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[/] [minsoc/] [trunk/] [sw/] [drivers/] [i2c.h] - Blame information for rev 53

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Line No. Rev Author Line
1 36 rfajardo
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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19 53 ConX.
 
20 36 rfajardo
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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28 53 ConX.
#define I2C_BUF_LEN             10
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#define I2C_PRESC_LO            0x00
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#define I2C_PRESC_HI            0x01
31 36 rfajardo
 
32 53 ConX.
#define I2C_CTR                 0x02
33 36 rfajardo
 
34 53 ConX.
#define I2C_TXR                 0x03
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#define I2C_RXR                 0x03
36 36 rfajardo
 
37 53 ConX.
#define I2C_CR                  0x04
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#define I2C_SR                  0x04
39 36 rfajardo
 
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//BITS
41 53 ConX.
#define I2C_CTR_EN              0x80
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#define I2C_CTR_IRQ_EN          0x40
43 36 rfajardo
 
44 53 ConX.
#define I2C_TXR_ADR             0xFE
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#define I2C_TXR_W               0x00
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#define I2C_TXR_R               0x01
47 36 rfajardo
 
48 53 ConX.
#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
55 36 rfajardo
 
56 53 ConX.
#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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