1 files changed, 130 insertions, 0 deletions
diff --git a/wirish/stm32f2/wirish_digital.cpp b/wirish/stm32f2/wirish_digital.cpp
new file mode 100644
index 0000000..a67111d
--- /dev/null
+++ b/wirish/stm32f2/wirish_digital.cpp
@@ -0,0 +1,130 @@
+/******************************************************************************
+ * The MIT License
+ *
+ * Copyright (c) 2012 LeafLabs, LLC.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *****************************************************************************/
+
+/*
+ * STM32F2 implementations for basic GPIO functionality.
+ */
+
+#include <wirish/io.h>
+
+#include <libmaple/gpio.h>
+#include <libmaple/timer.h>
+
+#include <wirish/boards.h>
+
+void pinMode(uint8 pin, WiringPinMode w_mode) {
+    if (pin >= BOARD_NR_GPIO_PINS) {
+        return;
+    }
+
+    gpio_pin_mode mode;
+    // People always do the silly pin-toggle speed benchmark, so let's
+    // accomodate them:
+    unsigned flags = GPIO_MODEF_SPEED_HIGH;
+    bool pwm = false;
+    switch(w_mode) {
+    case OUTPUT:
+        mode = GPIO_MODE_OUTPUT;
+        break;
+    case OUTPUT_OPEN_DRAIN:
+        mode = GPIO_MODE_OUTPUT;
+        flags |= GPIO_MODEF_TYPE_OD;
+        break;
+    case INPUT:
+    case INPUT_FLOATING:
+        mode = GPIO_MODE_INPUT;
+        break;
+    case INPUT_ANALOG:
+        mode = GPIO_MODE_ANALOG;
+        break;
+    case INPUT_PULLUP:
+        mode = GPIO_MODE_INPUT;
+        flags |= GPIO_MODEF_PUPD_PU;
+        break;
+    case INPUT_PULLDOWN:
+        mode = GPIO_MODE_INPUT;
+        flags |= GPIO_MODEF_PUPD_PD;
+        break;
+    case PWM:
+        mode = GPIO_MODE_AF;
+        pwm = true;
+        break;
+    case PWM_OPEN_DRAIN:
+        mode = GPIO_MODE_AF;
+        flags |= GPIO_MODEF_TYPE_OD;
+        pwm = true;
+        break;
+    default:
+        ASSERT(0);              // Can't happen
+        return;
+    }
+
+    const stm32_pin_info *info = &PIN_MAP[pin];
+
+    if (pwm) {
+        /* If enabling PWM, tell the timer to do PWM, and tell the pin
+         * to listen to the right timer. */
+        ASSERT(info->timer_device != NULL);
+        if (info->timer_device == NULL) {
+            return;
+        }
+        gpio_af timer_af;
+        /* TODO make this code a <libmaple/timer.h> convenience
+         * routine for series that support GPIO alternate
+         * functions. */
+        switch(info->timer_device->clk_id) {
+        case RCC_TIMER1:        // fall-through
+        case RCC_TIMER2:
+            timer_af = GPIO_AF_TIM_1_2;
+            break;
+        case RCC_TIMER3:        // fall-through
+        case RCC_TIMER4:        // ...
+        case RCC_TIMER5:
+            timer_af = GPIO_AF_TIM_3_4_5;
+            break;
+        /* Timers 6 and 7 don't have any capture/compare, so they
+         * can't do PWM (and in fact have no AF values). */
+        case RCC_TIMER8:        // fall-through
+        case RCC_TIMER9:        // ...
+        case RCC_TIMER10:       // ...
+        case RCC_TIMER11:
+            timer_af = GPIO_AF_TIM_8_9_10_11;
+            break;
+        case RCC_TIMER12:       // fall-through
+        case RCC_TIMER13:       // ...
+        case RCC_TIMER14:
+            timer_af = GPIO_AF_CAN_1_2_TIM_12_13_14;
+            break;
+        default:
+            ASSERT(0);          // Can't happen
+            return;
+        }
+        timer_set_mode(info->timer_device, info->timer_channel, TIMER_PWM);
+        gpio_set_af(info->gpio_device, info->gpio_bit, timer_af);
+    } else {
+        gpio_set_modef(info->gpio_device, info->gpio_bit, mode, flags);
+    }
+}