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boards: nucleo_f103rb: enables I2C_1 and I2C_2 #12246

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boards: nucleo_f103rb: enables I2C_1 and I2C_2 #12246

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c2d94b1
boards: nucleo_f103rb: enables I2C_1 and I2C_2
mattzzw Dec 30, 2018
9371aa2
boards: nucleo_f103rb: added I2C_1 to Kconfig, pinpux
mattzzw Jan 3, 2019
d004997
boards: nucleo_f103rb: remapped I2C_1 pins to PB8/PB9
mattzzw Jan 4, 2019
d15d516
boards: nucleo_f103rb: remap I2C_1 only when I2C_1 is enabled
mattzzw Jan 15, 2019
4f9a48e
boards: nucleo_f103rb: enables I2C_1 and I2C_2
mattzzw Feb 11, 2019
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9 changes: 8 additions & 1 deletion boards/arm/nucleo_f103rb/Kconfig.defconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,13 @@ config SPI_1
config SPI_2
default y

endif
endif # SPI

if I2C

config I2C_1
default y

endif # I2C

endif # BOARD_NUCLEO_F103RB
9 changes: 9 additions & 0 deletions boards/arm/nucleo_f103rb/nucleo_f103rb.dts
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Expand Up @@ -77,4 +77,13 @@ arduino_spi: &spi1 {

&idwg {
status = "ok";

arduino_i2c: &i2c1 {
status = "ok";
clock-frequency = <I2C_BITRATE_FAST>;
};

&i2c2 {
status = "ok";
clock-frequency = <I2C_BITRATE_FAST>;
};
13 changes: 13 additions & 0 deletions boards/arm/nucleo_f103rb/pinmux.c
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,8 @@
#include <sys_io.h>

#include <pinmux/stm32/pinmux_stm32.h>
#include <stm32f1xx_ll_gpio.h>
#include <stm32f1xx_ll_bus.h>

/* pin assignments for NUCLEO-F103RB board */
static const struct pin_config pinconf[] = {
Expand Down Expand Up @@ -41,6 +43,10 @@ static const struct pin_config pinconf[] = {
{STM32_PIN_PB14, STM32F1_PINMUX_FUNC_PB14_SPI2_MASTER_MISO},
{STM32_PIN_PB15, STM32F1_PINMUX_FUNC_PB15_SPI2_MASTER_MOSI},
#endif /* CONFIG_SPI_2 */
#ifdef CONFIG_I2C_1
{STM32_PIN_PB8, STM32F1_PINMUX_FUNC_PB8_I2C1_SCL},
{STM32_PIN_PB9, STM32F1_PINMUX_FUNC_PB9_I2C1_SDA},
#endif /* CONFIG_I2C_1 */
};

static int pinmux_stm32_init(struct device *port)
Expand All @@ -49,6 +55,13 @@ static int pinmux_stm32_init(struct device *port)

stm32_setup_pins(pinconf, ARRAY_SIZE(pinconf));

#ifdef CONFIG_I2C_1
/* AFIO clock needed for AF remap */
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_AFIO);
/* Remap I2C1 from PB6/PB7 to PB8/PB9 for Arduino pin compatibility */
LL_GPIO_AF_EnableRemap_I2C1();
#endif /* CONFIG_I2C_1 */

return 0;
}

Expand Down