mirror of
https://github.com/cosmic-pi-deprecated/cosmicpi-arduino_V1.6.git
synced 2026-05-12 16:09:25 +00:00
James Devine
8282d0a0b1
Compiles, but doesn't run. Left to do: Fix serial output Verify GPS Verify ADC + HV settings Swap accelerometer library Sort out timers (software for now) Confirm serial output format.
36 lines
1.5 KiB
C++
36 lines
1.5 KiB
C++
#ifndef __ASYNCSERIAL__
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#define __ASYNCSERIAL__
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#include <Arduino.h>
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// These two routines are needed because the Serial.print method prints without using interrupts.
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// Calls to Serial.print block interrupts and use a wait in kernel space causing all ISRs to
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// be blocked and hence we could miss some timer interrupts.
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// To avoid this problem call PushTxt to have stuff delivered to the serial line, PushTxt simply
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// stores your text for future print out by PutChar. The PutChar routine removes one character
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// from the stored text each time its called. By placing a call to PutChar in the outermost loop
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// of the Arduino loop function, then for each loop one character is printed, avoiding blocking
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// of interrupts and vastly improving the loops real time behaviour.
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class AsyncSerial {
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// This is the text ring buffer for real time output to serial line with interrupt on
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static const int TBLEN = 1024; // Serial line output ring buffer size, 8K
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char txtb[TBLEN]; // Text ring buffer
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uint32_t txtw, txtr, // Write and Read indexes
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tsze, terr, // Buffer size and error code
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tmax; // The maximum size the buffer reached
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typedef enum { TXT_NOERR=0, TXT_TOOBIG=1, TXT_OVERFL=2 } TxtErr;
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public:
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AsyncSerial(int baudRate);
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// Copy text to the buffer for future printing
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void print(char *txt);
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// Take the next character from the ring buffer and print it, called from the main loop
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void PutChar();
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};
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#endif
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