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Better handling of DELAY_NS and DELAY_US (#10716)

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Co-Authored-By: ejtagle <ejtagle@hotmail.com>
This commit is contained in:
Scott Lahteine
2018-05-12 08:34:04 -05:00
committed by GitHub
parent f5aaa2d6c0
commit a1062eec5b
21 changed files with 273 additions and 268 deletions
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3
Marlin/src/HAL/HAL_LPC1768/HAL.cpp
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@ -21,12 +21,13 @@
#ifdef TARGET_LPC1768
#include "../../inc/MarlinConfig.h"
#include "../Delay.h"
HalSerial usb_serial;
// U8glib required functions
extern "C" void u8g_xMicroDelay(uint16_t val) {
delayMicroseconds(val);
DELAY_US(val);
}
extern "C" void u8g_MicroDelay(void) {
u8g_xMicroDelay(1);

6
Marlin/src/HAL/HAL_LPC1768/HAL.h
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@ -68,9 +68,9 @@ extern "C" volatile uint32_t _millis;
#include "HAL_timers.h"
#include "HardwareSerial.h"
#define ST7920_DELAY_1 DELAY_20_NOP;DELAY_20_NOP;DELAY_20_NOP
#define ST7920_DELAY_2 DELAY_20_NOP;DELAY_20_NOP;DELAY_20_NOP;DELAY_10_NOP;DELAY_5_NOP
#define ST7920_DELAY_3 DELAY_20_NOP;DELAY_20_NOP;DELAY_20_NOP;DELAY_10_NOP;DELAY_5_NOP
#define ST7920_DELAY_1 DELAY_NS(600)
#define ST7920_DELAY_2 DELAY_NS(750)
#define ST7920_DELAY_3 DELAY_NS(750)
extern HalSerial usb_serial;

22
Marlin/src/HAL/HAL_LPC1768/SoftwareSerial.cpp
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@ -37,6 +37,7 @@
//
//#include <WInterrupts.h>
#include "../../inc/MarlinConfig.h"
#include "../Delay.h"
#include <stdint.h>
#include <stdarg.h>
#include <Arduino.h>
@ -78,28 +79,9 @@ static const DELAY_TABLE table[] = {
// Private methods
//
#if 0
/* static */
inline void SoftwareSerial::tunedDelay(const uint32_t count) {
asm volatile(
"mov r3, %[loopsPerMicrosecond] \n\t" //load the initial loop counter
"1: \n\t"
"sub r3, r3, #1 \n\t"
"bne 1b \n\t"
://empty output list
:[loopsPerMicrosecond] "r" (count)
:"r3", "cc" //clobber list
);
DELAY_US(count);
}
#else
inline void SoftwareSerial::tunedDelay(const uint32_t count) {
delayMicroseconds(count);
}
#endif
// This function sets the current object as the "listening"
// one and returns true if it replaces another

22
Marlin/src/HAL/HAL_LPC1768/arduino.cpp
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@ -26,6 +26,7 @@
#include <lpc17xx_pinsel.h>
#include "../../inc/MarlinConfig.h"
#include "../Delay.h"
// Interrupts
void cli(void) { __disable_irq(); } // Disable
@ -40,26 +41,9 @@ uint32_t millis() {
return _millis;
}
// This is required for some Arduino libraries we are using
void delayMicroseconds(uint32_t us) {
static const int nop_factor = (SystemCoreClock / 11000000);
static volatile int loops = 0;
//previous ops already burned most of 1us, burn the rest
loops = nop_factor / 4; //measured at 1us
while (loops > 0) --loops;
if (us < 2) return;
us--;
//redirect to delay for large values, then set new delay to remainder
if (us > 1000) {
delay(us / 1000);
us = us % 1000;
}
// burn cycles, time in interrupts will not be taken into account
loops = us * nop_factor;
while (loops > 0) --loops;
DELAY_US(us);
}
extern "C" void delay(const int msec) {

9
Marlin/src/HAL/HAL_LPC1768/u8g_com_HAL_LPC1768_ssd_sw_i2c.cpp under construction
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@ -63,7 +63,6 @@
#include <U8glib.h>
void delayMicroseconds(uint32_t us);
//void pinMode(int16_t pin, uint8_t mode);
//void digitalWrite(int16_t pin, uint8_t pin_status);
@ -122,13 +121,13 @@ uint8_t u8g_i2c_start_sw(uint8_t sla) { // assert start condition and then send
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
delayMicroseconds(2);
DELAY_US(2);
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
delayMicroseconds(2);
DELAY_US(2);
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOSET = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
delayMicroseconds(2);
DELAY_US(2);
LPC_GPIO(SDA_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SDA_pin_HAL_LPC1768_sw_I2C);
delayMicroseconds(2);
DELAY_US(2);
LPC_GPIO(SCL_port_HAL_LPC1768_sw_I2C)->FIOCLR = LPC_PIN(SCL_pin_HAL_LPC1768_sw_I2C);
u8g_i2c_send_byte_sw(I2C_SLA); // send slave address with write bit