Add fault modes and start implementation of backup SRAM. However, this will probably never be used

stm-firmware/Makefile

@@ -35,7 +35,7 @@ DEFINES += -DSHELLMATTA_HELP_ALIAS=\"?\"
 
 # RCC Manager
 CFILES += stm-periph/clock-enable-manager.c
-CFILES += stm-periph/uart.c stm-periph/dma-ring-buffer.c
+CFILES += stm-periph/uart.c stm-periph/dma-ring-buffer.c stm-periph/backup-ram.c
 CFILES += digio.c
 CFILES += stm-periph/unique-id.c
 CFILES += calibration.c
@@ -43,12 +43,11 @@ CFILES += temp-converter.c
 CFILES += rotary-encoder.c button.c
 CFILES += stack-check.c
 CFILES += ui/lcd.c ui/menu.c reflow-menu.c
-#CFILES += onewire-temp-sensors.c
 CFILES += fatfs/diskio.c fatfs/ff.c fatfs/ffsystem.c fatfs/ffunicode.c fatfs/shimatta_sdio_driver/shimatta_sdio.c
 CFILES += pid-controller.c oven-driver.c
 CFILES += settings/settings.c settings/settings-sd-card.c
 
-CFILES += safety/safety-adc.c safety/safety-controller.c safety/watchdog.c
+CFILES += safety/safety-adc.c safety/safety-controller.c safety/watchdog.c safety/fault.c
 
 DEBUG_DEFINES = -DDEBUGBUILD
 RELEASE_DEFINES =

stm-firmware/include/reflow-controller/safety/fault.h

@@ -0,0 +1,28 @@
+/* Reflow Oven Controller
+ *
+ * Copyright (C) 2020  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of the Reflow Oven Controller Project.
+ *
+ * The reflow oven controller is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The Reflow Oven Control Firmware 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 the reflow oven controller project.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @brief This function implements the panic mode
+ *
+ * This function will never return and ensures that the controller goes in a safe operating state
+ * The watchdog will eventually reset the controller from this state. Therefore, this function sets
+ * a flag in the backup SRAM that will prevent the controller from booting in normal operation.
+ */
+void panic_mode(void);

stm-firmware/include/stm-periph/backup-ram.h

@@ -0,0 +1,51 @@
+/* Reflow Oven Controller
+ *
+ * Copyright (C) 2020  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of the Reflow Oven Controller Project.
+ *
+ * The reflow oven controller is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The Reflow Oven Control Firmware 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 the reflow oven controller project.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+
+/**
+ * @brief Init the backup ram and make it accesible
+ */
+void backup_ram_init();
+
+/**
+ * @brief Disable access to the backup RAM. This saves power
+ */
+void backup_ram_disable();
+
+/**
+ * @brief Whis function overwrites the backup RAM with 0x00
+ */
+void backup_ram_wipe();
+
+/**
+ * @brief Read data from the backup RAM
+ * @param addr Address offset inside memory
+ * @param data read 32bit data
+ */
+int backup_ram_get_data(uint32_t addr, uint32_t *data);
+
+/**
+ * @brief Write data structure to backup RAM
+ * @param data
+ * @return
+ */
+int backup_ram_write_data(uint32_t addr, uint32_t data);
+

stm-firmware/main.c

@@ -26,8 +26,6 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <inttypes.h>
-/* #include <arm_math.h> */
 #include <stm32/stm32f4xx.h>
 #include <cmsis/core_cm4.h>
 #include <setup/system_stm32f4xx.h>

stm-firmware/safety/fault.c

@@ -0,0 +1,49 @@
+/* Reflow Oven Controller
+ *
+ * Copyright (C) 2020  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of the Reflow Oven Controller Project.
+ *
+ * The reflow oven controller is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The Reflow Oven Control Firmware 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 the reflow oven controller project.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <reflow-controller/oven-driver.h>
+#include <reflow-controller/digio.h>
+#include <reflow-controller/safety/fault.h>
+
+void HardFault_Handler(void)
+{
+	/* This is a non recoverable fault. Hang here */
+
+	oven_driver_set_power(0);
+	oven_driver_apply_power_level();
+
+	led_set(0, 1);
+
+	while (1);
+}
+
+void panic_mode(void)
+{
+	/* Panic mode is esentially the same as a hardfault,
+	 * but it can be expected, that more functionality is still usable
+	 */
+
+	oven_driver_set_power(0);
+	oven_driver_apply_power_level();
+
+	/* TODO: implement panic mode */
+
+	while (1);
+}

stm-firmware/stm-periph/backup-ram.c

@@ -0,0 +1,54 @@
+/* Reflow Oven Controller
+ *
+ * Copyright (C) 2020  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of the Reflow Oven Controller Project.
+ *
+ * The reflow oven controller is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The Reflow Oven Control Firmware 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 the reflow oven controller project.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stm-periph/backup-ram.h>
+#include <stm-periph/clock-enable-manager.h>
+#include <stm32/stm32f4xx.h>
+
+void backup_ram_init()
+{
+	rcc_manager_enable_clock(&RCC->APB1ENR, BITMASK_TO_BITNO(RCC_APB1ENR_PWREN));
+
+	/* Enable access to backup RAM register set */
+	PWR->CR |= PWR_CR_DBP;
+
+	/* Enable clock for backup ram interface */
+	rcc_manager_enable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(RCC_AHB1ENR_BKPSRAMEN));
+}
+
+void backup_ram_disable()
+{
+	rcc_manager_disable_clock(&RCC->APB1ENR, BITMASK_TO_BITNO(RCC_APB1ENR_PWREN));
+}
+
+void backup_ram_wipe()
+{
+
+}
+
+int backup_ram_get_data(uint32_t addr, uint32_t *data)
+{
+
+}
+
+int backup_ram_write_data(uint32_t addr, uint32_t data)
+{
+
+}