/**********************************
 * 文件名称: uart_communication.h
 * 功能描述: 串口通信头文件
 **********************************/
#ifndef __UART_COMMUNICATION_H_
#define __UART_COMMUNICATION_H_


//============================== UART 通信配置 ==============================
// USART1 使用 PB6(TX)和PB7(RX)

// 串口选择
#define UART_COMM               USART1
#define UART_COMM_CLK           RCC_APB2Periph_USART1
#define UART_COMM_IRQ           USART1_IRQn

// TX 引脚 (PB6)
#define UART_COMM_TX_PIN        GPIO_Pin_6
#define UART_COMM_TX_GPIO_PORT  GPIOB
#define UART_COMM_TX_GPIO_CLK   RCC_AHB1Periph_GPIOB
#define UART_COMM_TX_SOURCE     GPIO_PinSource6
#define UART_COMM_TX_AF         GPIO_AF_USART1

// RX 引脚 (PB7)
#define UART_COMM_RX_PIN        GPIO_Pin_7
#define UART_COMM_RX_GPIO_PORT  GPIOB
#define UART_COMM_RX_GPIO_CLK   RCC_AHB1Periph_GPIOB
#define UART_COMM_RX_SOURCE     GPIO_PinSource7
#define UART_COMM_RX_AF         GPIO_AF_USART1

// 波特率
#define UART_BAUDRATE           2000000

// 发送接收缓冲区大小
#define UART_BUFFER_SIZE        256

// DMA 配置
#define UART_DMA_TX_STREAM      DMA2_Stream7
#define UART_DMA_TX_CHANNEL     DMA_Channel_4
#define UART_DMA_TX_IRQn        DMA2_Stream7_IRQn
#define UART_DMA_TX_IRQHandler  DMA2_Stream7_IRQHandler

#define UART_DMA_RX_STREAM      DMA2_Stream5
#define UART_DMA_RX_CHANNEL     DMA_Channel_4
#define UART_DMA_RX_IRQn        DMA2_Stream5_IRQn
#define UART_DMA_RX_IRQHandler  DMA2_Stream5_IRQHandler

#define UART_DMA_CLK            RCC_AHB1Periph_DMA2

// 全局变量声明
extern volatile uint16_t com1_rx_len;
extern volatile uint8_t com1_recv_end_flag;
extern uint8_t com1_rx_buffer[];
extern uint8_t DMA_USART1_TX_BUF[];

// 函数声明
extern void uart_communication_init(void);
extern void uart_send_data(uint8_t *data, uint16_t length);
extern void uart_send_float(float value);
extern void uart_send_int(int32_t value);
extern void uart_send_char(uint8_t ch);
extern void uart_send_string(char *str);
extern void DMA_USART_COMM_Send(uint8_t *data, uint16_t size);
extern uint8_t uart_is_data_available(void);
extern uint16_t uart_get_received_data(uint8_t *buffer, uint16_t max_len);

#endif /* __UART_COMMUNICATION_H_ */