uart_handler.h

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#ifndef INCLUDE_GUARD__UART_HANDLER_H__
#define INCLUDE_GUARD__UART_HANDLER_H__
 
#include "stm32l4xx_hal.h"
#include <stdint.h>
#include "mpi/mpi_types.h"
 
 
typedef enum {
    CAMERA_UART_WRITE_STATE_IDLE,
    CAMERA_UART_WRITE_STATE_HALF_FILLING,
    CAMERA_UART_WRITE_STATE_HALF_FILLED_WAITING_FS_WRITE,
    CAMERA_UART_WRITE_STATE_HALF_WRITTEN_TO_FS
} CAMERA_uart_write_state_enum_t;
 
extern volatile CAMERA_uart_write_state_enum_t CAMERA_uart_half_1_state;
extern volatile CAMERA_uart_write_state_enum_t CAMERA_uart_half_2_state;
 
// Name the UART interfaces
extern UART_HandleTypeDef *UART_telecommand_port_handle;  
extern UART_HandleTypeDef *UART_mpi_port_handle;
extern UART_HandleTypeDef *UART_ax100_port_handle;
extern UART_HandleTypeDef *UART_gnss_port_handle;
extern UART_HandleTypeDef *UART_camera_port_handle;
extern UART_HandleTypeDef *UART_eps_port_handle;
 
extern const uint16_t UART_telecommand_buffer_len;              // Length of the UART telecommand buffer
extern volatile uint8_t UART_telecommand_buffer[];              // Buffer for UART telecommands
extern volatile uint16_t UART_telecommand_buffer_write_idx;     // Write index for UART telecommand buffer
extern volatile uint32_t UART_telecommand_last_write_time_ms;   // Last write time in milliseconds for UART telecommand
 
extern const uint16_t UART_mpi_buffer_len;                      // Length of the MPI response buffer (for telecommand responses only & NOT SCIENCE DATA)
extern volatile uint8_t UART_mpi_buffer[];                      // Buffer for MPI response
extern volatile uint16_t UART_mpi_buffer_write_idx;             // Write index for MPI response buffer
extern volatile uint32_t UART_mpi_last_write_time_ms;           // Last write time in milliseconds for MPI response
extern volatile uint8_t UART_mpi_last_rx_byte;                  // Last received byte from the MPI response
 
extern volatile uint32_t UART_ax100_last_write_time_ms;       // Last write time in milliseconds for AX100 response
 
extern const uint16_t UART_gnss_buffer_len;                      // Length of the GNSS response buffer
extern volatile uint8_t UART_gnss_buffer[];                      // Buffer for GNSS response
extern volatile uint16_t UART_gnss_buffer_write_idx;             // Write index for GNSS response buffer
extern volatile uint32_t UART_gnss_last_write_time_ms;           // Last write time in milliseconds for GNSS response
 
extern const uint16_t UART_camera_dma_buffer_len;               // Length of the CAMERA DMA buffer
extern const uint16_t UART_camera_dma_buffer_len_half;          // Half length of the CAMERA DMA buffer
extern volatile uint8_t UART_camera_dma_buffer[];               // Buffer for CAMERA UART response
extern volatile uint8_t UART_camera_pending_fs_write_half_1_buf[];
extern volatile uint8_t UART_camera_pending_fs_write_half_2_buf[];
extern volatile uint32_t UART_camera_last_write_time_ms;        // Last write time in milliseconds for CAMERA response
 
extern const uint16_t UART_eps_buffer_len;                      // Length of the EPS response buffer
extern volatile uint8_t UART_eps_buffer[];                      // Buffer for EPS response
extern volatile uint16_t UART_eps_buffer_write_idx;             // Write index for EPS response buffer
extern volatile uint32_t UART_eps_last_write_time_ms;           // Last write time in milliseconds for EPS response
extern volatile uint8_t UART_eps_is_expecting_data;             // Set to 1 when a command is sent, and we're awaiting a response
 
extern const uint16_t UART_gnss_buffer_len; 
extern volatile uint8_t UART_gnss_buffer[];          
extern volatile uint16_t UART_gnss_buffer_write_idx; 
extern volatile uint32_t UART_gnss_last_write_time_ms; 
extern volatile uint8_t UART_gnss_buffer_last_rx_byte;  
extern volatile uint8_t UART_gnss_uart_interrupt_enabled; // Flag to enable or disable the UART GNSS ISR
 
// UART MPI Science data buffers.
extern const uint8_t UART_mpi_rx_dma_buffer_len;
extern volatile uint8_t UART_mpi_rx_dma_buffer[];
extern const uint16_t MPI_science_buffer_len;
extern volatile uint8_t MPI_science_buffer_one[];
extern volatile uint8_t MPI_science_buffer_two[];
 
extern volatile MPI_buffer_state_enum_t MPI_buffer_one_state;
extern volatile MPI_buffer_state_enum_t MPI_buffer_two_state;
 
extern volatile uint32_t MPI_buffer_one_last_filled_uptime_ms;
extern volatile uint32_t MPI_buffer_two_last_filled_uptime_ms;
 
 
#define AX100_MAX_KISS_FRAMES_IN_RX_QUEUE  8
#define AX100_MAX_KISS_FRAME_SIZE_BYTES    500 // Could be as low as 256, probably.
 
typedef struct {
    uint8_t data[AX100_MAX_KISS_FRAME_SIZE_BYTES];
    uint16_t len;
} AX100_kiss_frame_struct_t;
 
extern volatile AX100_kiss_frame_struct_t UART_AX100_kiss_frame_queue[AX100_MAX_KISS_FRAMES_IN_RX_QUEUE];
extern volatile uint8_t UART_AX100_kiss_frame_queue_head;
extern volatile uint8_t UART_AX100_kiss_frame_queue_tail;
 
 
 
void UART_init_uart_handlers(void);
void GNSS_set_uart_interrupt_state(uint8_t new_enabled) ;
uint8_t CAMERA_set_expecting_data(uint8_t new_enabled) ;
 
#endif // INCLUDE_GUARD__UART_HANDLER_H__