hello community,
I´m using PB10/PB11 as I2C1 and PB6/PB7 as I2C2.
I2C1 works correctly.
But I2C2 not, after reset on PB6 and PB7 I just get some messy signals as below, It seems the I2C2 is not initialized with succcess.
Actually the both I2C are initialized in the same way:
Here is the pin definition for both I2C
//sensor1
#define BSP_I2C I2C1
#define BSP_I2C_CLK_ENABLE() LL_APB1_EnableClock(LL_APB1_PERIPH_I2C1)
#define BSP_I2C_CLK_DISABLE() LL_APB1_DisableClock(LL_APB1_PERIPH_I2C1)
#define BSP_I2C_DATA_PIN LL_GPIO_PIN_10
#define BSP_I2C_DATA_GPIO_PORT GPIOB
#define BSP_I2C_DATA_GPIO_PULL LL_GPIO_PULL_NO
#define BSP_I2C_DATA_GPIO_AF() LL_GPIO_SetAFPin_8_15(GPIOB, LL_GPIO_PIN_10, LL_GPIO_AF_2)
#define BSP_I2C_DATA_GPIO_CLK_ENABLE() LL_AHB_EnableClock(LL_AHB_PERIPH_GPIOB)
#define BSP_I2C_DATA_GPIO_CLK_DISABLE() LL_AHB_DisableClock(LL_AHB_PERIPH_GPIOB)
#define BSP_I2C_CLK_PIN LL_GPIO_PIN_11
#define BSP_I2C_CLK_GPIO_PORT GPIOB
#define BSP_I2C_CLK_GPIO_PULL LL_GPIO_PULL_NO
#define BSP_I2C_CLK_GPIO_AF() LL_GPIO_SetAFPin_8_15(GPIOB, LL_GPIO_PIN_11, LL_GPIO_AF_2)
#define BSP_I2C_CLK_GPIO_CLK_ENABLE() LL_AHB_EnableClock(LL_AHB_PERIPH_GPIOB)
#define BSP_I2C_CLK_GPIO_CLK_DISABLE() LL_AHB_DisableClock(LL_AHB_PERIPH_GPIOB)
//sensor2
#define BSP_I2C2 I2C2
#define BSP_I2C2_CLK_ENABLE() LL_APB1_EnableClock(LL_APB1_PERIPH_I2C2)
#define BSP_I2C2_CLK_DISABLE() LL_APB1_DisableClock(LL_APB1_PERIPH_I2C2)
#define BSP_I2C2_DATA_PIN LL_GPIO_PIN_7
#define BSP_I2C2_DATA_GPIO_PORT GPIOB
#define BSP_I2C2_DATA_GPIO_PULL LL_GPIO_PULL_NO
#define BSP_I2C2_DATA_GPIO_AF() LL_GPIO_SetAFPin_0_7(GPIOB, LL_GPIO_PIN_7, LL_GPIO_AF_0)
#define BSP_I2C2_DATA_GPIO_CLK_ENABLE() LL_AHB_EnableClock(LL_AHB_PERIPH_GPIOB)
#define BSP_I2C2_DATA_GPIO_CLK_DISABLE() LL_AHB_DisableClock(LL_AHB_PERIPH_GPIOB)
#define BSP_I2C2_CLK_PIN LL_GPIO_PIN_6
#define BSP_I2C2_CLK_GPIO_PORT GPIOB
#define BSP_I2C2_CLK_GPIO_PULL LL_GPIO_PULL_NO
#define BSP_I2C2_CLK_GPIO_AF() LL_GPIO_SetAFPin_0_7(GPIOB, LL_GPIO_PIN_6, LL_GPIO_AF_0)
#define BSP_I2C2_CLK_GPIO_CLK_ENABLE() LL_AHB_EnableClock(LL_AHB_PERIPH_GPIOB)
#define BSP_I2C2_CLK_GPIO_CLK_DISABLE() LL_AHB_DisableClock(LL_AHB_PERIPH_GPIOB)
Here is the init function for both I2C
//sensor1
void BSP_I2C_Init(void)
{
/* Initialize the GPIOs associated to the I2C port */
BSP_I2C_DATA_GPIO_CLK_ENABLE();
LL_GPIO_SetPinMode(BSP_I2C_DATA_GPIO_PORT, BSP_I2C_DATA_PIN, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinSpeed(BSP_I2C_DATA_GPIO_PORT, BSP_I2C_DATA_PIN, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinOutputType(BSP_I2C_DATA_GPIO_PORT, BSP_I2C_DATA_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
LL_GPIO_SetPinPull(BSP_I2C_DATA_GPIO_PORT, BSP_I2C_DATA_PIN, BSP_I2C_DATA_GPIO_PULL);
BSP_I2C_DATA_GPIO_AF();
BSP_I2C_CLK_GPIO_CLK_ENABLE();
LL_GPIO_SetPinMode(BSP_I2C_CLK_GPIO_PORT, BSP_I2C_CLK_PIN, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinSpeed(BSP_I2C_CLK_GPIO_PORT, BSP_I2C_CLK_PIN, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinOutputType(BSP_I2C_CLK_GPIO_PORT, BSP_I2C_CLK_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
LL_GPIO_SetPinPull(BSP_I2C_CLK_GPIO_PORT, BSP_I2C_CLK_PIN, BSP_I2C_CLK_GPIO_PULL);
BSP_I2C_CLK_GPIO_AF();
/* Initialize the I2C clock */
BSP_I2C_CLK_ENABLE();
LL_I2C_Disable(BSP_I2C);
/* Configure the SDA setup, hold time and the SCL high, low period
* For Fast-mode 400 kHz, PRESC | 0h | SCLDEL | SDADEL | SCLH | SCLL
* 1h | 0h | 3h | 2h | 03h | 09h
*/
LL_I2C_SetTiming(BSP_I2C, 0x10320309);
/* Enable Clock stretching */
LL_I2C_EnableClockStretching(BSP_I2C);
/* Enable Peripheral in I2C mode */
LL_I2C_SetMode(BSP_I2C, LL_I2C_MODE_I2C);
/* Enable the I2C peripheral */
LL_I2C_Enable(BSP_I2C);
/* Enable I2C transfer complete/error interrupts:
* - Enable Receive Interrupt
* - Enable Not acknowledge received interrupt
* - Enable Error interrupts
* - Enable Stop interrupt
*/
// LL_I2C_EnableIT_TX(BSP_I2C);
// LL_I2C_EnableIT_RX(BSP_I2C);
// LL_I2C_EnableIT_TC(BSP_I2C);
// LL_I2C_EnableIT_NACK(BSP_I2C);
// LL_I2C_EnableIT_ERR(BSP_I2C);
// LL_I2C_EnableIT_STOP(BSP_I2C);
}
//sensor2
void BSP_I2C2_Init(void)
{
/* Initialize the GPIOs associated to the I2C port */
BSP_I2C2_DATA_GPIO_CLK_ENABLE();
LL_GPIO_SetPinMode(BSP_I2C2_DATA_GPIO_PORT, BSP_I2C2_DATA_PIN, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinSpeed(BSP_I2C2_DATA_GPIO_PORT, BSP_I2C2_DATA_PIN, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinOutputType(BSP_I2C2_DATA_GPIO_PORT, BSP_I2C2_DATA_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
LL_GPIO_SetPinPull(BSP_I2C2_DATA_GPIO_PORT, BSP_I2C2_DATA_PIN, BSP_I2C2_DATA_GPIO_PULL);
BSP_I2C2_DATA_GPIO_AF();
BSP_I2C2_CLK_GPIO_CLK_ENABLE();
LL_GPIO_SetPinMode(BSP_I2C2_CLK_GPIO_PORT, BSP_I2C2_CLK_PIN, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinSpeed(BSP_I2C2_CLK_GPIO_PORT, BSP_I2C2_CLK_PIN, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinOutputType(BSP_I2C2_CLK_GPIO_PORT, BSP_I2C2_CLK_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
LL_GPIO_SetPinPull(BSP_I2C2_CLK_GPIO_PORT, BSP_I2C2_CLK_PIN, BSP_I2C2_CLK_GPIO_PULL);
BSP_I2C2_CLK_GPIO_AF();
/* Initialize the I2C clock */
BSP_I2C2_CLK_ENABLE();
LL_I2C_Disable(BSP_I2C2);
/* Configure the SDA setup, hold time and the SCL high, low period
* For Fast-mode 400 kHz, PRESC | 0h | SCLDEL | SDADEL | SCLH | SCLL
* 1h | 0h | 3h | 2h | 03h | 09h
*/
LL_I2C_SetTiming(BSP_I2C2, 0x10320309);
/* Enable Clock stretching */
LL_I2C_EnableClockStretching(BSP_I2C2);
/* Enable Peripheral in I2C mode */
LL_I2C_SetMode(BSP_I2C2, LL_I2C_MODE_I2C);
/* Enable the I2C peripheral */
LL_I2C_Enable(BSP_I2C2);
/* Enable I2C transfer complete/error interrupts:
* - Enable Receive Interrupt
* - Enable Not acknowledge received interrupt
* - Enable Error interrupts
* - Enable Stop interrupt
*/
// LL_I2C_EnableIT_TX(BSP_I2C);
// LL_I2C_EnableIT_RX(BSP_I2C);
// LL_I2C_EnableIT_TC(BSP_I2C);
// LL_I2C_EnableIT_NACK(BSP_I2C);
// LL_I2C_EnableIT_ERR(BSP_I2C);
// LL_I2C_EnableIT_STOP(BSP_I2C);
}
***********************************************************************
any idea?
thanks in advance.
Danny
