2022-05-27 00:11:56 +02:00
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#ifndef __RPI_H
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#define __RPI_H
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#include "stm32g4xx_hal.h"
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2022-05-27 17:20:16 +02:00
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#include <stddef.h>
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2022-05-27 00:11:56 +02:00
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// We only need to receive one byte (command ID)
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#define I2C_RX_BUF_SIZE 1
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extern uint8_t i2c_rx_buf[I2C_RX_BUF_SIZE];
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// We always send the maximum 32 byes supported by an SMBus block read
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#define I2C_TX_BUF_MAX_SIZE 32
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extern uint8_t i2c_tx_buf[I2C_TX_BUF_MAX_SIZE];
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extern uint8_t i2c_tx_len;
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#define COMM_SEND_DATA 0x00
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typedef enum {
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RPI_I2C_IDLE,
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RPI_I2C_WAITING_FOR_COMMAND,
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RPI_I2C_WAITING_FOR_MASTER_RECEIVE,
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RPI_I2C_SENDING_DATA_SIZE,
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RPI_I2C_SENDING_DATA
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} RPiI2CState;
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extern RPiI2CState rpi_i2c_state;
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2022-05-27 17:20:16 +02:00
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extern size_t rpi_num_polls;
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2022-05-27 00:11:56 +02:00
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void rpi_init(I2C_HandleTypeDef *handle);
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2022-05-27 17:20:16 +02:00
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void rpi_update_tx_buffer();
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2022-05-27 00:11:56 +02:00
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#endif // __RPI_H
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