Merge pull request #3829 from DipSwitch/spi_set_pin_speed

cpu/stm32l1-f0/spi: Configure the SPI pins as highspeed

cpu/stm32f0/periph/spi.c

@@ -151,6 +151,7 @@ int spi_conf_pins(spi_t dev)
     for (int i = 0; i < 3; i++) {
         port->MODER &= ~(3 << (pin[i] * 2));
         port->MODER |= (2 << (pin[i] * 2));
+        port->OSPEEDR |= (3 << (pin[i] * 2));
         int hl = (pin[i] < 8) ? 0 : 1;
         port->AFR[hl] &= ~(0xf << ((pin[i] - (hl * 8)) * 4));
         port->AFR[hl] |= (af << ((pin[i] - (hl * 8)) * 4));

cpu/stm32l1/periph/spi.c

@@ -147,6 +147,7 @@ int spi_conf_pins(spi_t dev)
     for (int i = 0; i < 3; i++) {
         port->MODER &= ~(3 << (pin[i] * 2));
         port->MODER |= (2 << (pin[i] * 2));
+        port->OSPEEDR |= (3 << (pin[i] * 2));
         int hl = (pin[i] < 8) ? 0 : 1;
         port->AFR[hl] &= ~(0xf << ((pin[i] - (hl * 8)) * 4));
         port->AFR[hl] |= (af << ((pin[i] - (hl * 8)) * 4));