From: AceVest <zhaoyanbai@126.com>
Date: Fri, 15 Jun 2018 10:17:58 +0000 (+0800)
Subject: atemga328p avr code
X-Git-Url: http://zhaoyanbai.com/repos/zlib_tech.html?a=commitdiff_plain;h=141d762520383f612d45fbcdb3d79196817f90b6;p=acecode.git

atemga328p avr code
---

diff --git a/arduino/hardware/ace/avr/cores/avr/main.cpp b/arduino/hardware/ace/avr/cores/avr/main.cpp
index 9bb79f0..fa5944d 100644
--- a/arduino/hardware/ace/avr/cores/avr/main.cpp
+++ b/arduino/hardware/ace/avr/cores/avr/main.cpp
@@ -7,11 +7,182 @@
  * ------------------------------------------------------------------------
  */
 #include <Arduino.h>
+#include <stdint.h>
+#include <avr/pgmspace.h>
+#include <avr/io.h>
+
+#define __SFR_OFFSET 0x20
+#define _MMIO_BYTE(mem_addr) (*(volatile uint8_t *)(mem_addr))
+#define _SFR_IO8(io_addr) _MMIO_BYTE((io_addr) + __SFR_OFFSET)
+#define SREG _SFR_IO8(0x3F)
+#define DDRB _SFR_IO8(0x04)
+#define PORTB _SFR_IO8(0x05)
+#define clockCyclesPerMicrosecond() ( F_CPU / 1000000L )
+#define clockCyclesToMicroseconds(a) ( (a) / clockCyclesPerMicrosecond() )
+#define MICROSECONDS_PER_TIMER0_OVERFLOW (clockCyclesToMicroseconds(64 * 256))
+#define MILLIS_INC (MICROSECONDS_PER_TIMER0_OVERFLOW / 1000)
+#define FRACT_INC ((MICROSECONDS_PER_TIMER0_OVERFLOW % 1000) >> 3)
+#define FRACT_MAX (1000 >> 3)
+
+#define cli()  __asm__ __volatile__ ("cli" ::: "memory")
+#define sei()  __asm__ __volatile__ ("sei" ::: "memory")
+#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
+
+
+#define __INTR_ATTRS used, externally_visible
+#ifdef __cplusplus
+#  define ISR(vector, ...)            \
+    extern "C" void vector (void) __attribute__ ((signal,__INTR_ATTRS)) __VA_ARGS__; \
+    void vector (void)
+#else
+#  define ISR(vector, ...)            \
+    void vector (void) __attribute__ ((signal,__INTR_ATTRS)) __VA_ARGS__; \
+    void vector (void)
+#endif
+
+volatile unsigned long timer0_overflow_count = 0;
+volatile unsigned long timer0_millis = 0;
+static unsigned char timer0_fract = 0;
+
+ISR(TIMER0_OVF_vect)
+{
+    // copy these to local variables so they can be stored in registers
+    // (volatile variables must be read from memory on every access)
+    unsigned long m = timer0_millis;
+    unsigned char f = timer0_fract;
+
+    m += MILLIS_INC;
+    f += FRACT_INC;
+    if (f >= FRACT_MAX) {
+        f -= FRACT_MAX;
+        m += 1;
+    }
+
+    timer0_fract = f;
+    timer0_millis = m;
+    timer0_overflow_count++;
+}
+
+static void __empty() {
+    // Empty
+}
+//void yield(void) __attribute__ ((weak, alias("__empty")));
+void yield(void) { }
+
+unsigned long micros() {
+    unsigned long m;
+    uint8_t oldSREG = SREG, t;
+
+    cli();
+    m = timer0_overflow_count;
+
+    t = TCNT0;
+    if ((TIFR0 & _BV(TOV0)) && (t < 255)) {
+        m++;
+    }
+    SREG = oldSREG;
+
+    return ((m << 8) + t) * (64 / clockCyclesPerMicrosecond());
+}
+
+void delay(unsigned long ms)
+{
+    uint32_t start = micros();
+    while (ms > 0) {
+        yield();
+        while ( ms > 0 && (micros() - start) >= 1000) {
+            ms--;
+            start += 1000;
+        }
+    }
+}
+
+
+
+
+
+void init() {
+    sei();
+
+    // on the ATmega168, timer 0 is also used for fast hardware pwm
+    // (using phase-correct PWM would mean that timer 0 overflowed half as often
+    // resulting in different millis() behavior on the ATmega8 and ATmega168)
+    sbi(TCCR0A, WGM01);
+    sbi(TCCR0A, WGM00);
+
+    // set timer 0 prescale factor to 64
+    sbi(TCCR0B, CS01);
+    sbi(TCCR0B, CS00);
+
+    // enable timer 0 overflow interrupt
+    sbi(TIMSK0, TOIE0);
+
+#if 0
+    // timers 1 and 2 are used for phase-correct hardware pwm
+    // this is better for motors as it ensures an even waveform
+    // note, however, that fast pwm mode can achieve a frequency of up
+    // 8 MHz (with a 16 MHz clock) at 50% duty cycle
+    TCCR1B = 0;
+    sbi(TCCR1B, CS11);
+//#if F_CPU >= 8000000L
+    sbi(TCCR1B, CS10);
+//#endif
+    // put timer 1 in 8-bit phase correct pwm mode
+    sbi(TCCR1A, WGM10);
+
+    // set timer 2 prescale factor to 64
+    sbi(TCCR2B, CS22);
+    // configure timer 2 for phase correct pwm (8-bit)
+    sbi(TCCR2A, WGM20);
+
+//#if F_CPU >= 16000000 // 16 MHz / 128 = 125 KHz
+    sbi(ADCSRA, ADPS2);
+    sbi(ADCSRA, ADPS1);
+    sbi(ADCSRA, ADPS0);
+//#endif
+    sbi(ADCSRA, ADEN);
+
+    // the bootloader connects pins 0 and 1 to the USART; disconnect them
+    // here so they can be used as normal digital i/o; they will be
+    // reconnected in Serial.begin()
+    UCSR0B = 0;
+#endif
+}
+
 int main()
 {
-	setup();
-	for(;;) {
-		loop();
-	}
-	return 0;
+    init();
+
+    uint8_t pin = 5;
+    uint8_t bit = 1<<pin;
+    volatile uint8_t *reg = ((volatile uint8_t *)((uint16_t)(&DDRB)));
+    volatile uint8_t *out = ((volatile uint8_t *)((uint16_t)(&PORTB)));
+
+    uint8_t oldSREG = SREG;
+    cli();
+    *reg |= bit;
+    SREG = oldSREG;
+
+	const int n = 500;
+
+    for(;;) {
+        delay(n);
+
+        {
+            oldSREG = SREG;
+            cli();
+            *out |= bit;
+            SREG = oldSREG;
+        }
+
+        delay(n);
+
+        {
+            oldSREG = SREG;
+            cli();
+            *out &= ~bit;
+            SREG = oldSREG;
+        }
+    }
+    return 0;
 }
diff --git a/arduino/hardware/ace/avr/platform.txt b/arduino/hardware/ace/avr/platform.txt
index db10579..0f4965b 100644
--- a/arduino/hardware/ace/avr/platform.txt
+++ b/arduino/hardware/ace/avr/platform.txt
@@ -6,7 +6,7 @@
 # https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5-3rd-party-Hardware-specification
 
 name=Ace Arduino AVR Boards
-version=1.6.21
+# version=1.6.21
 
 # AVR compile variables
 # ---------------------