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4key miku keyboard with nkro

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This commit is contained in:
Oliver "Kim" Avecilla Cabral
2025-07-01 15:13:32 -07:00
parent 3ecab0344c
commit 4caceb3617
3 changed files with 171 additions and 39 deletions
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69
firmware/components/mainboard/stmf446retx/Src/main.c
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@@ -33,21 +33,14 @@
typedef struct{
uint8_t MODIFIER;
uint8_t RESERVED;
uint8_t KEYSTATUS[13];
uint8_t KEYPRESS[13];
} HIDReport;
typedef struct{
uint16_t PORT;
GPIO_TypeDef* PORT;
uint16_t PIN;
} KbdPins;
typedef struct{
uint8_t PREV; //Previous State
uint8_t CURR; //Current State
uint8_t KEYCODE;
} Key;
extern USBD_HandleTypeDef hUsbDeviceFS;
/* USER CODE END PTD */
@@ -65,9 +58,9 @@ extern USBD_HandleTypeDef hUsbDeviceFS;
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
Key matrix[ROWS][COLS] = {
{{0,0,0x01},{0,0,0x0C}},
{{0,0,0x0E},{0,0,0x18}},
uint8_t matrix[ROWS][COLS] = {
{KEY_M, KEY_K},
{KEY_I, KEY_U}
};
KbdPins row_pins[ROWS] = {
{GPIOC, GPIO_PIN_6},
@@ -77,12 +70,13 @@ KbdPins col_pins[COLS] = {
{GPIOB, GPIO_PIN_14},
{GPIOB, GPIO_PIN_13}
};
HIDReport REPORT = {0,0,0,0,0,0,0,0};
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
void addHIDReport(uint8_t usageID, uint8_t isPressed);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
@@ -98,8 +92,6 @@ int main(void)
{
/* USER CODE BEGIN 1 */
HIDReport report = {0,0,0,0,0,0,0,0};
uint8_t report_buff[] = {0,0,0,0,0,0};
/* USER CODE END 1 */
@@ -131,33 +123,26 @@ int main(void)
/* USER CODE BEGIN WHILE */
while (1)
{
//Keycode Scan
// for(int col = 0; col < COLS; col++){
// HAL_GPIO_WritePin(col_pins[col].PORT, col_pins[col].PIN, GPIO_PIN_SET);
// for(int row = 0; row < ROWS; row++){
// uint8_t state = HAL_GPIO_ReadPin(row_pins[row].PORT, col_pins[row].PIN);
// if(state != matrix[row][col].PREV){
// matrix[row][col].PREV = matrix[row][col].CURR;
// matrix[row][col].CURR = state;
// if(state){
// //Put into the buffer
// if(report_buff)
// }
// }
// }
// }
/* USER CODE END WHILE */
report.KEYSTATUS[0] = 0x01;
USBD_HID_SendReport(&hUsbDeviceFS, (uint8_t*)&report, sizeof(report));
HAL_Delay(1000);
for(int col = 0; col < COLS; col++){
HAL_GPIO_WritePin(col_pins[col].PORT, col_pins[col].PIN, GPIO_PIN_SET);
HAL_Delay(1);
for(int row = 0; row < ROWS; row++){
if(HAL_GPIO_ReadPin(row_pins[row].PORT, row_pins[row].PIN)){
addHIDReport(matrix[row][col], 1);
}else{
addHIDReport(matrix[row][col], 0);
}
}
HAL_GPIO_WritePin(col_pins[col].PORT, col_pins[col].PIN, GPIO_PIN_RESET);
}
USBD_HID_SendReport(&hUsbDeviceFS, (uint8_t*)&REPORT, sizeof(REPORT));
HAL_Delay(20);
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
@@ -205,7 +190,19 @@ void SystemClock_Config(void)
}
/* USER CODE BEGIN 4 */
//Converts UsageID to NKRO bit field and add it to the report
void addHIDReport(uint8_t usageID, uint8_t isPressed){
if(usageID < 0x04 || usageID > 0x73) return; //Usage ID is out of bounds
uint16_t bit_index = usageID - 0x04; //Offset, UsageID starts with 0x04. Gives us the actual value of the bit
uint8_t byte_index = bit_index/8; //Calculates which byte in the REPORT array
uint8_t bit_offset = bit_index%8; //Calculates which bits in the REPORT[byte_index] should be set/unset
if(isPressed){
REPORT.KEYPRESS[byte_index] |= (1 << bit_offset);
}else{
REPORT.KEYPRESS[byte_index] &= ~(1 << bit_offset);
}
}
/* USER CODE END 4 */
/**