Preston Ernst
/
mirror_actuator_VT
-data logging revision
sw_fifo.hpp
- Committer:
- ernstpre
- Date:
- 2021-08-05
- Revision:
- 1:25a2b47ca291
File content as of revision 1:25a2b47ca291:
#define FIFO_BUFFER_SIZE 128 // software buffer size (in bytes) // UART data transmit function // - checks if there's room in the transmit sw buffer // - if there's room, it transfers data byte to sw buffer // - automatically handles "uart_tx_buffer_full_flag" // - sets the overflow flag upon software buffer overflow (doesn't overwrite existing data) // - if this is the first data byte in the buffer, it enables the "hw buffer empty" interrupt void uart_send_byte(uint8_t byte); // UART data receive function // - checks if data exists in the receive sw buffer // - if data exists, it returns the oldest element contained in the buffer // - automatically handles "uart_rx_buffer_full_flag" // - if no data exists, it clears the uart_rx_flag uint8_t uart_get_byte(void); volatile extern uint8_t uart_rx_fifo_not_empty_flag; // this flag is automatically set and cleared by the software buffer volatile extern uint8_t uart_rx_fifo_full_flag; // this flag is automatically set and cleared by the software buffer volatile extern uint8_t uart_rx_fifo_ovf_flag; // this flag is not automatically cleared by the software buffer volatile extern uint8_t uart_tx_fifo_full_flag; // this flag is automatically set and cleared by the software buffer volatile extern uint8_t uart_tx_fifo_ovf_flag; // this flag is not automatically cleared by the software buffer volatile extern uint8_t uart_tx_fifo_not_empty_flag; // this flag is automatically set and cleared by the software buffer