/* u8g_delay.c Universal 8bit Graphics Library Copyright (c) 2011, olikraus@gmail.com All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. void u8g_Delay(uint16_t val) Delay by "val" milliseconds void u8g_MicroDelay(void) Delay be one microsecond void u8g_10MicroDelay(void) Delay by 10 microseconds */ #include "u8g.h" /*==== Part 1: Derive suitable delay procedure ====*/ #if defined(ARDUINO) # if ARDUINO < 100 # include # else # include # endif /* issue 353 */ #if defined(ARDUINO_ARCH_SAMD) # include #endif # if defined(__AVR__) # define USE_AVR_DELAY # elif defined(__PIC32MX) # define USE_PIC32_DELAY # elif defined(__arm__) /* Arduino Due & Teensy */ # define USE_ARDUINO_DELAY # else # define USE_ARDUINO_DELAY # endif #elif defined(_GNU_SOURCE) # define USE_LINUX_DELAY #elif defined(__MSP430__) # define USE_MSP430_DELAY #elif defined(U8G_RASPBERRY_PI) # define USE_RASPBERRYPI_DELAY #elif defined(__AVR__) # define USE_AVR_DELAY #elif defined(__18CXX) # define USE_PIC18_DELAY #elif defined(U8G_CYPRESS_PSOC5) #define USE_PSOC5_DELAY #elif defined(__arm__) || defined(__XTENSA__) /* do not define anything, all procedures are expected to be defined outside u8glib */ /* void u8g_Delay(uint16_t val); void u8g_MicroDelay(void); void u8g_10MicroDelay(void); */ #else # define USE_DUMMY_DELAY #endif /*==== Part 2: Definition of the delay procedures ====*/ /*== Raspberry Pi Delay ==*/ #if defined (USE_RASPBERRYPI_DELAY) #include //#include "/usr/local/include/wiringPi.h" void u8g_Delay(uint16_t val) { //delay(val); //usleep((uint32_t)val*(uint32_t)1000); delayMicroseconds((uint32_t)val*(uint32_t)1000); } void u8g_MicroDelay(void) { usleep(1); } void u8g_10MicroDelay(void) { usleep(10); } #endif #if defined(USE_LINUX_DELAY) void u8g_Delay(uint16_t val) { //delay(val); usleep((uint32_t)val*(uint32_t)1000); } void u8g_MicroDelay(void) { usleep(1); } void u8g_10MicroDelay(void) { usleep(10); } #endif /*== AVR Delay ==*/ #if defined(USE_AVR_DELAY) #include #include #include /* Delay by the provided number of milliseconds. Thus, a 16 bit value will allow a delay of 0..65 seconds Makes use of the _delay_loop_2 _delay_loop_2 will do a delay of n * 4 prozessor cycles. with f = F_CPU cycles per second, n = f / (1000 * 4 ) with f = 16000000 the result is 4000 with f = 1000000 the result is 250 the millisec loop, gcc requires the following overhead: - movev 1 - subwi 2x2 - bne i 2 ==> 7 cycles ==> must be devided by 4, rounded up 7/4 = 2 */ void u8g_Delay(uint16_t val) { /* old version did a call to the arduino lib: delay(val); */ while( val != 0 ) { _delay_loop_2( (F_CPU / 4000 ) -2); val--; } } /* delay by one micro second */ void u8g_MicroDelay(void) { #if (F_CPU / 4000000 ) > 0 _delay_loop_2( (F_CPU / 4000000 ) ); #endif } /* delay by 10 micro seconds */ void u8g_10MicroDelay(void) { #if (F_CPU / 400000 ) > 0 _delay_loop_2( (F_CPU / 400000 ) ); #endif } #endif /*== Delay for PIC18 (not tested) ==*/ #if defined(USE_PIC18_DELAY) #include #define GetSystemClock() (64000000ul) // Hz #define GetInstructionClock() (GetSystemClock()/4) void u8g_Delay(uint16_t val) {/* unsigned int _iTemp = (val); while(_iTemp--) Delay1KTCYx((GetInstructionClock()+999999)/1000000); */ } void u8g_MicroDelay(void) { /* not implemented */ } void u8g_10MicroDelay(void) { /* not implemented */ } #endif /*== Arduino Delay ==*/ #if defined(USE_ARDUINO_DELAY) void u8g_Delay(uint16_t val) { #if defined(__arm__) delayMicroseconds((uint32_t)val*(uint32_t)1000); #else delay(val); #endif } void u8g_MicroDelay(void) { delayMicroseconds(1); } void u8g_10MicroDelay(void) { delayMicroseconds(10); } #endif #if defined(USE_PIC32_DELAY) /* Assume chipkit here with F_CPU correctly defined The problem was, that u8g_Delay() is called within the constructor. It seems that the chipkit is not fully setup at this time, so a call to delay() will not work. So here is my own implementation. */ #define CPU_COUNTS_PER_SECOND (F_CPU/2UL) #define TICKS_PER_MILLISECOND (CPU_COUNTS_PER_SECOND/1000UL) #include "plib.h" void u8g_Delay(uint16_t val) { uint32_t d; uint32_t s; d = val; d *= TICKS_PER_MILLISECOND; s = ReadCoreTimer(); while ( (uint32_t)(ReadCoreTimer() - s) < d ) ; } void u8g_MicroDelay(void) { uint32_t d; uint32_t s; d = TICKS_PER_MILLISECOND/1000; s = ReadCoreTimer(); while ( (uint32_t)(ReadCoreTimer() - s) < d ) ; } void u8g_10MicroDelay(void) { uint32_t d; uint32_t s; d = TICKS_PER_MILLISECOND/100; s = ReadCoreTimer(); while ( (uint32_t)(ReadCoreTimer() - s) < d ) ; } #endif #if defined(USE_MSP430_DELAY) #include #ifndef F_CPU #define F_CPU 1000000UL #endif void u8g_Delay(uint16_t val) { int t; for (t=0; t < val; t++) { __delay_cycles(F_CPU/1000UL); } } void u8g_MicroDelay(void) { __delay_cycles(F_CPU/1000000UL); } void u8g_10MicroDelay(void) { __delay_cycles(F_CPU/100000UL); } #endif #if defined USE_PSOC5_DELAY #include void u8g_Delay(uint16_t val) {CyDelay(val);}; void u8g_MicroDelay(void) {CyDelay(1);}; void u8g_10MicroDelay(void) {CyDelay(10);}; #endif /*== Any other systems: Dummy Delay ==*/ #if defined(USE_DUMMY_DELAY) void u8g_Delay(uint16_t val) { /* do not know how to delay... */ } void u8g_MicroDelay(void) { } void u8g_10MicroDelay(void) { } #endif