修复SPI通道错误的问题，增加看门狗功能

Robot_V2/sys/initial.cpp

@@ -95,7 +95,6 @@ void GPIO_config(void) {
 	rcu_periph_clock_enable(RCU_GPIOB);
 	// 配置PB2为输入引脚，用于读取电机状态
 	gpio_init(GPIOB, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, GPIO_PIN_2);
-
 }
 
 /* retarget the C library printf function to the USART */
@@ -104,6 +103,21 @@ u8 USART0_init() {
 	return 1;
 }
 
+/*!
+	\brief      configure the watchdog peripheral
+	\param[in]  none
+	\param[out] none
+	\retval     none
+*/
+u8 watchdog_init(u32 time) {
+	u8 status = 0;
+	/* configure FWDGT counter clock: 40KHz(IRC40K) / 64 = 0.625 KHz */
+	/* time = reload_value / clock_frequency */
+	status = fwdgt_config(time * 0.625, FWDGT_PSC_DIV64);
+	fwdgt_enable();
+	return status;
+}
+
 int fputc(int ch, FILE *f) throw() {
 	usart_data_transmit(EVAL_COM0, (uint8_t)ch);
 	while (RESET == usart_flag_get(EVAL_COM0, USART_FLAG_TBE))