A fork of mAVRISP by Aaron Berk. This version does not use a local file system to hold the AVR program. Instead it uses a serial connection to a PC and a python script to send the AVR program to the mbed.
Fork of mAVRISP by
Diff: AVR910_Serial.cpp
- Revision:
- 4:ceee1eb7062e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/AVR910_Serial.cpp Sat Jan 31 22:44:09 2015 +0000 @@ -0,0 +1,336 @@ +/** + * @author Aaron Berk, Jeroen Voogd + * + * @section LICENSE + * + * Copyright (c) 2010 Aaron Berk + * Copyright (c) 2015 Jeroen Voogd + * + * 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. + * + * @section DESCRIPTION + * + * Program AVR chips with the AVR910 ISP (in-system programming) protocol, + * using an mbed. The version of Aaron Berk used a local file system, this version + * useses a python script to feed the data via a serial connection. + * + * AVR910 Application Note: + * + * http://www.atmel.com/dyn/resources/prod_documents/doc0943.pdf + */ + +/** + * Includes + */ +#include "AVR910_Serial.h" + +Serial debug(USBTX, USBRX); + +AVR910::AVR910(PinName mosi, + PinName miso, + PinName sclk, + PinName nReset) : spi_(mosi, miso, sclk), nReset_(nReset) +{ + + //Slow frequency as default to ensure no errors from + //trying to run it too fast. Increase as appropriate. + spi_.frequency(32000); + spi_.format(8, 0); + + int response = 0; + + //Enter serial programming mode by pulling reset line low. + nReset_ = 0; + + //Wait 20ms before issuing first command. + wait_ms(20); + + //Issue a programming enable command. + response = enableProgramming(); + + //TODO: introduce a timeout. + while (response < 0) { + + //Give nReset a positive pulse. + nReset_ = 1; + wait_ms(20); + nReset_ = 0; + wait_ms(20); + + //Issue another programming enable. + response = enableProgramming(); + } +} + + +int AVR910::programData(char* myData, int dataSize, int pageSize, int numPages) +{ + + //Clear memory contents. + chipErase(); + + char pageOffset = 0; + int pageNumber = 0; + int c = 0; + int highLow = 0; + + //In this version we're always dealing with paged memory. + + for (int i=0; i<dataSize; i++) { + c = myData[i]; + //Page is fully loaded, time to write it to flash. + if (pageOffset == (pageSize)) { + writeFlashMemoryPage(pageNumber); + + pageNumber++; + if (pageNumber > numPages) { + break; + } + pageOffset = 0; + } + + //Write low byte. + if (highLow == 0) { + loadMemoryPage(WRITE_LOW_BYTE, pageOffset, c); + highLow = 1; + } + //Write high byte. + else { + loadMemoryPage(WRITE_HIGH_BYTE, pageOffset, c); + highLow = 0; + pageOffset++; + } + + } + + //We might have partially filled up a page. + writeFlashMemoryPage(pageNumber); + + int success = -1; + success = checkMemoryData(pageNumber, myData, dataSize); + + //Leave serial programming mode by pulling reset line high. + nReset_ = 1; + + return success; + +} +void AVR910::setFrequency(int frequency) +{ + + spi_.frequency(frequency); + +} + +int AVR910::enableProgramming(void) +{ + + int response = 0; + int error = 0; + + //Programming Enable Command: 0xAC, 0x53, 0x00, 0x00 + //Byte two echo'd back in byte three. + spi_.write(0xAC); + + spi_.write(0x53); + + response = spi_.write(0x00); + + if (response == 0x53) { + error = 0; + } else { + error = -1; + } + + response = spi_.write(0x00); + + return error; + +} + +void AVR910::poll(void) +{ + + int response = 0; + + do { + spi_.write(0xF0); + spi_.write(0x00); + spi_.write(0x00); + response = spi_.write(0x00); + } while ((response & 0x01) != 0); + +} + +int AVR910::readVendorCode(void) +{ + + int response = 0; + + //Issue read signature byte command. + //Address 0x00 is vendor code. + spi_.write(0x30); + spi_.write(0x00); + spi_.write(0x00); + response = spi_.write(0x00); + + return response; + +} + +int AVR910::readPartFamilyAndFlashSize(void) +{ + + int response = 0; + + //Issue read signature byte command. + //Address 0x01 is part family and flash size code. + spi_.write(0x30); + spi_.write(0x00); + spi_.write(0x01); + response = spi_.write(0x00); + + return response; + +} + +int AVR910::readPartNumber(void) +{ + + int response = 0; + + //Issue read signature byte command. + //Address 0x02 is part number code. + spi_.write(0x30); + spi_.write(0x00); + spi_.write(0x02); + response = spi_.write(0x00); + + return response; + +} + +void AVR910::chipErase(void) +{ + + //Issue chip erase command. + spi_.write(0xAC); + spi_.write(0x80); + spi_.write(0x00); + spi_.write(0x00); + + poll(); + + //Temporarily release reset line. + nReset_ = 1; + nReset_ = 0; + +} + +void AVR910::loadMemoryPage(int highLow, char address, char data) +{ + + spi_.write(highLow); + spi_.write(0x00); + spi_.write(address & 0x3F); + spi_.write(data); + + poll(); + +} + +void AVR910::writeFlashMemoryByte(int highLow, int address, char data) +{ + + spi_.write(highLow); + spi_.write(address & 0xFF00 >> 8); + spi_.write(address & 0x00FF); + spi_.write(data); + +} + +void AVR910::writeFlashMemoryPage(char pageNumber) +{ + + spi_.write(0x4C); + spi_.write((pageNumber >> 2) & 0x3F); + spi_.write((pageNumber & 0x03) << 6); + spi_.write(0x00); + + poll(); + +} + +char AVR910::readProgramMemory(int highLow, char pageNumber, char pageOffset) +{ + + int response = 0; + + spi_.write(highLow); + spi_.write((pageNumber >> 2) & 0x3F); + spi_.write(((pageNumber & 0x03) << 6) | (pageOffset & 0x3F)); + response = spi_.write(0x00); + + poll(); + + return response; + +} + + +int AVR910::checkMemoryData(int numPages, char* myData, int dataSize) +{ + + int success = 0; + int response = 0; + char c = 0; + + // start at the beginning of the original data + int dpoint=0; + + for (int i = 0; i <= numPages; i++) { + for (int j = 0; j < PAGE_SIZE; j++) { + + c = myData[dpoint]; + //Read program memory low byte. + response = readProgramMemory(READ_LOW_BYTE, i, j); + if ( c != response ) { + success = -1; + } + + // next data item to check, break if all data has been checked + dpoint++; + if (dpoint==dataSize) break; + c = myData[dpoint]; + + //Read program memory high byte. + response = readProgramMemory(READ_HIGH_BYTE, i, j); + if ( c != response ) { + success = -1; + } + + // next data item to check, break if all data has been checked + dpoint++; + if (dpoint==dataSize) break; + } + } + + return success; + +}