/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2024 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "i2c.h"
#include "usart.h"
#include "spi.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdbool.h"
#include "string.h"
#include "stm32wlxx_LoRa_E5_mini.h"
#include "radio_driver.h"
#include "subghz.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
#define MAX_LORA_PAYLOAD_LEN (255)
#define PACKET_FLAGS_HOP_LIMIT_MASK (0x07)
#define PACKET_FLAGS_WANT_ACK_MASK (0x08)
#define PACKET_FLAGS_VIA_MQTT_MASK (0x10)
#define PACKET_FLAGS_HOP_START_MASK (0xE0)
#define PACKET_FLAGS_HOP_START_SHIFT (5)
typedef struct packet_header_s{
uint32_t to, from; // can be 1 byte or four bytes
uint32_t id; // can be 1 byte or 4 bytes
/* Usage of flags:
*
* The bottom three bits of flags are use to store hop_limit when sent over the wire. */
uint8_t flags;
/** The channel hash - used as a hint for the decoder to limit which channels we consider */
uint8_t channel;
/* ***For future use*** Last byte of the NodeNum of the next-hop for this packet */
uint8_t next_hop;
/* ***For future use*** Last byte of the NodeNum of the node that will relay/relayed this packet */
uint8_t relay_node;
} packet_header_t;
typedef struct packet_s {
/* The header, as defined just before */
packet_header_t header;
/* The payload, of maximum length minus the header, aligned just to be sure */
uint8_t payload[MAX_LORA_PAYLOAD_LEN + 1 - sizeof(packet_header_t)] __attribute__((__aligned__));
} packet_t;
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
#define RF_FREQUENCY 906875000 /* Hz */
#define TX_OUTPUT_POWER 17 /* dBm */
#define LORA_BANDWIDTH LORA_BW_250
#define LORA_SPREADING_FACTOR LORA_SF11
#define LORA_CODINGRATE LORA_CR_4_5
#define LORA_PREAMBLE_LENGTH 16 /* Same for Tx and Rx */
#define LORA_SYMBOL_TIMEOUT 16 /* Symbols */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
PacketParams_t packetParams; // TODO: this is lazy...
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
void radio_init();
void radio_cb(RadioIrqMasks_t radioIrq);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
packet_t pkt = {
.header = {
.to = 0x61077475,
.from = 0xdeadbeef,
.id = 0,
.flags = (PACKET_FLAGS_HOP_START_MASK & (3 << PACKET_FLAGS_HOP_START_SHIFT)) | \
(PACKET_FLAGS_WANT_ACK_MASK) | \
(PACKET_FLAGS_HOP_LIMIT_MASK & 3),
.channel = 0,
.next_hop = 0,
.relay_node = 0
},
.payload = "\x01Hello, world!"
};
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART1_UART_Init();
MX_I2C2_Init();
MX_LPUART1_UART_Init();
MX_USART2_UART_Init();
MX_SPI2_Init();
/* USER CODE BEGIN 2 */
radio_init();
do
{
HAL_GPIO_WritePin(LED_GPIO_Port, LED_Pin, GPIO_PIN_SET);
} while(hsubghz.State != HAL_SUBGHZ_STATE_READY);
HAL_Delay(1000);
SUBGRF_SetDioIrqParams( IRQ_TX_DONE | IRQ_RX_DONE | IRQ_PREAMBLE_DETECTED | IRQ_RX_TX_TIMEOUT,
IRQ_TX_DONE | IRQ_RX_DONE | IRQ_PREAMBLE_DETECTED | IRQ_RX_TX_TIMEOUT,
IRQ_RADIO_NONE,
IRQ_RADIO_NONE );
SUBGRF_SetStandby(MODE_STDBY_RC);
HAL_Delay(250);
SUBGRF_SetSwitch(RFO_LP, RFSWITCH_RX);
packetParams.Params.LoRa.PayloadLength = 0xff;
SUBGRF_SetPacketParams(&packetParams);
SUBGRF_SetRx(0x00fffffe);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while(1)
{
/* SUBGRF_SetSwitch(RFO_LP, RFSWITCH_TX);
// Workaround 5.1 in DS.SX1261-2.W.APP (before each packet transmission)
SUBGRF_WriteRegister(0x0889, (SUBGRF_ReadRegister(0x0889) | 0x04));
packetParams.Params.LoRa.PayloadLength = sizeof(packet_header_t) + strlen((char *) pkt.payload);
SUBGRF_SetPacketParams(&packetParams);
pkt.header.id++;
SUBGRF_SendPayload((uint8_t *) &pkt, sizeof(packet_header_t) + 13, 0);
HAL_Delay(5000);*/
HAL_Delay(50);
SUBGRF_SetRx(0x00fffffe);
}
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS_PWR;
RCC_OscInitStruct.HSEDiv = RCC_HSE_DIV2;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
RCC_OscInitStruct.PLL.PLLN = 12;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV4;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Enable the HSE Prescaler
*/
__HAL_RCC_HSE_DIV2_ENABLE();
/** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|RCC_CLOCKTYPE_HCLK
|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
/**
* @brief Initialize the Sub-GHz radio and dependent hardware.
* @retval None
*/
void radio_init(void)
{
uint16_t syncword = 0x24b4;
ModulationParams_t mod_params = {
.PacketType = PACKET_TYPE_LORA,
.Params.LoRa = {
.Bandwidth = LORA_BANDWIDTH,
.CodingRate = LORA_CODINGRATE,
.LowDatarateOptimize = 0x01,
.SpreadingFactor = LORA_SPREADING_FACTOR
}
};
// Initialize the hardware (SPI bus, TCXO control, RF switch)
SUBGRF_Init(radio_cb);
// Use DCDC converter if `DCDC_ENABLE` is defined in radio_conf.h
// "By default, the SMPS clock detection is disabled and must be enabled before enabling the SMPS." (6.1 in RM0453)
SUBGRF_WriteRegister(SUBGHZ_SMPSC0R, (SUBGRF_ReadRegister(SUBGHZ_SMPSC0R) | SMPS_CLK_DET_ENABLE));
SUBGRF_SetRegulatorMode();
// Use the whole 256-byte buffer for both TX and RX
SUBGRF_SetBufferBaseAddress(0x00, 0x00);
SUBGRF_SetRfFrequency(RF_FREQUENCY);
SUBGRF_SetRfTxPower(TX_OUTPUT_POWER);
SUBGRF_SetStopRxTimerOnPreambleDetect(false);
SUBGRF_SetPacketType(PACKET_TYPE_LORA);
SUBGRF_WriteRegister( REG_LR_SYNCWORD, ( syncword >> 8 ) & 0xFF );
SUBGRF_WriteRegister( REG_LR_SYNCWORD + 1, syncword & 0xFF );
SUBGRF_SetModulationParams(&mod_params);
packetParams.PacketType = PACKET_TYPE_LORA;
packetParams.Params.LoRa.CrcMode = LORA_CRC_ON;
packetParams.Params.LoRa.HeaderType = LORA_PACKET_VARIABLE_LENGTH;
packetParams.Params.LoRa.InvertIQ = LORA_IQ_NORMAL;
packetParams.Params.LoRa.PayloadLength = 0xFF;
packetParams.Params.LoRa.PreambleLength = LORA_PREAMBLE_LENGTH;
SUBGRF_SetPacketParams(&packetParams);
SUBGRF_SetLoRaSymbNumTimeout(LORA_SYMBOL_TIMEOUT);
// WORKAROUND - Optimizing the Inverted IQ Operation, see DS_SX1261-2_V1.2 datasheet chapter 15.4
// RegIqPolaritySetup @address 0x0736
SUBGRF_WriteRegister( 0x0736, SUBGRF_ReadRegister( 0x0736 ) | ( 1 << 2 ) );
}
void radio_cb(RadioIrqMasks_t radio_irq)
{
packet_t pkt;
uint8_t size;
if(radio_irq & IRQ_TX_DONE)
{
HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
}
if(radio_irq & IRQ_RX_DONE)
{
HAL_GPIO_WritePin(LED_GPIO_Port, LED_Pin, GPIO_PIN_SET);
SUBGRF_GetPayload((uint8_t *) &pkt, &size, MAX_LORA_PAYLOAD_LEN);
}
if(radio_irq & IRQ_PREAMBLE_DETECTED)
{
HAL_GPIO_WritePin(LED_GPIO_Port, LED_Pin, GPIO_PIN_RESET);
}
if(radio_irq & IRQ_SYNCWORD_VALID)
{
HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
}
if(radio_irq & IRQ_HEADER_VALID)
{
HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
}
if(radio_irq & IRQ_HEADER_ERROR)
{
HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
}
if(radio_irq & IRQ_CRC_ERROR)
{
HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
}
if(radio_irq & IRQ_CAD_CLEAR)
{
HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
}
if(radio_irq & IRQ_CAD_DETECTED)
{
HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
}
if(radio_irq & IRQ_RX_TX_TIMEOUT)
{
/* */
}
else
{
/* */
}
SUBGRF_ClearIrqStatus(radio_irq);
}
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */