Posted on November 27, 2011 at 23:03Hello. I want to setup ADXL345(SDA - PC3, SCL - PC2)
I didn't find any information about my problem in the internet.
How I init I2C:
void I2CG_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;
// GPIOB clock enable
RCC_AHBPeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
// I2CG clock enable
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2CG, ENABLE);
// I2CG SDA and SCL configuration
GPIO_InitStructure.GPIO_Pin = SCL|SDA;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
// Enable I2CG reset state
RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2CG, ENABLE);
// Release I2CG from reset state
RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2CG, DISABLE);
// I2CG configuration
I2C_DeInit(I2CG);
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_16_9;
I2C_InitStructure.I2C_OwnAddress1 = 1;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = ClockSpeed;
I2C_Init(I2CG, &I2C_InitStructure);
I2C_Cmd(I2CG, ENABLE);
I2C_AcknowledgeConfig(I2CG, ENABLE);
}
This step seems to be successful.
Then I try to init ADXL345:
void ADXL_Init(void)
//Turn on
{
I2C_ByteWrite(0x00, 0x2d);
I2C_ByteWrite(0x16,
0x2d
);
I2C_ByteWrite(0x08,
0x2d
);
}
And get error checking ''
I2C_CheckEvent''//status = ERROR;
void I2C_ByteWrite(uint8_t val, uint8_t Addr)
{
I2C_GenerateSTART(I2CG, ENABLE); // Send START condition
while(!I2C_CheckEvent(I2CG, I2C_EVENT_MASTER_MODE_SELECT)); //
Stuck at this I2C_Send7bitAddress(I2CG, DEV_ADDR, I2C_Direction_Transmitter); // Send address for write
while(!I2C_CheckEvent(I2CG, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)); // Test on EV6 and clear it
I2C_SendData(I2CG, Addr); // Send the internal address to write
while(!I2C_CheckEvent(I2CG, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); // Test on EV8 and clear it
I2C_SendData(I2CG, val);
while (!I2C_CheckEvent(I2CG, I2C_EVENT_MASTER_BYTE_TRANSMITTED)); // Test on EV8 and clear it
I2C_GenerateSTOP(I2CG, ENABLE); // Send STOP condition
}
I'm sure that I connect wires properly.
#adxl345 #c #i2c #stm32
