void portableCommonAckI2C(I2cBusConnection* i2cBusConnection) {
I2cBus* i2cBus = i2cBusConnection->i2cBus;
if (i2cBus == NULL) {
AckI2C1();
}
else {
I2C_MODULE i2cModule = getI2C_MODULE(i2cBus->port);
I2CAcknowledgeByte(i2cModule, true);
}
}
void I2C_ReadFromReg_Burst(uint8_t address, uint8_t deviceRegister, uint8_t* data, uint8_t burstNum)
{
// Assert the start condition
StartI2C1();
while (I2C1CONbits.SEN);
// Send the 7-bit device address
MasterWriteI2C1(address << 1);
while (I2C1STATbits.TBF); // 8 clock cycles
while (!IFS1bits.MI2C1IF); // Wait for 9th clock cycle
IFS1bits.MI2C1IF = 0; // Clear interrupt flag
// Send the register address
MasterWriteI2C1(deviceRegister);
while (I2C1STATbits.TBF); // 8 clock cycles
while (!IFS1bits.MI2C1IF); // Wait for 9th clock cycle
IFS1bits.MI2C1IF = 0; // Clear interrupt flag
// Start a new I2C transaction
RestartI2C1();
while (I2C1CONbits.RSEN);
// Send the second address
MasterWriteI2C1((address << 1) + 1);
while (I2C1STATbits.TBF); // 8 clock cycles
while (!IFS1bits.MI2C1IF); // Wait for 9th clock cycle
IFS1bits.MI2C1IF = 0; // Clear interrupt flag
// Read the data
data[0] = MasterReadI2C1();
if (burstNum > 1) {
uint8_t i;
for (i = 1; i < burstNum; i++) {
AckI2C1();
while (I2C1CONbits.ACKEN == 1);
data[i] = MasterReadI2C1();
}
}
// No need to ack reception of this data
NotAckI2C1();
while (I2C1CONbits.ACKEN == 1);
// Stop the I2C transaction
StopI2C1();
while (I2C1CONbits.PEN);
// Go idle on the bus
IdleI2C1();
}
int RcvData2(unsigned int address){
rcv = 0;
StartI2C1(); //Send line start condition
IdleI2C1(); //Wait to complete
MasterWriteI2C1((address << 1) | 1); //Write out slave address OR 1 (read command)
IdleI2C1(); //Wait to complete
rcv = MasterReadI2C1()<<8; //Read in a value
AckI2C1();
rcv |= MasterReadI2C1();
StopI2C1(); //Send line stop condition
IdleI2C1(); //Wait co complete
return rcv; //Return read value
}
int8_t I2C1dev_readBytes(uint8_t devAddr, uint8_t regAddr, uint8_t length, uint8_t *data) {
count_accel = 0;
// S
IdleI2C1();
StartI2C1();
// Device write address
IdleI2C1();
WriteI2C1(devAddr << 1 | 0x00);
// Register address
IdleI2C1();
WriteI2C1(regAddr);
// R
IdleI2C1();
RestartI2C1();
// Device read address
IdleI2C1();
WriteI2C1(devAddr << 1 | 0x01);
for (count_accel = 0; count_accel < length; count_accel++) {
// Data byte
IdleI2C1();
data[count_accel] = ReadI2C1();
if (count_accel == length - 1) {
// NACK
IdleI2C1();
NotAckI2C1();
} else {
// ACK
IdleI2C1();
AckI2C1();
}
}
// P
IdleI2C1();
StopI2C1();
return count_accel;
}
uint8_t
mti_tcn75a_get_temperature(int32_t *result)
{
uint16_t tmp;
uint8_t rc;
uint8_t tmp_lsb = 4;
uint8_t tmp_msb = 2;
/* start */
StartI2C1();
/* send slave address (write) */
rc = WriteI2C1(0b10010000);
if (rc != 0x00) {
rc = CH_ERROR_I2C_SLAVE_ADDRESS;
goto out;
}
/* set ambient temperature pointer */
rc = WriteI2C1(0b00000000);
/* reset the bus */
RestartI2C1();
/* send slave address (read) */
WriteI2C1(0b10010001);
/* read the temperature */
tmp_msb = ReadI2C1();
AckI2C1();
tmp_lsb = ReadI2C1();
NotAckI2C1();
/* stop */
StopI2C1();
/* format result */
*result = (((int32_t) tmp_msb) << 16) + (((int32_t) tmp_lsb) << 8);
out:
return rc;
}
