Posted on March 18, 2015 at 11:45
The S stands for start and the Sr for restart.
How do I generate the repeated start condition without stopping and also send ack and check for ack?
I have been using theHAL_I2C_Master_Transmit andHAL_I2C_Master_Receive functions.
My initialization is given below:
Hi everyone,
I am working with a sensor which communicates using i2c. I am very new to stm 32 and could only figure out the basics of the code.I have successfully obtained data from other sensors using i2c. This particular sensor has the following protocol to obtain data.
The S stands for start and the Sr for restart.
How do I generate the repeated start condition without stopping and also send ack and check for ack?
I have been using theHAL_I2C_Master_Transmit andHAL_I2C_Master_Receive functions.
My initialization is given below:
__GPIOB_CLK_ENABLE();
GPIO_i2c.Mode = GPIO_MODE_AF_OD;
GPIO_i2c.Pull = GPIO_PULLUP;
GPIO_i2c.Pin |= GPIO_PIN_6|GPIO_PIN_7;
//GPIO_Uart.Speed = GPIO_SPEED_LOW;
GPIO_i2c.Alternate = GPIO_AF4_I2C1;
HAL_GPIO_Init(GPIOB, &GPIO_i2c);
__I2C1_CLK_ENABLE();
I2cHandle.Instance = I2C1;
I2cHandle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
I2cHandle.Init.ClockSpeed = 400000;
I2cHandle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
I2cHandle.Init.DutyCycle = I2C_DUTYCYCLE_2;
I2cHandle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
I2cHandle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
I2cHandle.Init.OwnAddress1 = 0x30F;HAL_I2C_Master_Transmit(&I2cHandle, (uint16_t)0xB4, (uint8_t*)read1, 1, 10000);
HAL_I2C_Master_Receive(&I2cHandle, (uint16_t)0xB5, (uint8_t *)Buffer1, 3, 10000);
HAL_I2C_Master_Transmit(&I2cHandle, (uint16_t)0x00, (uint8_t*)read2, 3, 10000);
HAL_I2C_Master_Receive(&I2cHandle, (uint16_t)0x01, (uint8_t *)Buffer2, 2, 10000);