Posted on December 21, 2017 at 13:32Hi,
For few days I am trying to send some data over I2C2 interface. I am working with stm32f072-nucleo board.
Unfortunately something goes wrong because stm32 send only address with no data which should be transfered.
My configuration:
static void
MX_I2C2_Init(
void
)
{
LL_I2C_InitTypeDef
I2C_InitStruct
;
LL_GPIO_InitTypeDef
GPIO_InitStruct
;
/**I2C2 GPIO Configuration
PB10 ------> I2C2_SCL
PB11 ------> I2C2_SDA
*/
GPIO_InitStruct.
Pin
=
LL_GPIO_PIN_10
;
GPIO_InitStruct.
Mode
=
LL_GPIO_MODE_ALTERNATE
;
GPIO_InitStruct.
Speed
=
LL_GPIO_SPEED_FREQ_HIGH
;
GPIO_InitStruct.
OutputType
=
LL_GPIO_OUTPUT_OPENDRAIN
;
GPIO_InitStruct.
Pull
=
LL_GPIO_PULL_UP
;
GPIO_InitStruct.
Alternate
=
LL_GPIO_AF_1
;
LL_GPIO_Init(
GPIOB
,
&GPIO_InitStruct)
;
GPIO_InitStruct.
Pin
=
LL_GPIO_PIN_11
;
GPIO_InitStruct.
Mode
=
LL_GPIO_MODE_ALTERNATE
;
GPIO_InitStruct.
Speed
=
LL_GPIO_SPEED_FREQ_HIGH
;
GPIO_InitStruct.
OutputType
=
LL_GPIO_OUTPUT_OPENDRAIN
;
GPIO_InitStruct.
Pull
=
LL_GPIO_PULL_UP
;
GPIO_InitStruct.
Alternate
=
LL_GPIO_AF_1
;
LL_GPIO_Init(
GPIOB
,
&GPIO_InitStruct)
;
/* Peripheral clock enable */
LL_APB1_GRP1_EnableClock(
LL_APB1_GRP1_PERIPH_I2C2
)
;
// LL_RCC_SetI2CClockSource(LL_RCC_I2C1_CLKSOURCE_SYSCLK);
LL_RCC_SetI2CClockSource(
LL_RCC_I2C1_CLKSOURCE_SYSCLK
)
;
/**I2C Initialization
*/
I2C_InitStruct.
PeripheralMode
=
LL_I2C_MODE_I2C
;
I2C_InitStruct.
Timing
=
0x2000090E
;
//0x00901850;//0x2000090E;
I2C_InitStruct.
AnalogFilter
=
LL_I2C_ANALOGFILTER_DISABLE
;
//LL_I2C_ANALOGFILTER_ENABLE;
I2C_InitStruct.
DigitalFilter
=
0
;
I2C_InitStruct.
OwnAddress1
=
0
;
I2C_InitStruct.
TypeAcknowledge
=
LL_I2C_ACK
;
I2C_InitStruct.
OwnAddrSize
=
LL_I2C_OWNADDRESS1_7BIT
;
// LL_I2C_Disable(I2C2);
LL_I2C_Init(
I2C2
,
&I2C_InitStruct)
;
//
LL_I2C_EnableAutoEndMode(
I2C2
)
;
LL_I2C_SetOwnAddress2(
I2C2
,
0
,
LL_I2C_OWNADDRESS2_NOMASK
)
;
LL_I2C_DisableOwnAddress2(
I2C2
)
;
}
int
main(
void
)
{
LL_Init()
;
SystemClock_Config()
;
MX_GPIO_Init()
;
MX_I2C2_Init()
;
i2c_transfer_init(
0xBB
)
;
}
void
i2c_transfer_init(
uint32_t
slave_addr)
{
uint8_t
test[
10
] = {
0xAA
}
;
LL_I2C_HandleTransfer(
I2C2
,
slave_addr
,
LL_I2C_ADDRSLAVE_7BIT
,
2
,
LL_I2C_MODE_AUTOEND
,
LL_I2C_GENERATE_START_WRITE
)
;
// while(!(LL_I2C_IsActiveFlag_TXE(I2C2))); // waits forever
LL_I2C_TransmitData8(
I2C2
,
test[
0
])
;
LL_I2C_TransmitData8(
I2C2
,
test[
0
])
;
}
I am attaching oscillograms which shows that only address is being send.
Thanks in advanced for help!
#i2c-problem #nucleo-f072 #stm32f072
