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[/] [minsoc/] [trunk/] [sw/] [drivers/] [i2c.h] - Rev 46
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struct i2c_type { unsigned char address; unsigned char pointer; unsigned short data; }; struct i2c_mode { unsigned char read_write; unsigned char byte_word; unsigned char ptr_set; }; typedef struct i2c_type i2c_type; typedef struct i2c_mode i2c_mode; #define I2C_BUF_LEN 10 void i2c_init(void); void i2c_irq(void); i2c_type * i2c_get(void); //return pointer to first non read received data void i2c_set_ack_lvl(int ack_lvl, int final_ack_lvl); int i2c_trans(i2c_mode * mode, i2c_type * data); //return (-1) or length (still processing previous) or asserted #define I2C_PRESC_LO 0x00 #define I2C_PRESC_HI 0x01 #define I2C_CTR 0x02 #define I2C_TXR 0x03 #define I2C_RXR 0x03 #define I2C_CR 0x04 #define I2C_SR 0x04 //BITS #define I2C_CTR_EN 0x80 #define I2C_CTR_IRQ_EN 0x40 #define I2C_TXR_ADR 0xFE #define I2C_TXR_W 0x00 #define I2C_TXR_R 0x01 #define I2C_CR_STA 0x80 #define I2C_CR_STO 0x40 #define I2C_CR_RD 0x20 #define I2C_CR_WR 0x10 #define I2C_CR_ACK 0x00 #define I2C_CR_NACK 0x08 #define I2C_CR_CLR_IRQ 0x01 #define I2C_SR_R_ACK 0x80 #define I2C_SR_BUSY 0x40 #define I2C_SR_ARB_LOST 0x20 #define I2C_SR_TX_BUSY 0x02 #define I2C_SR_IRQ_FLAG 0x01
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