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twai_ll_frame_buffer_t union
Syntax
typedef union
{
struct {
struct {
uint8_t dlc: 4;
uint8_t self_reception: 1;
uint8_t single_shot: 1;
uint8_t rtr: 1;
uint8_t frame_format: 1;
};
union {
struct {
uint8_t id[2];
uint8_t data[8];
uint8_t reserved8[2];
} standard;
struct {
uint8_t id[4];
uint8_t data[8];
} extended;
};
};
uint8_t bytes[13];
} __attribute__((packed)) twai_ll_frame_buffer_t;
Fields
Field
Declared as
uint8_t[13]
Related Functions
Found 8 other functions taking a twai_ll_frame_buffer_t
argument:
Function
Description
Copy a frame into the TX buffer and transmit This function copies a formatted TX frame into the TX buffer, and the transmit by setting the correct transmit command (e.g. normal, single shot, self RX) in the command register.
Parse formatted TWAI frame (RX Buffer Layout) into its constituent contents
Format a TWAI Frame This function takes a TWAI message structure (containing ID, DLC, data, and flags) and formats it to match the layout of the TX frame buffer.
Parse a TWAI Frame This function takes a TWAI frame (in the format of the RX frame buffer) and parses it to a TWAI message (containing ID, DLC, data and flags).
Copy a frame from the RX buffer and release This function copies a frame from the RX buffer, then release the buffer (so that it loads the next frame in the RX FIFO). False is returned under the following conditions: - On the ESP32S2, false is returned if the RX buffer points to an overrun frame - On the ESP32, false is returned if the RX buffer points to the first overrun frame in the RX FIFO
Copy a formatted TWAI frame into TX buffer for transmission
Copy a received frame from the RX buffer for parsing
Format contents of a TWAI frame into layout of TX Buffer This function encodes a message into a frame structure. The frame structure has an identical layout to the TX buffer, allowing the frame structure to be directly copied into TX buffer.