JN5168 I2C Communication Example Code

xview — Sat, 11 Jun 2016 08:08:11 GMT

Dear Friends,

Does anyone have I2C example code of JN5168? I used JN5168 connecting to a MMA8451Q accelerometer sensor, but it response nothing. Thank you.

Xview

Re: JN5168 I2C Communication Example Code

alfredochoperen — Wed, 15 Jun 2016 16:59:15 GMT

The following is used with a RTC chip. Feel free to adapt.:

/****************************************************************************

* NAME: vI2C_Read

* DESCRIPTION: I2C read function

* PARAMETERS: Name RW Usage

* u8 Address R Address of desired byte in the RTC

* pau8ReadBuffer R pointer to data buffer

* ui8Length R number of bytes to read

* RETURNS: Nothing

* None.

* NOTES:

* None.

****************************************************************************/

PUBLIC uint8 vI2C_Read(uint8 u8SlaveAddress, uint8 u8RegisterAddress,

uint8 *u8ReadBuffer, uint8 ui8Length)

{

uint8 i=0;

// DBG_vPrintf(TRACE_I2C, "I2C_Read::Start - I2C: %x, Reg: %d, Len: %d\n",

// u8SlaveAddress, u8RegisterAddress, ui8Length);

// set slave address

vAHI_SiMasterWriteSlaveAddr(u8SlaveAddress >> 1, FALSE);

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);

while(bAHI_SiMasterPollTransferInProgress()); // wait while busy

// DBG_vPrintf(TRACE_I2C, "I2C_Read:: Setting register address\n");

vAHI_SiMasterWriteData8(u8RegisterAddress); // RTC address to read from

vAHI_SiMasterSetCmdReg(E_AHI_SI_NO_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_SiMasterPollTransferInProgress()); // wait while busy

/* check to see if we get an ACK back*/

if(bAHI_SiMasterCheckRxNack())

{

return (1);

}

/* check to see if anyone else has taken the bus */

if(bAHI_SiMasterPollArbitrationLost())

{

return (2);

}

vAHI_SiMasterWriteSlaveAddr(u8SlaveAddress >> 1,TRUE);

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);

while(bAHI_SiMasterPollTransferInProgress()); // wait while busy

// DBG_vPrintf(TRACE_I2C, "I2C_Read:: Reading data\n");

// now we read data from the RTC

while(ui8Length > 0x00)

{

if(ui8Length < 0x02) /* is it the last byte */

{

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_ACK,

E_AHI_SI_NO_IRQ_ACK);

}

while(bAHI_SiMasterPollTransferInProgress()); // wait while busy

u8ReadBuffer[i++] = u8AHI_SiMasterReadData8();

ui8Length--;

}

return (0);

}

/****************************************************************************

* NAME: vI2C_Write

* DESCRIPTION:

* PARAMETERS: Name RW Usage

* None.

* RETURNS:

* None.

* NOTES:

* None.

****************************************************************************/

PUBLIC uint8 vI2C_Write(uint8 u8SlaveAddress, uint8 u8RegisterAddress,

uint8 *u8WriteBuffer, uint8 ui8Length)

{

uint8 i=0;

// set slave address

vAHI_SiMasterWriteSlaveAddr(u8SlaveAddress >> 1,FALSE);

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);

while(bAHI_SiMasterPollTransferInProgress()); // wait while busy

/* check to see if we get an ACK back*/

if(bAHI_SiMasterCheckRxNack())

{

return (1);

}

/* check to see if anyone else has taken the bus */

if(bAHI_SiMasterPollArbitrationLost())

{

return (2);

}

vAHI_SiMasterWriteData8(u8RegisterAddress); // address to write

vAHI_SiMasterSetCmdReg(E_AHI_SI_NO_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_SiMasterPollTransferInProgress()); // wait while busy

/* check to see if we get an ACK back*/

if(bAHI_SiMasterCheckRxNack())

{

return (3);

}

/* check to see if anyone else has taken the bus */

if(bAHI_SiMasterPollArbitrationLost())

{

return (4);

}

// now we write data to the RTC

while(ui8Length > 0x00)

{

/* data to write */

vAHI_SiWriteData8(u8WriteBuffer[i++]);

if(ui8Length < 2) /* is it the last byte */

{

vAHI_SiMasterSetCmdReg(E_AHI_SI_NO_START_BIT,

E_AHI_SI_STOP_BIT,

E_AHI_SI_NO_SLAVE_READ,

E_AHI_SI_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_NO_SLAVE_READ,

E_AHI_SI_SLAVE_WRITE,

E_AHI_SI_SEND_ACK,

E_AHI_SI_NO_IRQ_ACK);

}

ui8Length--;

while(bAHI_SiMasterPollTransferInProgress()); /* wait while busy */

/* check to see if we get an ACK back*/

if(bAHI_SiMasterCheckRxNack())

{

return(5);

}

/* check to see if anyone else has taken the bus */

if(bAHI_SiMasterPollArbitrationLost())

{

return(6);

}

return (0);

}

Re: JN5168 I2C Communication Example Code

dheerajsawant — Fri, 20 Oct 2017 10:57:35 GMT

Hello @Alfredo Choperena,

i am little bit familiar with JN5168 codes. i am going by step by step to achieve main goal.

i worked with DIO,ADC,TickTimer.

right now i am working with I2C.

I am stuck in I2C communication of JN5168 with SHT31 -DIS-B.

Need Your suggestion.

Thank You For your Time!

Re: JN5168 I2C Communication Example Code

dheerajsawant — Wed, 25 Oct 2017 05:23:28 GMT

Hello davidashraf‌ dereksnell‌,

I AM stuck at a point..

i am using JN-AN-1162 application note.

in that i am using DeviceRemote.c file

in that main loop is present but that main loop restart after 20sec my i2c is not working because of that.

i am interfacing JN5168 with SHT31-DIS-B. its showing me output but not showing proper Heater Enable and Disable status

please help...

Thank you for your time

Re: JN5168 I2C Communication Example Code

dheerajsawant — Wed, 25 Oct 2017 06:55:32 GMT

Hello Sir,

i have attached photo copy. in that APPmainloop() says in non control mode program executes repedately and in control mode it will execute only one time.

and this main loop restart after 20 sec i don't understand how to stop this.

My I2C is not working because of this..

i am checking pulses its showing as per protocol but output is not showing proper. please need help

i think restart is my issue.

please suggest related to this problem..

thank You for your time!

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