make button and switch changes atomic
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edd2e31321
commit
8b5fc40ee5
137
Core/Src/main.c
137
Core/Src/main.c
@ -49,6 +49,7 @@ UART_HandleTypeDef huart2;
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/* USER CODE BEGIN PV */
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/* Bitwise changed buffer */
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uint8_t old_delta;
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uint8_t delta;
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#define DELTA_KP_BIT 0
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@ -65,27 +66,14 @@ uint8_t i2c_register;
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#define I2C_REGISTER_RFID_PRESENT 4
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#define I2C_REGISTER_RFID_ID 5
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// Keeps track of the current state of receiving on the I2C bus.
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uint8_t i2c_reciving_status;
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uint16_t old_keypad_state = 0;
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uint16_t keypad_state = 0;
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#define I2C_RECEIVING_NONE 0
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#define I2C_RECEIVING_REGISTER 1
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uint16_t old_button_state = 0;
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uint16_t button_state = 0;
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// Keeps track of the current state of transmitting on the I2C bus.
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uint8_t i2c_transmitting_status;
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#define I2C_TRANSMITTING_NONE 0
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#define I2C_TRANSMITTING_REGISTER 1
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uint16_t old_keypad_state;
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uint16_t keypad_state;
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uint16_t old_button_state;
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uint16_t button_state;
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uint8_t old_card_present;
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uint8_t card_present;
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uint8_t old_card_present = 0;
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uint8_t card_present = 0;
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#define CARD_ID_LEN 4
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uint8_t old_card_id[CARD_ID_LEN] = {0};
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@ -107,15 +95,11 @@ static void MX_USART2_UART_Init(void);
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#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
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#endif /* __GNUC__ */
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void init_keypad(void);
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void init_buttons(void);
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void scan_keypad(void);
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void scan_buttons(void);
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void send_iterupt(void);
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void rfid_check_card(void);
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void send_iterupt(void);
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void printBinary(uint16_t num) {
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for (int i = 15; i >= 0; --i) {
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@ -163,35 +147,26 @@ int main(void)
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MX_SPI1_Init();
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MX_USART2_UART_Init();
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/* USER CODE BEGIN 2 */
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init_keypad();
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init_buttons();
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rc522_init();
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// rc522_init();
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HAL_I2C_EnableListen_IT(&hi2c1);
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printf("initialized\r\n");
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// printf("initialized\r\n");
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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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// HAL_Delay(500);
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// HAL_Delay(1);
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scan_keypad();
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scan_buttons();
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rfid_check_card();
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// send_iterupt();
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// rfid_check_card();
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send_iterupt();
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// // ensure we are listening for i2c requests
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// if (i2c_reciving_status == I2C_RECEIVING_NONE) {
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// // listen for a register value
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// HAL_I2C_Slave_Seq_Receive_IT(&hi2c1, &i2c_register, 1, I2C_NEXT_FRAME);
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// i2c_reciving_status = I2C_RECEIVING_REGISTER;
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// }
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// printBinary(keypad_state);
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// printf("s: %d\r\n", keypad_state);
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// printf("r: %d\r\n", recv_cnt);
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// printf("d: %d %d %d %d, %d %d %d %d\r\n", data[0], data[1], data[2], data[3], data[4], data[5], data[6], data[7]);
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// HAL_I2C_Slave_Receive_IT(&hi2c1, (uint8_t*)&data, 8);
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/* USER CODE END WHILE */
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@ -512,7 +487,6 @@ void HAL_I2C_AddrCallback(I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, ui
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} else {
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send_register();
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}
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}
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uint8_t send_data[2];
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@ -521,6 +495,7 @@ void send_register(void) {
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case I2C_REGISTER_DELTA:
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HAL_I2C_Slave_Seq_Transmit_IT(&hi2c1, &delta, 1, I2C_NEXT_FRAME);
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break;
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case I2C_REGISTER_KEYPAD:
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send_data[0] = keypad_state & 0xFF;
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send_data[1] = keypad_state >> 8;
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@ -550,81 +525,15 @@ void send_register(void) {
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void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef *hi2c)
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{
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// uint8_t data[32];
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// int len = sprintf(data, "reg: %d", i2c_register);
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// HAL_UART_Transmit(&huart2, data, len, 0xFFFF);
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send_register();
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}
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void HAL_I2C_SlaveTxCpltCallback(I2C_HandleTypeDef *hi2c)
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{
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}
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//uint8_t send_value;
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//void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef* hi2c)
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//{
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// printf("cb\r\n");
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//
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// if (i2c_reciving_status == I2C_RECEIVING_REGISTER) {
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// i2c_transmitting_status = I2C_TRANSMITTING_REGISTER;
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//
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// switch (i2c_register) {
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// case I2C_REGISTER_DELTA:
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// HAL_I2C_Slave_Seq_Transmit_IT(&hi2c1, &delta, 1, I2C_NEXT_FRAME);
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// break;
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// case I2C_REGISTER_KEYPAD_L:
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// send_value = keypad_state & 0xFF;
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// HAL_I2C_Slave_Seq_Transmit_IT(&hi2c1, &send_value, 1, I2C_NEXT_FRAME);
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// break;
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// case I2C_REGISTER_KEYPAD_H:
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// send_value = keypad_state >> 8;
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// HAL_I2C_Slave_Transmit_IT(&hi2c1, &send_value, 1);
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// break;
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//
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// case I2C_REGISTER_BUTTON_L:
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// send_value = button_state & 0xFF;
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// HAL_I2C_Slave_Transmit_IT(&hi2c1, &send_value, 1);
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// break;
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// case I2C_REGISTER_BUTTON_H:
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// send_value = button_state >> 8;
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// HAL_I2C_Slave_Transmit_IT(&hi2c1, &send_value, 1);
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// break;
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//
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// case I2C_REGISTER_RFID_PRESENT:
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// HAL_I2C_Slave_Transmit_IT(&hi2c1, &card_present, 1);
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// break;
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// case I2C_REGISTER_RFID_ID:
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// HAL_I2C_Slave_Transmit_IT(&hi2c1, card_id, 4);
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// break;
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// }
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// }
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//
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// // TODO: handle any other receiving status possibilities
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//
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// // clear receiving status
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// i2c_reciving_status = I2C_RECEIVING_NONE;
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//}
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void init_keypad(void)
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{
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HAL_GPIO_WritePin(KP_C1_GPIO_Port, KP_C1_Pin, GPIO_PIN_SET);
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HAL_GPIO_WritePin(KP_C2_GPIO_Port, KP_C2_Pin, GPIO_PIN_SET);
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HAL_GPIO_WritePin(KP_C3_GPIO_Port, KP_C3_Pin, GPIO_PIN_SET);
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HAL_GPIO_WritePin(KP_C4_GPIO_Port, KP_C4_Pin, GPIO_PIN_SET);
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}
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void init_buttons(void)
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{
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HAL_GPIO_WritePin(COL1_GPIO_Port, COL1_Pin, GPIO_PIN_SET);
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HAL_GPIO_WritePin(COL2_GPIO_Port, COL2_Pin, GPIO_PIN_SET);
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HAL_GPIO_WritePin(COL3_GPIO_Port, COL3_Pin, GPIO_PIN_SET);
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}
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void scan_keypad(void)
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{
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old_keypad_state = keypad_state;
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keypad_state = 0;
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uint16_t new_keypad_state = 0;
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HAL_GPIO_WritePin(KP_C1_GPIO_Port, KP_C1_Pin, GPIO_PIN_RESET);
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keypad_state |= (HAL_GPIO_ReadPin(KP_R1_GPIO_Port, KP_R1_Pin) == GPIO_PIN_RESET) << 0;
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@ -654,6 +563,8 @@ void scan_keypad(void)
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keypad_state |= (HAL_GPIO_ReadPin(KP_R4_GPIO_Port, KP_R4_Pin) == GPIO_PIN_RESET) << 15;
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HAL_GPIO_WritePin(KP_C4_GPIO_Port, KP_C4_Pin, GPIO_PIN_SET);
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old_keypad_state = keypad_state;
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keypad_state = new_keypad_state;
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if (keypad_state != old_keypad_state) {
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delta |= 1 << DELTA_KP_BIT;
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}
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@ -661,8 +572,7 @@ void scan_keypad(void)
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void scan_buttons(void)
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{
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old_button_state = button_state;
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button_state = 0;
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uint16_t new_button_state = 0;
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HAL_GPIO_WritePin(COL1_GPIO_Port, COL1_Pin, GPIO_PIN_SET);
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button_state |= (HAL_GPIO_ReadPin(ROW1_GPIO_Port, ROW1_Pin) == GPIO_PIN_RESET) << 0;
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@ -687,6 +597,8 @@ void scan_buttons(void)
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// TODO: read the touch sensors here too!
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old_button_state = button_state;
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button_state = new_button_state;
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if (button_state != old_button_state) {
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delta |= 1 << DELTA_KP_BIT;
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}
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@ -714,7 +626,10 @@ void rfid_check_card() {
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void send_iterupt(void)
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{
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HAL_GPIO_WritePin(INT_GPIO_Port, INT_Pin, delta != 0);
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if (delta != old_delta) {
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old_delta = delta;
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HAL_GPIO_WritePin(INT_GPIO_Port, INT_Pin, delta != 0);
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}
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}
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/* USER CODE END 4 */
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