Question
porting stm32f4 to stm32f1-stuck with ERROR: last event is different from I2C_EVENT
Posted on April 26, 2018 at 08:21
hi,
i was trying to port code from stm32f4 to stm32f1. the code is used for obtaining gyroscope values from GY521(mPU6050) through i2c by dma. and iam stuck with ERROR: last event is different from I2C_EVENT. below is my 12c mpu setup function.setup_i2c_for_mpu6050() { GPIO_InitTypeDef GPIO_InitStruct; I2C_InitTypeDef I2C_InitStruct; NVIC_InitTypeDef NVIC_InitStructure; DMA_InitTypeDef DMA_InitStructure;/* Use I2C1, with SCL on PB8 and SDA on PB7. */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); /* Reset the I2C unit. *//* Enable DMA clock for I2C. */
RCC_APB1PeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* Configure I2C_EE pins: SCL and SDA */ GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_OD; GPIO_Init(GPIOB, &GPIO_InitStruct);/* Initialise DMA. */
DMA_ClearFlag(DMA1_FLAG_TC1|DMA1_FLAG_TE1|DMA1_FLAG_HT1); DMA_DeInit(DMA1_Channel1); //DMA_Cmd(DMA1_Channel1, DISABLE); // DMA_DeInit(DMA1_Channel1); /* Address of data register. */ DMA_InitStructure.DMA_PeripheralBaseAddr = I2C1_BASE + I2C_Register_DR; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; DMA_InitStructure.DMA_Priority = DMA_Priority_Medium; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)mpu6050_reg_buffer; DMA_InitStructure.DMA_BufferSize = 14; DMA_DeInit(DMA1_Channel1); DMA_Init(DMA1_Channel1, &DMA_InitStructure); DMA_Cmd(DMA1_Channel1 , ENABLE ) ; I2C_InitStruct.I2C_ClockSpeed = 100000; I2C_InitStruct.I2C_Mode = I2C_Mode_I2C; I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2; I2C_InitStruct.I2C_OwnAddress1 = 0x00; I2C_InitStruct.I2C_Ack = I2C_Ack_Disable; I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; I2C_Init(I2C1, &I2C_InitStruct); I2C_ITConfig(I2C1, I2C_IT_BUF|I2C_IT_EVT|I2C_IT_ERR, DISABLE);/* Configure the I2C interrupts. */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4); NVIC_InitStructure.NVIC_IRQChannel = I2C1_EV_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 10; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = I2C1_ER_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 10; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure);DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, DISABLE);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 10; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);I2C_Cmd(I2C1, ENABLE);
}when iam calling this below function it gets stuckedwhile (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_CheckEvent function is given below------
ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx, uint32_t I2C_EVENT)
{ uint32_t lastevent = 0; uint32_t flag1 = 0, flag2 = 0; ErrorStatus status = ERROR;/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx)); assert_param(IS_I2C_EVENT(I2C_EVENT));/* Read the I2Cx status register */
flag1 = I2Cx->SR1; flag2 = I2Cx->SR2; flag2 = flag2 << 16;/* Get the last event value from I2C status register */
lastevent = (flag1 | flag2) & FLAG_Mask;/* Check whether the last event contains the I2C_EVENT */
if ((lastevent & I2C_EVENT) == I2C_EVENT) { /* SUCCESS: last event is equal to I2C_EVENT */ status = SUCCESS; } else { /* ERROR: last event is different from I2C_EVENT */ status = ERROR; } /* Return status */ return status;}anyone has same issues?