kopia lustrzana https://github.com/UU5JPP/Wolf-LITE
61 wiersze
1.9 KiB
C
61 wiersze
1.9 KiB
C
#ifndef WIRE_h
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#define WIRE_h
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#include "main.h"
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#include "stm32f4xx_hal.h"
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#include "stm32f4xx_hal_gpio.h"
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#include <stdbool.h>
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#define WIRE_BUFSIZ 101
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/* return codes from endTransmission() */
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#define SUCCESS 0 /* transmission was successful */
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#define EDATA 1 /* too much data */
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#define ENACKADDR 2 /* received nack on transmit of address */
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#define ENACKTRNS 3 /* received nack on transmit of data */
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#define EOTHER 4 /* other error */
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#define I2C_WRITE 0
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#define I2C_READ 1
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#define I2C_DELAY \
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for (uint32_t wait_i = 0; wait_i < 300; wait_i++) \
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{ \
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__asm("nop"); \
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};
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typedef struct
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{
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GPIO_TypeDef *SDA_PORT;
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uint16_t SDA_PIN;
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GPIO_TypeDef *SCK_PORT;
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uint16_t SCK_PIN;
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uint8_t i2c_tx_addr; /* address transmitting to */
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uint8_t i2c_tx_buf[WIRE_BUFSIZ]; /* transmit buffer */
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uint8_t i2c_tx_buf_idx; /* next idx available in tx_buf, -1 overflow */
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bool i2c_tx_buf_overflow;
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} I2C_DEVICE;
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extern I2C_DEVICE I2C_WM8731;
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#ifdef HAS_TOUCHPAD
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extern I2C_DEVICE I2C_TOUCHPAD;
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#endif
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#define SDA_SET HAL_GPIO_WritePin(dev->SDA_PORT, dev->SDA_PIN, GPIO_PIN_SET)
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#define SCK_SET HAL_GPIO_WritePin(dev->SCK_PORT, dev->SCK_PIN, GPIO_PIN_SET)
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#define SDA_CLR HAL_GPIO_WritePin(dev->SDA_PORT, dev->SDA_PIN, GPIO_PIN_RESET)
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#define SCK_CLR HAL_GPIO_WritePin(dev->SCK_PORT, dev->SCK_PIN, GPIO_PIN_RESET)
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extern void i2c_begin(I2C_DEVICE *dev);
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extern void i2c_beginTransmission_u8(I2C_DEVICE *dev, uint8_t);
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extern void i2c_write_u8(I2C_DEVICE *dev, uint8_t);
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extern void i2c_shift_out(I2C_DEVICE *dev, uint8_t val);
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extern void i2c_start(I2C_DEVICE *dev);
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extern void i2c_stop(I2C_DEVICE *dev);
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extern bool i2c_get_ack(I2C_DEVICE *dev);
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extern bool i2c_beginReceive_u8(I2C_DEVICE *dev, uint8_t slave_address);
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extern uint8_t i2c_Read_Byte(I2C_DEVICE *dev, uint8_t ack);
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extern uint8_t i2c_endTransmission(I2C_DEVICE *dev);
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#endif
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