cannot continue\n\
Yeah this is a Kernel Panic. Any unsaved work is lost.\n\
Please restart your computer.\n\n";
kernelClrScr (0x1f);
kernelGotoXY (0,0);
kernelSetColor (0x1f);
kernelPuts (panicMessage);
kernelPrintf ("*** STOP: ");
int i=0;
for(i=0;fmt[i] != '\0';i++)
kernelPrintf ("%c",fmt[i]);
while(1);
}