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Merge 9a3d35c274 into ba296db701

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Jonathan Bennett 2025-06-06 10:45:07 -05:00 committed by GitHub
commit 55aafb9b54
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6
src/platform/portduino/USBHal.h
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@ -8,6 +8,9 @@
#include <iostream>
#include <libpinedio-usb.h>
#include <unistd.h>
extern "C" {
#include "platform/portduino/ch341a_i2c.h"
}
// include the library for Raspberry GPIO pins
@ -47,6 +50,9 @@ class Ch341Hal : public RadioLibHal
std::string s = "Could not open SPI: ";
throw(s + std::to_string(ret));
}
// How to read the eeprom
// uint8_t buffer[1024] = {0};
// ch341readEEPROM_param(buffer, 0, 128, 128, 8, 1, 0x50, pinedio.handle);
pinedio_set_option(&pinedio, PINEDIO_OPTION_AUTO_CS, 0);
pinedio_set_pin_mode(&pinedio, 3, true);

204
src/platform/portduino/ch341a_i2c.c Normal file
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@ -0,0 +1,204 @@
//
// ch341eeprom programmer version 0.1 (Beta)
//
// Programming tool for the 24Cxx serial EEPROMs using the Winchiphead CH341A IC
//
// (c) December 2011 asbokid <ballymunboy@gmail.com>
// (c) August 2023 Mikhail Medvedev <e-ink-reader@yandex.ru>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "ch341a_i2c.h"
// extern struct libusb_device_handle *handle;
unsigned char *readbuf;
uint32_t getnextpkt; // set by the callback function
uint32_t syncackpkt; // synch / ack flag used by BULK OUT cb function
uint32_t byteoffset;
// callback functions for async USB transfers
static void cbBulkIn(struct libusb_transfer *transfer);
static void cbBulkOut(struct libusb_transfer *transfer);
void ch341ReadCmdMarshall(uint8_t *buffer, uint32_t addr, struct EEPROM *eeprom_info, uint32_t i2c_address)
{
uint8_t *ptr = buffer;
uint8_t msb_addr;
uint32_t size_kb;
*ptr++ = CH341_CMD_I2C_STREAM; // 0
*ptr++ = CH341_CMD_I2C_STM_STA; // 1
// Write address
*ptr++ = CH341_CMD_I2C_STM_OUT | ((*eeprom_info).addr_size + 1); // 2: I2C bus adddress + EEPROM address
if ((*eeprom_info).addr_size >= 2) {
// 24C32 and more
msb_addr = addr >> 16 & (*eeprom_info).i2c_addr_mask;
*ptr++ = (i2c_address | msb_addr) << 1; // 3
*ptr++ = (addr >> 8 & 0xFF); // 4
*ptr++ = (addr >> 0 & 0xFF); // 5
} else {
// 24C16 and less
msb_addr = addr >> 8 & (*eeprom_info).i2c_addr_mask;
*ptr++ = (i2c_address | msb_addr) << 1; // 3
*ptr++ = (addr >> 0 & 0xFF); // 4
}
// Read
*ptr++ = CH341_CMD_I2C_STM_STA; // 6/5
*ptr++ = CH341_CMD_I2C_STM_OUT | 1; // 7/6
*ptr++ = ((i2c_address | msb_addr) << 1) | 1; // 8/7: Read command
// Configuration?
*ptr++ = 0xE0; // 9/8
*ptr++ = 0x00; // 10/9
if ((*eeprom_info).addr_size < 2)
*ptr++ = 0x10; // x/10
memcpy(ptr, "\x00\x06\x04\x00\x00\x00\x00\x00\x00", 9);
ptr += 9; // 10
size_kb = (*eeprom_info).size / 1024;
*ptr++ = size_kb & 0xFF; // 19
*ptr++ = (size_kb >> 8) & 0xFF; // 20
memcpy(ptr, "\x00\x00\x11\x4d\x40\x77\xcd\xab\xba\xdc", 10);
ptr += 10;
// Frame 2
*ptr++ = CH341_CMD_I2C_STREAM;
memcpy(ptr,
"\xe0\x00\x00\xc4\xf1\x12\x00\x11\x4d\x40\x77\xf0\xf1\x12\x00"
"\xd9\x8b\x41\x7e\x00\xe0\xfd\x7f\xf0\xf1\x12\x00\x5a\x88\x41\x7e",
31);
ptr += 31;
// Frame 3
*ptr++ = CH341_CMD_I2C_STREAM;
memcpy(ptr,
"\xe0\x00\x00\x2a\x88\x41\x7e\x06\x04\x00\x00\x11\x4d\x40\x77"
"\xe8\xf3\x12\x00\x14\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00",
31);
ptr += 31;
// Finalize
*ptr++ = CH341_CMD_I2C_STREAM; // 0xAA
*ptr++ = 0xDF; // ???
*ptr++ = CH341_CMD_I2C_STM_IN; // 0xC0
*ptr++ = CH341_CMD_I2C_STM_STO; // 0x75
*ptr++ = CH341_CMD_I2C_STM_END; // 0x00
assert(ptr - buffer == CH341_EEPROM_READ_CMD_SZ);
}
// --------------------------------------------------------------------------
// ch341readEEPROM()
// read n bytes from device (in packets of 32 bytes)
int32_t ch341readEEPROM_param(uint8_t *buffer, uint32_t offset, uint32_t bytestoread, uint32_t ic_size, uint32_t block_size,
uint8_t algorithm, uint32_t i2c_address, struct libusb_device_handle *handle)
{
uint8_t ch341outBuffer[EEPROM_READ_BULKOUT_BUF_SZ];
uint8_t ch341inBuffer[IN_BUF_SZ]; // 0x100 bytes
int32_t ret = 0, readpktcount = 0;
struct libusb_transfer *xferBulkIn, *xferBulkOut;
struct timeval tv = {0, 100}; // our async polling interval
struct EEPROM eeprom_info;
eeprom_info.name = "24c01";
eeprom_info.size = ic_size;
eeprom_info.page_size = (uint16_t)block_size;
eeprom_info.addr_size = 0x0f & algorithm;
eeprom_info.i2c_addr_mask = (0xf0 & algorithm) / 16;
xferBulkIn = libusb_alloc_transfer(0);
xferBulkOut = libusb_alloc_transfer(0);
if (!xferBulkIn || !xferBulkOut) {
printf("Couldn't allocate USB transfer structures\n");
return -1;
}
byteoffset = 0;
memset(ch341inBuffer, 0, EEPROM_READ_BULKIN_BUF_SZ);
ch341ReadCmdMarshall(ch341outBuffer, offset, &eeprom_info, i2c_address); // Fill output buffer
libusb_fill_bulk_transfer(xferBulkIn, handle, BULK_READ_ENDPOINT, ch341inBuffer, EEPROM_READ_BULKIN_BUF_SZ, cbBulkIn, NULL,
DEFAULT_TIMEOUT);
libusb_fill_bulk_transfer(xferBulkOut, handle, BULK_WRITE_ENDPOINT, ch341outBuffer, EEPROM_READ_BULKOUT_BUF_SZ, cbBulkOut,
NULL, DEFAULT_TIMEOUT);
libusb_submit_transfer(xferBulkIn);
libusb_submit_transfer(xferBulkOut);
readbuf = buffer;
while (1) {
ret = libusb_handle_events_timeout(NULL, &tv);
if (ret < 0 || getnextpkt == -1) { // indicates an error
printf("ret from libusb_handle_timeout = %d\n", ret);
printf("getnextpkt = %u\n", getnextpkt);
if (ret < 0)
printf("USB read error : %s\n", strerror(-ret));
libusb_free_transfer(xferBulkIn);
libusb_free_transfer(xferBulkOut);
return -1;
}
if (getnextpkt == 1) { // callback function reports a new BULK IN packet received
getnextpkt = 0; // reset the flag
readpktcount++; // increment the read packet counter
byteoffset += EEPROM_READ_BULKIN_BUF_SZ;
if (byteoffset == bytestoread)
break;
libusb_submit_transfer(xferBulkIn); // re-submit request for next BULK IN packet of EEPROM data
if (syncackpkt)
syncackpkt = 0;
// if 4th packet received, we are at end of 0x80 byte data block,
// if it is not the last block, then resubmit request for data
if (readpktcount == 4) {
readpktcount = 0;
ch341ReadCmdMarshall(ch341outBuffer, byteoffset, &eeprom_info, i2c_address); // Fill output buffer
libusb_fill_bulk_transfer(xferBulkOut, handle, BULK_WRITE_ENDPOINT, ch341outBuffer, EEPROM_READ_BULKOUT_BUF_SZ,
cbBulkOut, NULL, DEFAULT_TIMEOUT);
libusb_submit_transfer(xferBulkOut); // update transfer struct (with new EEPROM page offset)
// and re-submit next transfer request to BULK OUT endpoint
}
}
}
libusb_free_transfer(xferBulkIn);
libusb_free_transfer(xferBulkOut);
return 0;
}
// Callback function for async bulk in comms
void cbBulkIn(struct libusb_transfer *transfer)
{
switch (transfer->status) {
case LIBUSB_TRANSFER_COMPLETED:
// copy read data to our EEPROM buffer
memcpy(readbuf + byteoffset, transfer->buffer, transfer->actual_length);
getnextpkt = 1;
break;
default:
printf("\ncbBulkIn: error : %d\n", transfer->status);
getnextpkt = -1;
}
return;
}
// Callback function for async bulk out comms
void cbBulkOut(struct libusb_transfer *transfer)
{
syncackpkt = 1;
return;
}

43
src/platform/portduino/ch341a_i2c.h Normal file
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@ -0,0 +1,43 @@
// libUSB driver for the ch341a in i2c mode
//
// Copyright 2011 asbokid <ballymunboy@gmail.com>
#ifndef __CH341A_I2C_H__
#define __CH341A_I2C_H__
#include <assert.h>
#include <errno.h>
#include <libusb-1.0/libusb.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define BULK_WRITE_ENDPOINT 0x02 /* bEndpointAddress 0x02 EP 2 OUT (Bulk)*/
#define BULK_READ_ENDPOINT 0x82 /* bEndpointAddress 0x82 EP 2 IN (Bulk)*/
#define DEFAULT_TIMEOUT 300 // 300mS for USB timeouts
#define IN_BUF_SZ 0x100
#define EEPROM_READ_BULKIN_BUF_SZ 0x20
#define EEPROM_READ_BULKOUT_BUF_SZ 0x65
#define CH341_CMD_I2C_STREAM 0xAA
#define CH341_CMD_I2C_STM_STA 0x74
#define CH341_CMD_I2C_STM_STO 0x75
#define CH341_CMD_I2C_STM_OUT 0x80
#define CH341_CMD_I2C_STM_IN 0xC0
#define CH341_CMD_I2C_STM_END 0x00
#define CH341_EEPROM_READ_CMD_SZ 0x65 /* Same size for all 24cXX read setup and next packets*/
struct EEPROM {
char *name;
uint32_t size;
uint16_t page_size;
uint8_t addr_size; // Length of address in bytes
uint8_t i2c_addr_mask;
};
int32_t ch341readEEPROM_param(uint8_t *buffer, uint32_t offset, uint32_t bytestoread, uint32_t ic_size, uint32_t block_size,
uint8_t algorithm, uint32_t i2c_address, struct libusb_device_handle *handle);
#endif /* __CH341A_I2C_H__ */