UART1 buffered serial driver, requires RTOS
Dependents: Serial_interrupts_buffered HARP2 HARP3
Buffered serial UART1 - Setup to work with UART1 (p13,p14)
Uses RTOS to block current thread.
Reference: http://mbed.org/users/tylerjw/notebook/buffered-serial-with-rtos/
buffered_serial.h
- Committer:
- tylerjw
- Date:
- 2012-12-13
- Revision:
- 3:a4a21e18acd1
- Parent:
- 0:707b9f3904dd
- Child:
- 4:d3122119f92b
File content as of revision 3:a4a21e18acd1:
/* Buffered serial 1 - Setup to work with UART1 (p13,p14) */ #ifndef BUFFERED_SERIAL_H #define BUFFERED_SERIAL_H #define BUFFER_SIZE 255 #define LINE_SIZE 80 #define NEXT(x) ((x+1)&BUFFER_SIZE) #define IS_TX_FULL (((tx_in + 1) & BUFFER_SIZE) == tx_out) #define IS_RX_FULL (((rx_in + 1) & BUFFER_SIZE) == rx_out) #define IS_RX_EMPTY (rx_in == rx_out) #include "mbed.h" #include "rtos.h" class BufferedSerial : public Serial { public: BufferedSerial(PinName tx, PinName rx); void send_line(char*); void read_line(char*); private: void Tx_interrupt(); void Rx_interrupt(); // for disabling the irq IRQn device_irqn; // Circular buffers for serial TX and RX data - used by interrupt routines // might need to increase buffer size for high baud rates char tx_buffer[BUFFER_SIZE]; char rx_buffer[BUFFER_SIZE]; // Circular buffer pointers // volatile makes read-modify-write atomic volatile int tx_in; volatile int tx_out; volatile int rx_in; volatile int rx_out; // Line buffers for sprintf and sscanf char tx_line[LINE_SIZE]; char rx_line[LINE_SIZE]; //DigitalOut led1; // debug //DigitalOut led2; Semaphore rx_sem; Semaphore tx_sem; }; #endif