STM32F030CC, I2C1 busy after I2C_TransferHandling

karlis · ‎2016-01-26

Posted on January 26, 2016 at 16:47

Hello, this is my first time on this forum.

I was using STM32F030F4 for communication with battery (SMBus).

I decided to change it for STM32F030CC, but it seems like my I2C1 is not working properly any more.

I used the same pins as before, PA9 and PA10, and the same code, but it seems like I2C1 is stuck in busy state. It happens after this line :

I2C_TransferHandling(I2C1, 0x16, 1, I2C_SoftEnd_Mode, I2C_Generate_Start_Write);

I will try to enter parts of my code which describes I2C1.

BTW I have tried some of the tips about this problem(reseting I2C1 after enabling it's clock, defining GPIOS after I2C1 configuration, Enabling I2C1 before I2C_Init) , but it doesn't seem to work, maybe there is some problem in my configuration.

&sharpinclude <stm32f0xx_gpio.h>

&sharpinclude <stm32f0xx_rcc.h>

&sharpinclude <stm32f0xx_i2c.h>

&sharpinclude <stm32f0xx_usart.h>

&sharpinclude <stm32f0xx.h>

&sharpinclude <stm32f0xx_adc.h>

&sharpinclude <stm32f0xx_exti.h>

&sharpinclude <stm32f0xx_syscfg.h>

&sharpdefine SMBUS_CLK_PIN GPIO_Pin_9

&sharpdefine SMBUS_DATA_PIN GPIO_Pin_10

unsigned char volt_A;

unsigned char volt_B;

unsigned char temp_A;

unsigned char temp_B;

void SMBUS_FLAG_BUSY()

{

while (I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY))

;

}

void read_SMBus() // this loop is because if the battery gets disconnected while communication is happening MCU hangs forever waiting a message

{

while (I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) == 0)

{

i++;

if (i == 1000)

{

i = 0;

break;

}

i = 0;

}

void PIN_CONFIGURATION(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

I2C_InitTypeDef I2C_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);

RCC_I2CCLKConfig(RCC_I2C1CLK_SYSCLK);

/* AF - alternate function */

GPIO_PinAFConfig(GPIOA, SMBUS_DATA_PIN, GPIO_AF_4);

GPIO_PinAFConfig(GPIOA, SMBUS_CLK_PIN, GPIO_AF_4);

//Configure pins: SCL and SDA ------------------

GPIO_InitStructure.GPIO_Pin = SMBUS_DATA_PIN | SMBUS_CLK_PIN;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;

GPIO_Init(GPIOA, &GPIO_InitStructure);

// I2C configuration

I2C_DeInit(I2C1);

I2C_Cmd(I2C1, DISABLE);

I2C_InitStructure.I2C_Timing = 0xB0420F13; //B0420F13 vai moshk sit? 0x00901D23

I2C_InitStructure.I2C_AnalogFilter = I2C_AnalogFilter_Enable;// analogaistroksnu filtrs ieslegts

I2C_InitStructure.I2C_DigitalFilter = 0x00; // digitalais troksnu filtrs izslegts

I2C_InitStructure.I2C_Mode = I2C_Mode_I2C; // pec tam buus siten I2c uz SMBus modi janomaina

I2C_InitStructure.I2C_OwnAddress1 = 0x40;// kaa tiek izveeleeta adrese

I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; // sitam jaabut bus ieslegtam ari tad kad SMBus buus laikam

I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

I2C_Cmd(I2C1, ENABLE);

I2C_Init(I2C1, &I2C_InitStructure);

I2C_TimeoutAConfig(I2C1, 0x63);//

I2C_TimeoutBConfig(I2C1, 0x1F); // replacable with I2C1->TIMEOUTR |= 0x801F9063; i guess

}

int main(void)

{

PIN_CONFIGURATION();

while(1)

{

SMBUS_FLAG_BUSY();

I2C_TransferHandling(I2C1, 0x16, 1, I2C_SoftEnd_Mode, I2C_Generate_Start_Write);

// now I2C1 is busy

I2C_SendData(I2C1, 0x9);

I2C_ExtendedClockTimeoutCmd(I2C1, ENABLE);

SMBUS_FLAG_BUSY();

I2C_TransferHandling(I2C1, 0x16, 2, I2C_SoftEnd_Mode, I2C_Generate_Start_Read);

I2C_SlaveByteControlCmd(I2C1, ENABLE);// In order to allow byte ACK control in slave reception mode, Slave Byte Control mode must be enabled by setting the SBC bit in the I2C_CR1 register. This is required to be compliant with SMBus standards.

read_SMBus();

volt_A = I2C_ReceiveData(I2C1);

read_SMBus();

volt_B = I2C_ReceiveData(I2C1);

SMBUS_FLAG_BUSY();

I2C_TransferHandling(I2C1, 0x16, 1, I2C_SoftEnd_Mode, I2C_Generate_Start_Write);

I2C_SendData(I2C1, 0x8);

I2C_ExtendedClockTimeoutCmd(I2C1, ENABLE);

SMBUS_FLAG_BUSY();

I2C_TransferHandling(I2C1, 0x16, 2, I2C_SoftEnd_Mode, I2C_Generate_Start_Read);

I2C_SlaveByteControlCmd(I2C1, ENABLE);// In order to allow byte ACK control in slave reception mode, Slave Byte Control mode must be enabled by setting the SBC bit in the I2C_CR1 register. This is required to be compliant with SMBus standards.

read_SMBus();

temp_A = I2C_ReceiveData(I2C1);

read_SMBus();

temp_B = I2C_ReceiveData(I2C1);

}

#stm32f030cc #i2c1-busy

karlis · ‎2016-01-26

Posted on January 26, 2016 at 18:43

I solved this problem.

I guess I'm retarded.

Instead of SMBUS_DATA_PIN and SMBUS_CLK_PIN there must be GPIO_PinSource9 and 10. I thought I can use GPIO_Pin_9 and 10 there , but I was wrong.

instead of this:

/* AF - alternate function */

GPIO_PinAFConfig(GPIOA, SMBUS_DATA_PIN, GPIO_AF_4);

GPIO_PinAFConfig(GPIOA, SMBUS_CLK_PIN, GPIO_AF_4);

there should be this:

GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_4);

GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_4);