Merge pull request #39 from adafruit/main

Merge from adafruit main for RP2040

1 files changed, 190 insertions, 0 deletions

diff --git a/ports/raspberrypi/common-hal/microcontroller/Pin.c b/ports/raspberrypi/common-hal/microcontroller/Pin.c
new file mode 100644
index 000000000..90c327406
--- /dev/null
+++ b/ports/raspberrypi/common-hal/microcontroller/Pin.c
@@ -0,0 +1,190 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 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 "py/runtime.h"
+
+#include "shared-bindings/microcontroller/Pin.h"
+
+#include "supervisor/shared/rgb_led_status.h"
+
+#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
+
+#ifdef MICROPY_HW_NEOPIXEL
+bool neopixel_in_use;
+#endif
+#ifdef MICROPY_HW_APA102_MOSI
+bool apa102_sck_in_use;
+bool apa102_mosi_in_use;
+#endif
+#ifdef SPEAKER_ENABLE_PIN
+bool speaker_enable_in_use;
+#endif
+
+STATIC uint32_t never_reset_pins;
+
+void reset_all_pins(void) {
+    for (size_t i = 0; i < 30; i++) {
+        if ((never_reset_pins & (1 << i)) != 0) {
+            continue;
+        }
+        reset_pin_number(i);
+    }
+}
+
+void never_reset_pin_number(uint8_t pin_number) {
+    if (pin_number >= 32) {
+        return;
+    }
+
+    never_reset_pins |= 1 << pin_number;
+}
+
+void reset_pin_number(uint8_t pin_number) {
+    if (pin_number >= 32
+#if TUD_OPT_RP2040_USB_DEVICE_ENUMERATION_FIX
+    // Pin 15 is used for Errata so we don't mess with it.
+        || pin_number == 15
+#endif
+        ) {
+        return;
+    }
+
+    never_reset_pins &= ~(1 << pin_number);
+
+    // We are very aggressive in shutting down the pad fully. Both pulls are
+    // disabled and both buffers are as well.
+    gpio_init(pin_number);
+    hw_clear_bits(&padsbank0_hw->io[pin_number], PADS_BANK0_GPIO0_IE_BITS |
+                                                 PADS_BANK0_GPIO0_PUE_BITS |
+                                                 PADS_BANK0_GPIO0_PDE_BITS);
+    hw_set_bits(&padsbank0_hw->io[pin_number], PADS_BANK0_GPIO0_OD_BITS);
+
+    #ifdef MICROPY_HW_NEOPIXEL
+    if (pin_number == MICROPY_HW_NEOPIXEL->number) {
+        neopixel_in_use = false;
+        rgb_led_status_init();
+        return;
+    }
+    #endif
+    #ifdef MICROPY_HW_APA102_MOSI
+    if (pin_number == MICROPY_HW_APA102_MOSI->number ||
+        pin_number == MICROPY_HW_APA102_SCK->number) {
+        apa102_mosi_in_use = apa102_mosi_in_use && pin_number != MICROPY_HW_APA102_MOSI->number;
+        apa102_sck_in_use = apa102_sck_in_use && pin_number != MICROPY_HW_APA102_SCK->number;
+        if (!apa102_sck_in_use && !apa102_mosi_in_use) {
+            rgb_led_status_init();
+        }
+        return;
+    }
+    #endif
+
+    #ifdef SPEAKER_ENABLE_PIN
+    if (pin_number == SPEAKER_ENABLE_PIN->number) {
+        speaker_enable_in_use = false;
+    }
+    #endif
+}
+
+void common_hal_never_reset_pin(const mcu_pin_obj_t* pin) {
+    never_reset_pin_number(pin->number);
+}
+
+void common_hal_reset_pin(const mcu_pin_obj_t* pin) {
+    reset_pin_number(pin->number);
+}
+
+void claim_pin(const mcu_pin_obj_t* pin) {
+    #ifdef MICROPY_HW_NEOPIXEL
+    if (pin == MICROPY_HW_NEOPIXEL) {
+        neopixel_in_use = true;
+    }
+    #endif
+    #ifdef MICROPY_HW_APA102_MOSI
+    if (pin == MICROPY_HW_APA102_MOSI) {
+        apa102_mosi_in_use = true;
+    }
+    if (pin == MICROPY_HW_APA102_SCK) {
+        apa102_sck_in_use = true;
+    }
+    #endif
+
+    #ifdef SPEAKER_ENABLE_PIN
+    if (pin == SPEAKER_ENABLE_PIN) {
+        speaker_enable_in_use = true;
+    }
+    #endif
+}
+
+bool pin_number_is_free(uint8_t pin_number) {
+    if (pin_number >= 30) {
+        return false;
+    }
+#if TUD_OPT_RP2040_USB_DEVICE_ENUMERATION_FIX
+    // Pin 15 is used for Errata so we don't mess with it.
+    if (pin_number == 15) {
+        return true;
+    }
+#endif
+    uint32_t pad_state = padsbank0_hw->io[pin_number];
+    return (pad_state & PADS_BANK0_GPIO0_IE_BITS) == 0 &&
+           (pad_state & PADS_BANK0_GPIO0_OD_BITS) != 0;
+}
+
+bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t* pin) {
+    #ifdef MICROPY_HW_NEOPIXEL
+    if (pin == MICROPY_HW_NEOPIXEL) {
+        return !neopixel_in_use;
+    }
+    #endif
+    #ifdef MICROPY_HW_APA102_MOSI
+    if (pin == MICROPY_HW_APA102_MOSI) {
+        return !apa102_mosi_in_use;
+    }
+    if (pin == MICROPY_HW_APA102_SCK) {
+        return !apa102_sck_in_use;
+    }
+    #endif
+
+    #ifdef SPEAKER_ENABLE_PIN
+    if (pin == SPEAKER_ENABLE_PIN) {
+        return !speaker_enable_in_use;
+    }
+    #endif
+
+    return pin_number_is_free(pin->number);
+}
+
+uint8_t common_hal_mcu_pin_number(const mcu_pin_obj_t* pin) {
+    return pin->number;
+}
+
+void common_hal_mcu_pin_claim(const mcu_pin_obj_t* pin) {
+    return claim_pin(pin);
+}
+
+void common_hal_mcu_pin_reset_number(uint8_t pin_no) {
+    reset_pin_number(pin_no);
+}