cpu: stm32f3: use periph_common SPI functions

cpu/stm32f3/Makefile.include

@@ -3,4 +3,7 @@ export CPU_ARCH = cortex-m4f
 # use hwtimer compatibility module
 USEMODULE += hwtimer_compat
 
+# includ common periph module
+USEMODULE += periph_common
+
 include $(RIOTCPU)/Makefile.include.cortexm_common

cpu/stm32f3/include/periph_cpu.h

@@ -79,6 +79,15 @@ typedef enum {
     GPIO_AF15               /**< use alternate function 14 */
 } gpio_af_t;
 
+/**
+ * @brief declare needed generic SPI functions
+ * @{
+ */
+#define PERIPH_SPI_NEEDS_TRANSFER_BYTES
+#define PERIPH_SPI_NEEDS_TRANSFER_REG
+#define PERIPH_SPI_NEEDS_TRANSFER_REGS
+/** @} */
+
 #ifdef __cplusplus
 }
 #endif

cpu/stm32f3/periph/spi.c

@@ -334,62 +334,6 @@ int spi_transfer_byte(spi_t dev, char out, char *in)
     return 1;
 }
 
-int spi_transfer_bytes(spi_t dev, char *out, char *in, unsigned int length)
-{
-    int i, trans_ret, trans_bytes = 0;
-    char in_temp;
-
-    for (i = 0; i < length; i++) {
-        if (out != NULL) {
-            trans_ret = spi_transfer_byte(dev, out[i], &in_temp);
-        }
-        else {
-            trans_ret = spi_transfer_byte(dev, 0, &in_temp);
-        }
-        if (trans_ret < 0) {
-            return -1;
-        }
-        if (in != NULL) {
-            in[i] = in_temp;
-        }
-        trans_bytes++;
-    }
-
-    return trans_bytes++;
-}
-
-int spi_transfer_reg(spi_t dev, uint8_t reg, char out, char *in)
-{
-    int trans_ret;
-
-    trans_ret = spi_transfer_byte(dev, reg, in);
-    if (trans_ret < 0) {
-        return -1;
-    }
-    trans_ret = spi_transfer_byte(dev, out, in);
-    if (trans_ret < 0) {
-        return -1;
-    }
-
-    return 1;
-}
-
-int spi_transfer_regs(spi_t dev, uint8_t reg, char *out, char *in, unsigned int length)
-{
-    int trans_ret;
-
-    trans_ret = spi_transfer_byte(dev, reg, in);
-    if (trans_ret < 0) {
-        return -1;
-    }
-    trans_ret = spi_transfer_bytes(dev, out, in, length);
-    if (trans_ret < 0) {
-        return -1;
-    }
-
-    return trans_ret;
-}
-
 void spi_transmission_begin(spi_t dev, char reset_val)
 {
     if (dev < SPI_NUMOF) {