nvm implementation for rp2040

5 files changed, 117 insertions, 5 deletions

diff --git a/ports/raspberrypi/common-hal/nvm/ByteArray.c b/ports/raspberrypi/common-hal/nvm/ByteArray.c
new file mode 100644
index 000000000..2aef1a09f
--- /dev/null
+++ b/ports/raspberrypi/common-hal/nvm/ByteArray.c
@@ -0,0 +1,72 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 microDev
+ *
+ * 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/nvm/ByteArray.h"
+
+#include <string.h>
+
+#include "py/runtime.h"
+#include "src/rp2_common/hardware_flash/include/hardware/flash.h"
+
+uint32_t common_hal_nvm_bytearray_get_length(nvm_bytearray_obj_t* self) {
+    return self->len;
+}
+
+static void write_page(uint32_t page_addr, uint32_t offset, uint32_t len, uint8_t* bytes) {
+    // Write a whole page to flash, buffering it first and then erasing and rewriting
+    // it since we can only clear a whole page at a time.
+    if (offset == 0 && len == FLASH_PAGE_SIZE) {
+        flash_range_program(page_addr - 0x10000000, bytes, FLASH_PAGE_SIZE);
+    } else {
+        uint8_t buffer[FLASH_PAGE_SIZE];
+        memcpy(buffer, (uint8_t*) page_addr, FLASH_PAGE_SIZE);
+        memcpy(buffer + offset, bytes, len);
+        flash_range_program(page_addr - 0x10000000, buffer, FLASH_PAGE_SIZE);
+    }
+}
+
+bool common_hal_nvm_bytearray_set_bytes(nvm_bytearray_obj_t* self,
+        uint32_t start_index, uint8_t* values, uint32_t len) {
+    uint32_t address = (uint32_t) self->start_address + start_index;
+    uint32_t offset = address % FLASH_PAGE_SIZE;
+    uint32_t page_addr = address - offset;
+
+    while (len) {
+        uint32_t write_len = MIN(len, FLASH_PAGE_SIZE - offset);
+        write_page(page_addr, offset, write_len, values);
+        len -= write_len;
+        values += write_len;
+        page_addr += FLASH_PAGE_SIZE;
+        offset = 0;
+    }
+
+    return true;
+}
+
+void common_hal_nvm_bytearray_get_bytes(nvm_bytearray_obj_t* self,
+        uint32_t start_index, uint32_t len, uint8_t* values) {
+    memcpy(values, self->start_address + start_index, len);
+}
diff --git a/ports/raspberrypi/common-hal/nvm/ByteArray.h b/ports/raspberrypi/common-hal/nvm/ByteArray.h
new file mode 100644
index 000000000..a2a904fea
--- /dev/null
+++ b/ports/raspberrypi/common-hal/nvm/ByteArray.h
@@ -0,0 +1,38 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 microDev
+ *
+ * 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_RASPBERRYPI_COMMON_HAL_NVM_BYTEARRAY_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_NVM_BYTEARRAY_H
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    uint8_t * start_address;
+    uint32_t len;
+} nvm_bytearray_obj_t;
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_NVM_BYTEARRAY_H
diff --git a/ports/raspberrypi/common-hal/nvm/__init__.c b/ports/raspberrypi/common-hal/nvm/__init__.c
new file mode 100644
index 000000000..1b702a158
--- /dev/null
+++ b/ports/raspberrypi/common-hal/nvm/__init__.c
@@ -0,0 +1 @@
+// No nvm module functions.
diff --git a/ports/raspberrypi/mpconfigport.h b/ports/raspberrypi/mpconfigport.h
index 77d1ff080..d57f1c575 100644
--- a/ports/raspberrypi/mpconfigport.h
+++ b/ports/raspberrypi/mpconfigport.h
@@ -27,15 +27,16 @@
 #ifndef __INCLUDED_MPCONFIGPORT_H
 #define __INCLUDED_MPCONFIGPORT_H
 
-#define MICROPY_PY_SYS_PLATFORM                     "RP2040"
+#define MICROPY_PY_SYS_PLATFORM             "RP2040"
 
-#define CIRCUITPY_INTERNAL_NVM_SIZE 0
+#define CIRCUITPY_INTERNAL_NVM_SIZE         (4*1024)
+#define CIRCUITPY_INTERNAL_NVM_START_ADDR   (0x100FF000)
 
-#define CIRCUITPY_DEFAULT_STACK_SIZE                (24*1024)
+#define CIRCUITPY_DEFAULT_STACK_SIZE        (24*1024)
 
 #define MICROPY_USE_INTERNAL_PRINTF         (1)
 
-#define CIRCUITPY_PROCESSOR_COUNT (2)
+#define CIRCUITPY_PROCESSOR_COUNT           (2)
 
 // This also includes mpconfigboard.h.
 #include "py/circuitpy_mpconfig.h"
diff --git a/ports/raspberrypi/mpconfigport.mk b/ports/raspberrypi/mpconfigport.mk
index 8681e2994..5477d7f1b 100644
--- a/ports/raspberrypi/mpconfigport.mk
+++ b/ports/raspberrypi/mpconfigport.mk
@@ -32,7 +32,7 @@ CIRCUITPY_AUDIOMP3 = 0
 CIRCUITPY_COUNTIO = 0  # Use PWM interally
 CIRCUITPY_FREQUENCYIO = 0 # Use PWM interally
 CIRCUITPY_I2CPERIPHERAL = 0
-CIRCUITPY_NVM = 0
+CIRCUITPY_NVM = 1
 CIRCUITPY_PULSEIO = 0 # Use PIO interally
 CIRCUITPY_ROTARYIO = 0 # Use PIO interally
 CIRCUITPY_WATCHDOG = 1