stm8s208cb(Slave) and stm8s105c6t6(Master) I2C Communication

[erhan]

Posted on February 05, 2016 at 14:24

Hello,

I want to use I2C communication between stm8s208cb(slave) and stm8s105c6t6(master). I use stm8s standard peripheral library.

stm8s105c6t6(master) code:

-in the void main

CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); //16MHz clock

I2C_Init(400000, 0xA0, I2C_DUTYCYCLE_2, I2C_ACK_CURR, I2C_ADDMODE_7BIT, 16); //i2c init

I2C_Cmd(ENABLE);

I2C_GenerateSTART(ENABLE); //send start condition

I2C_Send7bitAddress(0x30, I2C_DIRECTION_TX); //send slave address for write

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

-in the while(1)

I2C_GenerateSTART(ENABLE);

I2C_SendData(0x61);

I2C_GenerateSTOP(ENABLE);

stm8s208cb(slave) code:

-in the void main

CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); //16MHz System Clock

I2C_DeInit();

I2C_Init(400000, 0x30, I2C_DUTYCYCLE_2, I2C_ACK_CURR, I2C_ADDMODE_7BIT, 16);

I2C_Cmd(ENABLE);

-in the while(1)

uint8_t RxBuffer = I2C_ReceiveData();

But it does not work. Help please, thank you!

#i2c #stm8 #i2c-example

[pkumar1883]

Posted on February 06, 2016 at 10:51

Dear sakarya.erhan,

First debug your master, if it is generating correct waveform for init, start and stopn. You can see the master CLK and DATA pin on CRO or Logic Analyzer.

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