int i2c_master_recv_data(unsigned int addr,
unsigned char *data, unsigned int len)
{
unsigned int i = 0;
int ret = 0;
ret = i2c_set_master(); // get iic bus, as bus master;
if (ret) {
putstring("\nget i2c bus error\n");
return ret; // error while getting bus
}
i2c_enable_irq();
i2c_message_start(addr, 1);
while (1) {
i++;
if (i == len) { // last byte
i2c_disable_ack();
break;
}
*data++ = IICDS;
IICCON &= ~(1 << 4); // resume trasmit
// TODO dealy ??
for (ret = 0; ret < 30; ret++) ; // setup time
}
/* last byte */
*data++ = IICDS;
IICCON &= ~(1 << 4); // resume trasmit
// TODO dealy ??
for (ret = 0; ret < 30; ret++) ; // setup time
return len;
}
inline void i2c_start(I2C_MemMapPtr p)
{
i2c_set_master(p);
i2c_set_tx(p);
}
void i2c_start(I2C_Type *p)
{
i2c_set_master(p);
i2c_set_tx(p);
}
