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Add UF2 bootloader for USB firmware flashing

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Vendored and trimmed from microsoft/uf2-samdx1, adapted to the actual
ATSAMD21G17D (128 KiB flash / 16 KiB RAM), fixing the flash/RAM-size
mismatch that the previously commented-out SAM-BA bootloader target
had (it assumed a 256 KiB SAMD21G18A). Builds as a standalone
PlatformIO environment (bootloader/platformio.ini), no python2/make
dependency. Compiles clean, fits in the 8 KiB bootloader region
(7292/8192 bytes). Not yet flashed/verified on real hardware.
This commit is contained in:
cjjohn 2026-08-03 20:56:58 +02:00
parent ce5db617a1
commit de52b57041
143 changed files with 69119 additions and 0 deletions
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84
bootloader/lib/samd21/samd21a/include/instance/dsu.h Normal file
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/**
* \file
*
* \brief Instance description for DSU
*
* Copyright (c) 2016 Atmel Corporation,
* a wholly owned subsidiary of Microchip Technology Inc.
*
* \asf_license_start
*
* \page License
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the Licence at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* \asf_license_stop
*
*/
#ifndef _SAMD21_DSU_INSTANCE_
#define _SAMD21_DSU_INSTANCE_
/* ========== Register definition for DSU peripheral ========== */
#if (defined(__ASSEMBLY__) || defined(__IAR_SYSTEMS_ASM__))
#define REG_DSU_CTRL (0x41002000) /**< \brief (DSU) Control */
#define REG_DSU_STATUSA (0x41002001) /**< \brief (DSU) Status A */
#define REG_DSU_STATUSB (0x41002002) /**< \brief (DSU) Status B */
#define REG_DSU_ADDR (0x41002004) /**< \brief (DSU) Address */
#define REG_DSU_LENGTH (0x41002008) /**< \brief (DSU) Length */
#define REG_DSU_DATA (0x4100200C) /**< \brief (DSU) Data */
#define REG_DSU_DCC0 (0x41002010) /**< \brief (DSU) Debug Communication Channel 0 */
#define REG_DSU_DCC1 (0x41002014) /**< \brief (DSU) Debug Communication Channel 1 */
#define REG_DSU_DID (0x41002018) /**< \brief (DSU) Device Identification */
#define REG_DSU_ENTRY0 (0x41003000) /**< \brief (DSU) Coresight ROM Table Entry 0 */
#define REG_DSU_ENTRY1 (0x41003004) /**< \brief (DSU) Coresight ROM Table Entry 1 */
#define REG_DSU_END (0x41003008) /**< \brief (DSU) Coresight ROM Table End */
#define REG_DSU_MEMTYPE (0x41003FCC) /**< \brief (DSU) Coresight ROM Table Memory Type */
#define REG_DSU_PID4 (0x41003FD0) /**< \brief (DSU) Peripheral Identification 4 */
#define REG_DSU_PID0 (0x41003FE0) /**< \brief (DSU) Peripheral Identification 0 */
#define REG_DSU_PID1 (0x41003FE4) /**< \brief (DSU) Peripheral Identification 1 */
#define REG_DSU_PID2 (0x41003FE8) /**< \brief (DSU) Peripheral Identification 2 */
#define REG_DSU_PID3 (0x41003FEC) /**< \brief (DSU) Peripheral Identification 3 */
#define REG_DSU_CID0 (0x41003FF0) /**< \brief (DSU) Component Identification 0 */
#define REG_DSU_CID1 (0x41003FF4) /**< \brief (DSU) Component Identification 1 */
#define REG_DSU_CID2 (0x41003FF8) /**< \brief (DSU) Component Identification 2 */
#define REG_DSU_CID3 (0x41003FFC) /**< \brief (DSU) Component Identification 3 */
#else
#define REG_DSU_CTRL (*(WoReg8 *)0x41002000UL) /**< \brief (DSU) Control */
#define REG_DSU_STATUSA (*(RwReg8 *)0x41002001UL) /**< \brief (DSU) Status A */
#define REG_DSU_STATUSB (*(RoReg8 *)0x41002002UL) /**< \brief (DSU) Status B */
#define REG_DSU_ADDR (*(RwReg *)0x41002004UL) /**< \brief (DSU) Address */
#define REG_DSU_LENGTH (*(RwReg *)0x41002008UL) /**< \brief (DSU) Length */
#define REG_DSU_DATA (*(RwReg *)0x4100200CUL) /**< \brief (DSU) Data */
#define REG_DSU_DCC0 (*(RwReg *)0x41002010UL) /**< \brief (DSU) Debug Communication Channel 0 */
#define REG_DSU_DCC1 (*(RwReg *)0x41002014UL) /**< \brief (DSU) Debug Communication Channel 1 */
#define REG_DSU_DID (*(RoReg *)0x41002018UL) /**< \brief (DSU) Device Identification */
#define REG_DSU_ENTRY0 (*(RoReg *)0x41003000UL) /**< \brief (DSU) Coresight ROM Table Entry 0 */
#define REG_DSU_ENTRY1 (*(RoReg *)0x41003004UL) /**< \brief (DSU) Coresight ROM Table Entry 1 */
#define REG_DSU_END (*(RoReg *)0x41003008UL) /**< \brief (DSU) Coresight ROM Table End */
#define REG_DSU_MEMTYPE (*(RoReg *)0x41003FCCUL) /**< \brief (DSU) Coresight ROM Table Memory Type */
#define REG_DSU_PID4 (*(RoReg *)0x41003FD0UL) /**< \brief (DSU) Peripheral Identification 4 */
#define REG_DSU_PID0 (*(RoReg *)0x41003FE0UL) /**< \brief (DSU) Peripheral Identification 0 */
#define REG_DSU_PID1 (*(RoReg *)0x41003FE4UL) /**< \brief (DSU) Peripheral Identification 1 */
#define REG_DSU_PID2 (*(RoReg *)0x41003FE8UL) /**< \brief (DSU) Peripheral Identification 2 */
#define REG_DSU_PID3 (*(RoReg *)0x41003FECUL) /**< \brief (DSU) Peripheral Identification 3 */
#define REG_DSU_CID0 (*(RoReg *)0x41003FF0UL) /**< \brief (DSU) Component Identification 0 */
#define REG_DSU_CID1 (*(RoReg *)0x41003FF4UL) /**< \brief (DSU) Component Identification 1 */
#define REG_DSU_CID2 (*(RoReg *)0x41003FF8UL) /**< \brief (DSU) Component Identification 2 */
#define REG_DSU_CID3 (*(RoReg *)0x41003FFCUL) /**< \brief (DSU) Component Identification 3 */
#endif /* (defined(__ASSEMBLY__) || defined(__IAR_SYSTEMS_ASM__)) */
/* ========== Instance parameters for DSU peripheral ========== */
#define DSU_CLK_HSB_ID 3 // Index of AHB clock in PM.AHBMASK register
#endif /* _SAMD21_DSU_INSTANCE_ */