Merge #19754

19754: boards/atmega8: new board r=benpicco a=hugueslarrive

### Contribution description
Splitted from:
- #19740

### Testing procedure
Tested on atmega8 with:
- #19755

### Issues/PRs references

Dependencies:
- #19753
- #19752
- #19751



Co-authored-by: Hugues Larrive <hlarrive@pm.me>

boards/atmega8/Kconfig

@@ -0,0 +1,25 @@
+# Copyright (c) 2020 HAW Hamburg
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+config BOARD
+    default "atmega8" if BOARD_ATMEGA8
+
+config BOARD_ATMEGA8
+    bool
+    default y
+    select CPU_MODEL_ATMEGA8
+    # Put defined MCU peripherals here (in alphabetical order)
+    select HAS_PERIPH_ADC
+    select HAS_PERIPH_GPIO
+    select HAS_PERIPH_I2C
+    select HAS_PERIPH_PWM
+    select HAS_PERIPH_SPI
+    select HAS_PERIPH_TIMER
+    select HAS_PERIPH_UART
+    # Various other features (if any)
+    select MODULE_BOARDS_COMMON_ATMEGA if TEST_KCONFIG
+
+source "$(RIOTBOARD)/common/atmega/Kconfig"

boards/atmega8/Makefile

@@ -0,0 +1,5 @@
+MODULE = board
+
+DIRS = $(RIOTBOARD)/common/atmega
+
+include $(RIOTBASE)/Makefile.base

boards/atmega8/Makefile.dep

@@ -0,0 +1 @@
+USEMODULE += boards_common_atmega

boards/atmega8/Makefile.features

@@ -0,0 +1,9 @@
+CPU = atmega8
+
+FEATURES_PROVIDED += periph_adc
+FEATURES_PROVIDED += periph_gpio
+FEATURES_PROVIDED += periph_i2c
+FEATURES_PROVIDED += periph_pwm
+FEATURES_PROVIDED += periph_spi
+FEATURES_PROVIDED += periph_timer
+FEATURES_PROVIDED += periph_uart

boards/atmega8/Makefile.include

@@ -0,0 +1,16 @@
+# configure the terminal program
+PORT_LINUX          ?= /dev/ttyUSB0
+PORT_DARWIN         ?= $(firstword $(sort $(wildcard /dev/tty.usbmodem*)))
+BAUD                ?= 9600
+ATMEGA8_CLOCK    	?=
+
+# Allow overwriting programmer via env variables without affecting other boards
+PROGRAMMER_BOARD_ATMEGA8 ?= usbasp
+# ICSP programmer to use for avrdude
+AVRDUDE_PROGRAMMER ?= $(PROGRAMMER_BOARD_ATMEGA8)
+
+ifneq (,$(ATMEGA8_CLOCK))
+  CFLAGS += -DCLOCK_CORECLOCK=$(ATMEGA8_CLOCK)
+endif
+
+include $(RIOTBOARD)/common/atmega/Makefile.include

boards/atmega8/doc.txt

@@ -0,0 +1,99 @@
+/**
+@defgroup    boards_atmega8 Standalone ATmega8
+@ingroup     boards
+@brief       Support for using the ATmega8 as standalone board
+
+## Overview
+
+As the ATmega8 can run from the internal oscillator, placing it on a breadboard,
+connecting an USB-UART adapter and power is enough to run RIOT on it. (An ISP
+programmer will be needed to program it; or to program a bootloader to
+subsequently allow programming via UART.)
+
+### MCU
+| MCU           | ATmega8                                       |
+|:------------- |:--------------------------------------------- |
+| Family        | AVR/ATmega                                    |
+| Vendor        | Microchip (previously Atmel)                  |
+| RAM           | 1KiB                                          |
+| Flash         | 8KiB                                          |
+| EEPROM        | 512B                                          |
+| Frequency     | 1MHz/8MHz (up to 16MHz with external clock)   |
+| Timers        | 3 (2x 8bit, 1x 16bit)                         |
+| ADCs          | 6 analog input pins                           |
+| UARTs         | 1                                             |
+| SPIs          | 1                                             |
+| I2Cs          | 1 (called TWI)                                |
+| Vcc           | 4.5V - 5.5V (ATmega8), 2.7V - 5.5V (ATmega8L) |
+| Datasheet     | [Official datasheet](https://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-2486-8-bit-AVR-microcontroller-ATmega8_L_datasheet.pdf) |
+
+### Pinout
+
+\htmlonly<style>div.image img[src="https://camo.githubusercontent.com/c55beef2f138da61fe671a1e4a307ff4ffbc318d/68747470733a2f2f692e696d6775722e636f6d2f715849456368542e6a7067"]{width:100%;}</style>\endhtmlonly
+@image html "https://camo.githubusercontent.com/c55beef2f138da61fe671a1e4a307ff4ffbc318d/68747470733a2f2f692e696d6775722e636f6d2f715849456368542e6a7067" "Pinout of the ATmega328p"<br>
+
+All credit for above pinout image goes to https://github.com/MCUdude/MiniCore#pinout
+
+### Clock Frequency
+
+The ATmega8 has an internal oscillators clocked at 1MHz that allow it to be
+operated without any external clock source or crystal. By default the fuses are
+configured to use the internal oscillator and an operating mode resulting in a
+clock speed of 1MHz. By setting the `CKSEL` fuses to 0100 the clock will operate
+at 8MHz without an external clock source. This can be done like this:
+
+    avrdude -c usbasp -p m8 -B 32 -U lfuse:w:0xe4:m
+
+(Replace `usbasp` with the ISP programmer you are using. The `-B 32` might
+be needed on some ISP programmers to communicate with slow ATmega MCUs. It will
+not be needed anymore after the clock device has been disabled.)
+
+This "board" is configured to use 8MHz as core clock, so that the ATmega8
+runs at the highest frequency possible without external clock sources.
+
+By setting the environment variable `ATMEGA8_CLOCK` to a custom frequency in
+Hz (e.g. `1000000` for 1MHz), this core clock can be changed easily. Refer to
+the datasheet on how to configure the ATmega8 to use an external crystal, an
+external clock source or the clock divider.
+
+### Relation Between Supply Voltage, Clock Frequency and Power Consumption
+
+A higher supply voltage results in a higher current drawn. Thus, lower power
+consumption can be achieved by using a lower supply voltage. However, higher
+clock frequencies require higher supply voltages for reliable operation.
+
+The lowest possible supply voltage at 8 MHz is 2.7V (Atmega8L) or
+4.5V (Atmega8).
+
+## Flashing the Device
+
+In order to flash the ATmega8 without a bootloader, an ISP programmer is
+needed. Connect the programmer as follows:
+
+| ISP pin  | ATmega8 pin    |
+|:-------- |:-------------- |
+| MISO     | 18/PB4/MISO    |
+| VCC      | 7/VCC          |
+| SCK      | 19/PB5/SCK     |
+| MOSI     | 17/PB3/MOSI    |
+| RESET    | 1/RESET        |
+| Ground   | 22/GND         |
+
+The tool `avrdude` needs to be installed. When using the `usbasp` running
+
+    make BOARD=atmega8 flash
+
+will take care of everything. To use the programmer `<FOOBAR>` instead, run
+
+    make BOARD=atmega8 PROGRAMMER=<FOOBAR> flash
+
+## Serial Terminal
+
+Connect a TTL adapter with pins 2/RXD and 3/TXD an run
+
+    make BOARD=atmega8 term
+
+Please note that the supply voltage should be compatible with the logic level of
+the TTL adapter. Usually everything between 3.3 V and 5 V should work.
+
+ */

boards/atmega8/include/board.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2014 Freie Universität Berlin, Hinnerk van Bruinehsen
+ *               2016 Laurent Navet <laurent.navet@gmail.com>
+ *               2019 Otto-von-Guericke-Universität Magdeburg
+ *               2023 Hugues Larrive
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     boards_atmega8
+ * @{
+ *
+ * @file
+ * @brief       Board specific definitions for the standalone ATmega8 "board"
+ *
+ * @author      Marian Buschsieweke <marian.buschsieweke@ovgu.de>
+ * @author      Hinnerk van Bruinehsen <h.v.bruinehsen@fu-berlin.de>
+ * @author      Laurent Navet <laurent.navet@gmail.com>
+ * @author      Hugues Larrive <hugues.larrive@pm.me>
+ */
+
+#ifndef BOARD_H
+#define BOARD_H
+
+#include "cpu.h"
+#include "periph_conf.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @name    STDIO configuration
+ *
+ * As the CPU is too slow to handle 115200 baud, we set the default
+ * baudrate to 9600 for this board
+ * @{
+ */
+#define STDIO_UART_BAUDRATE (9600U)
+/** @} */
+
+/**
+ * @name    xtimer configuration values
+ * @{
+ */
+#define XTIMER_WIDTH                (16)
+#if CLOCK_CORECLOCK > 4000000UL
+#define XTIMER_HZ                   (CLOCK_CORECLOCK / 64)
+#else
+#define XTIMER_HZ                   (CLOCK_CORECLOCK / 8)
+#endif
+#define XTIMER_BACKOFF              (40)
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BOARD_H */
+/** @} */

boards/atmega8/include/periph_conf.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2019 Otto-von-Guericke-Universität Magdeburg
+ *               2023 Hugues Larrive
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup boards_atmega8
+ * @{
+ *
+ * @file
+ * @brief   Peripheral MCU configuration for the ATmega8 standalone "board"
+ *
+ * @author  Marian Buschsieweke <marian.buschsieweke@ovgu.de>
+ * @author  Hugues Larrive <hugues.larrive@pm.me>
+ */
+
+#ifndef PERIPH_CONF_H
+#define PERIPH_CONF_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @name    Clock configuration
+ * @{
+ */
+#ifndef CLOCK_CORECLOCK
+/* Using 8MHz internal oscillator as default clock source */
+#define CLOCK_CORECLOCK     (8000000UL)
+#endif
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#include "periph_conf_atmega_common.h"
+
+#endif /* PERIPH_CONF_H */
+/** @} */

boards/common/atmega/include/periph_conf_atmega_common.h

@@ -6,6 +6,7 @@
  *               2017 HAW Hamburg, Dimitri Nahm
  *               2018 Matthew Blue <matthew.blue.neuro@gmail.com>
  *               2019 Otto-von-Guericke-Universität Magdeburg
+ *               2023 Hugues Larrive
  *
  * This file is subject to the terms and conditions of the GNU Lesser
  * General Public License v2.1. See the file LICENSE in the top level
@@ -28,6 +29,7 @@
  * @author      Matthew Blue <matthew.blue.neuro@gmail.com>
  * @author      Francisco Acosta <francisco.acosta@inria.fr>
  * @author      Marian Buschsieweke <marian.buschsieweke@ovgu.de>
+ * @author      Hugues Larrive <hugues.larrive@pm.me>
  */
 
 #ifndef PERIPH_CONF_ATMEGA_COMMON_H
@@ -71,6 +73,12 @@ extern "C" {
     #define UART_1              MEGA_UART1
     #define UART_1_ISR          USART1_RX_vect
     #define UART_1_ISR_TX       USART1_TX_vect
+#elif defined(CPU_ATMEGA8)
+    #define UART_NUMOF          (1U)
+
+    #define UART_0              MEGA_UART
+    #define UART_0_ISR          USART_RXC_vect
+    #define UART_0_ISR_TX       USART_TXC_vect
 #elif defined(CPU_ATMEGA328P)
     #define UART_NUMOF          (1U)
 
@@ -156,7 +164,8 @@ extern "C" {
  */
 #ifndef ADC_NUMOF
 #if defined(CPU_ATMEGA128RFA1) || defined(CPU_ATMEGA256RFR2) || defined(CPU_ATMEGA328P) ||  \
-    defined(CPU_ATMEGA1281) || defined(CPU_ATMEGA1284P) || defined(CPU_ATMEGA32U4)
+    defined(CPU_ATMEGA1281) || defined(CPU_ATMEGA1284P) || defined(CPU_ATMEGA32U4) || \
+    defined(CPU_ATMEGA8)
     #define ADC_NUMOF           (8U)
 #elif defined (CPU_ATMEGA2560)
     #define ADC_NUMOF           (16U)
@@ -180,7 +189,9 @@ extern "C" {
  * @{
  */
 #ifndef PWM_NUMOF
-#if defined(CPU_ATMEGA328P)
+#if defined(CPU_ATMEGA8)
+    #define PWM_PINS_CH0 { GPIO_PIN(PORT_B, 3), GPIO_UNDEF }
+#elif defined(CPU_ATMEGA328P)
     #define PWM_PINS_CH0 { GPIO_PIN(PORT_D, 6), GPIO_PIN(PORT_D, 5) }
     #define PWM_PINS_CH1 { GPIO_PIN(PORT_B, 3), GPIO_PIN(PORT_D, 3) }
 #elif defined(CPU_ATMEGA1281)
@@ -200,8 +211,9 @@ extern "C" {
 
 #if defined(CPU_ATMEGA32U4) || defined(CPU_ATMEGA328P) || \
     defined(CPU_ATMEGA1281) || defined(CPU_ATMEGA1284P) || \
-    defined(CPU_ATMEGA2560)
+    defined(CPU_ATMEGA2560) || defined(CPU_ATMEGA8)
     static const pwm_conf_t pwm_conf[] = {
+#ifndef CPU_ATMEGA8
         {
             .dev = MINI_TIMER0,
             .pin_ch = PWM_PINS_CH0,
@@ -213,6 +225,13 @@ extern "C" {
             .pin_ch = PWM_PINS_CH1,
             .div = MINI_TIMER2_DIV,
         }
+#endif
+#else /* CPU_ATMEGA8 */
+        {
+            .dev = MINI_TIMER2,
+            .pin_ch = PWM_PINS_CH0,
+            .div = MINI_TIMER2_DIV,
+        },
 #endif
     };
 

cpu/atmega8/Kconfig

@@ -19,7 +19,7 @@ config CPU_MODEL_ATMEGA8
 config HAS_CPU_ATMEGA8
     bool
     help
-        Indicates that a 'atmega8' cpu is being used.
+        Indicates that an 'atmega8' cpu is being used.
 
 ## Common CPU symbols
 config CPU_FAM

cpu/atmega8/Makefile.features

@@ -1 +1,3 @@
+CPU_FAM = atmega8
+
 include $(RIOTCPU)/atmega_common/Makefile.features

cpu/atmega_common/Kconfig

@@ -14,8 +14,8 @@ config CPU_COMMON_ATMEGA
     bool
     select HAS_CPU_CORE_ATMEGA
     select HAS_ATMEGA_PCINT0
-    select HAS_DBGPIN
-    select HAS_PERIPH_CPUID
+    select HAS_DBGPIN if !CPU_FAM_ATMEGA8
+    select HAS_PERIPH_CPUID if !CPU_FAM_ATMEGA8
     select HAS_PERIPH_EEPROM
     select HAS_PERIPH_GPIO
     select HAS_PERIPH_GPIO_IRQ

cpu/atmega_common/Makefile.features

@@ -5,8 +5,6 @@ include $(RIOTCPU)/avr8_common/Makefile.features
 
 FEATURES_PROVIDED += cpu_core_atmega
 FEATURES_PROVIDED += atmega_pcint0
-FEATURES_PROVIDED += dbgpin
-FEATURES_PROVIDED += periph_cpuid
 FEATURES_PROVIDED += periph_eeprom
 FEATURES_PROVIDED += periph_gpio periph_gpio_irq
 FEATURES_PROVIDED += periph_gpio_ll
@@ -20,6 +18,10 @@ FEATURES_PROVIDED += periph_timer_periodic
 FEATURES_PROVIDED += periph_rtt_overflow
 FEATURES_PROVIDED += periph_wdt
 FEATURES_PROVIDED += puf_sram
+ifneq (atmega8, $(CPU_FAM))
+FEATURES_PROVIDED += dbgpin
+FEATURES_PROVIDED += periph_cpuid
+endif
 
 FEATURES_CONFLICT += periph_rtc:periph_rtt
 FEATURES_CONFLICT_MSG += "On ATmega, the RTC and RTT use to the same hardware timer."

cpu/atmega_common/periph/eeprom.c

@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2018 Inria
+ *               2023 Hugues Larrive
  *
  * This file is subject to the terms and conditions of the GNU Lesser
  * General Public License v2.1. See the file LICENSE in the top level
@@ -15,6 +16,7 @@
  * @brief       Low-level EEPROM driver implementation for ATmega family
  *
  * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ * @author      Hugues Larrive <hugues.larrive@pm.me>
  * @}
  */
 
@@ -35,7 +37,11 @@ size_t eeprom_read(uint32_t pos, void *data, size_t len)
 
     DEBUG("Reading data from EEPROM at pos %" PRIu32 ": ", pos);
     for (size_t i = 0; i < len; i++) {
+#ifdef EEPE
         while (EECR & (1 << EEPE)) {}
+#elif defined(EEWE)
+        while (EECR & (1 << EEWE)) {}
+#endif
 
         /* Set up address register */
         EEAR = pos++;
@@ -58,17 +64,30 @@ size_t eeprom_write(uint32_t pos, const void *data, size_t len)
 
     for (size_t i = 0; i < len; i++) {
         /* Wait for completion of previous operation */
+#ifdef EEPE
         while (EECR & (1 << EEPE)) {}
+#elif defined(EEWE)
+        while (EECR & (1 << EEWE)) {}
+#endif
 
         /* Set up address and Data Registers */
         EEAR = pos++;
         EEDR = *p++;
 
+#ifdef EEMPE
         /* Write logical one to EEMPE */
         EECR |= (1 << EEMPE);
-
+#elif defined(EEMWE)
+        /* Write logical one to EEMWE */
+        EECR |= (1 << EEMWE);
+#endif
+#ifdef EEPE
         /* Start eeprom write by setting EEPE */
         EECR |= (1 << EEPE);
+#elif defined(EEWE)
+        /* Start eeprom write by setting EEWE */
+        EECR |= (1 << EEWE);
+#endif
     }
 
     return len;

cpu/atmega_common/periph/gpio_ll_irq.c

@@ -3,6 +3,7 @@
  *               2016 INRIA
  *               2022 Otto-von-Guericke-Universität Magdeburg
  *               2023 Gerson Fernando Budke
+ *               2023 Hugues Larrive
  *
  * This file is subject to the terms and conditions of the GNU Lesser General
  * Public License v2.1. See the file LICENSE in the top level directory for more
@@ -24,6 +25,7 @@
  * @author      Torben Petersen <petersen@ibr.cs.tu-bs.de>
  * @author      Marian Buschsieweke <marian.buschsieweke@ovgu.de>
  * @author      Gerson Fernando Budke <nandojve@gmail.com>
+ * @author      Hugues Larrive <hugues.larrive@pm.me>
  *
  * @}
  */
@@ -49,32 +51,54 @@ static struct isr_ctx isr_ctx[GPIO_EXT_INT_NUMOF];
 
 static void clear_pending_irqs(uint8_t exti)
 {
+#if defined(EIFR)
     EIFR |= 1 << exti;
+#elif defined(GIFR)
+    GIFR |= 1 << (INTF0 + exti);
+#else
+#  error "No support for AVR with neither EIFR nor GIFR"
+#endif
 }
 
 void gpio_ll_irq_mask(gpio_port_t port, uint8_t pin)
 {
     uint8_t exti = atmega_pin2exti(GPIO_PORT_NUM(port), pin);
+#if defined(EIMSK)
     EIMSK &= ~(1 << exti);
+#elif defined(GICR)
+    GICR &= ~(1 << (INT0 + exti));
+#endif
 }
 
 void gpio_ll_irq_unmask(gpio_port_t port, uint8_t pin)
 {
     uint8_t exti = atmega_pin2exti(GPIO_PORT_NUM(port), pin);
+#if defined(EIMSK)
     EIMSK |= 1 << exti;
+#elif defined(GICR)
+    GICR |= 1 << (INT0 + exti);
+#endif
 }
 
 void gpio_ll_irq_unmask_and_clear(gpio_port_t port, uint8_t pin)
 {
     uint8_t exti = atmega_pin2exti(GPIO_PORT_NUM(port), pin);
     clear_pending_irqs(exti);
+#if defined(EIMSK)
     EIMSK |= 1 << exti;
+#elif defined(GICR)
+    GICR |= 1 << (INT0 + exti);
+#endif
 }
 
 static void set_trigger(uint8_t exti, gpio_irq_trig_t trig)
 {
     exti <<= 1;
+#if defined(EICRA)
     volatile uint8_t *eicr = &EICRA;
+#elif defined(MCUCR)
+    volatile uint8_t *eicr = &MCUCR;
+#endif
 
 #ifdef EICRB
     if (exti >= 8) {
@@ -110,7 +134,11 @@ int gpio_ll_irq(gpio_port_t port, uint8_t pin, gpio_irq_trig_t trig,
     /* setup IRQ */
     set_trigger(exti, trig);
     clear_pending_irqs(exti);
+#if defined(EIMSK)
     EIMSK |= 1 << exti;
+#elif defined(GICR)
+    GICR |= 1 << (INT0 + exti);
+#endif
 
     irq_restore(irq_state);
 

cpu/atmega_common/periph/wdt.c

@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2019 Inria
+ *               2023 Hugues Larrive
  *
  * This file is subject to the terms and conditions of the GNU Lesser
  * General Public License v2.1. See the file LICENSE in the top level
@@ -15,6 +16,7 @@
  * @brief       Implementation of the watchdog peripheral interface
  *
  * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ * @author      Hugues Larrive <hugues.larrive@pm.me>
  *
  * @}
  */
@@ -66,13 +68,18 @@ void wdt_setup_reboot(uint32_t min_time, uint32_t max_time)
     /* disable watchdog */
     wdt_disable();
 
+    /* WDTO_8S and WDTO_4S are only available on some devices, we will
+     * test on WDP3 as in avr/wdt.h */
+#ifdef WDP3
     if (max_time >= 8000) {
         wdt_prescaler = WDTO_8S;
     }
     else if (max_time >= 4000) {
         wdt_prescaler = WDTO_4S;
     }
-    else if (max_time >= 2000) {
+    else
+#endif
+    if (max_time >= 2000) {
         wdt_prescaler = WDTO_2S;
     }
     else if (max_time >= 1000) {

examples/asymcute_mqttsn/Makefile.ci

@@ -8,6 +8,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     atmega1284p \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     bluepill-stm32f030c8 \
     calliope-mini \

examples/benchmark_udp/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     bluepill-stm32f030c8 \
     derfmega128 \

examples/blinky/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

examples/cord_ep/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     bluepill-stm32f030c8 \
     derfmega128 \

examples/cord_epsim/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     bluepill-stm32f030c8 \
     hifive1 \
     hifive1b \

examples/cord_lc/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     bluepill-stm32f030c8 \
     chronos \

examples/default/Makefile.ci

@@ -1,3 +1,4 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-l011k4 \
     #

examples/dtls-echo/Makefile.ci

@@ -8,6 +8,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     atmega1284p \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     blackpill-stm32f103c8 \
     blackpill-stm32f103cb \

examples/emcute_mqttsn/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     bluepill-stm32f030c8 \
     derfmega128 \

examples/filesystem/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-l011k4 \
     samd10-xmini \
     stm32f030f4-demo \

examples/gcoap/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     bluepill-stm32f030c8 \
     derfmega128 \

examples/gcoap_block_server/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     bluepill-stm32f030c8 \
     derfmega128 \

examples/gcoap_dtls/Makefile.ci

@@ -8,6 +8,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     atmega1284p \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a1-xplained \
     atxmega-a1u-xpro \
     atxmega-a3bu-xplained \

examples/gcoap_fileserver/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     blackpill-stm32f103c8 \
     bluepill-stm32f030c8 \

examples/gnrc_border_router/Makefile.ci

@@ -8,6 +8,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     atmega1284p \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     b-l072z-lrwan1 \
     blackpill-stm32f103c8 \

examples/gnrc_lorawan/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     msb-430 \
     msb-430h \
     nucleo-f031k6 \

examples/gnrc_minimal/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     samd10-xmini \

examples/gnrc_networking/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     blackpill-stm32f103c8 \
     bluepill-stm32f030c8 \

examples/gnrc_networking_subnets/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     bluepill-stm32f030c8 \
     derfmega128 \

examples/lorawan/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-f042k6 \
     nucleo-l011k4 \

examples/nanocoap_server/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     bluepill-stm32f030c8 \
     i-nucleo-lrwan1 \
     msb-430 \

examples/paho-mqtt/Makefile.ci

@@ -8,6 +8,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     atmega1284p \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     blackpill-stm32f103c8 \
     blackpill-stm32f103cb \

examples/posix_select/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     bluepill-stm32f030c8 \
     chronos \
     i-nucleo-lrwan1 \

examples/posix_sockets/Makefile.ci

@@ -7,6 +7,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     bluepill-stm32f030c8 \
     derfmega128 \

examples/saul/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

examples/senml_saul/Makefile.ci

@@ -5,5 +5,6 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-l011k4 \
     #

examples/sniffer/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     bluepill-stm32f030c8 \
     i-nucleo-lrwan1 \
     nucleo-f030r8 \

examples/spectrum-scanner/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     bluepill-stm32f030c8 \
     i-nucleo-lrwan1 \
     nucleo-f030r8 \

examples/telnet_server/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     atxmega-a3bu-xplained \
     bluepill-stm32f030c8 \
     derfmega128 \

examples/thread_duel/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     samd10-xmini \

examples/timer_periodic_wakeup/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

pkg/qdsa/Makefile

@@ -1,6 +1,6 @@
 PKG_NAME=qdsa
 PKG_URL=https://github.com/RIOT-OS/qdsa.git
-PKG_VERSION=4cb3f1a140f25e18ed288fd484defe3d45bdf166
+PKG_VERSION=3fa25ffa3971000fe4a3e3b42340c40c8d79f2a2
 PKG_LICENSE=PD
 
 include $(RIOTBASE)/pkg/pkg.mk

tests/bench/msg_pingpong/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     stm32f030f4-demo \

tests/bench/mutex_pingpong/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     stm32f030f4-demo \

tests/bench/periph_gpio_ll/Makefile.ci

@@ -1,3 +1,4 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-l011k4 \
     #

tests/bench/runtime_coreapis/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/bench/sched_nop/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/bench/sys_atomic_utils/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-l011k4 \
     samd10-xmini \
     stm32f030f4-demo \

tests/bench/sys_base64/Makefile.ci

@@ -1,3 +1,4 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-l011k4 \
     #

tests/bench/thread_flags_pingpong/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     stm32f030f4-demo \

tests/bench/thread_yield_pingpong/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     stm32f030f4-demo \

tests/bench/timers/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-l011k4 \
     samd10-xmini \
     stk3200 \

tests/bench/xtimer/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     bluepill-stm32f030c8 \
     im880b \
     nucleo-l011k4 \

tests/bench/xtimer_load/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-f042k6 \
     nucleo-l011k4 \

tests/bench/ztimer/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     bluepill-stm32f030c8 \
     im880b \
     nucleo-l011k4 \

tests/core/bitarithm_timings/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/core/cond_order/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     bluepill-stm32f030c8 \
     i-nucleo-lrwan1 \
     nucleo-f030 \

tests/core/irq/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     stm32f030f4-demo \

tests/core/irq_disable_restore/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/core/isr_yield_higher/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     stm32f030f4-demo \

tests/core/msg_queue_capacity/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/core/mutex_cancel/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/core/mutex_order/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     bluepill-stm32f030c8 \
     i-nucleo-lrwan1 \
     nucleo-f030r8 \

tests/core/rmutex/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-f042k6 \
     nucleo-l011k4 \

tests/core/rmutex_cpp/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     bluepill-stm32f030c8 \
     i-nucleo-lrwan1 \
     nucleo-f030r8 \

tests/core/sched_change_priority/Makefile.ci

@@ -4,5 +4,6 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-l011k4 \
     #

tests/core/thread_cooperation/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     bluepill-stm32f030c8 \
     i-nucleo-lrwan1 \
     msb-430 \

tests/core/thread_exit/Makefile.ci

@@ -4,6 +4,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     samd10-xmini \

tests/core/thread_flags/Makefile.ci

@@ -4,6 +4,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     stm32f030f4-demo \

tests/core/thread_flags_xtimer/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/core/thread_float/Makefile.ci

@@ -6,6 +6,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     calliope-mini \
     cc2650stk \
     maple-mini \

tests/core/thread_msg/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-f042k6 \
     nucleo-l011k4 \

tests/core/thread_msg_block_race/Makefile.ci

@@ -4,6 +4,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     #

tests/core/thread_msg_bus/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-f042k6 \
     nucleo-l011k4 \

tests/core/thread_msg_seq/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-f042k6 \
     nucleo-l011k4 \

tests/core/thread_stack_alignment/Makefile.ci

@@ -4,6 +4,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     samd10-xmini \

tests/core/thread_zombie/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     samd10-xmini \

tests/drivers/ad7746/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/drivers/adcxx1c/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/drivers/ads101x/Makefile.ci

@@ -1,3 +1,4 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-l011k4 \
     #

tests/drivers/adt7310/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     stm32f030f4-demo \
     zigduino \
     #

tests/drivers/adxl345/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/drivers/aip31068/Makefile.ci

@@ -6,4 +6,5 @@ BOARD_INSUFFICIENT_MEMORY := \
     atmega328p \
     atmega328p-xplained-mini \
     atmega32u4 \
+    atmega8 \
     #

tests/drivers/apa102/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-l011k4 \
     stm32f030f4-demo \
     #

tests/drivers/apds99xx/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/drivers/apds99xx_full/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/drivers/at/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-l011k4 \
     samd10-xmini \

tests/drivers/at24cxxx/Makefile.ci

@@ -1,2 +1,3 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     #

tests/drivers/at24mac/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/drivers/at25xxx/Makefile.ci

@@ -0,0 +1,3 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
+    #

tests/drivers/at30tse75x/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-l011k4 \
     samd10-xmini \
     #

tests/drivers/at86rf215/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-f031k6 \
     nucleo-f042k6 \
     nucleo-l011k4 \

tests/drivers/at86rf2xx/Makefile.ci

@@ -5,6 +5,7 @@ BOARD_INSUFFICIENT_MEMORY := \
     arduino-uno \
     atmega328p \
     atmega328p-xplained-mini \
+    atmega8 \
     nucleo-l011k4 \
     samd10-xmini \
     stm32f030f4-demo \

tests/drivers/at86rf2xx_aes/Makefile.ci

@@ -1,4 +1,5 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    atmega8 \
     nucleo-l011k4 \
     samd10-xmini \
     stm32f030f4-demo \