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esp8266/libraries/ESP8266AVRISP/src/ESP8266AVRISP.cpp
Earle F. Philhower, III 6bd4b1c4f7
Clean up trivial gcc -wextra warnings (#6254) 
After verifying that they really were spurious, clean up the warnings
that gcc -wextra reports, except for LeaMDNS.

Upgrade GCC to gcc-7 for host builds
2019-07-05 22:31:50 -07:00

530 lines
13 KiB
C++
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/*
AVR In-System Programming over WiFi for ESP8266
Copyright (c) Kiril Zyapkov <kiril@robotev.com>
Original version:
ArduinoISP version 04m3
Copyright (c) 2008-2011 Randall Bohn
If you require a license, see
http://www.opensource.org/licenses/bsd-license.php
*/
#include <Arduino.h>
#include <SPI.h>
#include <pgmspace.h>
#include <ESP8266WiFi.h>
#include "ESP8266AVRISP.h"
#include "command.h"
extern "C" {
#include "user_interface.h"
#include "mem.h"
}
#ifdef malloc
#undef malloc
#endif
#define malloc os_malloc
#ifdef free
#undef free
#endif
#define free os_free
// #define AVRISP_DEBUG(fmt, ...) os_printf("[AVRP] " fmt "\r\n", ##__VA_ARGS__ )
#define AVRISP_DEBUG(...)
#define AVRISP_HWVER 2
#define AVRISP_SWMAJ 1
#define AVRISP_SWMIN 18
#define AVRISP_PTIME 10
#define EECHUNK (32)
#define beget16(addr) (*addr * 256 + *(addr+1))
ESP8266AVRISP::ESP8266AVRISP(uint16_t port, uint8_t reset_pin, uint32_t spi_freq, bool reset_state, bool reset_activehigh):
_spi_freq(spi_freq), _server(WiFiServer(port)), _state(AVRISP_STATE_IDLE),
_reset_pin(reset_pin), _reset_state(reset_state), _reset_activehigh(reset_activehigh)
{
pinMode(_reset_pin, OUTPUT);
setReset(_reset_state);
}
void ESP8266AVRISP::begin() {
_server.begin();
}
void ESP8266AVRISP::setSpiFrequency(uint32_t freq) {
_spi_freq = freq;
if (_state == AVRISP_STATE_ACTIVE) {
SPI.setFrequency(freq);
}
}
void ESP8266AVRISP::setReset(bool rst) {
_reset_state = rst;
digitalWrite(_reset_pin, _resetLevel(_reset_state));
}
AVRISPState_t ESP8266AVRISP::update() {
switch (_state) {
case AVRISP_STATE_IDLE: {
if (_server.hasClient()) {
_client = _server.available();
_client.setNoDelay(true);
AVRISP_DEBUG("client connect %s:%d", _client.remoteIP().toString().c_str(), _client.remotePort());
_client.setTimeout(100); // for getch()
_state = AVRISP_STATE_PENDING;
_reject_incoming();
}
break;
}
case AVRISP_STATE_PENDING:
case AVRISP_STATE_ACTIVE: {
// handle disconnect
if (!_client.connected()) {
_client.stop();
AVRISP_DEBUG("client disconnect");
if (pmode) {
SPI.end();
pmode = 0;
}
setReset(_reset_state);
_state = AVRISP_STATE_IDLE;
} else {
_reject_incoming();
}
break;
}
}
return _state;
}
AVRISPState_t ESP8266AVRISP::serve() {
switch (update()) {
case AVRISP_STATE_IDLE:
// should not be called when idle, error?
break;
case AVRISP_STATE_PENDING:
_state = AVRISP_STATE_ACTIVE;
// falls through
case AVRISP_STATE_ACTIVE: {
while (_client.available()) {
avrisp();
}
return update();
}
}
return _state;
}
inline void ESP8266AVRISP::_reject_incoming(void) {
while (_server.hasClient()) _server.available().stop();
}
uint8_t ESP8266AVRISP::getch() {
while (!_client.available()) yield();
uint8_t b = (uint8_t)_client.read();
// AVRISP_DEBUG("< %02x", b);
return b;
}
void ESP8266AVRISP::fill(int n) {
// AVRISP_DEBUG("fill(%u)", n);
for (int x = 0; x < n; x++) {
buff[x] = getch();
}
}
uint8_t ESP8266AVRISP::spi_transaction(uint8_t a, uint8_t b, uint8_t c, uint8_t d) {
SPI.transfer(a);
SPI.transfer(b);
SPI.transfer(c);
return SPI.transfer(d);
}
void ESP8266AVRISP::empty_reply() {
if (Sync_CRC_EOP == getch()) {
_client.print((char)Resp_STK_INSYNC);
_client.print((char)Resp_STK_OK);
} else {
error++;
_client.print((char)Resp_STK_NOSYNC);
}
}
void ESP8266AVRISP::breply(uint8_t b) {
if (Sync_CRC_EOP == getch()) {
uint8_t resp[3];
resp[0] = Resp_STK_INSYNC;
resp[1] = b;
resp[2] = Resp_STK_OK;
_client.write((const uint8_t *)resp, (size_t)3);
} else {
error++;
_client.print((char)Resp_STK_NOSYNC);
}
}
void ESP8266AVRISP::get_parameter(uint8_t c) {
switch (c) {
case 0x80:
breply(AVRISP_HWVER);
break;
case 0x81:
breply(AVRISP_SWMAJ);
break;
case 0x82:
breply(AVRISP_SWMIN);
break;
case 0x93:
breply('S'); // serial programmer
break;
default:
breply(0);
}
}
void ESP8266AVRISP::set_parameters() {
// call this after reading paramter packet into buff[]
param.devicecode = buff[0];
param.revision = buff[1];
param.progtype = buff[2];
param.parmode = buff[3];
param.polling = buff[4];
param.selftimed = buff[5];
param.lockbytes = buff[6];
param.fusebytes = buff[7];
param.flashpoll = buff[8];
// ignore buff[9] (= buff[8])
// following are 16 bits (big endian)
param.eeprompoll = beget16(&buff[10]);
param.pagesize = beget16(&buff[12]);
param.eepromsize = beget16(&buff[14]);
// 32 bits flashsize (big endian)
param.flashsize = buff[16] * 0x01000000
+ buff[17] * 0x00010000
+ buff[18] * 0x00000100
+ buff[19];
}
void ESP8266AVRISP::start_pmode() {
SPI.begin();
SPI.setFrequency(_spi_freq);
SPI.setHwCs(false);
// try to sync the bus
SPI.transfer(0x00);
digitalWrite(_reset_pin, _resetLevel(false));
delayMicroseconds(50);
digitalWrite(_reset_pin, _resetLevel(true));
delay(30);
spi_transaction(0xAC, 0x53, 0x00, 0x00);
pmode = 1;
}
void ESP8266AVRISP::end_pmode() {
SPI.end();
setReset(_reset_state);
pmode = 0;
}
void ESP8266AVRISP::universal() {
uint8_t ch;
fill(4);
ch = spi_transaction(buff[0], buff[1], buff[2], buff[3]);
breply(ch);
}
void ESP8266AVRISP::flash(uint8_t hilo, int addr, uint8_t data) {
spi_transaction(0x40 + 8 * hilo,
addr >> 8 & 0xFF,
addr & 0xFF,
data);
}
void ESP8266AVRISP::commit(int addr) {
spi_transaction(0x4C, (addr >> 8) & 0xFF, addr & 0xFF, 0);
delay(AVRISP_PTIME);
}
//#define _addr_page(x) (here & 0xFFFFE0)
int ESP8266AVRISP::addr_page(int addr) {
if (param.pagesize == 32) return addr & 0xFFFFFFF0;
if (param.pagesize == 64) return addr & 0xFFFFFFE0;
if (param.pagesize == 128) return addr & 0xFFFFFFC0;
if (param.pagesize == 256) return addr & 0xFFFFFF80;
AVRISP_DEBUG("unknown page size: %d", param.pagesize);
return addr;
}
void ESP8266AVRISP::write_flash(int length) {
fill(length);
if (Sync_CRC_EOP == getch()) {
_client.print((char) Resp_STK_INSYNC);
_client.print((char) write_flash_pages(length));
} else {
error++;
_client.print((char) Resp_STK_NOSYNC);
}
}
uint8_t ESP8266AVRISP::write_flash_pages(int length) {
int x = 0;
int page = addr_page(here);
while (x < length) {
yield();
if (page != addr_page(here)) {
commit(page);
page = addr_page(here);
}
flash(LOW, here, buff[x++]);
flash(HIGH, here, buff[x++]);
here++;
}
commit(page);
return Resp_STK_OK;
}
uint8_t ESP8266AVRISP::write_eeprom(int length) {
// here is a word address, get the byte address
int start = here * 2;
int remaining = length;
if (length > param.eepromsize) {
error++;
return Resp_STK_FAILED;
}
while (remaining > EECHUNK) {
write_eeprom_chunk(start, EECHUNK);
start += EECHUNK;
remaining -= EECHUNK;
}
write_eeprom_chunk(start, remaining);
return Resp_STK_OK;
}
// write (length) bytes, (start) is a byte address
uint8_t ESP8266AVRISP::write_eeprom_chunk(int start, int length) {
// this writes byte-by-byte,
// page writing may be faster (4 bytes at a time)
fill(length);
// prog_lamp(LOW);
for (int x = 0; x < length; x++) {
int addr = start + x;
spi_transaction(0xC0, (addr >> 8) & 0xFF, addr & 0xFF, buff[x]);
delay(45);
}
// prog_lamp(HIGH);
return Resp_STK_OK;
}
void ESP8266AVRISP::program_page() {
char result = (char) Resp_STK_FAILED;
int length = 256 * getch();
length += getch();
char memtype = getch();
// flash memory @here, (length) bytes
if (memtype == 'F') {
write_flash(length);
return;
}
if (memtype == 'E') {
result = (char)write_eeprom(length);
if (Sync_CRC_EOP == getch()) {
_client.print((char) Resp_STK_INSYNC);
_client.print(result);
} else {
error++;
_client.print((char) Resp_STK_NOSYNC);
}
return;
}
_client.print((char)Resp_STK_FAILED);
return;
}
uint8_t ESP8266AVRISP::flash_read(uint8_t hilo, int addr) {
return spi_transaction(0x20 + hilo * 8,
(addr >> 8) & 0xFF,
addr & 0xFF,
0);
}
void ESP8266AVRISP::flash_read_page(int length) {
uint8_t *data = (uint8_t *) malloc(length + 1);
for (int x = 0; x < length; x += 2) {
*(data + x) = flash_read(LOW, here);
*(data + x + 1) = flash_read(HIGH, here);
here++;
}
*(data + length) = Resp_STK_OK;
_client.write((const uint8_t *)data, (size_t)(length + 1));
free(data);
return;
}
void ESP8266AVRISP::eeprom_read_page(int length) {
// here again we have a word address
uint8_t *data = (uint8_t *) malloc(length + 1);
int start = here * 2;
for (int x = 0; x < length; x++) {
int addr = start + x;
uint8_t ee = spi_transaction(0xA0, (addr >> 8) & 0xFF, addr & 0xFF, 0xFF);
*(data + x) = ee;
}
*(data + length) = Resp_STK_OK;
_client.write((const uint8_t *)data, (size_t)(length + 1));
free(data);
return;
}
void ESP8266AVRISP::read_page() {
int length = 256 * getch();
length += getch();
char memtype = getch();
if (Sync_CRC_EOP != getch()) {
error++;
_client.print((char) Resp_STK_NOSYNC);
return;
}
_client.print((char) Resp_STK_INSYNC);
if (memtype == 'F') flash_read_page(length);
if (memtype == 'E') eeprom_read_page(length);
return;
}
void ESP8266AVRISP::read_signature() {
if (Sync_CRC_EOP != getch()) {
error++;
_client.print((char) Resp_STK_NOSYNC);
return;
}
_client.print((char) Resp_STK_INSYNC);
uint8_t high = spi_transaction(0x30, 0x00, 0x00, 0x00);
_client.print((char) high);
uint8_t middle = spi_transaction(0x30, 0x00, 0x01, 0x00);
_client.print((char) middle);
uint8_t low = spi_transaction(0x30, 0x00, 0x02, 0x00);
_client.print((char) low);
_client.print((char) Resp_STK_OK);
}
// It seems ArduinoISP is based on the original STK500 (not v2)
// but implements only a subset of the commands.
void ESP8266AVRISP::avrisp() {
uint8_t data, low, high;
uint8_t ch = getch();
// Avoid set but not used warning. Leaving them in as it helps document the code
(void) data;
(void) low;
(void) high;
// AVRISP_DEBUG("CMD 0x%02x", ch);
switch (ch) {
case Cmnd_STK_GET_SYNC:
error = 0;
empty_reply();
break;
case Cmnd_STK_GET_SIGN_ON:
if (getch() == Sync_CRC_EOP) {
_client.print((char) Resp_STK_INSYNC);
_client.print(F("AVR ISP")); // AVR061 says "AVR STK"?
_client.print((char) Resp_STK_OK);
}
break;
case Cmnd_STK_GET_PARAMETER:
get_parameter(getch());
break;
case Cmnd_STK_SET_DEVICE:
fill(20);
set_parameters();
empty_reply();
break;
case Cmnd_STK_SET_DEVICE_EXT: // ignored
fill(5);
empty_reply();
break;
case Cmnd_STK_ENTER_PROGMODE:
start_pmode();
empty_reply();
break;
case Cmnd_STK_LOAD_ADDRESS:
here = getch();
here += 256 * getch();
// AVRISP_DEBUG("here=0x%04x", here);
empty_reply();
break;
// XXX: not implemented!
case Cmnd_STK_PROG_FLASH:
low = getch();
high = getch();
empty_reply();
break;
// XXX: not implemented!
case Cmnd_STK_PROG_DATA:
data = getch();
empty_reply();
break;
case Cmnd_STK_PROG_PAGE:
program_page();
break;
case Cmnd_STK_READ_PAGE:
read_page();
break;
case Cmnd_STK_UNIVERSAL:
universal();
break;
case Cmnd_STK_LEAVE_PROGMODE:
error = 0;
end_pmode();
empty_reply();
delay(5);
// if (_client && _client.connected())
_client.stop();
// AVRISP_DEBUG("left progmode");
break;
case Cmnd_STK_READ_SIGN:
read_signature();
break;
// expecting a command, not Sync_CRC_EOP
// this is how we can get back in sync
case Sync_CRC_EOP: // 0x20, space
error++;
_client.print((char) Resp_STK_NOSYNC);
break;
// anything else we will return STK_UNKNOWN
default:
AVRISP_DEBUG("?!?");
error++;
if (Sync_CRC_EOP == getch()) {
_client.print((char)Resp_STK_UNKNOWN);
} else {
_client.print((char)Resp_STK_NOSYNC);
}
}
}
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