hw/avr/arduino.c | 36 ++++++++++++++ hw/avr/atmega.c | 122 +++++++++++++++++++++++++++++++++++++++++++++++ hw/avr/atmega.h | 2 + 3 files changed, 160 insertions(+)
From: rmsyn <rmsynchls@gmail.com>
Adds support for ATmega16u4 and ATmega32u4 MCU definitions.
Defines interrupts, memory layout, and machine types for generic
ATmega16u4 and ATmega32u4 MCUs.
Signed-off-by: rmsyn <rmsynchls@gmail.com>
---
hw/avr/arduino.c | 36 ++++++++++++++
hw/avr/atmega.c | 122 +++++++++++++++++++++++++++++++++++++++++++++++
hw/avr/atmega.h | 2 +
3 files changed, 160 insertions(+)
diff --git a/hw/avr/arduino.c b/hw/avr/arduino.c
index 48ef478346..be04e412e6 100644
--- a/hw/avr/arduino.c
+++ b/hw/avr/arduino.c
@@ -129,6 +129,34 @@ static void arduino_mega2560_class_init(ObjectClass *oc, void *data)
amc->xtal_hz = 16 * 1000 * 1000; /* CSTCE16M0V53-R0 */
};
+static void arduino_mega16u4_class_init(ObjectClass *oc, void *data)
+{
+ MachineClass *mc = MACHINE_CLASS(oc);
+ ArduinoMachineClass *amc = ARDUINO_MACHINE_CLASS(oc);
+
+ /*
+ * https://ww1.microchip.com/downloads/en/devicedoc/atmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf
+ */
+ mc->desc = "Arduino Mega 16u4 (ATmega16u4)";
+ mc->alias = "mega16u4";
+ amc->mcu_type = TYPE_ATMEGA16U4_MCU;
+ amc->xtal_hz = 16 * 1000 * 1000; /* CSTCE16M0V53-R0 */
+};
+
+static void arduino_mega32u4_class_init(ObjectClass *oc, void *data)
+{
+ MachineClass *mc = MACHINE_CLASS(oc);
+ ArduinoMachineClass *amc = ARDUINO_MACHINE_CLASS(oc);
+
+ /*
+ * https://ww1.microchip.com/downloads/en/devicedoc/atmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf
+ */
+ mc->desc = "Arduino Mega 32u4 (ATmega32u4)";
+ mc->alias = "mega32u4";
+ amc->mcu_type = TYPE_ATMEGA32U4_MCU;
+ amc->xtal_hz = 16 * 1000 * 1000; /* CSTCE16M0V53-R0 */
+};
+
static const TypeInfo arduino_machine_types[] = {
{
.name = MACHINE_TYPE_NAME("arduino-duemilanove"),
@@ -146,6 +174,14 @@ static const TypeInfo arduino_machine_types[] = {
.name = MACHINE_TYPE_NAME("arduino-mega-2560-v3"),
.parent = TYPE_ARDUINO_MACHINE,
.class_init = arduino_mega2560_class_init,
+ }, {
+ .name = MACHINE_TYPE_NAME("arduino-mega-16u4"),
+ .parent = TYPE_ARDUINO_MACHINE,
+ .class_init = arduino_mega16u4_class_init,
+ }, {
+ .name = MACHINE_TYPE_NAME("arduino-mega-32u4"),
+ .parent = TYPE_ARDUINO_MACHINE,
+ .class_init = arduino_mega32u4_class_init,
}, {
.name = TYPE_ARDUINO_MACHINE,
.parent = TYPE_MACHINE,
diff --git a/hw/avr/atmega.c b/hw/avr/atmega.c
index a34803e642..292ad9a447 100644
--- a/hw/avr/atmega.c
+++ b/hw/avr/atmega.c
@@ -27,6 +27,17 @@ enum AtmegaPeripheral {
GPIOG, GPIOH, GPIOI, GPIOJ, GPIOK, GPIOL,
USART0, USART1, USART2, USART3,
TIMER0, TIMER1, TIMER2, TIMER3, TIMER4, TIMER5,
+ RESET,
+ INT0, INT1, INT2, INT3, INT4, INT5, INT6,
+ PCINT0,
+ USB_GEN, USB_EP,
+ WDT,
+ SPI,
+ ANALOG_COMP,
+ ADC,
+ EE_READY,
+ TWI,
+ SPM_READY,
PERIFMAX
};
@@ -98,6 +109,30 @@ static const peripheral_cfg dev168_328[PERIFMAX] = {
[GPIOC] = { 0x26 },
[GPIOB] = { 0x23 },
[GPIOA] = { 0x20 },
+}, dev16u4_32u4[PERIFMAX] = {
+ [POWER1] = { 0x65 },
+ [POWER0] = { 0x64 },
+ [TIMER4] = { 0x4c, POWER1, 4, 0x72, 0x39, true },
+ [SPM_READY] = { 0x4a },
+ [TWI] = { 0x48 },
+ [TIMER3] = { 0x3e, POWER1, 3, 0x71, 0x38, true },
+ [EE_READY] = { 0x3c },
+ [ADC] = { 0x3a },
+ [ANALOG_COMP] = { 0x38 },
+ [USART1] = { 0x32, POWER1, 0 },
+ [SPI] = { 0x30 },
+ [TIMER0] = { 0x2a, POWER0, 5, 0x6e, 0x35, true },
+ [TIMER1] = { 0x20, POWER0, 3, 0x6f, 0x36, true },
+ [WDT] = { 0x18 },
+ [USB_GEN] = { 0x14 },
+ [USB_EP] = { 0x16 },
+ [PCINT0] = { 0x12 },
+ [INT6] = { 0x0e },
+ [INT3] = { 0x08 },
+ [INT2] = { 0x06 },
+ [INT1] = { 0x04 },
+ [INT0] = { 0x02 },
+ [RESET] = { 0x00 },
};
enum AtmegaIrq {
@@ -117,6 +152,17 @@ enum AtmegaIrq {
TIMER4_COMPC_IRQ, TIMER4_OVF_IRQ,
TIMER5_CAPT_IRQ, TIMER5_COMPA_IRQ, TIMER5_COMPB_IRQ,
TIMER5_COMPC_IRQ, TIMER5_OVF_IRQ,
+ RESET_IRQ,
+ INT0_IRQ, INT1_IRQ, INT2_IRQ, INT3_IRQ, INT4_IRQ, INT5_IRQ, INT6_IRQ,
+ PCINT0_IRQ,
+ USB_GEN_IRQ, USB_EP_IRQ,
+ WDT_IRQ,
+ SPI_IRQ,
+ ANALOG_COMP_IRQ,
+ ADC_IRQ,
+ EE_READY_IRQ,
+ TWI_IRQ,
+ SPM_READY_IRQ,
IRQ_COUNT
};
@@ -184,6 +230,44 @@ static const uint8_t irq168_328[IRQ_COUNT] = {
[USART3_RXC_IRQ] = 55,
[USART3_DRE_IRQ] = 56,
[USART3_TXC_IRQ] = 57,
+}, irq16u4_32u4[IRQ_COUNT] = {
+ [RESET_IRQ] = 1,
+ [INT0_IRQ] = 2,
+ [INT1_IRQ] = 3,
+ [INT2_IRQ] = 4,
+ [INT3_IRQ] = 5,
+ [INT6_IRQ] = 8,
+ [PCINT0_IRQ] = 10,
+ [USB_GEN_IRQ] = 11,
+ [USB_EP_IRQ] = 12,
+ [WDT_IRQ] = 13,
+ [TIMER1_CAPT_IRQ] = 17,
+ [TIMER1_COMPA_IRQ] = 18,
+ [TIMER1_COMPB_IRQ] = 19,
+ [TIMER1_COMPC_IRQ] = 20,
+ [TIMER1_OVF_IRQ] = 21,
+ [TIMER0_COMPA_IRQ] = 22,
+ [TIMER0_COMPB_IRQ] = 23,
+ [TIMER0_OVF_IRQ] = 24,
+ [SPI_IRQ] = 25,
+ [USART0_RXC_IRQ] = 26,
+ [USART0_DRE_IRQ] = 27,
+ [USART0_TXC_IRQ] = 28,
+ [ANALOG_COMP] = 29,
+ [ADC_IRQ] = 30,
+ [EE_READY_IRQ] = 31,
+ [TIMER3_CAPT_IRQ] = 32,
+ [TIMER3_COMPA_IRQ] = 33,
+ [TIMER3_COMPB_IRQ] = 34,
+ [TIMER3_COMPC_IRQ] = 35,
+ [TIMER3_OVF_IRQ] = 36,
+ [TWI_IRQ] = 37,
+ [SPM_READY_IRQ] = 38,
+ [TIMER4_COMPA_IRQ] = 39,
+ [TIMER4_COMPB_IRQ] = 40,
+ [TIMER4_COMPC_IRQ] = 41,
+ [TIMER4_OVF_IRQ] = 42,
+ /*[TIMER4_FPF_IRQ] = 43,*/
};
static void connect_peripheral_irq(const AtmegaMcuClass *k,
@@ -427,6 +511,36 @@ static void atmega2560_class_init(ObjectClass *oc, void *data)
amc->dev = dev1280_2560;
};
+static void atmega16u4_class_init(ObjectClass *oc, void *data)
+{
+ AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
+
+ amc->cpu_type = AVR_CPU_TYPE_NAME("avr5");
+ amc->flash_size = 16 * KiB;
+ amc->eeprom_size = 512;
+ amc->sram_size = KiB + 256;
+ amc->io_size = 64;
+ amc->gpio_count = 32;
+ amc->adc_count = 12;
+ amc->irq = irq16u4_32u4;
+ amc->dev = dev16u4_32u4;
+};
+
+static void atmega32u4_class_init(ObjectClass *oc, void *data)
+{
+ AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
+
+ amc->cpu_type = AVR_CPU_TYPE_NAME("avr5");
+ amc->flash_size = 32 * KiB;
+ amc->eeprom_size = KiB;
+ amc->sram_size = 2 * KiB + 512;
+ amc->io_size = 64;
+ amc->gpio_count = 32;
+ amc->adc_count = 12;
+ amc->irq = irq16u4_32u4;
+ amc->dev = dev16u4_32u4;
+};
+
static const TypeInfo atmega_mcu_types[] = {
{
.name = TYPE_ATMEGA168_MCU,
@@ -444,6 +558,14 @@ static const TypeInfo atmega_mcu_types[] = {
.name = TYPE_ATMEGA2560_MCU,
.parent = TYPE_ATMEGA_MCU,
.class_init = atmega2560_class_init,
+ }, {
+ .name = TYPE_ATMEGA16U4_MCU,
+ .parent = TYPE_ATMEGA_MCU,
+ .class_init = atmega16u4_class_init,
+ }, {
+ .name = TYPE_ATMEGA32U4_MCU,
+ .parent = TYPE_ATMEGA_MCU,
+ .class_init = atmega32u4_class_init,
}, {
.name = TYPE_ATMEGA_MCU,
.parent = TYPE_SYS_BUS_DEVICE,
diff --git a/hw/avr/atmega.h b/hw/avr/atmega.h
index a99ee15c7e..37d36b9b69 100644
--- a/hw/avr/atmega.h
+++ b/hw/avr/atmega.h
@@ -22,6 +22,8 @@
#define TYPE_ATMEGA328_MCU "ATmega328"
#define TYPE_ATMEGA1280_MCU "ATmega1280"
#define TYPE_ATMEGA2560_MCU "ATmega2560"
+#define TYPE_ATMEGA16U4_MCU "ATmega16U4"
+#define TYPE_ATMEGA32U4_MCU "ATmega32U4"
typedef struct AtmegaMcuState AtmegaMcuState;
DECLARE_INSTANCE_CHECKER(AtmegaMcuState, ATMEGA_MCU,
--
2.38.4Reviewed-by: Michael Rolnik <mrolnik@gmail.com>
On Sun, May 14, 2023 at 12:54 AM ~rmsyn <rmsyn@git.sr.ht> wrote:
> From: rmsyn <rmsynchls@gmail.com>
>
> Adds support for ATmega16u4 and ATmega32u4 MCU definitions.
>
> Defines interrupts, memory layout, and machine types for generic
> ATmega16u4 and ATmega32u4 MCUs.
>
> Signed-off-by: rmsyn <rmsynchls@gmail.com>
> ---
> hw/avr/arduino.c | 36 ++++++++++++++
> hw/avr/atmega.c | 122 +++++++++++++++++++++++++++++++++++++++++++++++
> hw/avr/atmega.h | 2 +
> 3 files changed, 160 insertions(+)
>
> diff --git a/hw/avr/arduino.c b/hw/avr/arduino.c
> index 48ef478346..be04e412e6 100644
> --- a/hw/avr/arduino.c
> +++ b/hw/avr/arduino.c
> @@ -129,6 +129,34 @@ static void arduino_mega2560_class_init(ObjectClass
> *oc, void *data)
> amc->xtal_hz = 16 * 1000 * 1000; /* CSTCE16M0V53-R0 */
> };
>
> +static void arduino_mega16u4_class_init(ObjectClass *oc, void *data)
> +{
> + MachineClass *mc = MACHINE_CLASS(oc);
> + ArduinoMachineClass *amc = ARDUINO_MACHINE_CLASS(oc);
> +
> + /*
> + *
> https://ww1.microchip.com/downloads/en/devicedoc/atmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf
> + */
> + mc->desc = "Arduino Mega 16u4 (ATmega16u4)";
> + mc->alias = "mega16u4";
> + amc->mcu_type = TYPE_ATMEGA16U4_MCU;
> + amc->xtal_hz = 16 * 1000 * 1000; /* CSTCE16M0V53-R0 */
> +};
> +
> +static void arduino_mega32u4_class_init(ObjectClass *oc, void *data)
> +{
> + MachineClass *mc = MACHINE_CLASS(oc);
> + ArduinoMachineClass *amc = ARDUINO_MACHINE_CLASS(oc);
> +
> + /*
> + *
> https://ww1.microchip.com/downloads/en/devicedoc/atmel-7766-8-bit-avr-atmega16u4-32u4_datasheet.pdf
> + */
> + mc->desc = "Arduino Mega 32u4 (ATmega32u4)";
> + mc->alias = "mega32u4";
> + amc->mcu_type = TYPE_ATMEGA32U4_MCU;
> + amc->xtal_hz = 16 * 1000 * 1000; /* CSTCE16M0V53-R0 */
> +};
> +
> static const TypeInfo arduino_machine_types[] = {
> {
> .name = MACHINE_TYPE_NAME("arduino-duemilanove"),
> @@ -146,6 +174,14 @@ static const TypeInfo arduino_machine_types[] = {
> .name = MACHINE_TYPE_NAME("arduino-mega-2560-v3"),
> .parent = TYPE_ARDUINO_MACHINE,
> .class_init = arduino_mega2560_class_init,
> + }, {
> + .name = MACHINE_TYPE_NAME("arduino-mega-16u4"),
> + .parent = TYPE_ARDUINO_MACHINE,
> + .class_init = arduino_mega16u4_class_init,
> + }, {
> + .name = MACHINE_TYPE_NAME("arduino-mega-32u4"),
> + .parent = TYPE_ARDUINO_MACHINE,
> + .class_init = arduino_mega32u4_class_init,
> }, {
> .name = TYPE_ARDUINO_MACHINE,
> .parent = TYPE_MACHINE,
> diff --git a/hw/avr/atmega.c b/hw/avr/atmega.c
> index a34803e642..292ad9a447 100644
> --- a/hw/avr/atmega.c
> +++ b/hw/avr/atmega.c
> @@ -27,6 +27,17 @@ enum AtmegaPeripheral {
> GPIOG, GPIOH, GPIOI, GPIOJ, GPIOK, GPIOL,
> USART0, USART1, USART2, USART3,
> TIMER0, TIMER1, TIMER2, TIMER3, TIMER4, TIMER5,
> + RESET,
> + INT0, INT1, INT2, INT3, INT4, INT5, INT6,
> + PCINT0,
> + USB_GEN, USB_EP,
> + WDT,
> + SPI,
> + ANALOG_COMP,
> + ADC,
> + EE_READY,
> + TWI,
> + SPM_READY,
> PERIFMAX
> };
>
> @@ -98,6 +109,30 @@ static const peripheral_cfg dev168_328[PERIFMAX] = {
> [GPIOC] = { 0x26 },
> [GPIOB] = { 0x23 },
> [GPIOA] = { 0x20 },
> +}, dev16u4_32u4[PERIFMAX] = {
> + [POWER1] = { 0x65 },
> + [POWER0] = { 0x64 },
> + [TIMER4] = { 0x4c, POWER1, 4, 0x72, 0x39, true },
> + [SPM_READY] = { 0x4a },
> + [TWI] = { 0x48 },
> + [TIMER3] = { 0x3e, POWER1, 3, 0x71, 0x38, true },
> + [EE_READY] = { 0x3c },
> + [ADC] = { 0x3a },
> + [ANALOG_COMP] = { 0x38 },
> + [USART1] = { 0x32, POWER1, 0 },
> + [SPI] = { 0x30 },
> + [TIMER0] = { 0x2a, POWER0, 5, 0x6e, 0x35, true },
> + [TIMER1] = { 0x20, POWER0, 3, 0x6f, 0x36, true },
> + [WDT] = { 0x18 },
> + [USB_GEN] = { 0x14 },
> + [USB_EP] = { 0x16 },
> + [PCINT0] = { 0x12 },
> + [INT6] = { 0x0e },
> + [INT3] = { 0x08 },
> + [INT2] = { 0x06 },
> + [INT1] = { 0x04 },
> + [INT0] = { 0x02 },
> + [RESET] = { 0x00 },
> };
>
> enum AtmegaIrq {
> @@ -117,6 +152,17 @@ enum AtmegaIrq {
> TIMER4_COMPC_IRQ, TIMER4_OVF_IRQ,
> TIMER5_CAPT_IRQ, TIMER5_COMPA_IRQ, TIMER5_COMPB_IRQ,
> TIMER5_COMPC_IRQ, TIMER5_OVF_IRQ,
> + RESET_IRQ,
> + INT0_IRQ, INT1_IRQ, INT2_IRQ, INT3_IRQ, INT4_IRQ, INT5_IRQ, INT6_IRQ,
> + PCINT0_IRQ,
> + USB_GEN_IRQ, USB_EP_IRQ,
> + WDT_IRQ,
> + SPI_IRQ,
> + ANALOG_COMP_IRQ,
> + ADC_IRQ,
> + EE_READY_IRQ,
> + TWI_IRQ,
> + SPM_READY_IRQ,
> IRQ_COUNT
> };
>
> @@ -184,6 +230,44 @@ static const uint8_t irq168_328[IRQ_COUNT] = {
> [USART3_RXC_IRQ] = 55,
> [USART3_DRE_IRQ] = 56,
> [USART3_TXC_IRQ] = 57,
> +}, irq16u4_32u4[IRQ_COUNT] = {
> + [RESET_IRQ] = 1,
> + [INT0_IRQ] = 2,
> + [INT1_IRQ] = 3,
> + [INT2_IRQ] = 4,
> + [INT3_IRQ] = 5,
> + [INT6_IRQ] = 8,
> + [PCINT0_IRQ] = 10,
> + [USB_GEN_IRQ] = 11,
> + [USB_EP_IRQ] = 12,
> + [WDT_IRQ] = 13,
> + [TIMER1_CAPT_IRQ] = 17,
> + [TIMER1_COMPA_IRQ] = 18,
> + [TIMER1_COMPB_IRQ] = 19,
> + [TIMER1_COMPC_IRQ] = 20,
> + [TIMER1_OVF_IRQ] = 21,
> + [TIMER0_COMPA_IRQ] = 22,
> + [TIMER0_COMPB_IRQ] = 23,
> + [TIMER0_OVF_IRQ] = 24,
> + [SPI_IRQ] = 25,
> + [USART0_RXC_IRQ] = 26,
> + [USART0_DRE_IRQ] = 27,
> + [USART0_TXC_IRQ] = 28,
> + [ANALOG_COMP] = 29,
> + [ADC_IRQ] = 30,
> + [EE_READY_IRQ] = 31,
> + [TIMER3_CAPT_IRQ] = 32,
> + [TIMER3_COMPA_IRQ] = 33,
> + [TIMER3_COMPB_IRQ] = 34,
> + [TIMER3_COMPC_IRQ] = 35,
> + [TIMER3_OVF_IRQ] = 36,
> + [TWI_IRQ] = 37,
> + [SPM_READY_IRQ] = 38,
> + [TIMER4_COMPA_IRQ] = 39,
> + [TIMER4_COMPB_IRQ] = 40,
> + [TIMER4_COMPC_IRQ] = 41,
> + [TIMER4_OVF_IRQ] = 42,
> + /*[TIMER4_FPF_IRQ] = 43,*/
> };
>
> static void connect_peripheral_irq(const AtmegaMcuClass *k,
> @@ -427,6 +511,36 @@ static void atmega2560_class_init(ObjectClass *oc,
> void *data)
> amc->dev = dev1280_2560;
> };
>
> +static void atmega16u4_class_init(ObjectClass *oc, void *data)
> +{
> + AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
> +
> + amc->cpu_type = AVR_CPU_TYPE_NAME("avr5");
> + amc->flash_size = 16 * KiB;
> + amc->eeprom_size = 512;
> + amc->sram_size = KiB + 256;
> + amc->io_size = 64;
> + amc->gpio_count = 32;
> + amc->adc_count = 12;
> + amc->irq = irq16u4_32u4;
> + amc->dev = dev16u4_32u4;
> +};
> +
> +static void atmega32u4_class_init(ObjectClass *oc, void *data)
> +{
> + AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
> +
> + amc->cpu_type = AVR_CPU_TYPE_NAME("avr5");
> + amc->flash_size = 32 * KiB;
> + amc->eeprom_size = KiB;
> + amc->sram_size = 2 * KiB + 512;
> + amc->io_size = 64;
> + amc->gpio_count = 32;
> + amc->adc_count = 12;
> + amc->irq = irq16u4_32u4;
> + amc->dev = dev16u4_32u4;
> +};
> +
> static const TypeInfo atmega_mcu_types[] = {
> {
> .name = TYPE_ATMEGA168_MCU,
> @@ -444,6 +558,14 @@ static const TypeInfo atmega_mcu_types[] = {
> .name = TYPE_ATMEGA2560_MCU,
> .parent = TYPE_ATMEGA_MCU,
> .class_init = atmega2560_class_init,
> + }, {
> + .name = TYPE_ATMEGA16U4_MCU,
> + .parent = TYPE_ATMEGA_MCU,
> + .class_init = atmega16u4_class_init,
> + }, {
> + .name = TYPE_ATMEGA32U4_MCU,
> + .parent = TYPE_ATMEGA_MCU,
> + .class_init = atmega32u4_class_init,
> }, {
> .name = TYPE_ATMEGA_MCU,
> .parent = TYPE_SYS_BUS_DEVICE,
> diff --git a/hw/avr/atmega.h b/hw/avr/atmega.h
> index a99ee15c7e..37d36b9b69 100644
> --- a/hw/avr/atmega.h
> +++ b/hw/avr/atmega.h
> @@ -22,6 +22,8 @@
> #define TYPE_ATMEGA328_MCU "ATmega328"
> #define TYPE_ATMEGA1280_MCU "ATmega1280"
> #define TYPE_ATMEGA2560_MCU "ATmega2560"
> +#define TYPE_ATMEGA16U4_MCU "ATmega16U4"
> +#define TYPE_ATMEGA32U4_MCU "ATmega32U4"
>
> typedef struct AtmegaMcuState AtmegaMcuState;
> DECLARE_INSTANCE_CHECKER(AtmegaMcuState, ATMEGA_MCU,
> --
> 2.38.4
>
--
Best Regards,
Michael Rolnik
© 2016 - 2026 Red Hat, Inc.