bool_t bSMBusSequentialRead_NACK(uint8 u8Address, uint8 u8Length, uint8* pu8Data)
{
/* Send address with write bit set */
vAHI_SiMasterWriteSlaveAddr(u8Address, !E_AHI_SI_SLAVE_RW_SET);
vAHI_SiMasterSetCmdReg(E_AHI_SI_START_BIT,
E_AHI_SI_NO_STOP_BIT,
E_AHI_SI_NO_SLAVE_READ,
E_AHI_SI_SLAVE_WRITE,
E_AHI_SI_SEND_ACK,
E_AHI_SI_NO_IRQ_ACK);
if(!bSMBusWait()) return(FALSE);
while(u8Length > 0){
u8Length--;
/*
* If its the last byte to be sent, send with
* stop sequence set
*/
if(u8Length == 0){
vAHI_SiMasterSetCmdReg(E_AHI_SI_NO_START_BIT,
E_AHI_SI_STOP_BIT,
E_AHI_SI_SLAVE_READ,
E_AHI_SI_NO_SLAVE_WRITE,
E_AHI_SI_SEND_NACK,
E_AHI_SI_NO_IRQ_ACK);
} else {
vAHI_SiMasterSetCmdReg(E_AHI_SI_NO_START_BIT,
E_AHI_SI_NO_STOP_BIT,
E_AHI_SI_SLAVE_READ,
E_AHI_SI_NO_SLAVE_WRITE,
E_AHI_SI_SEND_NACK,
E_AHI_SI_NO_IRQ_ACK);
}
while(bAHI_SiMasterPollTransferInProgress()); /* busy wait */
*pu8Data++ = u8AHI_SiMasterReadData8();
}
return(TRUE);
}
/** Read I2C bus.
* @param sendAck if ACK is required
* @param sendStop if STOP required
* @return Result of reading, or negative error code (-7 error in first reading, -9 error in final reading, -8 no ACK for first reading, -10 no ACK for final reading)
*/
uint8 ReadI2C(bool_t sendAck, bool_t sendStop) {
#ifdef I2CDEV_SERIAL_DEBUG
i2cdev_debug_depth++; int z; for(z=0;z<i2cdev_debug_depth;z++) DBG_vPrintf(TRACE_APP, "\t"); DBG_vPrintf(TRACE_APP, "ReadI2C\r\n");
#endif
bool_t check_status;
if (!I2Cdev_enabled) {
i2cdev_debug_depth--;
return -15;
}
bAHI_SiMasterSetCmdReg(E_AHI_SI_NO_START_BIT, sendStop,
E_AHI_SI_SLAVE_READ, E_AHI_SI_NO_SLAVE_WRITE, sendAck,
E_AHI_SI_NO_IRQ_ACK);
check_status = IdleI2C();
if (check_status) {
#ifdef I2CDEV_SERIAL_DEBUG
i2cdev_debug_depth--;
#endif
return -7 - 2*(sendStop == SEND_STOP); // Return -7, or -9 if final reading
}
// Check acknowledge
if ((check_status = bAHI_SiMasterCheckRxNack())) {
#ifdef I2CDEV_SERIAL_DEBUG
i2cdev_debug_depth--;
#endif
return -8 - 2*(sendStop == SEND_STOP); // Return -8, or -10 if final reading
}
uint8 buf = u8AHI_SiMasterReadData8();
#ifdef I2CDEV_SERIAL_DEBUG
i2cdev_debug_depth--;
#endif
return buf;
}
uint8_t TwoWire::requestFrom(uint8_t address, uint8_t quantity, uint8_t sendStop) {
if (quantity > BUFFER_LENGTH)
quantity = BUFFER_LENGTH;
DBG_PRINTF("vAHI_SiMasterWriteSlaveAddr %x\r\n", address);
vAHI_SiMasterWriteSlaveAddr(address, true);
vAHI_SiSetCmdReg(E_AHI_SI_START_BIT, E_AHI_SI_NO_STOP_BIT,
E_AHI_SI_NO_SLAVE_READ, E_AHI_SI_SLAVE_WRITE,
E_AHI_SI_SEND_ACK, E_AHI_SI_NO_IRQ_ACK);
while(bAHI_SiPollTransferInProgress()); /* wait while busy */
// perform blocking read into buffer
int readed = 0;
do {
if(readed == (quantity-1) ) {
vAHI_SiSetCmdReg(E_AHI_SI_NO_START_BIT, E_AHI_SI_STOP_BIT,
E_AHI_SI_SLAVE_READ, E_AHI_SI_NO_SLAVE_WRITE,
E_AHI_SI_SEND_ACK, E_AHI_SI_NO_IRQ_ACK);
}
else {
vAHI_SiSetCmdReg(E_AHI_SI_NO_START_BIT, E_AHI_SI_NO_STOP_BIT,
E_AHI_SI_SLAVE_READ, E_AHI_SI_NO_SLAVE_WRITE,
E_AHI_SI_SEND_ACK, E_AHI_SI_NO_IRQ_ACK);
}
while(bAHI_SiPollTransferInProgress()); /* wait while busy */
rxBuffer[readed++] = u8AHI_SiMasterReadData8();
DBG_PRINTF("u8AHI_SiMasterReadData8 %x\r\n", rxBuffer[readed-1]);
} while (readed < quantity);
// set rx buffer iterator vars
rxBufferIndex = 0;
rxBufferLength = readed;
return readed;
}
/*
* read a buff to I2C
* - i2c_device: i2c device pointer
* - dev_addr: device address
* - data: data buff
* - len: data lenght
* return
*/
uint8 suli_i2c_read(void *i2c_device, uint8 dev_addr, uint8 *buff, uint8 len)
{
vAHI_SiMasterWriteSlaveAddr(dev_addr, TRUE);
// bSetSTA, bSetSTO, bSetRD, bSetWR, bSetAckCtrl, bSetIACK);
bAHI_SiMasterSetCmdReg(TRUE, FALSE, FALSE, TRUE, E_AHI_SI_SEND_ACK, E_AHI_SI_NO_IRQ_ACK);
while(bAHI_SiMasterPollTransferInProgress()); //Waitforanindicationofsuccess
int i;
uint8 *old = buff;
for(i = 0; i < len; i++)
{
if(i == (len - 1)) //should send stop, nack
{
bAHI_SiMasterSetCmdReg(FALSE, TRUE, TRUE, FALSE, E_AHI_SI_SEND_NACK, E_AHI_SI_NO_IRQ_ACK);
} else
{
bAHI_SiMasterSetCmdReg(FALSE, FALSE, TRUE, FALSE, E_AHI_SI_SEND_ACK, E_AHI_SI_NO_IRQ_ACK);
}
while(bAHI_SiMasterPollTransferInProgress()); //Waitforanindicationofsuccess
*buff++ = u8AHI_SiMasterReadData8();
}
return buff - old;
}
