Why I am stuck in I2C_ISR_TXIS flag set?

Using Arduino Programming Questions
1

I have MPU6050 accerlometer, i need to interface with stm32f0 (via I2C).

Firstly i am check if the sensor is responding by reading the

"WHO_AM_I (0x75)" Register.

If the sensor responds with 0x68, this means it’s available and good to go.

but the code is stuck in while(I2C_GetFlagStatus(I2C1, I2C_ISR_TXIS) == RESET){} ,

why this happens?

__inline static void stm32_I2cSetup(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;

#if I2C1_ENABLE_
/* Configure the I2C clock source. The clock is derived from the HSI */
RCC_I2CCLKConfig(RCC_I2C1CLK_HSI);

/* I2C_SCL_GPIO_CLK and I2C_SDA_GPIO_CLK Periph clock enable */
RCC_AHBPeriphClockCmd(I2C1_SCL_GPIO_CLK | I2C1_SDA_GPIO_CLK, ENABLE);

/* I2C Periph clock enable */
RCC_APB1PeriphClockCmd(I2C1_CLK, ENABLE);

/* Connect PXx to I2C_SCL*/
GPIO_PinAFConfig(I2C1_SCL_GPIO_PORT, I2C1_SCL_SOURCE, I2C1_SCL_AF);

/* Connect PXx to I2C_SDA*/
GPIO_PinAFConfig(I2C1_SDA_GPIO_PORT, I2C1_SDA_SOURCE, I2C1_SDA_AF);

/* GPIO configuration /
/ Configure I2C pins: SCL */
GPIO_InitStructure.GPIO_Pin = I2C1_SCL_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(I2C1_SCL_GPIO_PORT, &GPIO_InitStructure);

/* Configure I2C pins: SDA */
GPIO_InitStructure.GPIO_Pin = I2C1_SDA_PIN;
GPIO_Init(I2C1_SDA_GPIO_PORT, &GPIO_InitStructure);

/* I2C configuration /
/ sEE_I2C configuration */
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_AnalogFilter = I2C_AnalogFilter_Enable;
I2C_InitStructure.I2C_DigitalFilter = 0x00;
I2C_InitStructure.I2C_OwnAddress1 = 0x00;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_Timing = I2C1_TIMING;

/* Apply sEE_I2C configuration after enabling it */
I2C_Init(I2C1, &I2C_InitStructure);

/* sEE_I2C Peripheral Enable */
I2C_Cmd(I2C1, ENABLE);

// /* Select the EEPROM address */
// SlaveAddr = 0x60;
Current_I2C = I2C1;
#endif

#if I2C2_ENABLE_

#endif
}

void reg_read(void)
{
uint32_t Data = 0;
printk("~11");

while(I2C_GetFlagStatus(I2C1, I2C_ISR_BUSY) != RESET){;;}
printk("~22");
I2C_TransferHandling(I2C1,0x68, 1, I2C_Reload_Mode, I2C_Generate_Start_Write); //I2C_SoftEnd_Mode
printk("~33");

while(I2C_GetFlagStatus(I2C1, I2C_ISR_TXIS) == RESET){}
printk("~44");
I2C_SendData(I2C1,0x75);
while(I2C_GetFlagStatus(I2C1, I2C_ISR_TC) == RESET){}

I2C_TransferHandling(I2C1, 0x68, 1, I2C_AutoEnd_Mode,I2C_Generate_Start_Read);

while(I2C_GetFlagStatus(I2C1, I2C_ISR_RXNE) == RESET) { }

Data= I2C_ReceiveData(I2C1);

while(I2C_GetFlagStatus(I2C1, I2C_ISR_STOPF) == RESET) {}

I2C_ClearFlag(I2C1, I2C_ICR_STOPCF);

memset(ucGBuff1,0,sizeof(ucGBuff1));
sprintf((char *)ucGBuff1,"C: %d",Data);
printk("~22");
printk((char *)ucGBuff1);

}

2

"printk" ?

You need a pair of these [code][/code] - you're welcome.

3

void printk( char* string)
{
u32 len = strlen(string);

USART_SendData(USART1,(u8 *)string,len);
}

4

@wounder1, it looks like you have 19 Posts here at the forum under your belt. But, you still don't know how to properly post code in line with code tags? Seriously?

Before you do any thing else, READ THIS: Read this before posting a programming question ...

I know it’s kind of a cryptic title. But you should have, you know, read it before posting your programming question. READ IT NOW and pay particular attention to Item #6.

5

I thought maybe we were in kernel-land.

You now need another pair `` - it's a good thing they're so inexpensive.