I2C testing problem

lpcware — Wed, 15 Jun 2016 17:53:35 GMT

Content originally posted in LPCWare by hoiyin00 on Tue Apr 29 07:32:56 MST 2014
Hi,
I am trying to a test on I2C on LPC1758 MCB1750 board.
I connect the oscilloscope to SDA2 P0.10 on the board with the GND with VIN- on the board.
With the write signal 0x55, it should genearate a square wave on the oscilloscope.
Anyone know why it does not work?

Code
/****************************************************************************
i2cmst.c
/****************************************************************************
#include "lpc17xx.h"
#include "type.h"
#include "i2c.h"
#include "driver.h"

extern volatile uint8_t I2CMasterBuffer[I2C_PORT_NUM][BUFSIZE];
extern volatile uint8_t I2CSlaveBuffer[I2C_PORT_NUM][BUFSIZE];
extern volatile uint32_t I2CReadLength[I2C_PORT_NUM];
extern volatile uint32_t I2CWriteLength[I2C_PORT_NUM];

#define PORT_USED2

/*******************************************************************************
** Main Function main()
*******************************************************************************/
int main (void)
{

SystemClockUpdate();

I2C2Init();/* initialize I2c2 */

while (1)
{
/* Write SLA(W), address and one data byte */
I2CWriteLength[PORT_USED] = 1;
I2CReadLength[PORT_USED] = 0;
I2CMasterBuffer[PORT_USED][0] = 0x55;
I2CEngine( PORT_USED );
}

}

/******************************************************************************
** End Of File
******************************************************************************/

Re: I2C testing problem

lpcware — Wed, 15 Jun 2016 17:53:35 GMT

Content originally posted in LPCWare by embd02161991 on Tue Apr 29 14:38:54 MST 2014
Hi,

Please start by using the I2C example from lpcware.com.

http://www.lpcware.com/content/nxpfile/lpcopen-software-development-platform-lpc17xx-packages

http://www.lpcware.com/content/nxpfile/mcb1700-sample-code-bundle-lpc17xx-peripherals-using-keils-mdk-arm

Thanks,

NXP Technical Support

LPC Microcontrollers中的主题 I2C testing problem

I2C testing problem

Re: I2C testing problem