2011-11-27 02:03 PM
Hello. 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 #stm322011-11-28 06:16 AM
if this is f1xx READ THE ERRATA