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Merged
merged 2 commits into from
Aug 6, 2025
Merged

Add os.urandom to ports/analog #10549

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3aa680c
Add os.urandom module to ports/analog for MAX32690_apard
PaggieZ Aug 4, 2025
06f1ac3
update licenses
PaggieZ Aug 5, 2025
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8 changes: 6 additions & 2 deletions ports/analog/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
#
# SPDX-FileCopyrightText: Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
# SPDX-FileCopyrightText: Copyright (c) 2024 Brandon Hurst, Analog Devices, Inc.
# SPDX-FileCopyrightText: Copyright (c) 2025 Peggy Zhu, Analog Devices, Inc.
#
# SPDX-License-Identifier: MIT

Expand Down Expand Up @@ -83,7 +84,8 @@ INC += \
-I$(PERIPH_SRC)/ICC \
-I$(PERIPH_SRC)/TMR \
-I$(PERIPH_SRC)/RTC \
-I$(PERIPH_SRC)/UART
-I$(PERIPH_SRC)/UART \
-I$(PERIPH_SRC)/TRNG

INC += -I$(CMSIS_ROOT)/Device/Maxim/$(MCU_VARIANT_UPPER)/Source/GCC

Expand Down Expand Up @@ -116,7 +118,9 @@ SRC_MAX32 += \
$(PERIPH_SRC)/TMR/tmr_$(DIE_TYPE).c \
$(PERIPH_SRC)/UART/uart_common.c \
$(PERIPH_SRC)/UART/uart_$(DIE_TYPE).c \
$(PERIPH_SRC)/UART/uart_revb.c
$(PERIPH_SRC)/UART/uart_revb.c \
$(PERIPH_SRC)/TRNG/trng_revb.c \
$(PERIPH_SRC)/TRNG/trng_$(DIE_TYPE).c

SRC_C += $(SRC_MAX32) \
boards/$(BOARD)/board.c \
Expand Down
8 changes: 7 additions & 1 deletion ports/analog/common-hal/os/__init__.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
//
// SPDX-FileCopyrightText: Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
// SPDX-FileCopyrightText: Copyright (c) 2019 Lucian Copeland for Adafruit Industries
// SPDX-FileCopyrightText: Copyright (c) 2025 Peggy Zhu, Analog Devices, Inc.
//
// SPDX-License-Identifier: MIT

Expand All @@ -15,9 +16,14 @@

// #include "peripherals/periph.h"

// true random number generator, TRNG
#include "trng.h"

bool common_hal_os_urandom(uint8_t *buffer, uint32_t length) {
#if (HAS_TRNG)
// todo (low prior): implement
// get a random number of "length" number of bytes
MXC_TRNG_Random(buffer, length);
return true;
#else
#endif
return false;
Expand Down
3 changes: 2 additions & 1 deletion ports/analog/mpconfigport.mk
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
#
# SPDX-FileCopyrightText: Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
# SPDX-FileCopyrightText: Copyright (c) 2024 Brandon Hurst, Analog Devices, Inc.
# SPDX-FileCopyrightText: Copyright (c) 2025 Peggy Zhu, Analog Devices, Inc.
#
# SPDX-License-Identifier: MIT

Expand Down Expand Up @@ -51,7 +52,7 @@ CIRCUITPY_BITBANGIO ?= 1
# Requires Microcontroller
CIRCUITPY_TOUCHIO ?= 1
# Requires OS
CIRCUITPY_RANDOM ?= 0
CIRCUITPY_RANDOM ?= 1
# Requires busio.UART
CIRCUITPY_CONSOLE_UART ?= 0
# Does nothing without I2C
Expand Down
12 changes: 12 additions & 0 deletions ports/analog/supervisor/port.c
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,9 @@
#include "mxc_delay.h"
#include "rtc.h"

// true random number generator, TRNG
#include "trng.h"

// msec to RTC subsec ticks (4 kHz)
/* Converts a time in milleseconds to equivalent RSSA register value */
#define MSEC_TO_SS_ALARM(x) (0 - ((x * 4096) / 1000))
Expand Down Expand Up @@ -112,9 +115,18 @@ safe_mode_t port_init(void) {
}
;

// enable TRNG (true random number generator)
#ifdef CIRCUITPY_RANDOM
MXC_TRNG_Init();
#endif

return SAFE_MODE_NONE;
}

void TRNG_IRQHandler(void) {
MXC_TRNG_Handler();
}

void RTC_IRQHandler(void) {
// Read flags to clear
int flags = MXC_RTC_GetFlags();
Expand Down