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// TODO Makefile
#include <modbus.h>
/* If using CubeMX, the HAL library files will be automatically placed in the correct location. The examples were tested with the Makefile option in CubeMX. */
/* If you are not using CubeMX to initialize the project, you are on your own */
/* In order to run the example, you will need to copy the device initialization, superloop code as well as the external function initializations from this file */
/* Function initialization for the STM32 HAL Library */
/* Since this library was orignally written to work with the STM32 HAL/LL API, the UART functions match perfectly and can be directly mapped to the Modbus library functions */
MB_StatusTypeDef (*MB_UART_Tx)(void*, uint16_t*, uint8_t*, uint8_t*) = &HAL_UART_Transmit;
MB_StatusTypeDef (*MB_UART_Rx)(void*, uint16_t*, uint8_t*, uint8_t*) = &HAL_UART_Receive;
int main()
{
/* Single modbus device node */
modbus_slave_device modbus_dev_single;
/* Multiple modbus device nodes.. after all what is the point of using Modbus in a single point-to-point connection? */
/* Not illustrated beyond the definition, but should be clear enough */
modbus_slave_device modbus_dev_multiple[10];
/* Set the slave ID to 1 */
modbus_dev_single.slave_id = 1;
/* Attach the UART device on the STM32 to this node */
modbus_dev_single.modbus_uart = &huart1;
/* Continuously read the 30001 input register */
uint16_t register = 30001;
while (1) {
MB_StatusTypeDef status = ReadInputRegisters(modbus_dev_single, register, 1);
if (status == MB_OK) {
/* Do something with data in the response buffer */
/* ... */
ClearResponseBuffer(&modbus_dev_single);
}
}
return 1;
}
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