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87 lines
2.6 KiB
87 lines
2.6 KiB
#ifndef OWI_H
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#define OWI_H
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#include "r_cg_macrodriver.h"
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#include "r_cg_serial.h"
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#include "r_cg_port.h"
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#include <stdint.h>
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/* =========================================================
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* OWI GPIO: P70 (P7.0) + HW Open-Drain (POM7.0)
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* ========================================================= */
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#define OWI_PORT_P P7 /* port data (read/write latch) */
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#define OWI_PORT_PM PM7 /* port mode (1=input, 0=output) */
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#define OWI_PORT_PU PU7 /* pull-up enable */
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#define OWI_PORT_POM POM7 /* open-drain enable */
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/* P70 = bit0 */
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#define OWI_PIN_MASK (1u << 0)
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/* =========================================================
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* Timing
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* ========================================================= */
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#define OWI_BIT_PERIOD_US 100u
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#define TBIT OWI_BIT_PERIOD_US
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#define TLOW_0 (TBIT * 0.75)
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#define TLOW_1 (TBIT * 0.25)
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#define TSTOP_LOW (TBIT * 2)
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#define TIDLE (TBIT * 3)
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#define TSTART_HOLD 50u
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#define SECURE_HIGH 250u
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#define SECURE_TOGGLE_COUNT 3u
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#define SECURE_TOGGLE_LOW 40u
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#define SECURE_TOGGLE_HIGH 60u
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#ifndef RAM_BYTES
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#define RAM_BYTES 3
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#endif
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#define OWI_IO_MAX_BYTES 64u
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typedef struct {
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uint8_t ok;
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uint8_t timeout;
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uint16_t read_len;
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uint8_t data[OWI_IO_MAX_BYTES];
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uint16_t timeout_byte_index;
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uint8_t timeout_bit_index;
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} owi_io_result_t;
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/* =========================================================
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* API
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* ========================================================= */
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void GPIO_Clear(void);
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void GPIO_Input(void);
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int GPIO_Read(void);
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void OWI_Init(uint32_t bit_time_us);
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void OWI_Start(void);
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void OWI_Stop(void);
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void OWI_SecureStop(void);
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void OWI_WriteBit(int bit);
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void OWI_WriteByte(uint8_t data);
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uint8_t OWI_ReadBit(void);
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uint8_t OWI_ReadByte(void);
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void OWI_T_ReadBytesAndPrint(int length);
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void OWI_ReadBytesAndPrint(int length, uint8_t id);
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void OWI_T_CommandMode(const uint8_t *tx_data, uint8_t tx_len, uint8_t id);
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void OWI_CommandMode (const uint8_t *tx_data, uint8_t tx_len, uint8_t id);
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void OWI_A_CommandMode(const uint8_t *tx_data, uint8_t tx_len, uint8_t id);
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void OWI_T_CommandModeRaw(const uint8_t *tx_data, uint8_t tx_len, uint8_t id, owi_io_result_t *r);
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void OWI_CommandModeRaw (const uint8_t *tx_data, uint8_t tx_len, uint8_t id, owi_io_result_t *r);
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void OWI_ReadBytesRaw (int length, uint8_t id, owi_io_result_t *r);
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void OWI_disable(void);
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void GPIO_ForceHighKick(void);
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uint8_t OWI_HasTimeout(void);
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void OWI_ClearTimeout(void);
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uint16_t OWI_GetLastTimeoutByteIndex(void);
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uint8_t OWI_GetLastTimeoutBitIndex(void);
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#endif /* OWI_H */
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