第一版代码，为了在EEPROM保存参数的时候走STM32的CRC，让Codex修改了一下，现在的效果是无法存储，codex表示原因是CRC方法不同，修改到一半今天的额度使用完了，有待后续解决CRC的bug

Application/app_test.c

@@ -0,0 +1,68 @@
+#include "app_test.h"
+
+uint8_t rx_buf[32];     // RS485 receive buffer
+uint8_t rs_rx_flag = 0; // RS485 receive flag
+uint8_t rs_rx_len;      // RS485 receive length
+
+void app_RS485_test(void)
+{
+    HAL_UARTEx_ReceiveToIdle_IT(&huart3, rx_buf, 32);
+
+    while (1)
+    {
+        if (rs_rx_flag)
+        {
+            debug_printf("RS485 RX Recv (%d bytes): %c %c %c", rs_rx_len, rx_buf[0], rx_buf[1], rx_buf[2]);
+            HAL_UART_Transmit(&huart3, rx_buf, rs_rx_len, 1000);
+            rs_rx_flag = 0;
+        }
+    }
+}
+
+void app_big_laser_test(void)
+{
+    HAL_GPIO_WritePin(POWER_12V_EN_GPIO_Port, POWER_12V_EN_Pin, GPIO_PIN_SET);
+    HAL_TIM_PWM_Start(&htim10, TIM_CHANNEL_1);
+    while (1)
+    {
+        for (uint8_t pulse = 0; pulse < 100; pulse += 10)
+        {
+            __HAL_TIM_SetCompare(&htim10, TIM_CHANNEL_1, pulse);
+            HAL_Delay(10);
+        }
+        for (uint8_t pulse = 100; pulse > 0; pulse -= 10)
+        {
+            __HAL_TIM_SetCompare(&htim10, TIM_CHANNEL_1, pulse);
+            HAL_Delay(10);
+        }
+    }
+}
+
+void app_small_laser_test(void)
+{
+    HAL_GPIO_WritePin(POWER_5V_EN_GPIO_Port, POWER_5V_EN_Pin, GPIO_PIN_SET);
+    HAL_TIM_PWM_Start(&htim10, TIM_CHANNEL_1);
+    while (1)
+    {
+        for (uint8_t pulse = 0; pulse < 100; pulse += 10)
+        {
+            __HAL_TIM_SetCompare(&htim10, TIM_CHANNEL_1, pulse);
+            HAL_Delay(10);
+        }
+        for (uint8_t pulse = 100; pulse > 0; pulse -= 10)
+        {
+            __HAL_TIM_SetCompare(&htim10, TIM_CHANNEL_1, pulse);
+            HAL_Delay(10);
+        }
+    }
+}
+
+void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
+{
+    if (huart->Instance == USART3)
+    {
+        rs_rx_flag = 1;
+        rs_rx_len = Size;
+        HAL_UARTEx_ReceiveToIdle_IT(&huart3, rx_buf, 32);
+    }
+}