Better Serial C++ class library with interrupt
Dependents: Dumb_box_rev2 mbed_GPSproject
iSerial class library can easy be used just by swapping Serial declarations.
API
iSerial | |
Examples
#include "mbed.h" #include "iSerial.h" char s[] = "12345678901234567890123456789012345678901234567890"; int main() { iSerial pc(USBTX,USBRX); char* c = s; while(1) { pc.puts(s); while(pc.readable()){ int ret = pc.getc(); if(ret) *c++ = ret; if(c >= s+sizeof(s)-1) c = s; } wait(1); } }
Example 2
Comparing speed of ordinary Serial functions
#include "mbed.h" #include "iSerial.h" char s[] = "12345678901234567890123456789012345678901234567890"; // 50 bytes int main() { Timer t; Serial pc(USBTX,USBRX); pc.baud(921600); t.reset(); t.start(); for(int i=0; i<30; i++) { pc.printf(s); wait(0.001); } t.stop(); int t1 = t.read_us(); pc.puts("\n\n\n"); iSerial ipc(USBTX,USBRX,NULL,1000,100); // try NOT to set the buffer over flowed // iSerial ipc(USBTX,USBRX); // set as default = 100, 100 ipc.baud(921600); t.reset(); t.start(); for(int i=0; i<30; i++) { ipc.printf(s); wait(0.001); } t.stop(); int t2 = t.read_us(); ipc.printf("\n\n\nThe time %d, %d [us] was taken.\n", t1, t2); ipc.puts("End."); ipc.flush(); }
Diff: iSerial.cpp
- Revision:
- 7:5a25789c3b55
- Parent:
- 6:8d4b95b90c3b
- Child:
- 8:20759f992d48
diff -r 8d4b95b90c3b -r 5a25789c3b55 iSerial.cpp --- a/iSerial.cpp Mon Sep 03 12:01:55 2012 +0000 +++ b/iSerial.cpp Mon Sep 03 17:26:38 2012 +0000 @@ -10,7 +10,7 @@ #include "iSerial.h" -//DigitalOut led1(LED1); +DigitalOut led4(LED4); void @@ -45,6 +45,37 @@ } } +void +iSerial::disable_uart_irq(void) +{ + switch(tx){ + case USBTX: + #if defined(TARGET_LPC1768) + NVIC_DisableIRQ(UART2_IRQn); + #elif defined(TARGET_LPC11U24) + NVIC_DisableIRQ(UART_IRQn); + #endif +// led1 = !led1; + break; + + case p9: + #if defined(TARGET_LPC1768) + NVIC_DisableIRQ(UART1_IRQn); + #elif defined(TARGET_LPC11U24) + NVIC_DisableIRQ(UART_IRQn); + #endif + break; + + #if defined(TARGET_LPC1768) + case p13: + NVIC_DisableIRQ(UART3_IRQn); + break; + case p28: + NVIC_DisableIRQ(UART0_IRQn); + break; + #endif + } +} /* * Interrupt Function @@ -52,21 +83,22 @@ void iSerial::rx_handler(void) { +// disable_uart_irq(); if(Serial::readable()){ rxbuf.save(Serial::getc()); } - enable_uart_irq(); +// enable_uart_irq(); } void iSerial::tx_handler(void) { - if(Serial::writeable()){ - if(txbuf.check()){ - Serial::putc( txbuf.read() ); - } - } - enable_uart_irq(); +led4 = 1; +// disable_uart_irq(); + while(Serial::writeable() && txbuf.check()) + Serial::putc( txbuf.read() ); +// enable_uart_irq(); +led4 = 0; } iSerial::iSerial(PinName _tx, PinName _rx, const char *_name, int _txbufsize, int _rxbufsize) @@ -107,7 +139,8 @@ { unsigned short int c; - while(!rxbuf.check()); + while(!rxbuf.check()) // wait receiving a character + enable_uart_irq(); c = rxbuf.read(); return c; @@ -120,7 +153,13 @@ Serial::putc(ch); } else { - while(txbuf.full()); + while(txbuf.full()){ + disable_uart_irq(); + tx_handler(); + enable_uart_irq(); + } + + disable_uart_irq(); txbuf.save(ch); enable_uart_irq(); } @@ -161,7 +200,8 @@ void iSerial::flush(void) { - while(txbuf.check()); + while(txbuf.check()) + enable_uart_irq(); }