atmel-samd: Rename module classes so they don't conflict with names from ASF.

1 files changed, 139 insertions, 0 deletions

diff --git a/atmel-samd/modmachine_adc.c b/atmel-samd/modmachine_adc.c
new file mode 100644
index 000000000..ac5e6a6f6
--- /dev/null
+++ b/atmel-samd/modmachine_adc.c
@@ -0,0 +1,139 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013, 2014 Damien P. George
+ *
+ * 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.
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "py/nlr.h"
+#include "py/runtime.h"
+#include "py/binary.h"
+#include "py/mphal.h"
+#include "modmachine_adc.h"
+#include "modmachine_pin.h"
+
+#include "asf/sam0/drivers/adc/adc.h"
+
+/// \moduleref machine
+/// \class ADC - analog to digital conversion: read analog values on a pin
+///
+/// Usage:
+///
+///     adc = machine.ADC(pin)              # create an analog object from a pin
+///     val = adc.read()                    # read an analog value
+
+typedef struct {
+    mp_obj_base_t base;
+    pin_obj_t * pin;
+    struct adc_module adc_instance;
+} adc_obj_t;
+
+/******************************************************************************/
+/* Micro Python bindings : adc object (single channel)                        */
+
+STATIC void adc_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
+    adc_obj_t *self = self_in;
+    mp_print_str(print, "<ADC on ");
+    mp_obj_print_helper(print, self->pin, PRINT_STR);
+}
+
+
+STATIC void adc_init_single(adc_obj_t *adc_obj) {
+  struct adc_config config_adc;
+  adc_get_config_defaults(&config_adc);
+
+  config_adc.positive_input = adc_obj->pin->adc_input;
+  config_adc.resolution = ADC_RESOLUTION_CUSTOM;
+  config_adc.accumulate_samples = ADC_ACCUMULATE_SAMPLES_16;
+  config_adc.divide_result = ADC_DIVIDE_RESULT_16;
+  config_adc.clock_prescaler = ADC_CLOCK_PRESCALER_DIV128;
+
+  adc_init(&adc_obj->adc_instance, ADC, &config_adc);
+}
+
+/// \classmethod \constructor(pin)
+/// Create an ADC object associated with the given pin.
+/// This allows you to then read analog values on that pin.
+STATIC mp_obj_t adc_make_new(const mp_obj_type_t *type, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
+    // check number of arguments
+    mp_arg_check_num(n_args, n_kw, 1, 1, false);
+
+    // 1st argument is the pin name
+    mp_obj_t pin_obj = args[0];
+
+    const pin_obj_t *pin = pin_find(pin_obj);
+    if (!pin->has_adc) {
+        // No ADC function on that pin
+        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "pin %q does not have ADC capabilities", pin->name));
+    }
+
+    adc_obj_t *o = m_new_obj(adc_obj_t);
+    memset(o, 0, sizeof(*o));
+    o->base.type = &adc_type;
+    o->pin = pin_obj;
+    adc_init_single(o);
+
+    return o;
+}
+
+/// \method read()
+/// Read the value on the analog pin and return it.  The returned value
+/// will be between 0 and 4095.
+// TODO(tannewt): Don't turn it all on just for one read. This simplifies
+// handling of reading multiple inputs and surviving sleep though so for now its
+// ok.
+STATIC mp_obj_t mp_adc_read(mp_obj_t self_in) {
+    adc_obj_t *self = self_in;
+
+    adc_enable(&self->adc_instance);
+    adc_start_conversion(&self->adc_instance);
+
+    uint16_t data;
+    enum status_code status = adc_read(&self->adc_instance, &data);
+    while (status == STATUS_BUSY) {
+      status = adc_read(&self->adc_instance, &data);
+    }
+    if (status == STATUS_ERR_OVERFLOW) {
+      // TODO(tannewt): Throw an error.
+    }
+
+    adc_disable(&self->adc_instance);
+    return mp_obj_new_int(data);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(adc_read_obj, mp_adc_read);
+
+STATIC const mp_map_elem_t adc_locals_dict_table[] = {
+    { MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&adc_read_obj},
+};
+
+STATIC MP_DEFINE_CONST_DICT(adc_locals_dict, adc_locals_dict_table);
+
+const mp_obj_type_t adc_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_ADC,
+    .print = adc_print,
+    .make_new = adc_make_new,
+    .locals_dict = (mp_obj_t)&adc_locals_dict,
+};