Differences

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--- jtag [2017/09/06 14:38] – [ST-LINK/V2 clone] kingkevin
+++ jtag [2018/01/06 12:09] – [Altera USB-Blaster] fix typo kingkevin
@@ Line 130: / Line 130: @@
 The [[http://betemcu.cn/|Baite]] [[https://www.aliexpress.com/store/product/Best-Quality-ST-Link-stlink-V2-for-STM8S-STM8L-STM32-Cortex-M0-Cortex-M3-SWIM-JTAG/213957_32676015777.html|ST-Link V2]] is my favorite clone since it supports JTAG, SWD, and SWIM (for STM8).
-The seem to use the same board also for several other programmers, and since the pinout is not on the case I've decided to make my own sticker.
+They seem to use the same board also for several other programmers, and since the pinout is not on the case I've decided to make my own sticker.
 {{:jtag:dsc02406.jpg?0x100|pinout sticker}}
@@ Line 141: / Line 141: @@
 {{:jtag:baite-v2a-board_back.jpg?0x100|board front}}
-There is a newer version marked as "V2A" (under the crystal), but the {{:jtag:baite-v2a.pdf|schematic}} is pretty much the small with the following changes:
+There is a newer version marked as "V2A" (under the crystal), but the {{:jtag:baite-v2a.pdf|schematic}} is pretty much the same with the following changes:
   * all pads for the micro-controller are present (there is even solder mask between them)
   * they added a SWD port
@@ Line 243: / Line 243: @@
 </code>
 ===== Altera USB-Blaster =====
+{{ :jtag:dsc02418.jpg?0x150|device front}}
 The [[https://www.buyaltera.com/PartDetail?partId=1212940|USB-Blaster]] is from Altera.
 It is often used to flash FPGA, but is a general purpose JTAG adapter.
-I have a cheap [[http://www.aliexpress.com/item/Free-shipping-New-Mini-Usb-Blaster-Cable-For-CPLD-FPGA-NIOS-JTAG-Altera-Programmer-in-stock/806527241.html|Rev.c clone]].
-The original uses FTDI FT245 and MAX CPLD chips.
-This one uses a Silicon Labs C8051F321 micro-controller and a 74LVC125 quad buffer, but there are many other clone variants.
-{{:jtag:dsc02418.jpg?0x100|device front}}
-{{:jtag:dsc02419.jpg?0x100|device back}}
-{{:jtag:dsc02420.jpg?0x100|PCB front}}
-{{:jtag:dsc02424.jpg?0x100|PCB back}}
 :!: be aware that here the VCC{TARGET} pin has to be connected to a reference voltage used for the JTAG communication, generally provided by the target device on the board (often 3.3V or 1.8V).
@@ Line 267: / Line 260: @@
 </code>
-To be able to use it I had to recompile OpenOCD for the USB-Blaster to use libftdi (probable because it's a clone).
+To be able to use it I had to recompile OpenOCD for the USB-Blaster to use libftdi (maybe because it's a clone).
 <code bash>
 git clone http://git.code.sf.net/p/openocd/code openocd-code
@@ Line 332: / Line 325: @@
 </code>
+The original uses FTDI FT245 and MAX CPLD chips.
+There are numerous clone variants, with various quality and voltage support.
+==== SiLabs USB-Blaster ====
+This one uses a Silicon Labs C8051F321 micro-controller and a 74LVC125 quad buffer (for signal voltages from 1.65 to 3.6 V).
+{{:jtag:mini_silabs_front.jpg?0x150|SiLabs USB-Blaster front}}
+{{:jtag:mini_silabs_back.jpg?0x150|SiLabs USB-Blaster back}}
+==== PIC USB-Blaster ====
+This one uses a Microchip PIC18F14 micro-controller and has no buffer (thus only supporting 5 V signals).
+{{:jtag:mini_pic_front.jpg?0x150|PIC USB-Blaster front}}
+{{:jtag:mini_pic_back.jpg?0x150|PIC USB-Blaster back}}
+==== ARMJISHU USB-Blaster ====
+This one uses a ST STM32F101 (as a STM32F103 with USB support) micro-controller and a 74HC244 octal-buffer (for signal voltages from 2.0 to 6.0 V).
+{{:jtag:mini_stm32_front.jpg?0x150|ARMJISHU USB-Blaster front}}
+{{:jtag:mini_stm32_back.jpg?0x150|ARMJISHU USB-Blaster back}}
+I also reversed the {{:jtag:bus_blaster-stm32.pdf|schematic}}.
+It shows that the hardware can also drive the signals (at 3.3 V) in case Vcc_target is not connected, and you can add an uSD card slot or SPI flash.
+I don't know if these features are supported in software.
+{{:jtag:mini_stm32_front-board.jpg?0x150|ARMJISHU board USB-Blaster front}}
+{{:jtag:mini_stm32_back-board.jpg?0x150|ARMJISHU board USB-Blaster back}}
 ===== SEGGER J-Link =====