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Fix for https://github.com/arendst/Tasmota/discussions/15703#discussioncomment-5713294 (#18534) 

Added and fixed comments

Co-authored-by: JeroenSt <nospam@nospam.org>
This commit is contained in:
Jeroen 2023-04-29 14:46:38 +02:00 committed by GitHub
parent 1d0c19311d
commit c5612a50fb
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 36 additions and 34 deletions
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3
lib/lib_basic/TasmotaModbus-3.6.0/src/TasmotaModbus.cpp
View File

@ -200,7 +200,8 @@ uint8_t TasmotaModbus::ReceiveBuffer(uint8_t *buffer, uint8_t register_count, ui
} else {
buffer[mb_len++] = data;
if (3 == mb_len) {
if ((buffer[1] == 5) || (buffer[1] == 6) || (buffer[1] == 15) || (buffer[1] == 16)) header_length = 4; // Addr, Func, StartAddr
// If functioncode is 5,6,15 or 16 the header length is 4 instead of 3
if ((buffer[1] == 5) || (buffer[1] == 6) || (buffer[1] == 15) || (buffer[1] == 16)) header_length = 4;
}
}

67
tasmota/tasmota_xdrv_driver/xdrv_63_modbus_bridge.ino
View File

@ -163,13 +163,13 @@ struct ModbusBridge
ModbusBridgeFunctionCode functionCode = ModbusBridgeFunctionCode::mb_undefined;
ModbusBridgeType type = ModbusBridgeType::mb_undefined;
uint16_t dataCount = 0;
uint16_t byteCount = 0;
uint16_t startAddress = 0;
uint8_t deviceAddress = 0;
uint8_t count = 0;
uint16_t dataCount = 0; // Number of bits or registers to read/write
uint16_t byteCount = 0; // Number of bytes to read/write
uint16_t startAddress = 0; // First address to read/write
uint8_t deviceAddress = 0; // Modbus address of device to read
uint8_t count = 0; // Number of values to read / write
bool raw = false;
uint8_t *buffer = nullptr;
uint8_t *buffer = nullptr; // Buffer for storing read / write data
};
ModbusBridge modbusBridge;
@ -240,7 +240,7 @@ void ModbusBridgeSetBaudrate(uint32_t baudrate)
/********************************************************************************************/
//
// Handles data received from tasmota modbus wrapper and send this to (TCP or) MQTT client
// Handles data received from tasmota modbus wrapper and send this to (TCP and/or) MQTT client
//
void ModbusBridgeHandle(void)
{
@ -248,7 +248,7 @@ void ModbusBridgeHandle(void)
if (data_ready)
{
if (modbusBridge.byteCount == 0) modbusBridge.byteCount = modbusBridge.dataCount * 2;
if (nullptr == modbusBridge.buffer)
if (nullptr == modbusBridge.buffer) // If buffer is not initialized do not process received data
{
ModbusBridgeAllocError(PSTR("read"));
modbusBridge.dataCount = 0;
@ -256,7 +256,7 @@ void ModbusBridgeHandle(void)
return;
}
memset(modbusBridge.buffer, 0, MBR_RECEIVE_BUFFER_SIZE);
uint32_t error = modbusBridgeModbus->ReceiveBuffer(modbusBridge.buffer, 0, modbusBridge.byteCount);
uint32_t error = modbusBridgeModbus->ReceiveBuffer(modbusBridge.buffer, 0, MBR_RECEIVE_BUFFER_SIZE - 9);
#ifdef USE_MODBUS_BRIDGE_TCP
for (uint32_t i = 0; i < nitems(modbusBridgeTCP.client_tcp); i++)
@ -281,25 +281,16 @@ void ModbusBridgeHandle(void)
nrOfBytes += 1;
client.write(header, 9);
}
else if (modbusBridge.buffer[1] <= 2)
{
header[4] = modbusBridge.byteCount >> 8;
header[5] = modbusBridge.byteCount + 3;
header[8] = modbusBridge.byteCount;
client.write(header, 9);
nrOfBytes += 1;
client.write(modbusBridge.buffer + 3, modbusBridge.byteCount); // Don't send CRC
nrOfBytes += modbusBridge.byteCount;
}
else if (modbusBridge.buffer[1] <= 4)
{
header[4] = modbusBridge.byteCount >> 8;
header[5] = modbusBridge.byteCount + 3;
header[8] = modbusBridge.byteCount;
uint8_t received_data_bytes = modbusBridgeModbus->ReceiveCount() - 5;
header[4] = received_data_bytes >> 8;
header[5] = received_data_bytes + 3;
header[8] = received_data_bytes;
client.write(header, 9);
nrOfBytes += 1;
client.write(modbusBridge.buffer + 3, modbusBridge.byteCount); // Don't send CRC
nrOfBytes += modbusBridge.byteCount;
client.write(modbusBridge.buffer + 3, received_data_bytes); // Don't send CRC
nrOfBytes += received_data_bytes;
}
else
{
@ -343,20 +334,24 @@ void ModbusBridgeHandle(void)
errorcode = ModbusBridgeError::wrongfunctioncode;
else if ((uint8_t)modbusBridge.functionCode < 5)
{
// Do not check buffer[2] but received bytes for correct length but use the nr of received bytes
uint8_t received_data_bytes = modbusBridgeModbus->ReceiveCount() - 5;
if ((uint8_t)modbusBridge.functionCode < 3)
{
if ((uint8_t)(((modbusBridge.dataCount - 1) >> 3) + 1) != (uint8_t)modbusBridge.buffer[2])
// Check if returned number of bits matches the requested number of bits
if ((uint8_t)(((modbusBridge.dataCount - 1) >> 3) + 1) > received_data_bytes)
errorcode = ModbusBridgeError::wrongdataCount;
}
else
{
if ((modbusBridge.type == ModbusBridgeType::mb_int8 || modbusBridge.type == ModbusBridgeType::mb_uint8) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)modbusBridge.buffer[2]))
if ((modbusBridge.type == ModbusBridgeType::mb_int8 || modbusBridge.type == ModbusBridgeType::mb_uint8) && ((uint8_t)modbusBridge.dataCount > received_data_bytes))
errorcode = ModbusBridgeError::wrongdataCount;
else if ((modbusBridge.type == ModbusBridgeType::mb_bit) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)modbusBridge.buffer[2]))
else if ((modbusBridge.type == ModbusBridgeType::mb_bit) && ((uint8_t)modbusBridge.dataCount > received_data_bytes))
errorcode = ModbusBridgeError::wrongdataCount;
else if ((modbusBridge.type == ModbusBridgeType::mb_int16 || modbusBridge.type == ModbusBridgeType::mb_uint16) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)modbusBridge.buffer[2]))
else if ((modbusBridge.type == ModbusBridgeType::mb_int16 || modbusBridge.type == ModbusBridgeType::mb_uint16) && ((uint8_t)modbusBridge.dataCount > received_data_bytes))
errorcode = ModbusBridgeError::wrongdataCount;
else if ((modbusBridge.type == ModbusBridgeType::mb_int32 || modbusBridge.type == ModbusBridgeType::mb_uint32 || modbusBridge.type == ModbusBridgeType::mb_float) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)modbusBridge.buffer[2]))
else if ((modbusBridge.type == ModbusBridgeType::mb_int32 || modbusBridge.type == ModbusBridgeType::mb_uint32 || modbusBridge.type == ModbusBridgeType::mb_float) && ((uint8_t)modbusBridge.dataCount > received_data_bytes))
errorcode = ModbusBridgeError::wrongdataCount;
}
}
@ -364,6 +359,7 @@ void ModbusBridgeHandle(void)
{
if (modbusBridge.type == ModbusBridgeType::mb_raw)
{
// Ouput raw data as decimal bytes
Response_P(PSTR("{\"" D_JSON_MODBUS_RECEIVED "\":{\"RAW\":["));
for (uint8_t i = 0; i < modbusBridgeModbus->ReceiveCount(); i++)
{
@ -377,6 +373,7 @@ void ModbusBridgeHandle(void)
}
else if (modbusBridge.type == ModbusBridgeType::mb_hex)
{
// Output raw data as hexadecimal bytes
Response_P(PSTR("{\"" D_JSON_MODBUS_RECEIVED "\":{\"HEX\":["));
for (uint8_t i = 0; i < modbusBridgeModbus->ReceiveCount(); i++)
{
@ -388,8 +385,9 @@ void ModbusBridgeHandle(void)
ResponseJsonEnd();
MqttPublishPrefixTopicRulesProcess_P(RESULT_OR_TELE, PSTR(D_JSON_MODBUS_RECEIVED));
}
else if ((modbusBridge.buffer[1] > 0) && (modbusBridge.buffer[1] < 7)) // Read Registers
else if ((modbusBridge.buffer[1] > 0) && (modbusBridge.buffer[1] < 7))
{
// Read and process Registers
uint8_t dataOffset = 3;
Response_P(PSTR("{\"" D_JSON_MODBUS_RECEIVED "\":{"));
ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_DEVICE_ADDRESS "\":%d,"), modbusBridge.buffer[0]);
@ -410,6 +408,7 @@ void ModbusBridgeHandle(void)
uint8_t data_count = modbusBridge.count;
if ((uint8_t)modbusBridge.functionCode < 3)
{
// Calculate number of values to return in bitmode
if (modbusBridge.type == ModbusBridgeType::mb_int8 || modbusBridge.type == ModbusBridgeType::mb_uint8)
data_count = (uint8_t)(((modbusBridge.count - 1) >> 3) + 1);
else if (modbusBridge.type == ModbusBridgeType::mb_int16 || modbusBridge.type == ModbusBridgeType::mb_uint16)
@ -426,7 +425,7 @@ void ModbusBridgeHandle(void)
float value = 0;
if (modbusBridge.buffer[1] < 3)
{
// In bit mode only convert returned bytes
// In bit mode only convert returned bits to values
if (modbusBridge.buffer[2] - (count * 4))
((uint8_t *)&value)[0] = modbusBridge.buffer[dataOffset + (count * 4)]; // Get float values
if ((modbusBridge.buffer[2] - (count * 4)) >> 1)
@ -468,6 +467,7 @@ void ModbusBridgeHandle(void)
uint32_t value = 0;
if (modbusBridge.buffer[1] < 3)
{
// In bit mode only convert returned bits to values
if (modbusBridge.buffer[2] - (count * 4))
((uint8_t *)&value)[0] = modbusBridge.buffer[dataOffset + (count * 4)]; // Get uint values
if (modbusBridge.buffer[2] - ((count * 4) - 1))
@ -495,6 +495,7 @@ void ModbusBridgeHandle(void)
uint16_t value = 0;
if (modbusBridge.buffer[1] < 3)
{
// In bit mode only convert returned bits to values
if (modbusBridge.buffer[2] - (count * 2))
((uint8_t *)&value)[0] = modbusBridge.buffer[dataOffset + (count * 2)];
if (modbusBridge.buffer[2] - ((count * 2) - 1))
@ -747,10 +748,10 @@ void CmndModbusBridgeSend(void)
modbusBridge.startAddress = root.getULong(PSTR(D_JSON_MODBUS_START_ADDRESS), 0);
const char *stype = root.getStr(PSTR(D_JSON_MODBUS_TYPE), "uint8");
modbusBridge.count = root.getUInt(PSTR(D_JSON_MODBUS_COUNT), 1); // Number of bits or bytes to read / write
modbusBridge.count = root.getUInt(PSTR(D_JSON_MODBUS_COUNT), 1); // Number of values to read / write
// If functioncode is 1, 2 or 15, the count is not the number of registers but the number
// of bit to read or write, so calculate the number data bytes to read/write.
// of bits to read or write, so calculate the number data bytes to read/write.
if ((functionCode == 1) || (functionCode == 2) || (functionCode == 15)) bitMode = true;
if (modbusBridge.deviceAddress == 0)