Support sleep

Ubiquitous/XiZi_AIoT/services/app/Makefile

@@ -43,9 +43,9 @@ INC_DIR = 	-I$(KERNEL_ROOT)/services/shell/letter-shell \
 			-I$(KERNEL_ROOT)/services/app 
 
 ifeq ($(BOARD), imx6q-sabrelite)
-all: test_fault simple_client simple_server shell fs_server semaphore_server test_semaphore test_ipc_null test_thread test_irq_hdlr test_irq_block test_irq_send eth_driver epit_server test_net lwip  readme.txt | bin
+all: test_fault simple_client simple_server shell fs_server semaphore_server test_sleep test_semaphore test_ipc_null test_thread test_irq_hdlr test_irq_block test_irq_send eth_driver epit_server test_net lwip  readme.txt | bin
 else 
-all: test_fault simple_client simple_server shell fs_server semaphore_server test_ipc_null test_thread test_semaphore test_net lwip readme.txt eth_hal | bin
+all: test_fault simple_client simple_server shell fs_server semaphore_server test_sleep test_ipc_null test_thread test_semaphore test_net lwip readme.txt eth_hal | bin
 endif
 	../tools/mkfs/mkfs ./fs.img $^
 	@mv $(filter-out readme.txt, $^) bin
@@ -69,6 +69,10 @@ epit_server: timer.o epit.o ccm_pll.o usyscall.o arch_usyscall.o libserial.o pri
 	@${objdump} -S $@ > $@.asm
 endif
 
+test_sleep: test_sleep.o libserial.o printf.o usyscall.o arch_usyscall.o
+	@${ld} ${user_ldflags} -e main -o $@ $^ ${board_specs}
+	@${objdump} -S $@ > $@.asm
+
 test_semaphore: test_semaphore.o libserial.o printf.o usyscall.o arch_usyscall.o
 	@${ld} ${user_ldflags} -e main -o $@ $^ ${board_specs}
 	@${objdump} -S $@ > $@.asm

Ubiquitous/XiZi_AIoT/services/app/test_sleep.c

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2020 AIIT XUOS Lab
+ * XiUOS is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *        http://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+#include "libserial.h"
+#include "usyscall.h"
+
+int main(int argc, char* argv[])
+{
+    while (true) {
+        printf("sleep for 2 seconds\n");
+        sleep(2000);
+    }
+
+    exit(0);
+}

Ubiquitous/XiZi_AIoT/services/lib/usyscall/usyscall.c

@@ -153,4 +153,9 @@ bool semaphore_wait(int sem_id)
 bool semaphore_signal(int sem_id)
 {
     return syscall(SYSCALL_SEMAPHORE, (intptr_t)SYS_SEM_SIGNAL, (intptr_t)sem_id, 0, 0);
+}
+
+int sleep(intptr_t ms)
+{
+    return syscall(SYSCALL_SLEEP, (intptr_t)ms, 0, 0, 0);
 }

Ubiquitous/XiZi_AIoT/services/lib/usyscall/usyscall.h

@@ -34,6 +34,7 @@
 #define SYSCALL_KILL            12  // kill the task by id
 
 #define SYSCALL_SEMAPHORE       13  // semaphore related operations
+#define SYSCALL_SLEEP           14  // sleep
 // clang-format on
 
 typedef enum {
@@ -105,4 +106,6 @@ uintptr_t get_tick();
 int semaphore_new(int val);
 bool semaphore_free(int sem_id);
 bool semaphore_wait(int sem_id);
-bool semaphore_signal(int sem_id);
+bool semaphore_signal(int sem_id);
+
+int sleep(intptr_t ms);