Skip to content

Increase I2C stability at 400KHz. #288

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
ghent360 wants to merge 6 commits into from
Closed

Increase I2C stability at 400KHz. #288

Changes from all commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
b16d8d1
Increase I2C stability at 400KHz.
ghent360 Jul 30, 2018
cadea62
Merge branch 'master' of https://github.com/stm32duino/Arduino_Core_S…
ghent360 Aug 1, 2018
00256b4
Merge branch 'master' of https://github.com/stm32duino/Arduino_Core_S…
ghent360 Aug 2, 2018
62008ad
Merge branch 'master' of https://github.com/stm32duino/Arduino_Core_S…
ghent360 Aug 5, 2018
ed177a2
Merge branch 'master' of https://github.com/stm32duino/Arduino_Core_S…
ghent360 Aug 7, 2018
df5d16b
Merge branch 'master' of https://github.com/stm32duino/Arduino_Core_S…
ghent360 Aug 15, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
52 changes: 26 additions & 26 deletions cores/arduino/stm32/twi.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -175,6 +175,32 @@ void i2c_custom_init(i2c_t *obj, i2c_timing_e timing, uint32_t addressingMode, u
return;
}

//SCL
port = set_GPIO_Port_Clock(STM_PORT(obj->scl));
GPIO_InitStruct.Pin = STM_GPIO_PIN(obj->scl);
GPIO_InitStruct.Mode = STM_PIN_MODE(pinmap_function(obj->scl,PinMap_I2C_SCL));
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Pull = STM_PIN_PUPD(pinmap_function(obj->scl,PinMap_I2C_SCL));
#ifdef STM32F1xx
pin_SetF1AFPin(STM_PIN_AFNUM(pinmap_function(obj->scl,PinMap_I2C_SCL)));
#else
GPIO_InitStruct.Alternate = STM_PIN_AFNUM(pinmap_function(obj->scl,PinMap_I2C_SCL));
#endif /* STM32F1xx */
HAL_GPIO_Init(port, &GPIO_InitStruct);

//SDA
port = set_GPIO_Port_Clock(STM_PORT(obj->sda));
GPIO_InitStruct.Pin = STM_GPIO_PIN(obj->sda);
GPIO_InitStruct.Mode = STM_PIN_MODE(pinmap_function(obj->sda,PinMap_I2C_SDA));
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Pull = STM_PIN_PUPD(pinmap_function(obj->sda,PinMap_I2C_SDA));
#ifdef STM32F1xx
pin_SetF1AFPin(STM_PIN_AFNUM(pinmap_function(obj->sda,PinMap_I2C_SDA)));
#else
GPIO_InitStruct.Alternate = STM_PIN_AFNUM(pinmap_function(obj->sda,PinMap_I2C_SDA));
#endif /* STM32F1xx */
HAL_GPIO_Init(port, &GPIO_InitStruct);

#if defined I2C1_BASE
// Enable I2C1 clock if not done
if (obj->i2c == I2C1) {
Expand Down Expand Up @@ -229,32 +255,6 @@ void i2c_custom_init(i2c_t *obj, i2c_timing_e timing, uint32_t addressingMode, u
}
#endif // I2C4_BASE

//SCL
port = set_GPIO_Port_Clock(STM_PORT(obj->scl));
GPIO_InitStruct.Pin = STM_GPIO_PIN(obj->scl);
GPIO_InitStruct.Mode = STM_PIN_MODE(pinmap_function(obj->scl,PinMap_I2C_SCL));
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Pull = STM_PIN_PUPD(pinmap_function(obj->scl,PinMap_I2C_SCL));
#ifdef STM32F1xx
pin_SetF1AFPin(STM_PIN_AFNUM(pinmap_function(obj->scl,PinMap_I2C_SCL)));
#else
GPIO_InitStruct.Alternate = STM_PIN_AFNUM(pinmap_function(obj->scl,PinMap_I2C_SCL));
#endif /* STM32F1xx */
HAL_GPIO_Init(port, &GPIO_InitStruct);

//SDA
port = set_GPIO_Port_Clock(STM_PORT(obj->sda));
GPIO_InitStruct.Pin = STM_GPIO_PIN(obj->sda);
GPIO_InitStruct.Mode = STM_PIN_MODE(pinmap_function(obj->sda,PinMap_I2C_SDA));
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Pull = STM_PIN_PUPD(pinmap_function(obj->sda,PinMap_I2C_SDA));
#ifdef STM32F1xx
pin_SetF1AFPin(STM_PIN_AFNUM(pinmap_function(obj->sda,PinMap_I2C_SDA)));
#else
GPIO_InitStruct.Alternate = STM_PIN_AFNUM(pinmap_function(obj->sda,PinMap_I2C_SDA));
#endif /* STM32F1xx */
HAL_GPIO_Init(port, &GPIO_InitStruct);

handle->Instance = obj->i2c;
#if defined (STM32F0xx) || defined (STM32F3xx) || defined (STM32F7xx) ||\
defined (STM32L0xx) || defined (STM32L4xx)
Expand Down