[FIXME] Resurrect boards.cpp for F2 and F1.

FIXME:

- F1 support currently appears to be failing in start_c.c, for some
  unknown reason. This will need to get sorted out later.

Add a new wirish namespace, and a sub-namespace wirish::priv::. Put a
bunch of board setup routines in this namespace, and declare them in
new wirish/boards_private.h. boards.cpp uses this to perform
initialization tasks in a portable way, with two new boards_setup.cpp
files under wirish/stm32f1 and wirish/stm32f2 handling the
series-specific details.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>

1 files changed, 141 insertions, 0 deletions

diff --git a/wirish/stm32f1/boards_setup.cpp b/wirish/stm32f1/boards_setup.cpp
new file mode 100644
index 0000000..4ee292a
--- /dev/null
+++ b/wirish/stm32f1/boards_setup.cpp
@@ -0,0 +1,141 @@
+/******************************************************************************
+ * 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.
+*****************************************************************************/
+
+/**
+ * @file wirish/stm32f1/boards_setup.cpp
+ * @author Marti Bolivar <mbolivar@leaflabs.com>
+ * @brief STM32F1 chip setup.
+ */
+
+#include <libmaple/rcc.h>
+#include <libmaple/gpio.h>
+#include <libmaple/adc.h>
+#include <libmaple/timer.h>
+#include <libmaple/usb_cdcacm.h>
+
+#include <board/board.h>
+
+/* FIXME: Reintroduce all "#if 0"'ed blocks once libmaple provides
+ * these definitions again. */
+
+namespace wirish {
+    namespace priv {
+
+        static stm32f1_rcc_pll_data pll_data = {RCC_PLLMUL_9};
+        rcc_pll_cfg board_pll_cfg = {RCC_PLLSRC_HSE, &pll_data};
+
+#if 0
+        static void config_adc(const adc_dev* dev);
+        static void config_timer(timer_dev*);
+#endif
+
+        void board_reset_pll(void) {
+            // TODO
+        }
+
+        void board_setup_clock_prescalers(void) {
+            rcc_set_prescaler(RCC_PRESCALER_AHB, RCC_AHB_SYSCLK_DIV_1);
+            rcc_set_prescaler(RCC_PRESCALER_APB1, RCC_APB1_HCLK_DIV_2);
+            rcc_set_prescaler(RCC_PRESCALER_APB2, RCC_APB2_HCLK_DIV_1);
+        }
+
+        void board_setup_gpio(void) {
+            gpio_init_all();
+            // Initialize AFIO here, too, so peripheral remaps and external
+            // interrupts work out of the box.
+            afio_init();
+        }
+
+        void board_setup_adc(void) {
+#if 0
+            rcc_set_prescaler(RCC_PRESCALER_ADC, RCC_ADCPRE_PCLK_DIV_6);
+            adc_foreach(config_adc);
+#endif
+        }
+
+        void board_setup_timers(void) {
+#if 0
+            timer_foreach(config_timer);
+#endif
+        }
+
+        void board_setup_usb(void) {
+#if 0
+            usb_cdcacm_enable(BOARD_USB_DISC_DEV, BOARD_USB_DISC_BIT);
+#endif
+        }
+
+        /*
+         * Auxiliary routines
+         */
+
+#if 0
+        static void config_adc(const adc_dev *dev) {
+            adc_init(dev);
+
+            adc_set_extsel(dev, ADC_SWSTART);
+            adc_set_exttrig(dev, true);
+
+            adc_enable(dev);
+            adc_calibrate(dev);
+            adc_set_sample_rate(dev, ADC_SMPR_55_5);
+        }
+
+        static void config_timer(timer_dev *dev) {
+            timer_adv_reg_map *regs = (dev->regs).adv;
+            const uint16 full_overflow = 0xFFFF;
+            const uint16 half_duty = 0x8FFF;
+
+            timer_init(dev);
+            timer_pause(dev);
+
+            regs->CR1 = TIMER_CR1_ARPE;
+            regs->PSC = 1;
+            regs->SR = 0;
+            regs->DIER = 0;
+            regs->EGR = TIMER_EGR_UG;
+
+            switch (dev->type) {
+            case TIMER_ADVANCED:
+                regs->BDTR = TIMER_BDTR_MOE | TIMER_BDTR_LOCK_OFF;
+                // fall-through
+            case TIMER_GENERAL:
+                timer_set_reload(dev, full_overflow);
+
+                for (int channel = 1; channel <= 4; channel++) {
+                    timer_set_compare(dev, channel, half_duty);
+                    timer_oc_set_mode(dev, channel, TIMER_OC_MODE_PWM_1, TIMER_OC_PE);
+                }
+                // fall-through
+            case TIMER_BASIC:
+                break;
+            }
+
+            timer_resume(dev);
+        }
+#endif
+    }
+}