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Merged
merged 3 commits into from
Feb 23, 2017
Merged

Improvements in EspClass #222

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84ddcdb
Improvements in EspClass
arcao Feb 18, 2017
9aec057
Rename getCpuRevision function to getChipRevision
arcao Feb 18, 2017
51c795c
Revert: flashRead / flashWrite supports encrypted flash
arcao Feb 18, 2017
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74 changes: 40 additions & 34 deletions cores/esp32/Esp.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -23,9 +23,22 @@
#include "esp_deep_sleep.h"
#include "esp_spi_flash.h"
#include <memory>

//#define DEBUG_SERIAL Serial

#include <soc/soc.h>
#include <soc/efuse_reg.h>

/* Main header of binary image */
typedef struct {
uint8_t magic;
uint8_t segment_count;
uint8_t spi_mode; /* flash read mode (esp_image_spi_mode_t as uint8_t) */
uint8_t spi_speed: 4; /* flash frequency (esp_image_spi_freq_t as uint8_t) */
uint8_t spi_size: 4; /* flash chip size (esp_image_flash_size_t as uint8_t) */
uint32_t entry_addr;
uint8_t encrypt_flag; /* encrypt flag */
uint8_t extra_header[15]; /* ESP32 additional header, unused by second bootloader */
} esp_image_header_t;

#define ESP_IMAGE_HEADER_MAGIC 0xE9

/**
* User-defined Literals
Expand Down Expand Up @@ -104,64 +117,56 @@ uint32_t EspClass::getFreeHeap(void)
return esp_get_free_heap_size();
}

uint8_t EspClass::getChipRevision(void)
{
return (REG_READ(EFUSE_BLK0_RDATA3_REG) >> EFUSE_RD_CHIP_VER_RESERVE_S) && EFUSE_RD_CHIP_VER_RESERVE_V;
}

const char * EspClass::getSdkVersion(void)
{
return esp_get_idf_version();
}

uint32_t EspClass::getFlashChipSize(void)
{
uint32_t data;
uint8_t * bytes = (uint8_t *) &data;
// read first 4 byte (magic byte + flash config)
if(flashRead(0x0000, &data, 4) == ESP_OK) {
return magicFlashChipSize((bytes[3] & 0xf0) >> 4);
esp_image_header_t fhdr;
if(flashRead(0x1000, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
return 0;
}
return 0;
return magicFlashChipSize(fhdr.spi_size);
}

uint32_t EspClass::getFlashChipSpeed(void)
{
uint32_t data;
uint8_t * bytes = (uint8_t *) &data;
// read first 4 byte (magic byte + flash config)
if(flashRead(0x0000, &data, 4) == ESP_OK) {
return magicFlashChipSpeed(bytes[3] & 0x0F);
esp_image_header_t fhdr;
if(flashRead(0x1000, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
return 0;
}
return 0;
return magicFlashChipSpeed(fhdr.spi_speed);
}

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(flashRead(0x0000, &data, 4) == ESP_OK) {
mode = magicFlashChipMode(bytes[2]);
esp_image_header_t fhdr;
if(flashRead(0x1000, (uint32_t*)&fhdr, sizeof(esp_image_header_t)) && fhdr.magic != ESP_IMAGE_HEADER_MAGIC) {
return FM_UNKNOWN;
}
return mode;
return magicFlashChipMode(fhdr.spi_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)
case 0x0: // 8 MBit (1MB)
return (1_MB);
case 0x3: // 16 MBit (2MB)
case 0x1: // 16 MBit (2MB)
return (2_MB);
case 0x4: // 32 MBit (4MB)
case 0x2: // 32 MBit (4MB)
return (4_MB);
case 0x5: // 64 MBit (8MB)
case 0x3: // 64 MBit (8MB)
return (8_MB);
case 0x6: // 128 MBit (16MB)
case 0x4: // 128 MBit (16MB)
return (16_MB);
case 0x7: // 256 MBit (32MB)
return (32_MB);
default: // fail?
return 0;
}
Expand All @@ -186,7 +191,7 @@ uint32_t EspClass::magicFlashChipSpeed(uint8_t byte)
FlashMode_t EspClass::magicFlashChipMode(uint8_t byte)
{
FlashMode_t mode = (FlashMode_t) byte;
if(mode > FM_DOUT) {
if(mode > FM_SLOW_READ) {
mode = FM_UNKNOWN;
}
return mode;
Expand All @@ -197,6 +202,7 @@ bool EspClass::flashEraseSector(uint32_t sector)
return spi_flash_erase_sector(sector) == ESP_OK;
}

// Warning: These functions do not work with encrypted flash
bool EspClass::flashWrite(uint32_t offset, uint32_t *data, size_t size)
{
return spi_flash_write(offset, (uint32_t*) data, size) == ESP_OK;
Expand Down
3 changes: 3 additions & 0 deletions cores/esp32/Esp.h
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,8 @@ typedef enum {
FM_QOUT = 0x01,
FM_DIO = 0x02,
FM_DOUT = 0x03,
FM_FAST_READ = 0x04,
FM_SLOW_READ = 0x05,
FM_UNKNOWN = 0xff
} FlashMode_t;

Expand All @@ -55,6 +57,7 @@ class EspClass
~EspClass() {}
void restart();
uint32_t getFreeHeap();
uint8_t getChipRevision();
uint8_t getCpuFreqMHz(){ return CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ; }
uint32_t getCycleCount();
const char * getSdkVersion();
Expand Down