Merge pull request #9347 from smlng/pr/cc2538/i2c

cpu/cc2538: adapt periph to new I2C API
RIOT-OS · Jul 11, 2018 · 8cc8b0c · 8cc8b0c
2 parents baf47a5 + 0dea2d1
commit 8cc8b0c
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Showing 8 changed files with 315 additions and 599 deletions.
diff --git a/boards/cc2538dk/include/periph_conf.h b/boards/cc2538dk/include/periph_conf.h
@@ -84,23 +84,17 @@ static const uart_conf_t uart_config[] = {
  * @name I2C configuration
  * @{
  */
-#define I2C_NUMOF               1
-#define I2C_0_EN                1
 #define I2C_IRQ_PRIO            1
 
-/* I2C 0 device configuration */
-#define I2C_0_DEV               0
-#define I2C_0_IRQ               I2C_IRQn
-#define I2C_0_IRQ_HANDLER       isr_i2c
-#define I2C_0_SCL_PIN           GPIO_PA2 /* SPI_SCK on the SmartRF06 baseboard */
-#define I2C_0_SDA_PIN           GPIO_PA4 /* SPI_MOSI on the SmartRF06 baseboard */
-
-static const i2c_conf_t i2c_config[I2C_NUMOF] = {
+static const i2c_conf_t i2c_config[] = {
     {
-        .scl_pin = GPIO_PA2, /* SPI_SCK on the SmartRF06 baseboard */
-        .sda_pin = GPIO_PA4, /* SPI_MOSI on the SmartRF06 baseboard */
+        .speed = I2C_SPEED_FAST,    /**< bus speed */
+        .scl_pin = GPIO_PIN(0, 2),  /**< GPIO_PA2, SPI_SCK  on SmartRF06 */
+        .sda_pin = GPIO_PIN(0, 4)   /**< GPIO_PA4, SPI_MOSI on SmartRF06 */
     },
 };
+
+#define I2C_NUMOF               (sizeof(i2c_config) / sizeof(i2c_config[0]))
 /** @} */
 
 /**

diff --git a/boards/openmote-cc2538/include/periph_conf.h b/boards/openmote-cc2538/include/periph_conf.h
@@ -107,23 +107,17 @@ static const uart_conf_t uart_config[] = {
  * @name    I2C configuration
  * @{
  */
-#define I2C_NUMOF               1
-#define I2C_0_EN                1
 #define I2C_IRQ_PRIO            1
 
-/* I2C 0 device configuration */
-#define I2C_0_DEV               0
-#define I2C_0_IRQ               I2C_IRQn
-#define I2C_0_IRQ_HANDLER       isr_i2c
-#define I2C_0_SCL_PIN           GPIO_PB3 /* OpenBattery */
-#define I2C_0_SDA_PIN           GPIO_PB4 /* OpenBattery */
-
-static const i2c_conf_t i2c_config[I2C_NUMOF] = {
+static const i2c_conf_t i2c_config[] = {
     {
-        .scl_pin = GPIO_PB3, /* OpenBattery */
-        .sda_pin = GPIO_PB4, /* OpenBattery */
+        .speed = I2C_SPEED_FAST,    /**< bus speed */
+        .scl_pin = GPIO_PIN(1, 3),  /**< GPIO_PB3, OpenBattery */
+        .sda_pin = GPIO_PIN(1, 4)   /**< GPIO_PB4, OpenBattery */
     },
 };
+
+#define I2C_NUMOF               (sizeof(i2c_config) / sizeof(i2c_config[0]))
 /** @} */
 
 /**

diff --git a/boards/remote-pa/include/periph_conf.h b/boards/remote-pa/include/periph_conf.h
@@ -32,23 +32,17 @@
  * @name    I2C configuration
  * @{
  */
-#define I2C_NUMOF               1
-#define I2C_0_EN                1
 #define I2C_IRQ_PRIO            1
 
-/* I2C 0 device configuration */
-#define I2C_0_DEV               0
-#define I2C_0_IRQ               I2C_IRQn
-#define I2C_0_IRQ_HANDLER       isr_i2c
-#define I2C_0_SCL_PIN           GPIO_PB1
-#define I2C_0_SDA_PIN           GPIO_PB0
-
-static const i2c_conf_t i2c_config[I2C_NUMOF] = {
+static const i2c_conf_t i2c_config[] = {
     {
-        .scl_pin = I2C_0_SCL_PIN,
-        .sda_pin = I2C_0_SDA_PIN,
+        .speed = I2C_SPEED_FAST,    /**< bus speed */
+        .scl_pin = GPIO_PIN(1, 1),  /**< GPIO_PB1 */
+        .sda_pin = GPIO_PIN(1, 0)   /**< GPIO_PB0 */
     },
 };
+
+#define I2C_NUMOF               (sizeof(i2c_config) / sizeof(i2c_config[0]))
 /** @} */
 
 /**

diff --git a/boards/remote-reva/include/periph_conf.h b/boards/remote-reva/include/periph_conf.h
@@ -32,23 +32,17 @@
  * @name I2C configuration
  * @{
  */
-#define I2C_NUMOF               1
-#define I2C_0_EN                1
 #define I2C_IRQ_PRIO            1
 
-/* I2C 0 device configuration */
-#define I2C_0_DEV               0
-#define I2C_0_IRQ               I2C_IRQn
-#define I2C_0_IRQ_HANDLER       isr_i2c
-#define I2C_0_SCL_PIN           GPIO_PC3
-#define I2C_0_SDA_PIN           GPIO_PC2
-
-static const i2c_conf_t i2c_config[I2C_NUMOF] = {
+static const i2c_conf_t i2c_config[] = {
     {
-        .scl_pin = I2C_0_SCL_PIN,
-        .sda_pin = I2C_0_SDA_PIN,
+        .speed = I2C_SPEED_FAST,    /**< bus speed */
+        .scl_pin = GPIO_PIN(2, 3),  /**< GPIO_PC3 */
+        .sda_pin = GPIO_PIN(2, 2)   /**< GPIO_PC2 */
     },
 };
+
+#define I2C_NUMOF               (sizeof(i2c_config) / sizeof(i2c_config[0]))
 /** @} */
 
 /**

diff --git a/boards/remote-revb/include/periph_conf.h b/boards/remote-revb/include/periph_conf.h
@@ -35,23 +35,17 @@
  * @name I2C configuration
  * @{
  */
-#define I2C_NUMOF               1
-#define I2C_0_EN                1
 #define I2C_IRQ_PRIO            1
 
-/* I2C 0 device configuration */
-#define I2C_0_DEV               0
-#define I2C_0_IRQ               I2C_IRQn
-#define I2C_0_IRQ_HANDLER       isr_i2c
-#define I2C_0_SCL_PIN           GPIO_PC3
-#define I2C_0_SDA_PIN           GPIO_PC2
-
-static const i2c_conf_t i2c_config[I2C_NUMOF] = {
+static const i2c_conf_t i2c_config[] = {
     {
-        .scl_pin = I2C_0_SCL_PIN,
-        .sda_pin = I2C_0_SDA_PIN,
+        .speed = I2C_SPEED_FAST,    /**< bus speed */
+        .scl_pin = GPIO_PIN(2, 3),  /**< GPIO_PC3 */
+        .sda_pin = GPIO_PIN(2, 2)   /**< GPIO_PC2 */
     },
 };
+
+#define I2C_NUMOF               (sizeof(i2c_config) / sizeof(i2c_config[0]))
 /** @} */
 
 /**

diff --git a/cpu/cc2538/include/periph_cpu.h b/cpu/cc2538/include/periph_cpu.h
@@ -78,10 +78,44 @@ typedef uint32_t gpio_t;
  */
 void gpio_init_af(gpio_t pin, uint8_t sel, uint8_t over);
 
+/**
+ * @brief   Configure an alternate function for the given pin
+ *
+ * @param[in] pin   gpio pin
+ * @param[in] over  Override pin configuration
+ * @param[in] sel   Set peripheral function for pin (output)
+ * @param[in] func  Set pin for peripheral function (input)
+ */
+void gpio_init_mux(gpio_t pin, uint8_t over, uint8_t sel, uint8_t func);
+
+/**
+ * @name   Use shared I2C functions
+ * @{
+ */
+#define PERIPH_I2C_NEED_READ_REG
+#define PERIPH_I2C_NEED_READ_REGS
+#define PERIPH_I2C_NEED_WRITE_REG
+#define PERIPH_I2C_NEED_WRITE_REGS
+/** @} */
+
+/**
+ * @name   Override I2C clock speed values
+ * @{
+ */
+#define HAVE_I2C_SPEED_T
+typedef enum {
+    I2C_SPEED_LOW       = 0x01,     /**< not supported */
+    I2C_SPEED_NORMAL    = 100000U,  /**< normal mode:   ~100kbit/s */
+    I2C_SPEED_FAST      = 400000U,  /**< fast mode:     ~400kbit/s */
+    I2C_SPEED_FAST_PLUS = 0x02,     /**< not supported */
+    I2C_SPEED_HIGH      = 0x03,     /**< not supported */
+} i2c_speed_t;
+/** @} */
 /**
  * @brief   I2C configuration options
  */
 typedef struct {
+    i2c_speed_t speed;      /**< baudrate used for the bus */
     gpio_t scl_pin;         /**< pin used for SCL */
     gpio_t sda_pin;         /**< pin used for SDA */
 } i2c_conf_t;

diff --git a/cpu/cc2538/periph/gpio.c b/cpu/cc2538/periph/gpio.c
@@ -259,3 +259,20 @@ void gpio_init_af(gpio_t pin, uint8_t sel, uint8_t over)
     /* enable alternative function mode */
     gpio(pin)->AFSEL |= _pin_mask(pin);
 }
+
+void gpio_init_mux(gpio_t pin, uint8_t over, uint8_t sel, uint8_t func)
+{
+    assert(pin != GPIO_UNDEF);
+    /* configure pin function and multiplexing */
+    if (over != MODE_NOTSUP) {
+        IOC->OVER[_pp_num(pin)] = over;
+    }
+    if (sel != MODE_NOTSUP) {
+        IOC->SEL[_pp_num(pin)] = sel;
+    }
+    if (func != MODE_NOTSUP) {
+        IOC->PINS[func] = _pp_num(pin);
+    }
+    /* enable alternative function mode */
+    gpio(pin)->AFSEL |= _pin_mask(pin);
+}