kopia lustrzana https://github.com/SP8EBC/ParaTNC
daily commit
Mateusz Lubecki
rodzic
143aa2698a
commit
9c8f2c0569
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@ -9,17 +9,6 @@
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#define SEPARATE_RX_BUFF
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#define SEPARATE_TX_BUFF
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//extern int srlTXQueueLen;
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//extern int srlTRXDataCounter;
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//extern int srlTXing;
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//extern int srlRXing;
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//extern int srlRXBytesNum;
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//extern char srlRxDummy;
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//extern uint8_t srlStartChar;
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//extern uint8_t srlStopChar;
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//extern int srlIdle;
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typedef enum srlState {
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SRL_NOT_CONFIG,
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SRL_IDLE,
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@ -27,13 +16,15 @@ typedef enum srlState {
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SRL_RXING,
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SRL_TXING,
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SRL_RXING_TXING,
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SRL_RX_DONE
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SRL_RX_DONE,
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SRL_ERROR
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}srlState;
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#define SRL_OK 0
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#define SRL_DATA_TOO_LONG 1
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#define SRL_BUSY 2
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#define SRL_WRONG_BUFFER_PARAM 3
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#define SRL_OK 0
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#define SRL_DATA_TOO_LONG 1
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#define SRL_BUSY 2
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#define SRL_WRONG_BUFFER_PARAM 3
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#define SRL_WRONG_PARAMS_COMBINATION 4
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extern srlState srl_state;
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@ -39,15 +39,17 @@ uint8_t srl_triggered_stop = 0;
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uint8_t srl_start_trigger = 0x00; // znak oznaczaj<61>cy pocz<63>tek istotnych danych do odbebrania
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uint8_t srl_stop_trigger = 0x00; // znak oznaczaj<61>cy koniec istotnych danych do odebrania
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uint8_t srl_garbage_storage;
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volatile uint8_t srl_garbage_storage;
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srlState srl_state = SRL_NOT_CONFIG;
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uint8_t srl_enable_echo = 0;
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char srlStartStopS;
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char srlLenAddr = 0;
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char srlLenModif = 0;
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uint8_t srl_rx_lenght_param_addres = 0;
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uint8_t srl_rx_lenght_param_modifier = 0;
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//char srlLenAddr = 0;
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//char srlLenModif = 0;
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void srl_init(void) {
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#ifdef SEPARATE_TX_BUFF
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@ -119,6 +121,8 @@ uint8_t srl_send_data(uint8_t* data, uint8_t mode, uint16_t leng, uint8_t intern
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// setting a pointer to transmit buffer to the internal buffer inside the driver
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srl_tx_buf_pointer = srl_tx_buffer;
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srl_tx_buf_ln = TX_BUFFER_LN;
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// cleaning the buffer from previous content
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memset(srl_tx_buf_pointer, 0x00, TX_BUFFER_LN);
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@ -139,6 +143,7 @@ uint8_t srl_send_data(uint8_t* data, uint8_t mode, uint16_t leng, uint8_t intern
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else if (internal_external == 1) {
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srl_tx_buf_pointer = data;
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srl_tx_bytes_req = leng;
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srl_tx_buf_ln = leng;
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}
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else return SRL_WRONG_BUFFER_PARAM;
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@ -212,12 +217,17 @@ uint8_t srl_receive_data(int num, char start, char stop, char echo, char len_add
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srl_triggered_stop = 0;
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}
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if (srl_triggered_start == 1 || srl_triggered_stop == 1) {
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if (num < 3)
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return SRL_WRONG_PARAMS_COMBINATION;
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}
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srl_enable_echo = echo;
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srl_rx_bytes_counter = 0;
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srl_rx_bytes_req = num;
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srlLenAddr = len_addr;
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srlLenModif = len_modifier;
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srl_rx_lenght_param_addres = len_addr;
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srl_rx_lenght_param_modifier = len_modifier;
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PORT->CR1 |= USART_CR1_RE; // uruchamianie odbiornika
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PORT->CR1 |= USART_CR1_RXNEIE; // przerwanie od przepe<70>nionego bufora odbioru
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@ -230,19 +240,112 @@ uint8_t srl_receive_data(int num, char start, char stop, char echo, char len_add
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void srl_irq_handler(void) {
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// if any data has been received by the UART controller
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if ((PORT->SR & USART_SR_RXNE) == USART_SR_RXNE) {
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switch (srl_state) {
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default: break;
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}
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// local variable for recalculating a stream length (how many bytes the driver should receives)
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uint16_t len_temp = 0;
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}
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// set to one if there are conditions to stop receiving
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uint8_t stop_rxing = 0;
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// if overrun happened, a byte hadn't been transferred from DR before the next byte is received
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if ((PORT->SR & USART_SR_ORE) == USART_SR_ORE) {
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switch (srl_state) {
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case SRL_RXING:
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break;
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default:
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// if the UART driver is not receiving actually but hardware controler received any data
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// it is required to read value of DR register to clear the interrupt
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srl_garbage_storage = (uint8_t)PORT->DR;
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break;
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}
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}
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// if any data has been received by the UART controller
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if ((PORT->SR & USART_SR_RXNE) == USART_SR_RXNE) {
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switch (srl_state) {
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case SRL_RXING:
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// if there is any data remaining to receive
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if (srl_rx_bytes_counter < srl_rx_bytes_req) {
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// storing received byte into buffer
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srl_rx_buf_pointer[srl_rx_bytes_counter] = (uint8_t)PORT->DR;
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// checking if this byte in stream holds the protocol information about
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// how many bytes needs to be received.
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if (srl_rx_lenght_param_addres == srl_rx_bytes_counter) {
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len_temp = srl_rx_buf_pointer[srl_rx_bytes_counter];
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// adding (or substracting) a length modifier
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len_temp += srl_rx_lenght_param_modifier;
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// if the target length is bigger than buffer size switch to error state
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if (len_temp >= srl_rx_buf_ln) {
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srl_state = SRL_ERROR;
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stop_rxing = 1;
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}
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else {
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srl_rx_bytes_req = len_temp;
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}
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}
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// moving buffer pointer forward
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srl_rx_bytes_counter++;
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}
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// if the user want the driver to stop receiving after certain is received
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if (srl_triggered_stop == 1) {
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if (srl_rx_buf_pointer[srl_rx_bytes_counter - 1] == srl_stop_trigger) {
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}
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}
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// if after incrementing a pointer we reached the end of the buffer
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if (srl_rx_bytes_counter >= srl_rx_bytes_req) {
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// enabling a flag to disble receiver
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stop_rxing = 1;
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// setting a state to receive done
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srl_state = SRL_RX_DONE;
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}
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if (stop_rxing == 1) {
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// disabling UART receiver and its interrupt
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PORT->CR1 &= (0xFFFFFFFF ^ USART_CR1_RE);
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PORT->CR1 &= (0xFFFFFFFF ^ USART_CR1_RXNEIE);
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}
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break;
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// the state when a driver is waiting for start character to appear on serial link
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case SRL_WAITING_TO_RX:
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// storing the value of DR register into local variable to protect against data races
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// which may happened if this IT routine will be preempted by another (long) one
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uint8_t value = (uint8_t)PORT->DR;
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// checking if start character was received
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if (value == srl_start_trigger) {
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// storing received byte in buffer as firts one
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srl_rx_buf_pointer[srl_rx_bytes_counter] = value;
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// increasing the counter value
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srl_rx_bytes_counter++;
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// change state to receiving
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srl_state = SRL_RXING;
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}
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else {
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// if this is not start byte just store it in garbage buffer to clear interrupt condition
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srl_garbage_storage = value;
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}
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break;
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default: break;
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}
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}
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// if one byte was successfully transferred from DR to shift register for transmission over USART
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