66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
#ifndef _SSS7_H_
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#define _SSS7_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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enum sss7State {
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SSS7_IDLE,
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SSS7_TX_HEADER,
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SSS7_TX_PAYLOAD,
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SSS7_TX_CRC,
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SSS7_RX_HEADER,
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SSS7_RX_PAYLOAD,
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SSS7_RX_CRC
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};
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const static uint8_t SSS7_HEADER[] = {0xAA, 0xFE};
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const static uint16_t sss7_timeout = 50;
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const static uint16_t sss7_timeout_increment = 1;
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#define SSS7_PAYLOAD_SIZE 16
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#define SSS7_RX_BUFFER_SIZE 2
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extern volatile enum sss7State sss7_state;
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extern volatile uint8_t sss7_tx_failed;
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extern uint8_t sss7_rx_buffer_write;
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extern uint8_t sss7_rx_buffer_read;
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void sss7_process_rx(void);
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void sss7_process_tx(void);
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void sss7_process_ticks(uint16_t ticks);
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extern void uart_put_byte(uint8_t byte);
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extern uint8_t uart_get_byte(void);
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void sss7_init(void);
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static inline uint8_t sss7_can_send(void) {
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return sss7_state == SSS7_IDLE;
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}
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void sss7_send(uint8_t msg[SSS7_PAYLOAD_SIZE]);
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static inline uint8_t sss7_send_failed(void) {
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return sss7_tx_failed;
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}
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static inline uint8_t sss7_has_received(void) {
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return sss7_rx_buffer_read != sss7_rx_buffer_write;
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}
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void sss7_get_received(uint8_t msg[SSS7_PAYLOAD_SIZE]);
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#ifdef __cplusplus
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}
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#endif
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#endif
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