Add basic analogio files

5 files changed, 236 insertions, 0 deletions

diff --git a/ports/stm32f4/common-hal/analogio/AnalogIn.c b/ports/stm32f4/common-hal/analogio/AnalogIn.c
new file mode 100644
index 000000000..f20802ac9
--- /dev/null
+++ b/ports/stm32f4/common-hal/analogio/AnalogIn.c
@@ -0,0 +1,112 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Dan Halbert for Adafruit Industries
+ * Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
+ *
+ * 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 "common-hal/analogio/AnalogIn.h"
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+#include "nrfx_saadc.h"
+#include "nrf_gpio.h"
+
+#define CHANNEL_NO 0
+
+void common_hal_analogio_analogin_construct(analogio_analogin_obj_t *self, const mcu_pin_obj_t *pin) {
+    if (pin->adc_channel == 0)
+        mp_raise_ValueError(translate("Pin does not have ADC capabilities"));
+
+    nrf_gpio_cfg_default(pin->number);
+
+    claim_pin(pin);
+    self->pin = pin;
+}
+
+bool common_hal_analogio_analogin_deinited(analogio_analogin_obj_t *self) {
+    return self->pin == mp_const_none;
+}
+
+void common_hal_analogio_analogin_deinit(analogio_analogin_obj_t *self) {
+    if (common_hal_analogio_analogin_deinited(self))
+        return;
+
+    nrf_gpio_cfg_default(self->pin->number);
+
+    reset_pin_number(self->pin->number);
+    self->pin = mp_const_none;
+}
+
+uint16_t common_hal_analogio_analogin_get_value(analogio_analogin_obj_t *self) {
+    // Something else might have used the ADC in a different way,
+    // so we completely re-initialize it.
+
+    nrf_saadc_value_t value;
+
+    const nrf_saadc_channel_config_t config = {
+        .resistor_p = NRF_SAADC_RESISTOR_DISABLED,
+        .resistor_n = NRF_SAADC_RESISTOR_DISABLED,
+        .gain = NRF_SAADC_GAIN1_6,
+        .reference = NRF_SAADC_REFERENCE_INTERNAL,
+        .acq_time = NRF_SAADC_ACQTIME_3US,
+        .mode = NRF_SAADC_MODE_SINGLE_ENDED,
+        .burst = NRF_SAADC_BURST_DISABLED,
+        .pin_p = self->pin->adc_channel,
+        .pin_n = self->pin->adc_channel,
+    };
+
+    nrf_saadc_resolution_set(NRF_SAADC_RESOLUTION_14BIT);
+    nrf_saadc_oversample_set(NRF_SAADC_OVERSAMPLE_DISABLED);
+    nrf_saadc_enable();
+
+    for (uint32_t i = 0; i < NRF_SAADC_CHANNEL_COUNT; i++)
+        nrf_saadc_channel_input_set(i, NRF_SAADC_INPUT_DISABLED, NRF_SAADC_INPUT_DISABLED);
+
+    nrf_saadc_channel_init(CHANNEL_NO, &config);
+    nrf_saadc_buffer_init(&value, 1);
+
+    nrf_saadc_task_trigger(NRF_SAADC_TASK_START);
+    while (nrf_saadc_event_check(NRF_SAADC_EVENT_STARTED) == 0);
+    nrf_saadc_event_clear(NRF_SAADC_EVENT_STARTED);
+
+    nrf_saadc_task_trigger(NRF_SAADC_TASK_SAMPLE);
+    while (nrf_saadc_event_check(NRF_SAADC_EVENT_END) == 0);
+    nrf_saadc_event_clear(NRF_SAADC_EVENT_END);
+
+    nrf_saadc_task_trigger(NRF_SAADC_TASK_STOP);
+    while (nrf_saadc_event_check(NRF_SAADC_EVENT_STOPPED) == 0);
+    nrf_saadc_event_clear(NRF_SAADC_EVENT_STOPPED);
+
+    nrf_saadc_disable();
+
+    if (value < 0)
+        value = 0;
+
+    // Map value to from 14 to 16 bits
+    return (value << 2);
+}
+
+float common_hal_analogio_analogin_get_reference_voltage(analogio_analogin_obj_t *self) {
+    return 3.3f;
+}
diff --git a/ports/stm32f4/common-hal/analogio/AnalogIn.h b/ports/stm32f4/common-hal/analogio/AnalogIn.h
new file mode 100644
index 000000000..e0e95bad4
--- /dev/null
+++ b/ports/stm32f4/common-hal/analogio/AnalogIn.h
@@ -0,0 +1,39 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Scott Shawcroft
+ *
+ * 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.
+ */
+
+#ifndef MICROPY_INCLUDED_NRF_COMMON_HAL_ANALOGIO_ANALOGIN_H
+#define MICROPY_INCLUDED_NRF_COMMON_HAL_ANALOGIO_ANALOGIN_H
+
+#include "common-hal/microcontroller/Pin.h"
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    const mcu_pin_obj_t * pin;
+} analogio_analogin_obj_t;
+
+#endif // MICROPY_INCLUDED_NRF_COMMON_HAL_ANALOGIO_ANALOGIN_H
diff --git a/ports/stm32f4/common-hal/analogio/AnalogOut.c b/ports/stm32f4/common-hal/analogio/AnalogOut.c
new file mode 100644
index 000000000..adafa15d5
--- /dev/null
+++ b/ports/stm32f4/common-hal/analogio/AnalogOut.c
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Dan Halbert for Adafruit Industries
+ *
+ * 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 "shared-bindings/analogio/AnalogOut.h"
+
+#include <stdint.h>
+#include <string.h>
+
+#include "py/mperrno.h"
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+void common_hal_analogio_analogout_construct(analogio_analogout_obj_t* self, const mcu_pin_obj_t *pin) {
+    mp_raise_RuntimeError(translate("AnalogOut functionality not supported"));
+}
+
+bool common_hal_analogio_analogout_deinited(analogio_analogout_obj_t *self) {
+    return true;
+}
+
+void common_hal_analogio_analogout_deinit(analogio_analogout_obj_t *self) {
+}
+
+void common_hal_analogio_analogout_set_value(analogio_analogout_obj_t *self, uint16_t value) {
+}
diff --git a/ports/stm32f4/common-hal/analogio/AnalogOut.h b/ports/stm32f4/common-hal/analogio/AnalogOut.h
new file mode 100644
index 000000000..3244ee33b
--- /dev/null
+++ b/ports/stm32f4/common-hal/analogio/AnalogOut.h
@@ -0,0 +1,36 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Scott Shawcroft
+ *
+ * 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.
+ */
+
+#ifndef MICROPY_INCLUDED_NRF_COMMON_HAL_ANALOGIO_ANALOGOUT_H
+#define MICROPY_INCLUDED_NRF_COMMON_HAL_ANALOGIO_ANALOGOUT_H
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+} analogio_analogout_obj_t;
+
+#endif // MICROPY_INCLUDED_NRF_COMMON_HAL_ANALOGIO_ANALOGOUT_H
diff --git a/ports/stm32f4/common-hal/analogio/__init__.c b/ports/stm32f4/common-hal/analogio/__init__.c
new file mode 100644
index 000000000..eea58c77d
--- /dev/null
+++ b/ports/stm32f4/common-hal/analogio/__init__.c
@@ -0,0 +1 @@
+// No analogio module functions.