nrf: protomatter port

Author: jepler

lib/protomatter

@@ -0,0 +1,66 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Jeff Epler 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 <stddef.h>
+
+#include "common-hal/_protomatter/Protomatter.h"
+
+#include "peripherals/nrf/timers.h"
+
+extern void _PM_IRQ_HANDLER(void);
+
+void *common_hal_protomatter_timer_allocate() {
+    nrfx_timer_t *timer = nrf_peripherals_allocate_timer_or_throw();
+    nrf_peripherals_timer_never_reset(timer);
+    return timer->p_reg;
+}
+
+
+static void protomatter_event_handler(nrf_timer_event_t event_type, void *p_context) {
+    _PM_IRQ_HANDLER();
+}
+
+void common_hal_protomatter_timer_enable(void* ptr) {
+    nrfx_timer_t *timer = nrf_peripherals_timer_from_reg(ptr);
+    static const nrfx_timer_config_t timer_config = {
+        .frequency = NRF_TIMER_FREQ_16MHz,
+        .mode = NRF_TIMER_MODE_TIMER,
+        .bit_width = NRF_TIMER_BIT_WIDTH_16,
+        .interrupt_priority = NRFX_TIMER_DEFAULT_CONFIG_IRQ_PRIORITY,
+        .p_context = NULL,
+    };
+    nrfx_timer_init(timer, &timer_config, &protomatter_event_handler);
+}
+
+void common_hal_protomatter_timer_disable(void* ptr) {
+    nrfx_timer_t *timer = nrf_peripherals_timer_from_reg(ptr);
+    nrfx_timer_uninit(timer);
+}
+
+void common_hal_protomatter_timer_free(void* ptr) {
+    nrfx_timer_t *timer = nrf_peripherals_timer_from_reg(ptr);
+    nrf_peripherals_free_timer(timer);
+}

ports/nrf/common-hal/_protomatter/Protomatter.c

@@ -0,0 +1,35 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Jeff Epler 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.
+ */
+
+#ifndef MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_PROTOMATTER_PROTOMATTER_H
+#define MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_PROTOMATTER_PROTOMATTER_H
+
+void *common_hal_protomatter_timer_allocate(void);
+void common_hal_protomatter_timer_enable(void*);
+void common_hal_protomatter_timer_disable(void*);
+void common_hal_protomatter_timer_free(void*);
+
+#endif

ports/nrf/common-hal/_protomatter/Protomatter.h

@@ -196,3 +196,15 @@ bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t *pin) {
     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) {
+    claim_pin(pin);
+}
+
+void common_hal_mcu_pin_reset_number(uint8_t pin_no) {
+    reset_pin_number(pin_no);
+}

ports/nrf/common-hal/_protomatter/__init__.c

@@ -102,10 +102,7 @@ void pulseout_reset() {
 void common_hal_pulseio_pulseout_construct(pulseio_pulseout_obj_t* self,
                                            const pulseio_pwmout_obj_t* carrier) {
     if (refcount == 0) {
-        timer = nrf_peripherals_allocate_timer();
-        if (timer == NULL) {
-            mp_raise_RuntimeError(translate("All timers in use"));
-        }
+        timer = nrf_peripherals_allocate_timer_or_throw();
     }
     refcount++;
 

ports/nrf/common-hal/microcontroller/Pin.c

@@ -51,6 +51,9 @@ endif
 # frequencyio not yet implemented
 CIRCUITPY_FREQUENCYIO = 0
 
+CIRCUITPY_PROTOMATTER = 1
+CIRCUITPY_FRAMEBUFFERIO = 1
+
 # nRF52840-specific
 
 ifeq ($(MCU_CHIP),nrf52840)

ports/nrf/common-hal/pulseio/PulseOut.c

@@ -25,6 +25,7 @@
  */
 
 #include "common-hal/pulseio/PulseOut.h"
+#include "peripherals/nrf/timers.h"
 
 #include <stdint.h>
 
@@ -54,14 +55,47 @@ STATIC nrfx_timer_t nrfx_timers[] = {
 };
 
 static bool nrfx_timer_allocated[ARRAY_SIZE(nrfx_timers)];
+static bool nrfx_timer_never_reset[ARRAY_SIZE(nrfx_timers)];
 
 void timers_reset(void) {
     for (size_t i = 0; i < ARRAY_SIZE(nrfx_timers); i ++) {
+        if (nrfx_timer_never_reset[i]) {
+            continue;
+        }
         nrfx_timer_uninit(&nrfx_timers[i]);
         nrfx_timer_allocated[i] = false;
     }
 }
 
+void nrf_peripherals_timer_never_reset(nrfx_timer_t* timer) {
+    int idx = nrf_peripherals_timer_idx_from_timer(timer);
+    nrfx_timer_never_reset[idx] = true;
+}
+
+void nrf_peripherals_timer_reset_ok(nrfx_timer_t* timer) {
+    int idx = nrf_peripherals_timer_idx_from_timer(timer);
+    nrfx_timer_never_reset[idx] = false;
+}
+
+nrfx_timer_t* nrf_peripherals_timer_from_reg(NRF_TIMER_Type* ptr) {
+    for (size_t i = 0; i < ARRAY_SIZE(nrfx_timers); i ++) {
+        if (nrfx_timers[i].p_reg == ptr) {
+            return &nrfx_timers[i];
+        }
+    }
+    return NULL;
+}
+
+size_t nrf_peripherals_timer_idx_from_timer(nrfx_timer_t* ptr) {
+    for (size_t i = 0; i < ARRAY_SIZE(nrfx_timers); i ++) {
+        if (&nrfx_timers[i] == ptr) {
+            return i;
+        }
+    }
+    return ~(size_t)0;
+}
+
+
 // Returns a free nrfx_timer instance, and marks it as allocated.
 // The caller should init as with the desired config.
 // Returns NULL if no timer is available.
@@ -75,14 +109,21 @@ nrfx_timer_t* nrf_peripherals_allocate_timer(void) {
     return NULL;
 }
 
+nrfx_timer_t* nrf_peripherals_allocate_timer_or_throw(void) {
+    nrfx_timer_t* result = nrf_peripherals_allocate_timer();
+    if (!result) {
+        mp_raise_RuntimeError(translate("All timers in use"));
+    }
+    return result;
+}
+
 // Free a timer, which may or may not have been initialized.
 void nrf_peripherals_free_timer(nrfx_timer_t* timer) {
-    for (size_t i = 0; i < ARRAY_SIZE(nrfx_timers); i ++) {
-        if (timer == &nrfx_timers[i]) {
-            nrfx_timer_allocated[i] = false;
-            // Safe to call even if not initialized.
-            nrfx_timer_uninit(timer);
-            return;
-        }
+    size_t idx = nrf_peripherals_timer_idx_from_timer(timer);
+    if (idx != ~(size_t)0) {
+        nrfx_timer_allocated[idx] = false;
+        nrfx_timer_never_reset[idx] = false;
+        // Safe to call even if not initialized.
+        nrfx_timer_uninit(timer);
     }
 }

ports/nrf/mpconfigport.mk

@@ -29,4 +29,9 @@
 
 void timers_reset(void);
 nrfx_timer_t* nrf_peripherals_allocate_timer(void);
+nrfx_timer_t* nrf_peripherals_allocate_timer_or_throw(void);
 void nrf_peripherals_free_timer(nrfx_timer_t* timer);
+void nrf_peripherals_timer_never_reset(nrfx_timer_t* timer);
+void nrf_peripherals_timer_reset_ok(nrfx_timer_t* timer);
+nrfx_timer_t* nrf_peripherals_timer_from_reg(NRF_TIMER_Type* ptr);
+size_t nrf_peripherals_timer_idx_from_timer(nrfx_timer_t* ptr);