Improve documentation and beatify pieces of code
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.. _hw_version_detect:
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Automatic Hardware Version detection
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====================================
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Functional Description
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----------------------
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In order to automatically select the available hardware features, the firmware checks the PCB's version
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using vertain pins on the microcontroller.
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The hardware revision is represented by the enum type :c:enum:`hw_revision`. A call to :c:func:`get_pcb_hardware_version` retrieves the revision.
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When the function is called for the first time, it activates pull-up resistors on pin numbers :c:macro:`HW_REV_DETECT_PIN_LOW` to :c:macro:`HW_REV_DETECT_PIN_HIGH`
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on port :c:macro:`HW_REV_DETECT_GPIO` and reads in the binary number.
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The revision is set by externally connecting the pins to ground. The bit pattern read from the port is inverted and then checked internally to derive the hardware version.
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After the version is read for the first time, it is stored internally and subsequent calls to :c:func:`get_pcb_hardware_version` only retrieve the internally stored value to reduce the overhead of the function.
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Hardware Version Dependent Features
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-----------------------------------
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- The settings module searches for an external EEPROM on the SPI interface to store some settings, like the calibration. This is enabled for all versions higher or equal to ``v1.3``.
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- The safety controller enables the acknowledging of the external watchdog for all versions higher or equal to ``v1.3``.
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- The oven driver has a separate safety enable for the solid state relay which it enables on all versions higher or equal to ``v1.3``.
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API Documentation
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-----------------
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.. doxygengroup:: hw-version-detect
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:project: Reflow Controller Firmware
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@ -14,4 +14,5 @@ mechanisms and the behavior. For a detailed code documentation see the doxygen o
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pid-controller
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safety/index
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code/index
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hw-version-detect
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@ -21,4 +21,5 @@ which are used to retain boot information across resets, for example to communic
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flags
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backup-ram
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error-handling
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startup-tests
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stack-checking
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@ -0,0 +1,23 @@
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.. _safety_startup_tests:
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Startup Tests
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=============
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The following tests will be performed after each reset / power cycle of the controller.
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Internal Memory Test
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--------------------
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Directly after startup and after setting up the system clocks, the controller performs memory checks on the internal SRAM and the core coupled memory.
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RAM checking is performed by testing the following sequences:
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- Alternating 0x55AA55AA / 0xAA55AA55 pattern
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- Alternating 0xAA55AA55 / 0x55AA55AA pattern
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- 0xFFFFFFFF constant value
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- 0x00000000 constant value
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The following functions implement the RAM checking:
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.. doxygenfunction:: startup_test_perform_ccm_ram_check
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.. doxygenfunction:: startup_test_perform_system_ram_check
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@ -1,12 +1,32 @@
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/* Reflow Oven Controller
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*
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* Copyright (C) 2021 Mario Hüttel <mario.huettel@gmx.net>
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*
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* This file is part of the Reflow Oven Controller Project.
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*
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* The reflow oven controller is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the reflow oven controller project.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @addtogroup hw-version-detect
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* @{
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*/
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#include <reflow-controller/hw-version-detect.h>
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#include <stm-periph/rcc-manager.h>
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#include <stm32/stm32f4xx.h>
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#define HW_REV_DETECT_GPIO GPIOE
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#define HW_REV_DETECT_RCC_FIELD RCC_AHB1ENR_GPIOEEN
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#define HW_REV_DETECT_PIN_LOW (8U)
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#define HW_REV_DETECT_PIN_HIGH (15U)
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enum hw_revision get_pcb_hardware_version(void)
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{
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uint8_t current_pin;
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@ -46,3 +66,5 @@ enum hw_revision get_pcb_hardware_version(void)
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return revision;
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}
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/** @} */
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@ -1,8 +1,54 @@
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/* Reflow Oven Controller
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*
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* Copyright (C) 2021 Mario Hüttel <mario.huettel@gmx.net>
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*
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* This file is part of the Reflow Oven Controller Project.
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*
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* The reflow oven controller is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the reflow oven controller project.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @addtogroup hw-version-detect
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* @{
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*/
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#ifndef _HW_VERSION_DETECT_H_
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#define _HW_VERSION_DETECT_H_
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#include <stdint.h>
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/**
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* @brief GPIO Port used for hardware version detection
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*/
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#define HW_REV_DETECT_GPIO GPIOE
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/**
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* @brief RCC Clock register mask used to enable @ref HW_REV_DETECT_GPIO GPIO Port
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*/
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#define HW_REV_DETECT_RCC_FIELD RCC_AHB1ENR_GPIOEEN
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/**
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* @brief Lowest pin on @ref HW_REV_DETECT_GPIO GPIO Port that shall be used to read in the hardware version
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*/
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#define HW_REV_DETECT_PIN_LOW (8U)
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/**
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* @brief Highest pin on @ref HW_REV_DETECT_GPIO GPIO Port that shall be used to read in the hardware version
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*/
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#define HW_REV_DETECT_PIN_HIGH (15U)
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/**
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* @brief PCB/Hardware Revision Type
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*/
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@ -32,3 +78,5 @@ enum hw_revision {
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enum hw_revision get_pcb_hardware_version(void);
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#endif /* _HW_VERSION_DETECT_H_ */
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/** @} */
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@ -18,7 +18,6 @@
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __SETTINGS_SETTINGS_H__
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#define __SETTINGS_SETTINGS_H__
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void HardFault_Handler(void)
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{
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/* This is a non recoverable fault. Stop the oven */
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oven_driver_set_power(0);
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oven_driver_apply_power_level();
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