Merge pull request #7132 from Marc-Aurele/ws-integration

cpu/stm32l0: add i2c driver
RIOT-OS · Jun 8, 2017 · 1934ae1 · 1934ae1
2 parents f5a1e82 + 2a27cb2
commit 1934ae1
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diff --git a/boards/nucleo-l073/Makefile.features b/boards/nucleo-l073/Makefile.features
@@ -2,6 +2,7 @@
 FEATURES_PROVIDED += periph_cpuid
 FEATURES_PROVIDED += periph_gpio
 FEATURES_PROVIDED += periph_hwrng
+FEATURES_PROVIDED += periph_i2c
 FEATURES_PROVIDED += periph_pwm
 FEATURES_PROVIDED += periph_rtc
 FEATURES_PROVIDED += periph_spi

diff --git a/boards/nucleo-l073/include/periph_conf.h b/boards/nucleo-l073/include/periph_conf.h
@@ -189,6 +189,51 @@ static const spi_conf_t spi_config[] = {
 #define DAC_NUMOF           (0)
 /** @} */
 
+/**
+ * @name I2C configuration
+ * @{
+ */
+#define I2C_0_EN            1
+#define I2C_1_EN            1
+#define I2C_NUMOF           (I2C_0_EN + I2C_1_EN)
+#define I2C_IRQ_PRIO        1
+#define I2C_APBCLK          (CLOCK_APB1)
+
+/* I2C 0 device configuration */
+#define I2C_0_DEV           I2C1
+#define I2C_0_CLKEN()       (periph_clk_en(APB1, RCC_APB1ENR_I2C1EN))
+#define I2C_0_CLKDIS()      (periph_clk_dis(APB1, RCC_APB1ENR_I2C1EN))
+#define I2C_0_EVT_IRQ       I2C1_IRQn
+#define I2C_0_EVT_ISR       isr_i2c1
+/* I2C 0 pin configuration */
+#define I2C_0_SCL_PORT      PORT_B
+#define I2C_0_SCL_PIN       8
+#define I2C_0_SCL_AF        4
+#define I2C_0_SCL_CLKEN()   (periph_clk_en(AHB, RCC_IOPENR_GPIOBEN))
+#define I2C_0_SDA_PORT      PORT_B
+#define I2C_0_SDA_PIN       9
+#define I2C_0_SDA_AF        4
+#define I2C_0_SDA_CLKEN()   (periph_clk_en(AHB, RCC_IOPENR_GPIOBEN))
+
+/* I2C 1 device configuration */
+#define I2C_1_DEV           I2C3
+#define I2C_1_CLKEN()       (periph_clk_en(APB1, RCC_APB1ENR_I2C3EN))
+#define I2C_1_CLKDIS()      (periph_clk_dis(APB1, RCC_APB1ENR_I2C3EN))
+#define I2C_1_EVT_IRQ       I2C3_IRQn
+#define I2C_1_EVT_ISR       isr_i2c3
+/* I2C 1 pin configuration */
+#define I2C_1_SCL_PORT      PORT_A
+#define I2C_1_SCL_PIN       8
+#define I2C_1_SCL_AF        3
+#define I2C_1_SCL_CLKEN()   (periph_clk_en(AHB, RCC_IOPENR_GPIOAEN))
+#define I2C_1_SDA_PORT      PORT_B
+#define I2C_1_SDA_PIN       5
+#define I2C_1_SDA_AF        8
+#define I2C_1_SDA_CLKEN()   (periph_clk_en(AHB, RCC_IOPENR_GPIOBEN))
+/** @} */
+
+/** @} */
+
 /**
  * @name    RTC configuration
  * @{

diff --git a/cpu/stm32l0/include/periph_cpu.h b/cpu/stm32l0/include/periph_cpu.h
@@ -73,6 +73,18 @@ typedef struct {
     uint8_t chan;           /**< DAC device used for this line */
 } dac_conf_t;
 
+/**
+ * @brief   I2C configuration data structure
+ */
+typedef struct {
+    I2C_TypeDef *dev;       /**< i2c device */
+    gpio_t scl;             /**< scl pin number */
+    gpio_t sda;             /**< sda pin number */
+    gpio_mode_t pin_mode;   /**< with or without pull resistor */
+    gpio_af_t af;           /**< I2C alternate function value */
+    uint8_t ev_irqn;        /**< event IRQ */
+} i2c_conf_t;
+
 #ifdef __cplusplus
 }
 #endif