438 lines
13 KiB
C
438 lines
13 KiB
C
/* USER CODE BEGIN Header */
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/**
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******************************************************************************
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* @file : main.c
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* @brief : Main program body
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2025 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* USER CODE END Header */
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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#include "dma.h"
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#include "i2c.h"
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#include "tim.h"
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#include "usart.h"
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#include "usb_device.h"
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#include "gpio.h"
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/* Private includes ----------------------------------------------------------*/
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/* USER CODE BEGIN Includes */
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#include "usbd_hid.h"
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/* USER CODE END Includes */
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/* Private typedef -----------------------------------------------------------*/
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/* USER CODE BEGIN PTD */
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// HID (Human Interface Device) report structure
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typedef struct {
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uint8_t MODIFIER; // Modifier keys (e.g., Ctrl, Shift, Alt, GUI/Win)
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uint8_t RESERVED; // Reserved for alignment, always set to 0
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uint8_t KEYPRESS[12]; // Array holding up to 12 keycodes being pressed
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} HIDReport;
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// Switch pin mapping structure
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typedef struct {
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GPIO_TypeDef* GPIOx; // Pointer to GPIO port (e.g., GPIOA, GPIOB)
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uint16_t PIN; // Pin number on the GPIO port
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} SwitchPins;
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// UART message structure for sending/receiving key events
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typedef struct {
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uint16_t DEPTH; // Custom field: could represent queue depth, layer, or message size
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uint16_t TYPE; // Message type identifier (defines what kind of message this is)
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uint8_t KEYPRESS[12]; // Keypress data (similar to HIDReport, but for UART transmission)
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} UARTMessage;
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/* USER CODE END PTD */
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/* Private define ------------------------------------------------------------*/
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/* USER CODE BEGIN PD */
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/* USER CODE END PD */
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/* Private macro -------------------------------------------------------------*/
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/* USER CODE BEGIN PM */
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#define ROW 6
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#define COL 5
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#define MAXQUEUE 256
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#define MODE_INACTIVE 0
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#define MODE_MAINBOARD 1
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#define MODE_ACTIVE 2
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#define MODE_DEBUG 3
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#define UART_RX_BUFF_SIZE 64
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/* USER CODE END PM */
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/* Private variables ---------------------------------------------------------*/
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/* USER CODE BEGIN PV */
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// Initialize HID report properly
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HIDReport REPORT = {0, 0, {0}};
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UARTMessage RX5Msg; //Buffer for messages on uart5
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UARTMessage RX1Msg; //Buffer for messages on uart5
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UARTMessage RX2Msg; //Buffer for messages on uart5
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UARTMessage RX4Msg; //Buffer for messages on uart5
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SwitchPins ROW_PINS[ROW] = {
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{GPIOB, GPIO_PIN_10},
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{GPIOB, GPIO_PIN_2},
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{GPIOB, GPIO_PIN_1},
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{GPIOB, GPIO_PIN_0},
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{GPIOC, GPIO_PIN_5},
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{GPIOC, GPIO_PIN_4},
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};
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SwitchPins COLUMN_PINS[COL] = {
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{GPIOA, GPIO_PIN_8},
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{GPIOC, GPIO_PIN_9},
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{GPIOC, GPIO_PIN_8},
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{GPIOC, GPIO_PIN_7},
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{GPIOC, GPIO_PIN_5}
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};
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// Initialize keycodes array
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uint8_t KEYCODES[ROW][COL] = {
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{0x00, KEY_F13, KEY_F14, KEY_F15, KEY_F16},
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{KEY_F17, NUM_LOCK, KEYPAD_SLASH, KEYPAD_ASTERISK, KEYPAD_MINUS},
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{KEY_F18, KEYPAD_7, KEYPAD_8, KEYPAD_9, KEYPAD_PLUS},
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{KEY_F19, KEYPAD_4, KEYPAD_5, KEYPAD_6, 0x00},
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{KEY_F20, KEYPAD_1, KEYPAD_2, KEYPAD_3, KEYPAD_ENTER},
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{KEY_F21, KEYPAD_0, 0x00, KEYPAD_DOT, 0x00}
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};
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uint16_t DEPTH = 0;
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uint16_t PORT_DEPTH[] = {0xFF, 0xFF, 0xFF, 0xFF};
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UART_HandleTypeDef* PARENT;
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UART_HandleTypeDef* PORTS[] = {&huart5, &huart1, &huart2, &huart4};
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//North East South West
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extern USBD_HandleTypeDef hUsbDeviceFS;
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volatile uint8_t MODE = MODE_INACTIVE;
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/* USER CODE END PV */
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/* Private function prototypes -----------------------------------------------*/
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void SystemClock_Config(void);
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/* USER CODE BEGIN PFP */
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void handleUARTMessages(uint8_t *data, UART_HandleTypeDef *huart);
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void UART_DMA_SendReport(UART_HandleTypeDef *huart);
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void addUSBReport(uint8_t usageID);
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void handleUARTMessages(uint8_t *data, UART_HandleTypeDef *sender);
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void matrixScan(void);
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void resetReport(void);
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void sendMessage(void);
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void findBestParent();
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/* USER CODE END PFP */
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/* Private user code ---------------------------------------------------------*/
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/* USER CODE BEGIN 0 */
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/* USER CODE END 0 */
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/**
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* @brief The application entry point.
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* @retval int
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*/
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int main(void)
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{
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/* USER CODE BEGIN 1 */
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/* USER CODE END 1 */
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/* MCU Configuration--------------------------------------------------------*/
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/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
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HAL_Init();
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/* USER CODE BEGIN Init */
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/* USER CODE END Init */
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/* Configure the system clock */
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SystemClock_Config();
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/* USER CODE BEGIN SysInit */
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/* USER CODE END SysInit */
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/* Initialize all configured peripherals */
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MX_GPIO_Init();
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MX_DMA_Init();
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MX_TIM2_Init();
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MX_TIM3_Init();
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MX_UART4_Init();
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MX_UART5_Init();
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MX_USART1_UART_Init();
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MX_USART2_UART_Init();
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MX_I2C1_Init();
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MX_USB_DEVICE_Init();
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/* USER CODE BEGIN 2 */
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//Enable UART RX DMA for all ports
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HAL_UART_Receive_DMA(&huart1, (uint8_t*)&RX1Msg, sizeof(UARTMessage));
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HAL_UART_Receive_DMA(&huart2, (uint8_t*)&RX2Msg, sizeof(UARTMessage));
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HAL_UART_Receive_DMA(&huart4, (uint8_t*)&RX4Msg, sizeof(UARTMessage));
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HAL_UART_Receive_DMA(&huart5, (uint8_t*)&RX5Msg, sizeof(UARTMessage));
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/* USER CODE END 2 */
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/* Infinite loop */
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/* USER CODE BEGIN WHILE */
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while (1)
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{
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switch (MODE){
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case MODE_ACTIVE:
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resetReport();
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matrixScan();
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UARTMessage UARTREPORT;
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UARTREPORT.DEPTH = DEPTH;
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UARTREPORT.TYPE = 0xEE;
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memcpy(UARTREPORT.KEYPRESS, REPORT.KEYPRESS, sizeof(UARTREPORT.KEYPRESS));
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HAL_UART_Transmit_DMA(PARENT, (uint8_t*)&UARTREPORT, sizeof(UARTREPORT));
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break;
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case MODE_INACTIVE:
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//If the module is connected through the USB then mode is mainboard
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if(hUsbDeviceFS.dev_state == USBD_STATE_CONFIGURED){
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MODE = MODE_MAINBOARD;
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DEPTH = 0;
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}else{
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//TODO: Look for a parent module...
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UARTMessage REQ;
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REQ.DEPTH = 0;
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REQ.TYPE = 0xFF; //Message code for request is 0xFF
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memset(REQ.KEYPRESS, 0, sizeof(REQ.KEYPRESS));
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//Send querty for parent module
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HAL_UART_Transmit_DMA(&huart1, (uint8_t*)&REQ, sizeof(REQ));
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HAL_UART_Transmit_DMA(&huart2, (uint8_t*)&REQ, sizeof(REQ));
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HAL_UART_Transmit_DMA(&huart4, (uint8_t*)&REQ, sizeof(REQ));
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HAL_UART_Transmit_DMA(&huart5, (uint8_t*)&REQ, sizeof(REQ));
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HAL_Delay(500);
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findBestParent(); //So true...
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}
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break;
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case MODE_MAINBOARD:
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resetReport();
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matrixScan();
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USBD_HID_SendReport(&hUsbDeviceFS, (uint8_t*)&REPORT, sizeof(REPORT));
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break;
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default:
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break;
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}
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HAL_Delay(50);
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/* USER CODE END WHILE */
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/* USER CODE BEGIN 3 */
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}
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/* USER CODE END 3 */
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}
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/**
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* @brief System Clock Configuration
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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RCC_OscInitTypeDef RCC_OscInitStruct = {0};
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RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
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/** Configure the main internal regulator output voltage
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*/
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__HAL_RCC_PWR_CLK_ENABLE();
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
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/** Initializes the RCC Oscillators according to the specified parameters
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* in the RCC_OscInitTypeDef structure.
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*/
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 4;
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RCC_OscInitStruct.PLL.PLLN = 96;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 4;
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RCC_OscInitStruct.PLL.PLLR = 2;
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if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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{
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Error_Handler();
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}
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/** Initializes the CPU, AHB and APB buses clocks
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*/
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RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
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|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV2;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
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if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
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{
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Error_Handler();
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}
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}
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/* USER CODE BEGIN 4 */
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// UART Message Requests Goes Here
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void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {
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if (huart->Instance == USART1) {
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handleUARTMessages((uint8_t*)&RX1Msg, &huart1);
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HAL_UART_Receive_DMA(&huart1, (uint8_t*)&RX1Msg, sizeof(UARTMessage));
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}
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else if (huart->Instance == USART2) {
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handleUARTMessages((uint8_t*)&RX2Msg, &huart2);
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HAL_UART_Receive_DMA(&huart2, (uint8_t*)&RX2Msg, sizeof(UARTMessage));
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}
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else if (huart->Instance == UART4) {
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handleUARTMessages((uint8_t*)&RX4Msg, &huart4);
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HAL_UART_Receive_DMA(&huart4, (uint8_t*)&RX4Msg, sizeof(UARTMessage));
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}
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else if (huart->Instance == UART5) {
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handleUARTMessages((uint8_t*)&RX5Msg, &huart5);
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HAL_UART_Receive_DMA(&huart5, (uint8_t*)&RX5Msg, sizeof(UARTMessage));
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}
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}
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void findBestParent(){
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//Find least depth parent
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uint16_t least_val = 0xFF;
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UART_HandleTypeDef* least_port = NULL;
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for(uint8_t i = 0; i < 4; i++){
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if(PORT_DEPTH[i]<least_val){
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least_port = PORTS[i];
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least_val = PORT_DEPTH[i];
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}
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}
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//Assign if valid
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if(least_val < 0xFF){
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PARENT = least_port;
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DEPTH = least_val + 1;
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MODE = MODE_ACTIVE;
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HAL_Delay(500);
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}
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}
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// Called when UART RX interrupt completes
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void handleUARTMessages(uint8_t *data, UART_HandleTypeDef *sender) {
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UARTMessage msg;
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UARTMessage reply;
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// Parse incoming message into struct
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memcpy(&msg, data, sizeof(UARTMessage));
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switch(msg.TYPE) {
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// Parent request reply
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case 0xAA:
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if(sender == &huart5) {
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PORT_DEPTH[0] = msg.DEPTH;
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} else if(sender == &huart1) {
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PORT_DEPTH[1] = msg.DEPTH;
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} else if(sender == &huart2) {
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PORT_DEPTH[2] = msg.DEPTH;
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} else if(sender == &huart4) {
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PORT_DEPTH[3] = msg.DEPTH;
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}
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break;
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// Requested to be a parent
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case 0xFF:
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if(MODE!=MODE_INACTIVE){
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reply.TYPE = 0xAA;
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reply.DEPTH = DEPTH; // use your local DEPTH
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memset(reply.KEYPRESS, 0, sizeof(reply.KEYPRESS));
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HAL_UART_Transmit_DMA(sender, (uint8_t*)&reply, sizeof(reply));
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}
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break;
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case 0xEE:
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//TODO: Append message to the thingy
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break;
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default:
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break;
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}
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}
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void addUSBReport(uint8_t usageID){
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if(usageID < 0x04 || usageID > 0x73) return; //Usage ID is out of bounds
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uint16_t bit_index = usageID - 0x04; //Offset, UsageID starts with 0x04. Gives us the actual value of the bit
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uint8_t byte_index = bit_index/8; //Calculates which byte in the REPORT array
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uint8_t bit_offset = bit_index%8; //Calculates which bits in the REPORT[byte_index] should be set/unset
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REPORT.KEYPRESS[byte_index] |= (1 << bit_offset);
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}
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void matrixScan(void){
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for (uint8_t col = 0; col < COL; col++){
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HAL_GPIO_WritePin(COLUMN_PINS[col].GPIOx, COLUMN_PINS[col].PIN, GPIO_PIN_SET);
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HAL_Delay(1);
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for(uint8_t row = 0; row < ROW; row++){
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if(HAL_GPIO_ReadPin(ROW_PINS[row].GPIOx, ROW_PINS[row].PIN)){
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addUSBReport(KEYCODES[row][col]);
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}
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}
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HAL_GPIO_WritePin(COLUMN_PINS[col].GPIOx, COLUMN_PINS[col].PIN, GPIO_PIN_RESET);
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}
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}
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void resetReport(void){
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REPORT.MODIFIER = 0;
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memset(REPORT.KEYPRESS, 0, sizeof(REPORT.KEYPRESS));
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}
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/* USER CODE END 4 */
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/**
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* @brief This function is executed in case of error occurrence.
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* @retval None
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*/
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void Error_Handler(void)
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{
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/* USER CODE BEGIN Error_Handler_Debug */
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/* User can add his own implementation to report the HAL error return state */
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__disable_irq();
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while (1)
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{
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}
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/* USER CODE END Error_Handler_Debug */
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* USER CODE BEGIN 6 */
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* USER CODE END 6 */
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}
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#endif /* USE_FULL_ASSERT */
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