Solved
After LL_I2C_TransmitData8 the TXE flag keeps 0
I'm using STM32F103RBT6 to connetc to a OLED with I2C1.
The init code is as below.
static void MX_I2C1_Init(void)
{
/* USER CODE BEGIN I2C1_Init 0 */
/* USER CODE END I2C1_Init 0 */
LL_I2C_InitTypeDef I2C_InitStruct = {0};
LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOB);
/**I2C1 GPIO Configuration
PB6 ------> I2C1_SCL
PB7 ------> I2C1_SDA
*/
GPIO_InitStruct.Pin = LL_GPIO_PIN_6|LL_GPIO_PIN_7;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Peripheral clock enable */
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_I2C1);
/* USER CODE BEGIN I2C1_Init 1 */
/* USER CODE END I2C1_Init 1 */
/** I2C Initialization
*/
LL_I2C_DisableOwnAddress2(I2C1);
LL_I2C_DisableGeneralCall(I2C1);
LL_I2C_EnableClockStretching(I2C1);
I2C_InitStruct.PeripheralMode = LL_I2C_MODE_I2C;
I2C_InitStruct.ClockSpeed = 400000;
I2C_InitStruct.DutyCycle = LL_I2C_DUTYCYCLE_2;
I2C_InitStruct.OwnAddress1 = 240;
I2C_InitStruct.TypeAcknowledge = LL_I2C_ACK;
I2C_InitStruct.OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
LL_I2C_Init(I2C1, &I2C_InitStruct);
LL_I2C_SetOwnAddress2(I2C1, 0);
/* USER CODE BEGIN I2C1_Init 2 */
LL_I2C_Enable(I2C1);
/* USER CODE END I2C1_Init 2 */
}The send data code is as below.
/***********************I2C_WriteByte********************************/
void I2C_WriteByte(unsigned char addr,unsigned char data)
{
/* 等待空闲 */
while(LL_I2C_IsActiveFlag_BUSY(I2C1));
/* �?�起始�? EV5,主模�?*/
LL_I2C_GenerateStartCondition(I2C1);
while(!LL_I2C_IsActiveFlag_MSL(I2C1));
//I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT);
/* 设置I2C从器件地�?�，I2C主设备为写模�?*/
LL_I2C_TransmitData8(I2C1,OLED_ADDRESS);
while(!LL_I2C_IsActiveFlag_ADDR(I2C1));
//I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED);
/* 寄存器地�?�*/
LL_I2C_TransmitData8(I2C1,addr);
while (!LL_I2C_IsActiveFlag_TXE(I2C1));
//I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED);
/* �?��?数�?�*/
LL_I2C_TransmitData8(I2C1,data);
while (!LL_I2C_IsActiveFlag_TXE(I2C1));
//I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED);
/* �?�结�?��?*/
LL_I2C_GenerateStopCondition(I2C1);
}After I debug I found the program stucked at Line19.
Could anyone tell me what problem is it? Thank you.
