initial import

cores/esp32/Esp.cpp

@@ -0,0 +1,223 @@
+/*
+ Esp.cpp - ESP31B-specific APIs
+ Copyright (c) 2015 Ivan Grokhotkov. All rights reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "Arduino.h"
+#include "Esp.h"
+#include "rom/spi_flash.h"
+#include <memory>
+
+//#define DEBUG_SERIAL Serial
+
+
+/**
+ * User-defined Literals
+ *  usage:
+ *
+ *   uint32_t = test = 10_MHz; // --> 10000000
+ */
+
+unsigned long long operator"" _kHz(unsigned long long x)
+{
+    return x * 1000;
+}
+
+unsigned long long operator"" _MHz(unsigned long long x)
+{
+    return x * 1000 * 1000;
+}
+
+unsigned long long operator"" _GHz(unsigned long long x)
+{
+    return x * 1000 * 1000 * 1000;
+}
+
+unsigned long long operator"" _kBit(unsigned long long x)
+{
+    return x * 1024;
+}
+
+unsigned long long operator"" _MBit(unsigned long long x)
+{
+    return x * 1024 * 1024;
+}
+
+unsigned long long operator"" _GBit(unsigned long long x)
+{
+    return x * 1024 * 1024 * 1024;
+}
+
+unsigned long long operator"" _kB(unsigned long long x)
+{
+    return x * 1024;
+}
+
+unsigned long long operator"" _MB(unsigned long long x)
+{
+    return x * 1024 * 1024;
+}
+
+unsigned long long operator"" _GB(unsigned long long x)
+{
+    return x * 1024 * 1024 * 1024;
+}
+
+
+EspClass ESP;
+
+uint32_t EspClass::getCycleCount()
+{
+    uint32_t ccount;
+    __asm__ __volatile__("esync; rsr %0,ccount":"=a" (ccount));
+    return ccount;
+}
+
+void EspClass::restart(void)
+{
+    system_restart();
+}
+
+uint32_t EspClass::getFreeHeap(void)
+{
+    return system_get_free_heap_size();
+}
+
+const char * EspClass::getSdkVersion(void)
+{
+    return system_get_sdk_version();
+}
+
+uint32_t EspClass::getFlashChipSize(void)
+{
+    uint32_t data;
+    uint8_t * bytes = (uint8_t *) &data;
+    // read first 4 byte (magic byte + flash config)
+    if(SPIRead(0x0000, &data, 4) == SPI_FLASH_RESULT_OK) {
+        return magicFlashChipSize((bytes[3] & 0xf0) >> 4);
+    }
+    return 0;
+}
+
+uint32_t EspClass::getFlashChipSpeed(void)
+{
+    uint32_t data;
+    uint8_t * bytes = (uint8_t *) &data;
+    // read first 4 byte (magic byte + flash config)
+    if(SPIRead(0x0000, &data, 4) == SPI_FLASH_RESULT_OK) {
+        return magicFlashChipSpeed(bytes[3] & 0x0F);
+    }
+    return 0;
+}
+
+FlashMode_t EspClass::getFlashChipMode(void)
+{
+    FlashMode_t mode = FM_UNKNOWN;
+    uint32_t data;
+    uint8_t * bytes = (uint8_t *) &data;
+    // read first 4 byte (magic byte + flash config)
+    if(SPIRead(0x0000, &data, 4) == SPI_FLASH_RESULT_OK) {
+        mode = magicFlashChipMode(bytes[2]);
+    }
+    return mode;
+}
+
+uint32_t EspClass::magicFlashChipSize(uint8_t byte)
+{
+    switch(byte & 0x0F) {
+    case 0x0: // 4 Mbit (512KB)
+        return (512_kB);
+    case 0x1: // 2 MBit (256KB)
+        return (256_kB);
+    case 0x2: // 8 MBit (1MB)
+        return (1_MB);
+    case 0x3: // 16 MBit (2MB)
+        return (2_MB);
+    case 0x4: // 32 MBit (4MB)
+        return (4_MB);
+    case 0x5: // 64 MBit (8MB)
+        return (8_MB);
+    case 0x6: // 128 MBit (16MB)
+        return (16_MB);
+    case 0x7: // 256 MBit (32MB)
+        return (32_MB);
+    default: // fail?
+        return 0;
+    }
+}
+
+uint32_t EspClass::magicFlashChipSpeed(uint8_t byte)
+{
+    switch(byte & 0x0F) {
+    case 0x0: // 40 MHz
+        return (40_MHz);
+    case 0x1: // 26 MHz
+        return (26_MHz);
+    case 0x2: // 20 MHz
+        return (20_MHz);
+    case 0xf: // 80 MHz
+        return (80_MHz);
+    default: // fail?
+        return 0;
+    }
+}
+
+FlashMode_t EspClass::magicFlashChipMode(uint8_t byte)
+{
+    FlashMode_t mode = (FlashMode_t) byte;
+    if(mode > FM_DOUT) {
+        mode = FM_UNKNOWN;
+    }
+    return mode;
+}
+
+bool EspClass::eraseConfig(void)
+{
+    bool ret = true;
+    size_t cfgAddr = (getFlashChipSize() - 0x4000);
+    size_t cfgSize = (8*1024);
+
+    while(cfgSize) {
+
+        if(SPIEraseSector((cfgAddr / 4096)) != SPI_FLASH_RESULT_OK) {
+            ret = false;
+        }
+
+        cfgSize -= 4096;
+        cfgAddr += 4096;
+    }
+
+    return ret;
+}
+
+bool EspClass::flashEraseSector(uint32_t sector)
+{
+    int rc = SPIEraseSector(sector);
+    return rc == 0;
+}
+
+bool EspClass::flashWrite(uint32_t offset, uint32_t *data, size_t size)
+{
+    int rc = SPIWrite(offset, (uint32_t*) data, size);
+    return rc == 0;
+}
+
+bool EspClass::flashRead(uint32_t offset, uint32_t *data, size_t size)
+{
+    int rc = SPIRead(offset, (uint32_t*) data, size);
+    return rc == 0;
+}