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[/] [minsoc/] [trunk/] [sw/] [drivers/] [i2c.h] - Blame information for rev 36

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Line No. Rev Author Line
1 36 rfajardo
 
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struct i2c_type
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{
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    unsigned char address;
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    unsigned char pointer;
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    unsigned short data;
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};
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struct i2c_mode
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{
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    unsigned char read_write;
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    unsigned char byte_word;
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    unsigned char ptr_set;
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};
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typedef struct i2c_type i2c_type;
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typedef struct i2c_mode i2c_mode;
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#define I2C_BUF_LEN     10
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void i2c_init(void);
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void i2c_irq(void);
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i2c_type * i2c_get(void);                           //return pointer to first non read received data
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void i2c_set_ack_lvl(int ack_lvl, int final_ack_lvl);
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int i2c_trans(i2c_mode * mode, i2c_type * data);   //return (-1) or length (still processing previous) or asserted
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#define I2C_PRESC_LO     0x00
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#define I2C_PRESC_HI     0x01
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#define I2C_CTR          0x02
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#define I2C_TXR          0x03
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#define I2C_RXR          0x03
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#define I2C_CR           0x04
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#define I2C_SR           0x04
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//BITS
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#define I2C_CTR_EN        0x80
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#define I2C_CTR_IRQ_EN    0x40
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#define I2C_TXR_ADR      0xFE
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#define I2C_TXR_W        0x00
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#define I2C_TXR_R        0x01
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#define I2C_CR_STA       0x80
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#define I2C_CR_STO       0x40
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#define I2C_CR_RD        0x20
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#define I2C_CR_WR        0x10
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#define I2C_CR_ACK       0x00
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#define I2C_CR_NACK      0x08
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#define I2C_CR_CLR_IRQ   0x01
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#define I2C_SR_R_ACK     0x80
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#define I2C_SR_BUSY      0x40
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#define I2C_SR_ARB_LOST  0x20
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#define I2C_SR_TX_BUSY   0x02
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#define I2C_SR_IRQ_FLAG  0x01
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