Part Number: LAUNCHXL-CC2650
Other Parts Discussed in Thread: SYSBIOS, TMP102, CC2650
Tool/software: TI-RTOS
Hello All,
I am using LAUNCHXL-CC2650, and want to use I2C for communicating with an accelerometer,
I am using DIO4 as SCL and DIO5 as SDA,
But i am not able communicate with the accelerometer, i am trying to read "Who AM I" register but not getting any value,
Whereas, when i tried the same with CC2640R2-Launch Pad the communication is done and i am able to read the values of "Who AM I" register of accelerometer
Also i searched for example code of i2c in my LAUNCHXL-CC2650 SDK as well as on TI's resource explorer but i was not able to find any example code for the LAUNCHXL-CC2650,
But the same when i doing with the CC2640R2-Launch Pad i am getting the values.
I have attached the code of I2C communication which i have created using empty project example from SDK, Please check and let me know if any Improvements
Also i have attached the Board file and CC2650LaunchXL.c and .h , please help if any changes needed in these files
/*
* ======== i2ctmp006_cc26xx.c ========
*/
/* XDCtools Header files */
#include <xdc/std.h>
#include <xdc/cfg/global.h>
#include <xdc/runtime/System.h>
/* BIOS Header files */
#include <ti/sysbios/BIOS.h>
#include <ti/sysbios/knl/Task.h>
/* TI-RTOS Header files */
#include <ti/drivers/PIN.h>
#include <ti/drivers/I2C.h>
/* Example/Board Header files */
#include "Board.h"
#define TASKSTACKSIZE 512
Task_Struct tsk0Struct;
UInt8 tsk0Stack[TASKSTACKSIZE];
Task_Handle task;
/*
* ======== echoFxn ========
* Task for this function is created statically. See the project's .cfg file.
*/
Void taskFxn(UArg arg0, UArg arg1)
{
// unsigned int i;
uint16_t temperature = 0;
uint8_t txBuffer[1];
uint8_t rxBuffer[2];
I2C_Handle i2c;
I2C_Params i2cParams;
I2C_Transaction i2cTransaction;
/* Create I2C for usage */
I2C_Params_init(&i2cParams);
i2cParams.bitRate = I2C_400kHz;
i2c = I2C_open(Board_I2C, &i2cParams);
if (i2c == NULL) {
System_abort("Error Initializing I2C\n");
}
else {
System_printf("I2C Initialized!\n");
}
/* Point to the T ambient register and read its 2 bytes */
txBuffer[0] = 0x000F;
i2cTransaction.slaveAddress = 0x1D;
i2cTransaction.writeBuf = txBuffer;
i2cTransaction.writeCount = 1;
i2cTransaction.readBuf = rxBuffer;
i2cTransaction.readCount = 2;
if (I2C_transfer(i2c, &i2cTransaction)) {
/* Extract degrees C from the received data; see TMP102 datasheet */
temperature = rxBuffer[0];
}
/* Deinitialized I2C */
I2C_close(i2c);
System_printf("I2C closed!\n");
System_flush();
}
/*
* ======== main ========
*/
int main(void)
{
Task_Params tskParams;
/* Call board init functions */
Board_initGeneral();
I2C_init();
/* Construct LED Task thread */
Task_Params_init(&tskParams);
tskParams.stackSize = TASKSTACKSIZE;
tskParams.stack = &tsk0Stack;
tskParams.arg0 = 50;
Task_construct(&tsk0Struct, (Task_FuncPtr)taskFxn, &tskParams, NULL);
/* Obtain instance handle */
task = Task_handle(&tsk0Struct);
System_printf("Starting the I2C example\nSystem provider is set to SysMin."
" Halt the target to view any SysMin contents in ROV.\n");
/* SysMin will only print to the console when you call flush or exit */
System_flush();
/* Start BIOS */
BIOS_start();
return (0);
}
//========================
Also i would like to tell that when i put break on "if (I2C_transfer(i2c, &i2cTransaction)) {" and when debug step by step the code directly jumps to "I2C_close(i2c);"
Please check and help me with i2c communication on CC2650-LAUNCHPAD as the earliest.
Thanks and Regards
Utkarsh
