Merge pull request 'format code' (#3) from feature/mutil_thread into master

Reviewed-on: #3

Core/Src/main.c

@@ -58,7 +58,7 @@ void prosee1(void *data)
     while(1)
     {	
 		__disable_irq();
-		printf("prosee_%d, stack_ptr:%#x\r\n", self->task_id, self->stack_ptr);
+		printf("prosee_id:%d, stack_ptr:%#x\r\n", self->task_id, self->stack_ptr);
 		__enable_irq();
 		HAL_Delay(1000);
     }
@@ -70,7 +70,7 @@ void prosee2(void *data)
     while(1)
     {	
 		__disable_irq();
-		printf("prosee_%d, stack_ptr:%#x\r\n", self->task_id, self->stack_ptr);
+		printf("prosee_id:%d, stack_ptr:%#x\r\n", self->task_id, self->stack_ptr);
 		__enable_irq();
 		HAL_Delay(1000);
     }

thead/src/thread.c

@@ -4,7 +4,6 @@
 #include "usart.h"
 #include "thread.h"
 
-
 /***
 上下文切换的指针，如果触发了上下文切换，则next_task为下一个执行目标。
 ***/
@@ -42,12 +41,9 @@ uint8_t tcb_cunt = 0;
 static uint8_t max_tcb = 0;
 void tcb_scheduler(void)
 {
-	if(tcb_cunt >= 1)
-	{
-		tcb_cunt = -1;
-	}
-	tcb_cunt++;
+    tcb_cunt = tcb_cunt % 2;
     next_task = task[tcb_cunt];
+    tcb_cunt++;
     SCB->ICSR |= SCB_ICSR_PENDSVSET_Msk;
     __DSB();
     __ISB();
@@ -89,5 +85,3 @@ void init_task(tcb_t *tcb, void (*task_entry)(void *), uint8_t *start_stack, voi
         next_task = tcb;
     }
 }
-
-