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Marlin_Firmware/Marlin/src/HAL/HAL_STM32F1/HAL.h
Andy Shaw 624986d423 Ensure ADC conversion is complete before reading (#11336) 
The current Marlin implementation relies on a timer interrupt to start the ADC conversion and read it. However in some circumstances the interrupt can be delayed resulting in insufficient time being available for the ADC conversion. This results in a bad reading and false temperature fluctuations. These changes make sure that the conversion is complete (by checking the ADC hardware via the HAL) before reading a value.

See: https://github.com/MarlinFirmware/Marlin/issues/11323
2018-07-26 03:59:19 -05:00

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/**
* Marlin 3D Printer Firmware
*
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
* Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
* Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
* Copyright (c) 2017 Victor Perez
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
* HAL for stm32duino.com based on Libmaple and compatible (STM32F1)
*/
#ifndef _HAL_STM32F1_H
#define _HAL_STM32F1_H
#define CPU_32_BIT
#undef DEBUG_NONE
#ifndef vsnprintf_P
#define vsnprintf_P vsnprintf
#endif
// --------------------------------------------------------------------------
// Includes
// --------------------------------------------------------------------------
#include <stdint.h>
#include <libmaple/atomic.h>
#include <Arduino.h>
// --------------------------------------------------------------------------
// Undefine DEBUG_ settings
// --------------------------------------------------------------------------
#undef DEBUG_NONE
#undef DEBUG_FAULT
#undef DEBUG_ALL
// --------------------------------------------------------------------------
// Includes
// --------------------------------------------------------------------------
#include "../math_32bit.h"
#include "../HAL_SPI.h"
#include "fastio_Stm32f1.h"
#include "watchdog_Stm32f1.h"
#include "HAL_timers_Stm32f1.h"
// --------------------------------------------------------------------------
// Defines
// --------------------------------------------------------------------------
#if !WITHIN(SERIAL_PORT, -1, 3)
#error "SERIAL_PORT must be from -1 to 3"
#endif
#if SERIAL_PORT == -1
extern USBSerial SerialUSB;
#define MYSERIAL0 SerialUSB
#elif SERIAL_PORT == 0
#define MYSERIAL0 Serial
#elif SERIAL_PORT == 1
#define MYSERIAL0 Serial1
#elif SERIAL_PORT == 2
#define MYSERIAL0 Serial2
#elif SERIAL_PORT == 3
#define MYSERIAL0 Serial3
#endif
#ifdef SERIAL_PORT_2
#if !WITHIN(SERIAL_PORT_2, -1, 3)
#error "SERIAL_PORT_2 must be from -1 to 3"
#elif SERIAL_PORT_2 == SERIAL_PORT
#error "SERIAL_PORT_2 must be different than SERIAL_PORT"
#endif
#define NUM_SERIAL 2
#if SERIAL_PORT_2 == -1
extern USBSerial SerialUSB;
#define MYSERIAL1 SerialUSB
#elif SERIAL_PORT_2 == 0
#define MYSERIAL1 Serial
#elif SERIAL_PORT_2 == 1
#define MYSERIAL1 Serial1
#elif SERIAL_PORT_2 == 2
#define MYSERIAL1 Serial2
#elif SERIAL_PORT_2 == 3
#define MYSERIAL1 Serial3
#endif
#else
#define NUM_SERIAL 1
#endif
// Use HAL_init() to set interrupt grouping.
#define HAL_INIT
void HAL_init();
/**
* TODO: review this to return 1 for pins that are not analog input
*/
#ifndef analogInputToDigitalPin
#define analogInputToDigitalPin(p) (p)
#endif
#define CRITICAL_SECTION_START uint32_t primask = __get_primask(); (void)__iCliRetVal()
#define CRITICAL_SECTION_END if (!primask) (void)__iSeiRetVal()
#define ISRS_ENABLED() (!__get_primask())
#define ENABLE_ISRS() ((void)__iSeiRetVal())
#define DISABLE_ISRS() ((void)__iCliRetVal())
// On AVR this is in math.h?
#define square(x) ((x)*(x))
#ifndef strncpy_P
#define strncpy_P(dest, src, num) strncpy((dest), (src), (num))
#endif
// Fix bug in pgm_read_ptr
#undef pgm_read_ptr
#define pgm_read_ptr(addr) (*(addr))
#define RST_POWER_ON 1
#define RST_EXTERNAL 2
#define RST_BROWN_OUT 4
#define RST_WATCHDOG 8
#define RST_JTAG 16
#define RST_SOFTWARE 32
#define RST_BACKUP 64
// --------------------------------------------------------------------------
// Types
// --------------------------------------------------------------------------
typedef int8_t pin_t;
// --------------------------------------------------------------------------
// Public Variables
// --------------------------------------------------------------------------
/** result of last ADC conversion */
extern uint16_t HAL_adc_result;
// --------------------------------------------------------------------------
// Public functions
// --------------------------------------------------------------------------
// Disable interrupts
#define cli() noInterrupts()
// Enable interrupts
#define sei() interrupts()
// Memory related
#define __bss_end __bss_end__
/** clear reset reason */
void HAL_clear_reset_source (void);
/** reset reason */
uint8_t HAL_get_reset_source (void);
void _delay_ms(const int delay);
/*
extern "C" {
int freeMemory(void);
}
*/
extern "C" char* _sbrk(int incr);
/*
static int freeMemory() {
volatile int top;
top = (int)((char*)&top - reinterpret_cast<char*>(_sbrk(0)));
return top;
}
*/
static int freeMemory() {
volatile char top;
return &top - reinterpret_cast<char*>(_sbrk(0));
}
// SPI: Extended functions which take a channel number (hardware SPI only)
/** Write single byte to specified SPI channel */
void spiSend(uint32_t chan, byte b);
/** Write buffer to specified SPI channel */
void spiSend(uint32_t chan, const uint8_t* buf, size_t n);
/** Read single byte from specified SPI channel */
uint8_t spiRec(uint32_t chan);
// EEPROM
/**
* TODO: Write all this eeprom stuff. Can emulate eeprom in flash as last resort.
* Wire library should work for i2c eeproms.
*/
void eeprom_write_byte(unsigned char *pos, unsigned char value);
unsigned char eeprom_read_byte(unsigned char *pos);
void eeprom_read_block (void *__dst, const void *__src, size_t __n);
void eeprom_update_block (const void *__src, void *__dst, size_t __n);
// ADC
#define HAL_ANALOG_SELECT(pin) pinMode(pin, INPUT_ANALOG);
void HAL_adc_init(void);
#define HAL_START_ADC(pin) HAL_adc_start_conversion(pin)
#define HAL_READ_ADC() HAL_adc_result
#define HAL_ADC_READY() true
void HAL_adc_start_conversion(const uint8_t adc_pin);
uint16_t HAL_adc_get_result(void);
/* Todo: Confirm none of this is needed.
uint16_t HAL_getAdcReading(uint8_t chan);
void HAL_startAdcConversion(uint8_t chan);
uint8_t HAL_pinToAdcChannel(int pin);
uint16_t HAL_getAdcFreerun(uint8_t chan, bool wait_for_conversion = false);
//uint16_t HAL_getAdcSuperSample(uint8_t chan);
void HAL_enable_AdcFreerun(void);
//void HAL_disable_AdcFreerun(uint8_t chan);
*/
#define GET_PIN_MAP_PIN(index) index
#define GET_PIN_MAP_INDEX(pin) pin
#define PARSED_PIN_INDEX(code, dval) parser.intval(code, dval)
#endif // _HAL_STM32F1_H
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