From 8390996ef6fa5dbcea989767b3795f2ffa4c8259 Mon Sep 17 00:00:00 2001 From: on1aad Leo Bistmans Date: Wed, 28 Oct 2026 19:26:36 +0100 Subject: [PATCH 1/4] Retevis C62 short flash guide. --- hardware/c62.md | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/hardware/c62.md b/hardware/c62.md index 559cdbe..2234a2f 100644 --- a/hardware/c62.md +++ b/hardware/c62.md @@ -5,6 +5,31 @@ multi-core SoC that pairs an ARM Cortex-M33 application core with a Cadence HiFi DSP and a small NPU. The DSP and NPU drive the radio's "AI noise reduction". RF is handled by a BK4819, the same chip found in the Quansheng UV-K5, with a BK1080 for broadcast FM. + +## flash current build + +28 october 2026: +Expect working fm rx and tx, no battery status, empty config after device reboot. +Find openrtx-c62.zip on https://github.com/OpenRTX/OpenRTX/pull/550 and unzip + +Where to find cskburn tool +https://github.com/LISTENAI/cskburn/releases/tag/v1.30.0 + cskburn --version + v1.30.0 (403) +Note 1.31 might have a bug, unable to take backup firmware from device. + +Connect kenwood 2 plug to usb, press lower ptt and turn on C62. +You have to do this after every action, as the radio gets reset. + +Check cable communication ( serial port might be different ) + cskburn -C 6 -s /dev/ttyUSB4 --chip-id -b 115200 + +Take backup off current firmware: + cskburn --read "0x0:4194304:factory_.bin" -C 6 -b 115200 -v -s /dev/ttyUSB4 + +Put downloaded OpenRTX bin on the radio + cskburn -s /dev/ttyUSB4 -C 6 -b 115200 0x000000 zephyr.bin + ## Development status From 3715ddc923a333860cfe8be9a8237f7b5115e61b Mon Sep 17 00:00:00 2001 From: on1aad Leo Bistmans Date: Wed, 28 Oct 2026 20:17:40 +0100 Subject: [PATCH 2/4] update FM RX in status C62. --- dev_status.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/dev_status.md b/dev_status.md index e48e0e2..a65d0f7 100644 --- a/dev_status.md +++ b/dev_status.md @@ -54,7 +54,7 @@ OpenRTX is currently in active development. There will be bugs as we prioritize | Lilygo T-TWR plus |✅ | ✅ | N/A | ❌ | ❌ | ❌ | ❌ | N/A | N/A | N/A | | Radtel RT-890 |❌ | ❌ | N/A | ❌ | ❌ | ❌ | ❌ | N/A | N/A | N/A | | Talkpod A36plus |✅ | ✅ | 🟡 | ❌ | ❌ | ❌ | ❌ | N/A | N/A | N/A | -| Retevis C62 |✅ | ❌ | N/A | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | +| Retevis C62 |✅ | ✅ | N/A | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | ❌ | | Connect Systems CS7000-M17 |✅ | ✅ | N/A | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ | | Connect Systems CS7000-M17 Plus |✅ | ✅ | N/A | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ | ❌ | From 49f359a707936d5eb52da9c25ad7cd78bb58d5ff Mon Sep 17 00:00:00 2001 From: on1aad Leo Bistmans Date: Wed, 28 Oct 2026 20:22:45 +0100 Subject: [PATCH 3/4] C62 flash guide layout. --- hardware/c62.md | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/hardware/c62.md b/hardware/c62.md index 2234a2f..732fe2e 100644 --- a/hardware/c62.md +++ b/hardware/c62.md @@ -8,27 +8,37 @@ for broadcast FM. ## flash current build -28 october 2026: -Expect working fm rx and tx, no battery status, empty config after device reboot. +Update 28 october 2026: + +Expect working fm rx and tx, empty config after device reboot. + Find openrtx-c62.zip on https://github.com/OpenRTX/OpenRTX/pull/550 and unzip Where to find cskburn tool https://github.com/LISTENAI/cskburn/releases/tag/v1.30.0 +```bash cskburn --version v1.30.0 (403) +``` Note 1.31 might have a bug, unable to take backup firmware from device. Connect kenwood 2 plug to usb, press lower ptt and turn on C62. You have to do this after every action, as the radio gets reset. Check cable communication ( serial port might be different ) +```bash cskburn -C 6 -s /dev/ttyUSB4 --chip-id -b 115200 +``` -Take backup off current firmware: +Take backup from C62 device current firmware: +```bash cskburn --read "0x0:4194304:factory_.bin" -C 6 -b 115200 -v -s /dev/ttyUSB4 +``` Put downloaded OpenRTX bin on the radio +```bash cskburn -s /dev/ttyUSB4 -C 6 -b 115200 0x000000 zephyr.bin +``` ## Development status From e25d154a64fc5cda665a6c5f56f3d91b03e38894 Mon Sep 17 00:00:00 2001 From: NespaLa <143425117+NespaLa@users.noreply.github.com> Date: Sat, 31 Oct 2026 16:09:47 +0100 Subject: [PATCH 4/4] Update c62.md chipid changed to chip-id --- hardware/c62.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hardware/c62.md b/hardware/c62.md index 2234a2f..2205442 100644 --- a/hardware/c62.md +++ b/hardware/c62.md @@ -25,7 +25,7 @@ Check cable communication ( serial port might be different ) cskburn -C 6 -s /dev/ttyUSB4 --chip-id -b 115200 Take backup off current firmware: - cskburn --read "0x0:4194304:factory_.bin" -C 6 -b 115200 -v -s /dev/ttyUSB4 + cskburn --read "0x0:4194304:factory_.bin" -C 6 -b 115200 -v -s /dev/ttyUSB4 Put downloaded OpenRTX bin on the radio cskburn -s /dev/ttyUSB4 -C 6 -b 115200 0x000000 zephyr.bin