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Готовый изменённый modbus

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Артём Запевалов 2023-06-22 08:32:39 +00:00
parent 8d93309a9a
commit e732737492
1 changed files with 153 additions and 284 deletions
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modbus/modbus.c
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@ -1,284 +1,153 @@
#include <stdint.h> #include <stdint.h>
#include <string.h>
unsigned int CRC16_Modbus(unsigned char* buf, int len)
{ unsigned int CRC16_Modbus(unsigned char* buf, int len)
unsigned int crc = 0xFFFF; {
for (int pos = 0; pos < len; pos++) unsigned int crc = 0xFFFF;
{ for (int pos = 0; pos < len; pos++)
crc ^= (unsigned int)buf[pos]; // XOR-байт в наименьший sig. байт crc {
for (int i = 8; i != 0; i--) // Повторите цикл над каждым битом crc ^= (unsigned int)buf[pos]; // XOR-байт в наименьший sig. байт crc
{ for (int i = 8; i != 0; i--) // Повторите цикл над каждым битом
if ((crc & 0x0001) != 0) // Если установлен LSB {
{ if ((crc & 0x0001) != 0) // Если установлен LSB
crc >>= 1; // Сдвиг вправо и XOR 0xA001 {
crc ^= 0xA001; crc >>= 1; // Сдвиг вправо и XOR 0xA001
} crc ^= 0xA001;
else // В противном случае LSB не установлен }
{ else // В противном случае LSB не установлен
crc >>= 1; // Сдвиг вправо {
} crc >>= 1; // Сдвиг вправо
} }
} }
crc = ((crc & 0x00ff) << 8) | ((crc & 0xff00) >> 8); // преобразование младших байтов }
return crc; crc = ((crc & 0x00ff) << 8) | ((crc & 0xff00) >> 8); // преобразование младших байтов
} return crc;
}
size_t read_coil_status(uint8_t address, uint16_t discret_input, unint8_t* buf, size_t buf_len)
{ size_t read_input_status(uint8_t address, uint16_t discret_input, uint16_t quantity_reg, uint8_t* buf, size_t buf_len)
int i = 0; {
buf[i] = address; int i=0;
i++; buf[i] = address;
buf[i] = 0x01; i++;
i++; buf[i] = 0x02;
buf[i] = (discret_input >> 8) & 0xFF; i++;
i++; buf[i] = (discret_input >>8)&0xFF;
buf[i] = discret_input & 0xFF; i++;
i++; buf[i] = discret_input&0xFF;
buf[i] = 0x00; i++;
i++; buf[i] = (quantity_reg >> 8) & 0xFF;
buf[i] = 0x01; i++;
i++; buf[i] = quantity_reg & 0xFF;
crc = CRC16_Modbus(buf, i); i++;
buf[i] = crc & 0xFF; uint16_t crc = CRC16_Modbus(buf, i);
i++; buf[i] = crc & 0xFF;
buf[i] = (crc >> 8) & 0xFF; i++;
i++; buf[i] = (crc >> 8) & 0xFF;
return i; i++;
} return i;
}
size_t read_coil_status_ans(unit8_t address, uint8_t meaning, unint8_t* buf, size_t buf_len)
{ int read_input_status_parse(uint8_t* buf, size_t buf_len, uint8_t* meaning)
n = 0; {
buf[n] = address; if (buf_len < 8) {
n++; // Недостаточная длина ответа
buf[n] = 0x01; return 0;
n++; }
buf[n] = 0x01; // Проверка контрольной суммы
n++; uint16_t crc = CRC16_Modbus(buf, buf_len - 2);
buf[n] = meaning; uint16_t received_crc = buf[buf_len - 2] + (buf[buf_len - 1] << 8);
n++;
crc_otv = CRC16_Modbus(buf, n); if (crc != received_crc) {
buf[n] = crc_otv & 0xFF; // Контрольная сумма не совпадает
i++; return 0;
buf[n] = (crc_otv >> 8) & 0xFF; }
i++;
return n; *meaning = buf[buf_len - 5];
} return 1;
}
size_t read_input_status(uint8_t address, uint16_t discret_input, unint8_t* buf, size_t buf_len)
{ size_t read_input_register(uint8_t address, uint16_t input_reg, uint8_t* buf, size_t buf_len)
int i=0; {
buf[i] = address; int i = 0;
i++; buf[i] = address;
buf[i] = 0x02; i++;
i++; buf[i] = 0x04;
buf[i] = (discret_input >>8)&0xFF; i++;
i++; buf[i] = (input_reg >> 8) & 0xFF;
buf[i] = discret_input&0xFF; i++;
i++; buf[i] = input_reg & 0xFF;
buf[i] = 0x00; i++;
i++; buf[i] = 0x00;
buf[i] = 0x01; i++;
i++; buf[i] = 0x01;
crc = CRC16_Modbus(buf, i); i++;
buf[i] = crc & 0xFF; uint16_t crc = CRC16_Modbus(buf, i);
i++; buf[i] = crc & 0xFF;
buf[i] = (crc >> 8) & 0xFF; i++;
i++; buf[i] = (crc >> 8) & 0xFF;
return i; i++;
} return i;
}
size_t read_input_status_ans(unit8_t address, uint8_t meaning, unint8_t* buf, size_t buf_len)
{ int read_input_register_parse(uint8_t* buf, size_t buf_len , uint16_t* meaning)
n = 0; {
buf[n] = address; if (buf_len < 5) {
n++; // Недостаточная длина ответа
buf[n] = 0x02; return 0;
n++; }
buf[n] = 0x01;
n++; // Проверка контрольной суммы
buf[n] = meaning; uint16_t crc = CRC16_Modbus(buf, buf_len - 2);
n++; uint16_t received_crc = buf[buf_len - 2] + (buf[buf_len - 1] << 8);
crc_otv = CRC16_Modbus(buf, n);
buf[n] = crc_otv & 0xFF; if (crc != received_crc) {
i++; // Контрольная сумма не совпадает
buf[n] = (crc_otv >> 8) & 0xFF; return 0;
i++; }
return n;
} *meaning = buf[buf_len - 3] + (buf[buf_len - 4] << 8);
return 1;
size_t read_holding_register(uint8_t address, uint16_t holding_reg, unint8_t* buf, size_t buf_len) }
{
int i = 0; size_t forse_single_coil(uint8_t address, uint16_t address_input, int on, uint8_t* buf, size_t buf_len)
buf[i] = address; {
i++; int i = 0;
buf[i] = 0x03; buf[i] = address;
i++; i++;
buf[i] = (holding_reg >> 8) & 0xFF; buf[i] = 0x05;
i++; i++;
buf[i] = holding_reg & 0xFF; buf[i] = (address_input >> 8)&0xFF;
i++; i++;
buf[i] = 0x00; buf[i] = address_input & 0xFF;
i++; i++;
buf[i] = 0x01; buf[i] = on ? 0xFF : 0x00;
i++; i++;
crc = CRC16_Modbus(buf, i); buf[i] = 0x00;
buf[i] = crc & 0xFF; i++;
i++; uint16_t crc = CRC16_Modbus(buf, i);
buf[i] = (crc >> 8) & 0xFF; buf[i] = crc & 0xFF;
i++; i++;
return i; buf[i] = (crc >> 8) & 0xFF;
} i++;
return i;
size_t read_holding_register_ans(unit8_t address, uint8_t meaning, unint8_t* buf, size_t buf_len) }
{
n = 0; int forse_single_coil_parse(uint8_t* buf, size_t buf_len)
buf[n] = address; {
n++; if (buf_len < 8) {
buf[n] = 0x03; // Недостаточная длина ответа
n++; return 0;
buf[n] = 0x01; }
n++;
buf[n] = meaning; // Проверка контрольной суммы
n++; uint16_t crc = CRC16_Modbus(buf, buf_len - 2);
crc_otv = CRC16_Modbus(buf, n); uint16_t received_crc = buf[buf_len - 2] + (buf[buf_len - 1] << 8);
buf[n] = crc_otv & 0xFF;
i++; if (crc != received_crc) {
buf[n] = (crc_otv >> 8) & 0xFF; // Контрольная сумма не совпадает
i++; return 0;
return n; }
}
size_t read_input_register(uint8_t address, uint16_t input_reg, unint8_t* buf, size_t buf_len) return 1;
{ }
int i = 0;
buf[i] = address;
i++;
buf[i] = 0x04;
i++;
buf[i] = (input_reg >> 8) & 0xFF;
i++;
buf[i] = input_reg & 0xFF;
i++;
buf[i] = 0x00;
i++;
buf[i] = 0x01;
i++;
crc = CRC16_Modbus(buf, i);
buf[i] = crc & 0xFF;
i++;
buf[i] = (crc >> 8) & 0xFF;
i++;
return i;
}
size_t read_input_register_ans(unit8_t address, uint8_t meaning, unint8_t* buf, size_t buf_len)
{
n = 0;
buf[n] = address;
n++;
buf[n] = 0x04;
n++;
buf[n] = 0x01;
n++;
buf[n] = meaning;
n++;
crc_otv = CRC16_Modbus(buf, n);
buf[n] = crc_otv & 0xFF;
i++;
buf[n] = (crc_otv >> 8) & 0xFF;
i++;
return n;
}
size_t forse_single_coil(unit8_t address, uint16_t address_input, int on, unint8_t* buf, size_t buf_len)
{
int i = 0;
buf[i] = address;
i++;
buf[i] = 0x05;
i++;
buf[i] = (address_input >> 8)&0xFF;
i++;
buf[i] = address_input & 0xFF;
i++;
buf[i] = on ? 0xFF : 0x00;
i++;
buf[i] = 0x00;
i++
crc = CRC16_Modbus(buf, i);
buf[i] = crc & 0xFF;
i++;
buf[i] = (crc >> 8) & 0xFF;
i++;
return i;
}
size_t forse_single_coil_ans(unit8_t address, uint16_t address_input, int on, unint8_t* buf, size_t buf_len)
{
int i = 0;
buf[i] = address;
i++;
buf[i] = 0x05;
i++;
buf[i] = (address_input >> 8) & 0xFF;
i++;
buf[i] = address_input & 0xFF;
i++;
buf[i] = on ? 0xFF : 0x00;
i++;
buf[i] = 0x00;
i++
crc = CRC16_Modbus(buf, i);
buf[i] = crc & 0xFF;
i++;
buf[i] = (crc >> 8) & 0xFF;
i++;
return i;
}
size_t preset_single_register(unit8_t address, uint16_t address_input, uint16_t recorded_value, unint8_t* buf, size_t buf_len)
{
int i = 0;
buf[i] = address;
i++;
buf[i] = 0x06;
i++;
buf[i] = (address_input >> 8) & 0xFF;
i++;
buf[i] = address_input & 0xFF;
i++;
buf[i] = (recorded_value >> 8) & 0xFF;
i++;
buf[i] = recorded_value & 0xFF;
i++;
crc = CRC16_Modbus(buf, i);
buf[i] = crc & 0xFF;
i++;
buf[i] = (crc >> 8) & 0xFF;
i++;
return i;
}
size_t preset_single_register_ans(unit8_t address, uint16_t address_input, uint16_t recorded_value, unint8_t* buf, size_t buf_len)
{
int i = 0;
buf[i] = address;
i++;
buf[i] = 0x06;
i++;
buf[i] = (address_input >> 8) & 0xFF;
i++;
buf[i] = address_input & 0xFF;
i++;
buf[i] = (recorded_value >> 8) & 0xFF;
i++;
buf[i] = recorded_value & 0xFF;
i++;
crc = CRC16_Modbus(buf, i);
buf[i] = crc & 0xFF;
i++;
buf[i] = (crc >> 8) & 0xFF;
i++;
return i;
}