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software/bootloader/BSP/KEY/key.c

@@ -0,0 +1,38 @@
+#include "key.h"
+#include "delay.h"
+
+void Key_Port_Init(void)
+{
+	GPIO_InitTypeDef GPIO_InitStruct = {0};
+
+	/* GPIO Ports Clock Enable */
+	__HAL_RCC_GPIOA_CLK_ENABLE();
+
+	/*Configure GPIO pin : PA0 */
+	GPIO_InitStruct.Pin = KEYB_PIN;
+	GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+	GPIO_InitStruct.Pull = GPIO_PULLUP;
+	HAL_GPIO_Init(KEYB_PORT, &GPIO_InitStruct);
+
+}
+
+uint8_t KeyScan(uint8_t mode)
+{
+	static uint8_t key_up = 1;
+	uint8_t keyvalue=0;
+	if(mode) key_up = 1;
+	if( key_up && !KEYB)
+	{
+		delay_ms(3);//ensure the key is down
+		if(!KEYB) keyvalue = 1;
+		if(keyvalue) key_up = 0;
+	}
+	else
+	{
+		delay_ms(3);//ensure the key is up
+		if(KEYB)
+			key_up = 1;
+	}
+	return keyvalue;
+}
+