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| -rw-r--r-- | docs/source/hardware/maple-mini.rst | 367 | ||||
| -rw-r--r-- | docs/source/hardware/maple-native.rst | 6 | ||||
| -rw-r--r-- | docs/source/hardware/maple-ret6.rst | 442 | ||||
| -rw-r--r-- | docs/source/hardware/maple.rst | 572 |
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diff --git a/docs/source/hardware/maple-mini.rst b/docs/source/hardware/maple-mini.rst deleted file mode 100644 index b142e77..0000000 --- a/docs/source/hardware/maple-mini.rst +++ /dev/null @@ -1,367 +0,0 @@ -.. _maple-mini: - -Maple Mini -========== - -This page is a general resource for information specific to the Maple -Mini. The Maple Mini is a smaller version of the Maple that fits on a -breadboard. - -.. contents:: Contents - :local: - -.. TODO [dma.rst] Ref to dma.rst in sequel instead of libmaple-dma - -Technical Specifications ------------------------- - -* MCU: **STM32F103RCBT6**, a 32-bit ARM Cortex M3 microprocessor -* Clock Speed: **72 MHz** -* **128 KB Flash** and **20 KB SRAM** -* 34 Digital I/O Pins (:ref:`gpio`) -* 12 **PWM** pins at 16 bit resolution (:ref:`pwm`) -* 9 analog input pins, 12 bit **ADC** resolution (:ref:`adc`) -* 2 **SPI** peripherals (:ref:`spi`) -* 2 **I2C** peripherals (:ref:`i2c`) -* 7 Channels of Direct Memory Access (**DMA**) (:ref:`libmaple-dma`) -* 3 **USART** peripherals (:ref:`usart`) -* 1 advanced and 3 general-purpose **timers** (:ref:`timers`) -* Dedicated **USB** port for programming and communications (:ref:`usb`) -* **JTAG** (:ref:`jtag`) -* Nested Vectored Interrupt Controller (NVIC) (including - :ref:`external interrupt <external-interrupts>` on GPIOs) -* Supplies up to 500 mA at 3.3 V, with :ref:`separate 250 mA digital - and analog regulators <maple-mini-adc-bank>` for low-noise analog - performance -* :ref:`Four layer design <maple-mini-hardware>` -* Support for low power, sleep, and standby modes (<500 μA) -* Operating Voltage: 3.3 V -* Input Voltage (recommended): 3 V — 12 V -* Dimensions: 2.02″ × 0.72″ - -.. _maple-mini-powering: - -Powering the Maple Mini ------------------------ - -You can power the Maple Mini via the USB plug or by powering Vin -directly. - -.. warning:: The silkscreen on the Maple Mini suggests it will accept - an input voltage up to 16 V. We recommend applying **no greater - than 12 V**. - - See :ref:`this erratum <maple-mini-vin>` for more information. - -.. _maple-mini-gpios: - -GPIO Information ----------------- - -The Maple Mini features 34 total input/output pins, numbered ``D0`` -through ``D33``. These numbers correspond to the numeric values next -to each header on the Maple Mini's silkscreen. However, some of them -have special uses by default [#fusedpins]_. - -.. _maple-mini-usb-pins: - -Pin ``D23`` is the :ref:`USB <usb>` D+ line, and ``D24`` is the USB D- -line. To use them as GPIOs, your program will need to :ref:`disable -SerialUSB <lang-serialusb-end>` first. Be aware, however, that -disabling SerialUSB means that the :ref:`bootloader <bootloader>` -won't work properly, and you'll need to use -:ref:`troubleshooting-perpetual-bootloader` to make your next upload. - -.. _maple-mini-but: - -Pin ``D32`` is the Mini's :ref:`button pin <lang-board-values-but>`. -It is thus mainly useful as an :ref:`input <lang-pin-levels>`. The -pin will :ref:`read <lang-digitalread>` ``HIGH`` when the :ref:`button -is pressed <lang-isbuttonpressed>`. - -.. _maple-mini-led: - -Pin ``D33`` is the Mini's :ref:`LED pin <lang-board-values-led>`. It -is thus mainly useful as an :ref:`output <lang-pin-levels>`. The LED -will glow when ``HIGH`` is :ref:`written <lang-digitalwrite>` to it. -(It also supports :ref:`pwm`, for finer-grained brightness control). - -.. TODO [0.1.0] silkscreen pictures which expand abbreviations - -.. _maple-mini-pin-map-master: - -Master Pin Map -^^^^^^^^^^^^^^ - -This table shows a summary the available functionality on every GPIO -pin, by peripheral type. The "5 V?" column documents whether or not -the pin is :ref:`5 volt tolerant <gpio-5v-tolerant>`. - -.. csv-table:: - :header: Pin, :ref:`GPIO <gpio>`, :ref:`ADC <adc>`, :ref:`Timer <timers>`, :ref:`I2C <i2c>`, :ref:`UART <usart>`, :ref:`SPI <spi>`, 5 V? - - D0, PB11, -, -, 2_SDA, 3_RX, -, Yes - D1, PB10, -, -, 2_SCL, 3_TX, -, Yes - D2, PB2, -, -, -, -, -, Yes - D3, PB0, CH8, 3_CH3, -, -, -, - - D4, PA7, CH7, 3_CH2, -, -, 1_MOSI, - - D5, PA6, CH6, 3_CH1, -, -, 1_MISO, - - D6, PA5, CH5, -, -, -, 1_SCK, - - D7, PA4, CH4, -, -, 2_CK, 1_NSS, - - D8, PA3, CH3, 2_CH4, -, 2_RX, -, - - D9, PA2, CH2, 2_CH3, -, 2_TX, -, - - D10, PA1, CH1, 2_CH2, -, 2_RTS, -, - - D11, PA0, CH0, 2_CH1_ETR, -, 2_CTS, -, - - D12, PC15, -, -, -, -, -, - - D13, PC14, -, -, -, -, -, - - D14, PC13, -, -, -, -, -, - - D15, PB7, -, 4_CH2, 1_SDA, -, -, Yes - D16, PB6, -, 4_CH1, 2_SCL, -, -, Yes - D17, PB5, -, -, 1_SMBA, -, -, - - D18, PB4, -, -, -, -, -, Yes - D19, PB3, -, -, -, -, -, Yes - D20, PA15, -, -, -, -, -, Yes - D21, PA14, -, -, -, -, -, Yes - D22, PA13, -, -, -, -, -, Yes - D23, PA12, -, 1_ETR, -, 1_RTS, -, Yes - D24, PA11, -, 1_CH4, -, 1_CTS, -, Yes - D25, PA10, -, 1_CH3, -, 1_RX, -, Yes - D26, PA9, -, 1_CH2, -, 1_TX, -, Yes - D27, PA8, -, 1_CH1, -, 1_CK, -, Yes - D28, PB15, -, -, -, -, 2_MOSI, Yes - D29, PB14, -, -, -, 3_RTS, 2_MISO, Yes - D30, PB13, -, -, -, 3_CTS, 2_SCK, Yes - D31, PB12, -, 1_BKIN, 2_SMBA, 3_CK, 2_NSS, Yes - D32, PB8, -, 4_CH3, -, -, -, Yes - D33, PB1, CH9, 3_CH4, -, -, -, - - -.. _maple-mini-gpio-port-map: - -GPIO Port Pin Map -^^^^^^^^^^^^^^^^^ -The following table shows what pins are associated with each -:ref:`GPIO port <gpio-ports>`. - -.. csv-table:: - :header: GPIOA, GPIOB, GPIOC - - PA0: D11, PB0: D3, PC0: - - PA1: D10, PB1: D33, PC1: - - PA2: D9, PB2: D2, PC2: - - PA3: D8, PB3: D19, PC3: - - PA4: D7, PB4: D18, PC4: - - PA5: D6, PB5: D17, PC5: - - PA6: D5, PB6: D16, PC6: - - PA7: D4, PB7: D15, PC7: - - PA8: D27, PB8: D32, PC8: - - PA9: D26, PB9: -, PC9: - - PA10: D25, PB10: D1, PC10: - - PA11: D24, PB11: D0, PC11: - - PA12: D23, PB12: D31, PC12: - - PA13: D22, PB13: D30, PC13: D14 - PA14: D21, PB14: D29, PC14: D13 - PA15: D20, PB15: D28, PC15: D12 - -.. _maple-mini-timer-map: - -Timer Pin Map -^^^^^^^^^^^^^ - -The following table shows what pins are associated with a particular -timer's capture/compare channels. - -.. csv-table:: - :header: Timer, Ch. 1, Ch. 2, Ch. 3, Ch. 4 - :delim: | - - 1 | D27 | D26 | D25 | D24 - 2 | D11 | D10 | D9 | D8 - 3 | D5 | D4 | D3 | :ref:`D33 <maple-mini-led>` - 4 | D16 | D15 | :ref:`D32 <maple-mini-but>` | - -.. _maple-mini-exti-map: - -EXTI Line Pin Map -^^^^^^^^^^^^^^^^^ - -The following table shows which pins connect to which :ref:`EXTI lines -<external-interrupts-exti-line>` on the Maple. - -.. list-table:: - :widths: 1 1 - :header-rows: 1 - - * - EXTI Line - - Pins - * - EXTI0 - - 3, 11 - * - EXTI1 - - 10, 33 - * - EXTI2 - - 2, 9 - * - EXTI3 - - 8, 19 - * - EXTI4 - - 7, 18 - * - EXTI5 - - 6, 17 - * - EXTI6 - - 5, 16 - * - EXTI7 - - 4, 15 - * - EXTI8 - - 27, 32 - * - EXTI9 - - 26 - * - EXTI10 - - 1, 25 - * - EXTI11 - - 0, 24 - * - EXTI12 - - 23, 31 - * - EXTI13 - - 14, 22, 30 - * - EXTI14 - - 13, 21, 29 - * - EXTI15 - - 12, 20, 28 - -.. _maple-mini-usart-map: - -USART Pin Map -^^^^^^^^^^^^^ - -The Maple RET6 Edition has three serial ports whose pins are broken -out to headers (also known as :ref:`USARTs <usart>`). They communicate -using the pins summarized in the following table: - -.. csv-table:: - :header: Serial Port, TX, RX, CK, CTS, RTS - :delim: | - - ``Serial1`` | 26 | 25 | 27 | 24 | 23 - ``Serial2`` | 9 | 8 | 7 | 11 | 10 - ``Serial3`` | 1 | 0 | 31 | 30 | 29 - -.. _maple-mini-adc-bank: - -Low-Noise ADC Pins -^^^^^^^^^^^^^^^^^^ - -Maple Mini has an electrically isolated analog power plane with its -own regulator, and a geometrically isolated ground plane, connected to -the digital plane by an inductor. Its analog input pins, D3 — D11, -are laid out to correspond with these analog planes, and our -measurements indicate that they generally offer low noise ADC -performance. However, analog performance may vary depending upon the -activity of the other GPIOs. Consult the :ref:`Maple Mini hardware -design files <maple-mini-hardware>` for more details. - -.. _maple-mini-board-values: - -Board-Specific Values ---------------------- - -This section lists the Maple Mini's :ref:`board-specific values -<lang-board-values>`. - -- ``CYCLES_PER_MICROSECOND``: 72 -- ``BOARD_BUTTON_PIN``: 32 -- ``BOARD_LED_PIN``: 33 -- ``BOARD_NR_GPIO_PINS``: 34 -- ``BOARD_NR_PWM_PINS``: 12 -- ``boardPWMPins``: 3, 4, 5, 8, 9, 10, 11, 15, 16, 25, 26, 27 -- ``BOARD_NR_ADC_PINS``: 9 -- ``boardADCPins``: 3, 4, 5, 6, 7, 8, 9, 10, 11 -- ``BOARD_NR_USED_PINS``: 4 -- ``boardUsedPins``: ``BOARD_LED_PIN``, ``BOARD_BUTTON_PIN``, 23, 24 - (23 and 24 are used by :ref:`USB <maple-mini-usb-pins>`) -- ``BOARD_NR_USARTS``: 3 -- ``BOARD_USART1_TX_PIN``: 26 -- ``BOARD_USART1_RX_PIN``: 25 -- ``BOARD_USART2_TX_PIN``: 9 -- ``BOARD_USART2_RX_PIN``: 8 -- ``BOARD_USART3_TX_PIN``: 1 -- ``BOARD_USART3_RX_PIN``: 0 -- ``BOARD_NR_SPI``: 2 -- ``BOARD_SPI1_NSS_PIN``: 7 -- ``BOARD_SPI1_MOSI_PIN``: 4 -- ``BOARD_SPI1_MISO_PIN``: 5 -- ``BOARD_SPI1_SCK_PIN``: 6 -- ``BOARD_SPI2_NSS_PIN``: 31 -- ``BOARD_SPI2_MOSI_PIN``: 28 -- ``BOARD_SPI2_MISO_PIN``: 29 -- ``BOARD_SPI2_SCK_PIN``: 30 -- ``BOARD_JTMS_SWDIO_PIN``: 22 -- ``BOARD_JTCK_SWCLK_PIN``: 21 -- ``BOARD_JTDI_PIN``: 20 -- ``BOARD_JTDO_PIN``: 19 -- ``BOARD_NJTRST_PIN``: 18 - -.. _maple-mini-hardware: - -Hardware Design Files ---------------------- - -The hardware schematics and board layout files are available in the -`Maple Mini GitHub repository <https://github.com/leaflabs/maplemini>`_ - -From the GitHub repository main page, you can download the entire -repository by clicking the "Download" button. If you are familiar -with `Git <http://git-scm.com/>`_, you can also clone the repository -at the command line with :: - - $ git clone git://github.com/leaflabs/maplemini.git - -Failure Modes -------------- - -The following known failure modes apply to all Maple boards. The -failure modes aren't design errors, but are easy ways to break or -damage your board permanently. - -* **High voltage on non-tolerant pins**: not all header pins are 5 V - compatible; so e.g. connecting certain serial devices in the wrong - way could over-voltage the pins. The :ref:`pin-mapping master table - <maple-mini-pin-map-master>` details which pins are :ref:`5 - V-tolerant <gpio-5v-tolerant>`. - -Errata ------- - -This section lists known issues and warnings for the Maple Mini Rev 2 -(the first Rev sold to the public). - -.. _maple-mini-vin: - -* **Silkscreen Vin voltage mistake**: The silkscreen on the Maple Mini - falsely indicates that Vin may be supplied with up to 16 V. We - recommend an input voltage **no greater than 12 V**. - - The voltage regulator on the Mini is rated up to 16 V. However, our - tests indicate that as its input voltage approaches 16 V, its output - begins to rise to levels higher than those recommended by ST for - supplying the STM32F103CB. The limit of 12 V keeps the voltage - supplied to the processor at safe levels. - -Recommended Reading -------------------- - -STMicro documentation for STM32F103CB microcontroller: - -* `Datasheet - <http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00161566.pdf>`_ - (PDF); covers STM32F103x8, STM32F103xB. -* `Reference Manual RM0008 - <http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/REFERENCE_MANUAL/CD00171190.pdf>`_ - (PDF); general, definitive resource for STM32F1 line. -* `Programming Manual PM0056 - <http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/PROGRAMMING_MANUAL/CD00228163.pdf>`_ - (PDF); assembly language and register reference. -* `STM32F103CB <http://www.st.com/internet/mcu/product/189782.jsp>`_ - overview page with links to further references. - -.. rubric:: Footnotes - -.. [#fusedpins] See :ref:`boardUsedPins <lang-board-values-used-pins>` - for more information. diff --git a/docs/source/hardware/maple-native.rst b/docs/source/hardware/maple-native.rst deleted file mode 100644 index 79115fc..0000000 --- a/docs/source/hardware/maple-native.rst +++ /dev/null @@ -1,6 +0,0 @@ -.. _hardware-maple-native: - -Maple Native -============ - -Stub. diff --git a/docs/source/hardware/maple-ret6.rst b/docs/source/hardware/maple-ret6.rst deleted file mode 100644 index 1de2465..0000000 --- a/docs/source/hardware/maple-ret6.rst +++ /dev/null @@ -1,442 +0,0 @@ -.. highlight:: sh - -.. _maple-ret6: - -Maple RET6 Edition -================== - -This page is a general resource for information specific to the Maple -RET6 Edition. The Maple RET6 Edition is a "beta" board released as a -simple way to get a more powerful chip than the one on the base Maple -(the STM32F103RET6, hence the name) in the hands of Maple developers. - -.. contents:: Contents - :local: - -.. TODO [dma.rst] Ref to dma.rst in sequel instead of libmaple-dma -.. TODO [dac.rst] Ref to dac.rst in sequel instead of libmaple-dac -.. TODO [nvic.rst] Ref to nvic.rst in sequel - -Technical Specifications ------------------------- - -* MCU: **STM32F103RET6**, a 32-bit ARM Cortex M3 microprocessor -* Clock Speed: **72 MHz** -* **512 KB Flash** and **64 KB SRAM** -* 43 Digital I/O Pins (:ref:`gpio`) -* 18 **PWM** pins at 16 bit resolution (:ref:`pwm`) -* 15 analog input pins, 12 bit **ADC** resolution (:ref:`adc`) -* Built-in, 2 channel **DAC** at 12 bit resolution (:ref:`libmaple-dac`). -* 2 **SPI** peripherals with **I2S** support (:ref:`spi`) -* 2 **I2C** peripherals (:ref:`i2c`) -* 12 Channels of Direct Memory Access (**DMA**) - (:ref:`libmaple-dma`) with 2 DMA controllers -* 3 **USART** devices (:ref:`usart`) -* 2 advanced, 4 general-purpose, and 2 basic **timers** (:ref:`timers`) -* Dedicated **USB** port for programming and communications (:ref:`usb`) -* **JTAG** (:ref:`jtag`) -* Nested Vectored Interrupt Controller (NVIC) (including - :ref:`external interrupt <lang-attachinterrupt>` on GPIOs) -* Supplies up to 500 mA at 3.3 V, with :ref:`separate 250 mA digital - and analog regulators <maple-ret6-adc-bank>` for low-noise analog - performance -* :ref:`Four layer design <maple-ret6-hardware>` -* Support for low power, sleep, and standby modes (<500 μA) -* Operating Voltage: 3.3 V -* Input Voltage (recommended): 4 V — 12 V -* Dimensions are 2.05″ × 2.1″ - -.. _maple-ret6-powering: - -Powering the Maple RET6 Edition -------------------------------- - -The Maple RET6 Edition is powered in the :ref:`same way as the -standard Maple <maple-powering>`. - -.. warning:: The RET6 Edition silkscreen falsely indicates that the - barrel jack accepts up to 18 V. We recommend a barrel jack input - voltage **no greater than 12 V**. - - See :ref:`this erratum <maple-barrel-jack>` for more information. - -Using the Built-in Battery Charger ----------------------------------- - -The RET6 Edition has a built-in LiPo battery charger. In order to use -it, put a jumper across the CHRG header on the power selection header -and across the USB, or EXT selectors, depending on whether you're -charging the battery via USB cable or barrel jack connector. The LED -labeled CHRG will light up while the battery is being charged. When -the battery is finished charging, the LED labeled DONE will also light -up. - -.. _maple-ret6-gpios: - -GPIO Information ----------------- - -The RET6 Edition features 38 ready-to-use general purpose input/output -(see :ref:`gpio`) pins for digital input/output, numbered ``D0`` -through ``D37``. These numbers correspond to the numeric values next -to each header on the Maple silkscreen. - -.. _maple-ret6-but: - -Pin ``D38`` is the board's :ref:`button pin <lang-board-values-but>`. -It is thus mainly useful as an :ref:`input <lang-pin-levels>`. The -pin will :ref:`read <lang-digitalread>` ``HIGH`` when the :ref:`button -is pressed <lang-isbuttonpressed>`. - -More GPIOs (numbered ``D39``\ --``D42`` on the back of the RET6 -Edition's silkscreen) are available if you use the -:ref:`lang-disabledebugports` function; see the :ref:`board-specific -debug pin constants <lang-board-values-debug>` for more information. -(See :ref:`this erratum <maple-ret6-nrst-pb4>` for information about -the pin numbered ``43`` on the silkscreen). - -.. TODO [0.1.0] silkscreen pictures which expand abbreviations - -.. _maple-ret6-pin-map-master: - -Master Pin Map -^^^^^^^^^^^^^^ - -This table shows a summary of the available functionality on every -GPIO pin, by peripheral type. The "5 V?" column documents whether or -not the pin is :ref:`5 volt tolerant <gpio-5v-tolerant>`. - -.. csv-table:: - :header: Pin, :ref:`GPIO <gpio>`, :ref:`ADC <adc>`, :ref:`Timer <timers>`, :ref:`I2C <i2c>`, :ref:`UART/USART <usart>`, :ref:`SPI <spi>`, 5 V? - - D0, PA3, CH3, 2_CH4, -, 2_RX, -, - - D1, PA2, CH2, 2_CH3, -, 2_TX, -, - - D2, PA0, CH0, 2_CH1_ETR, -, 2_CTS, -, - - D3, PA1, CH1, 2_CH2, -, 2_RTS, -, - - D4, PB5, -, -, 1_SMBA, -, 3_MOSI, - - D5, PB6, -, 4_CH1, 1_SCL, -, -, Yes - D6, PA8, -, 1_CH1, -, 1_CK, -, Yes - D7, PA9, -, 1_CH2, -, 1_TX, -, Yes - D8, PA10, -, 1_CH3, -, 1_RX, -, Yes - D9, PB7, -, 4_CH2, 1_SDA, -, -, Yes - D10, PA4, CH4, -, -, 2_CK, 1_NSS, - - D11, PA7, CH7, 3_CH2, -, -, 1_MOSI, - - D12, PA6, CH6, 3_CH1, -, -, 1_MISO, - - D13, PA5, CH5, -, -, -, 1_SCK, - - D14, PB8, -, 4_CH3, -, -, -, Yes - D15, PC0, CH10, -, -, -, -, - - D16, PC1, CH11, -, -, -, -, - - D17, PC2, CH12, -, -, -, -, - - D18, PC3, CH13, -, -, -, -, - - D19, PC4, CH14, -, -, -, -, - - D20, PC5, CH15, -, -, -, -, - - D21, PC13, -, -, -, -, -, - - D22, PC14, -, -, -, -, -, - - D23, PC15, -, -, -, -, -, - - D24, PB9, -, 4_CH4, -, -, -, Yes - D25, PD2, -, 3_ETR, -, -, 5_RX, Yes - D26, PC10, -, -, -, -, 4_TX, Yes - D27, PB0, CH8, 3_CH3, -, -, -, - - D28, PB1, CH9, 3_CH4, -, -, -, - - D29, PB10, -, -, 2_SCL, 3_TX, -, Yes - D30, PB11, -, -, 2_SDA, 3_RX, -, Yes - D31, PB12, -, 1_BKIN, 2_SMBA, 3_CK, 2_NSS, Yes - D32, PB13, -, 1_CH1N, -, 3_CTS, 2_SCK, Yes - D33, PB14, -, 1_CH2N, -, 3_RTS, 2_MISO, Yes - D34, PB15, -, 1_CH3N, -, -, 2_MOSI, Yes - D35, PC6, -, 8_CH1, -, -, -, Yes - D36, PC7, -, 8_CH2, -, -, -, Yes - D37, PC8, -, 8_CH3, -, -, -, Yes - D38, PC9, -, 8_CH4, -, -, -, Yes - D39, PA13, -, -, -, -, -, Yes - D40, PA14, -, -, -, -, -, Yes - D41, PA15, -, -, -, -, 3_NSS, Yes - D42, PB3, -, -, -, -, 3_SCK, Yes - -.. _maple-ret6-gpio-port-map: - -GPIO Port Pin Map -^^^^^^^^^^^^^^^^^ - -The following table shows what pins are associated with each -:ref:`GPIO port <gpio-ports>`. - -.. csv-table:: - :header: GPIOA, GPIOB, GPIOC - - PA0: D2, PB0: D27, PC0: D15 - PA1: D3, PB1: D28, PC1: D16 - PA2: D1, PB2: -, PC2: D17 - PA3: D0, PB3: D42, PC3: D18 - PA4: D10, PB4: D43, PC4: D19 - PA5: D13, PB5: D4, PC5: D20 - PA6: D12, PB6: D5, PC6: D35 - PA7: D11, PB7: D9, PC7: D36 - PA8: D6, PB8: D14, PC8: D37 - PA9: D7, PB9: D24, PC9: D38 - PA10: D8, PB10: D29, PC10: D26 - PA11: -, PB11: D30, PC11: - - PA12: -, PB12: D31, PC12: - - PA13: D39, PB13: D32, PC13: D21 - PA14: D40, PB14: D33, PC14: D22 - PA15: D41, PB15: D34, PC15: D23 - -.. _maple-ret6-timer-map: - -Timer Pin Map -^^^^^^^^^^^^^ - -The following table shows what pins are associated with a particular -timer's capture/compare channels. Note that timer 5's channels share -pins with timer 2 (e.g., timer 5 channel 1 is also available on D2, -channel 2 on D3, etc.). - -.. csv-table:: - :header: Timer, Ch. 1, Ch. 2, Ch. 3, Ch. 4 - :delim: | - - 1 | D6 | D7 | D8 | - - 2 | D2 | D3 | D1 | D0 - 3 | D12 | D11 | D27 | D28 - 4 | D5 | D9 | D14 | D24 - 8 | D35 | D36 | D37 | :ref:`D38 <maple-ret6-but>` - -.. _maple-ret6-exti-map: - -EXTI Line Pin Map -^^^^^^^^^^^^^^^^^ - -The following table shows which pins connect to which :ref:`EXTI lines -<external-interrupts-exti-line>` on the Maple RET6 Edition. - -.. list-table:: - :widths: 1 1 - :header-rows: 1 - - * - EXTI Line - - Pins - * - EXTI0 - - 2, 15, 27 - * - EXTI1 - - 3, 16, 28 - * - EXTI2 - - 1, 17, 25 - * - EXTI3 - - 0, 18, 42 - * - EXTI4 - - 10, 19 - * - EXTI5 - - 4, 13, 20 - * - EXTI6 - - 5, 12, 35 - * - EXTI7 - - 9, 11, 36 - * - EXTI8 - - 6, 14, 37 - * - EXTI9 - - 7, 25, 28 - * - EXTI10 - - 8, 26, 29 - * - EXTI11 - - 30 - * - EXTI12 - - 31 - * - EXTI13 - - 21, 32, 39 - * - EXTI14 - - 22, 33, 40 - * - EXTI15 - - 23, 34, 41 - -.. _maple-ret6-usart-map: - -USART Pin Map -^^^^^^^^^^^^^ - -The Maple RET6 Edition has three serial ports whose pins are broken -out to headers (also known as :ref:`USARTs <usart>`). They communicate -using the pins summarized in the following table: - -.. csv-table:: - :header: Serial Port, TX, RX, CK, CTS, RTS - :delim: | - - ``Serial1`` | 7 | 8 | 6 | - | - - ``Serial2`` | 1 | 0 | 10 | 2 | 3 - ``Serial3`` | 29 | 30 | 31 | 32 | 33 - -Unfortunately, :ref:`UART4 and UART5 aren't completely available -<maple-ret6-uarts>`. - -.. _maple-ret6-adc-bank: - -Low-Noise ADC Pins -^^^^^^^^^^^^^^^^^^ - -The six pins at the bottom right of the board (D15—D20) generally -offer lower-noise ADC performance than other pins on the board. If -you’re concerned about getting good ADC readings, we recommend using -one of these pins to take your measurements. More details in the -:ref:`Maple hardware documentation <maple-adc-bank>`. - -Board-Specific Values ---------------------- - -This section lists the Maple RET6 Edition's :ref:`board-specific -values <lang-board-values>`. - -- ``CYCLES_PER_MICROSECOND``: 72 -- ``BOARD_BUTTON_PIN``: 38 -- ``BOARD_LED_PIN``: 13 -- ``BOARD_NR_GPIO_PINS``: 44 (however, :ref:`pin D43 is not usable - <maple-nrst-pb4>`) -- ``BOARD_NR_PWM_PINS``: 18 -- ``boardPWMPins``: 0, 1, 2, 3, 5, 6, 7, 8, 9, 11, 12, 14, 24, 27, 28, - 35, 36, 37 -- ``BOARD_NR_ADC_PINS``: 15 -- ``boardADCPins``: 0, 1, 2, 3, 10, 11, 12, 15, 16, 17, 18, 19, 20, 27, 28 -- ``BOARD_NR_USED_PINS``: 7 -- ``boardUsedPins``: ``BOARD_LED_PIN``, ``BOARD_BUTTON_PIN``, - ``BOARD_JTMS_SWDIO_PIN``, ``BOARD_JTCK_SWCLK_PIN``, - ``BOARD_JTDI_PIN``, ``BOARD_JTDO_PIN``, ``BOARD_NJTRST_PIN`` -- ``BOARD_NR_USARTS``: 3 (unfortunately, :ref:`due to the Maple Rev 5 - design <maple-ret6-uarts>`, UARTs 4 and 5 have pins which are not - broken out). -- ``BOARD_USART1_TX_PIN``: 7 -- ``BOARD_USART1_RX_PIN``: 8 -- ``BOARD_USART2_TX_PIN``: 1 -- ``BOARD_USART2_RX_PIN``: 0 -- ``BOARD_USART3_TX_PIN``: 29 -- ``BOARD_USART3_RX_PIN``: 30 -- ``BOARD_NR_SPI``: 2 (unfortunately, :ref:`due to the Maple Rev 5 - design <maple-ret6-nrst-pb4>`, SPI3 is unavailable). -- ``BOARD_SPI1_NSS_PIN``: 10 -- ``BOARD_SPI1_MOSI_PIN``: 11 -- ``BOARD_SPI1_MISO_PIN``: 12 -- ``BOARD_SPI1_SCK_PIN``: 13 -- ``BOARD_SPI2_NSS_PIN``: 31 -- ``BOARD_SPI2_MOSI_PIN``: 34 -- ``BOARD_SPI2_MISO_PIN``: 33 -- ``BOARD_SPI2_SCK_PIN``: 32 -- ``BOARD_JTMS_SWDIO_PIN``: 39 -- ``BOARD_JTCK_SWCLK_PIN``: 40 -- ``BOARD_JTDI_PIN``: 41 -- ``BOARD_JTDO_PIN``: 42 -- ``BOARD_NJTRST_PIN``: :ref:`43 <maple-ret6-nrst-pb4>` - -.. _maple-ret6-hardware: - -Hardware Design Files ---------------------- - -The hardware schematics and board layout files are available in the -`Maple GitHub repository <https://github.com/leaflabs/maple>`_. Other -than the processor used, the design files for the Maple RET6 edition -are identical to the Maple Rev 5, which are in the ``maple-r5`` -subdirectory of the Maple repository. A schematic for a JTAG adapter -suitable for use with Maple is available in the ``jtagadapter`` -directory. - -From the GitHub repository main page, you can download the entire -repository by clicking the "Download" button. If you are familiar -with `Git <http://git-scm.com/>`_, you can also clone the repository -at the command line with :: - - $ git clone git://github.com/leaflabs/maple.git - -.. _maple-ret6-failure-modes: - -Failure Modes -------------- - -The following known failure modes apply to all Maple boards. The -failure modes aren't design errors, but are easy ways to break or -damage your board permanently. - -* **High voltage on non-tolerant pins**: not all header pins are 5V - compatible; so e.g. connecting certain serial devices in the wrong - way could over-voltage the pins. The :ref:`pin-mapping master table - <maple-ret6-pin-map-master>` details which pins are - :ref:`5V-tolerant <gpio-5v-tolerant>`. - -Errata ------- - -This section lists known issues and warnings for the Maple RET6 -Edition. Some of these are simply due to the RET6 Edition using the -Maple's circuit board, which was not designed to accomodate extra -features only available on the STM32F103RET6. - -.. _maple-ret6-barrel-jack: - -* **Barrel jack power supply voltage mistake**: The silkscreen next to - the barrel jack connector incorrectly indicates that up to an 18 V - input voltage is allowed. **We do not recommend exceeding 12 V**. - - See this :ref:`Maple erratum <maple-barrel-jack>` for more - information. - -* **Power supply marketing mistake**: We originally sold the Maple - RET6 Edition advertising that it was capable of supplying up to 800 - mA; the correct value is 500 mA. - -.. _maple-ret6-uarts: - -* **UART4, UART5 GPIOs unavailable**: Pins related to UARTs 4 and 5 - are not broken out to headers (specifically, PC11/UART4_RX and - PC12/UART5_TX). This is due to the RET6 Edition's board layout - being that of the Maple Rev 5, which was not designed with these - RET6-specific features in mind. - -.. _maple-ret6-dac-ch2: - -* **DAC channel 2 on BOARD_LED_PIN**: The Maple Rev 5 connects PA5 to - the board's built-in LED; this is the same GPIO bit which is - connected to the DAC's channel 2 output. This is also due to the - RET6 Edition's board layout being that of the Maple Rev 5. The DAC - output channel is still available, and (if you use libmaple) its - output is buffered by default, so this may not significantly - interfere with its functionality. - -.. _maple-ret6-nrst-pb4: - -* **Reset and PB4 tied together**: The RET6 Edition's reset line is - also connected to PB4, which is labeled on the silkscreen as pin 43. - Thus, attempting to use pin 43 as a GPIO can reset your board. This - has other implications. Since PB4 is also the JTAG NJTRST line, - this prevents the :ref:`JTAG <jtag>` "reset halt" command from - working properly. Also, since PB4 is SPI3_MISO, the SPI3 peripheral - is not fully usable. - -.. _maple-ret6-sdio: - -* **SDIO lines not broken out**: The RET6 Edition's SDIO peripheral is - not usable, as some of its data lines are either not broken out or - used for other purposes. This is also due to the RET6 Edition's - board layout being that of the Maple Rev 5. - -.. _maple-ret6-adc-led: - -* **ADC on BOARD_LED_PIN**: We originally sold the Maple RET6 Edition - advertising 16 analog input lines. However, one of them (the one on - pin 13) is also connected to the built-in LED. The voltage drop - across the LED means that the analog to digital converter on that - pin is not really useful. While it is still usable, its readings - will be incorrect. - -Recommended Reading -------------------- - -STMicro documentation for STM32F103RE microcontroller: - -* `Datasheet - <http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00191185.pdf>`_ - (PDF); covers STM32F103xC, STM32F103xD, STM32F103xE. -* `Reference Manual RM0008 - <http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/REFERENCE_MANUAL/CD00171190.pdf>`_ - (PDF); general, definitive resource for STM32F1 line. -* `Programming Manual PM0056 - <http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/PROGRAMMING_MANUAL/CD00228163.pdf>`_ - (PDF); assembly language and register reference. -* `STM32F103RE <http://www.st.com/internet/mcu/product/164485.jsp>`_ - overview page with links to further references. diff --git a/docs/source/hardware/maple.rst b/docs/source/hardware/maple.rst deleted file mode 100644 index 91198f2..0000000 --- a/docs/source/hardware/maple.rst +++ /dev/null @@ -1,572 +0,0 @@ -.. highlight:: sh - -.. _maple: - -Maple -===== - -This page is a general resource for information specific to the Maple. - -.. contents:: Contents - :local: - -.. TODO [dma.rst] Ref to dma.rst in sequel instead of libmaple-dma -.. TODO [nvic.rst] Ref to nvic.rst in sequel - -Technical Specifications ------------------------- - -* MCU: **STM32F103RBT6**, a 32-bit ARM Cortex M3 microprocessor -* Clock Speed: **72 MHz** -* **128 KB Flash** and **20 KB SRAM** -* 43 Digital I/O Pins (:ref:`gpio`) -* 15 **PWM** pins at 16 bit resolution (:ref:`pwm`) -* 15 analog input pins, 12-bit **ADC** resolution (:ref:`adc`) -* 2 **SPI** peripherals (:ref:`spi`) -* 2 **I2C** peripherals (:ref:`i2c`) -* 7 Channels of Direct Memory Access (**DMA**) (:ref:`libmaple-dma`) -* 3 **USART** peripherals (:ref:`usart`) -* One advanced and three general-purpose **timers** (:ref:`timers`) -* Dedicated **USB** port for programming and communications (:ref:`usb`) -* **JTAG** (:ref:`jtag`) -* Nested Vectored Interrupt Controller (NVIC) (including - :ref:`external interrupt <external-interrupts>` on GPIOs) -* Supplies up to 500 mA at 3.3 V, with separate 250 mA digital and - analog regulators for low-noise analog performance -* :ref:`Four layer design <maple-hardware>` -* Support for low power, sleep, and standby modes (<500 μA) -* Operating Voltage: 3.3 V -* Input Voltage (recommended): 4 V — 12 V -* Dimensions: 2.05″ × 2.1″ - -.. _maple-identify-rev: - -Identifying your Rev --------------------- - -We went through three versions ("Revs") of the Maple hardware: Rev 1, -Rev 3, and Rev 5 [#frev2_4]_; Rev 5, the final design, is currently on -sale. The following sections will help you to help you identify your -Rev. - -Rev 5 -^^^^^ - -These boards went on sale in November 2010. They have white buttons -and "r5" in small print near the "LeafLabs Maple" text next to the -"infinity leaf" logo. The Maple Rev 5 repositioned the double header -on the right hand side to better fit 0.1 inch pitch breadboard. This -necessitated the removal of pins 21 and 22 from the double header; -they are still available, but don't have any headers installed on -them. - -.. figure:: /_static/img/maple_rev5.png - :align: center - :alt: Maple Rev 5 - -Rev 3 -^^^^^ - -This batch of boards went on sale beginning in May 2010. They have a -darker red silkscreen and the "infinity leaf" logo. The Maple Rev 3 -was the first version which includes the built-in button, labeled BUT. - -.. figure:: /_static/img/maple_rev3.png - :align: center - :alt: Maple Rev 3 - -Rev 1 -^^^^^ - -A small number of Maple Rev 1 boards went on sale in late 2009. They -have a light red silkscreen and a single pixelated leaf as a logo. - -.. figure:: /_static/img/maple_rev1.png - :align: center - :alt: Maple Rev 1 - -.. _maple-powering: - -Powering the Maple ------------------- - -The Maple's power source is determined by the header to the left of -the "LeafLabs" label on the silkscreen. All versions of the Maple can -be powered from the barrel jack connector, USB, or a LiPo battery. We -ship the Maple with a jumper on the USB selector. In order to power -it off of an alternative source, unplug the Maple, then move the -jumper to the desired selector before reconnecting power. - -You can also power the Maple via the pin labeled "Vin" on the lower -header. This pin feeds into both the digital and analog voltage -regulators. However, don't do this while simultaneously powering the -board from another source, or you could damage it. - -.. warning:: Silkscreens on Maples up through Rev 5s manufactured in - Spring 2011 falsely indicated that the barrel jack could be - supplied by up to 18 V. We recommend a barrel jack input voltage - **no greater than 12 V**. - - See :ref:`this erratum <maple-barrel-jack>` for more information. - -Using the Built-in Battery Charger ----------------------------------- - -Maples Rev 3 and Rev 5 also have a built-in LiPo battery charger. In -order to use it, put a jumper across the CHRG header on the power -selection header and across the USB, or EXT selectors, depending on -whether you're charging the battery via USB cable or barrel jack -connector. The LED labeled CHRG will light up while the battery is -being charged. When the battery is finished charging, the LED labeled -DONE will also light up. - -.. _maple-gpios: - -GPIO Information ----------------- - -The Maple features 38 ready-to-use general purpose input/output (see -:ref:`gpio`) pins for digital input/output, numbered ``D0`` through -``D37``. These numbers correspond to the numeric values next to each -header on the Maple silkscreen. - -.. _maple-ret6-but: - -Pin ``D38`` is the board's :ref:`button pin <lang-board-values-but>`. -It is thus mainly useful as an :ref:`input <lang-pin-levels>`. The -pin will :ref:`read <lang-digitalread>` ``HIGH`` when the :ref:`button -is pressed <lang-isbuttonpressed>`. - -More GPIOs (numbered ``D39``\ --``D42`` on the back of the Maple's -silkscreen) are available if you use the :ref:`lang-disabledebugports` -function; see the :ref:`board-specific debug pin constants -<lang-board-values-debug>` for more information. (See :ref:`this -erratum <maple-nrst-pb4>` for information about the pin numbered -``43`` on the silkscreen). - -.. TODO [0.1.0] silkscreen pictures which expand abbreviations - -.. _maple-pin-map-master: - -Master Pin Map -^^^^^^^^^^^^^^ - -This table shows a summary of the available functionality on every -GPIO pin, by peripheral type. The "5 V?" column documents whether or -not the pin is :ref:`5 volt tolerant <gpio-5v-tolerant>`. - -.. csv-table:: - :header: Pin, :ref:`GPIO <gpio>`, :ref:`ADC <adc>`, :ref:`Timer <timers>`, :ref:`I2C <i2c>`, :ref:`UART <usart>`, :ref:`SPI <spi>`, 5 V? - - D0, PA3, CH3, 2_CH4, -, 2_RX, -, - - D1, PA2, CH2, 2_CH3, -, 2_TX, -, - - D2, PA0, CH0, 2_CH1_ETR, -, 2_CTS, -, - - D3, PA1, CH1, 2_CH2, -, 2_RTS, -, - - D4, PB5, -, -, 1_SMBA, -, -, - - D5, PB6, -, 4_CH1, 1_SCL, -, -, Yes - D6, PA8, -, 1_CH1, -, 1_CK, -, Yes - D7, PA9, -, 1_CH2, -, 1_TX, -, Yes - D8, PA10, -, 1_CH3, -, 1_RX, -, Yes - D9, PB7, -, 4_CH2, 1_SDA, -, -, Yes - D10, PA4, CH4, -, -, 2_CK, 1_NSS, - - D11, PA7, CH7, 3_CH2, -, -, 1_MOSI, - - D12, PA6, CH6, 3_CH1, -, -, 1_MISO, - - D13, PA5, CH5, -, -, -, 1_SCK, - - D14, PB8, -, 4_CH3, -, -, -, Yes - D15, PC0, CH10, -, -, -, -, - - D16, PC1, CH11, -, -, -, -, - - D17, PC2, CH12, -, -, -, -, - - D18, PC3, CH13, -, -, -, -, - - D19, PC4, CH14, -, -, -, -, - - D20, PC5, CH15, -, -, -, -, - - D21, PC13, -, -, -, -, -, - - D22, PC14, -, -, -, -, -, - - D23, PC15, -, -, -, -, -, - - D24, PB9, -, 4_CH4, -, -, -, Yes - D25, PD2, -, 3_ETR, -, -, -, Yes - D26, PC10, -, -, -, -, -, Yes - D27, PB0, CH8, 3_CH3, -, -, -, - - D28, PB1, CH9, 3_CH4, -, -, -, - - D29, PB10, -, -, 2_SCL, 3_TX, -, Yes - D30, PB11, -, -, 2_SDA, 3_RX, -, Yes - D31, PB12, -, -, 2_SMBA, 3_CK, 2_NSS, Yes - D32, PB13, -, -, -, 3_CTS, 2_SCK, Yes - D33, PB14, -, -, -, 3_RTS, 2_MISO, Yes - D34, PB15, -, -, -, -, 2_MOSI, Yes - D35, PC6, -, -, -, -, -, Yes - D36, PC7, -, -, -, -, -, Yes - D37, PC8, -, -, -, -, -, Yes - D38, PC9, -, -, -, -, -, Yes - D39, PA13, -, -, -, -, -, Yes - D40, PA14, -, -, -, -, -, Yes - D41, PA15, -, -, -, -, -, Yes - D42, PB3, -, -, -, -, -, Yes - -.. _maple-gpio-port-map: - -GPIO Port Pin Map -^^^^^^^^^^^^^^^^^ - -The following table shows what pins are associated with each -:ref:`GPIO port <gpio-ports>`. - -.. csv-table:: - :header: GPIOA, GPIOB, GPIOC - - PA0: D2, PB0: D27, PC0: D15 - PA1: D3, PB1: D28, PC1: D16 - PA2: D1, PB2: -, PC2: D17 - PA3: D0, PB3: D42, PC3: D18 - PA4: D10, PB4: D43, PC4: D19 - PA5: D13, PB5: D4, PC5: D20 - PA6: D12, PB6: D5, PC6: D35 - PA7: D11, PB7: D9, PC7: D36 - PA8: D6, PB8: D14, PC8: D37 - PA9: D7, PB9: D24, PC9: D38 - PA10: D8, PB10: D29, PC10: D26 - PA11: -, PB11: D30, PC11: - - PA12: -, PB12: D31, PC12: - - PA13: D39, PB13: D32, PC13: D21 - PA14: D40, PB14: D33, PC14: D22 - PA15: D41, PB15: D34, PC15: D23 - -.. _maple-timer-map: - -Timer Pin Map -^^^^^^^^^^^^^ - -The following table shows what pins are associated with a particular -timer's capture/compare channels. - -.. csv-table:: - :header: Timer, Ch. 1, Ch. 2, Ch. 3, Ch. 4 - :delim: | - - 1 | D6 | D7 | D8 | - - 2 | D2 | D3 | D1 | D0 - 3 | D12 | D11 | D27 | D28 - 4 | D5 | D9 | D14 | D24 - -.. _maple-exti-map: - -EXTI Line Pin Map -^^^^^^^^^^^^^^^^^ - -The following table shows which pins connect to which :ref:`EXTI lines -<external-interrupts-exti-line>` on the Maple. - -.. list-table:: - :widths: 1 1 - :header-rows: 1 - - * - EXTI Line - - Pins - * - EXTI0 - - 2, 15, 27 - * - EXTI1 - - 3, 16, 28 - * - EXTI2 - - 1, 17, 25 - * - EXTI3 - - 0, 18, 42 - * - EXTI4 - - 10, 19 - * - EXTI5 - - 4, 13, 20 - * - EXTI6 - - 5, 12, 35 - * - EXTI7 - - 9, 11, 36 - * - EXTI8 - - 6, 14, 37 - * - EXTI9 - - 7, 25, 28 - * - EXTI10 - - 8, 26, 29 - * - EXTI11 - - 30 - * - EXTI12 - - 31 - * - EXTI13 - - 21, 32, 39 - * - EXTI14 - - 22, 33, 40 - * - EXTI15 - - 23, 34, 41 - -.. _maple-usart-map: - -USART Pin Map -^^^^^^^^^^^^^ - -The Maple has three serial ports (also known as USARTs): ``Serial1``, -``Serial2``, and ``Serial3``. They communicate using the pins -summarized in the following table: - -.. csv-table:: - :header: Serial Port, TX, RX, CK, CTS, RTS - :delim: | - - ``Serial1`` | 7 | 8 | 6 | - | - - ``Serial2`` | 1 | 0 | 10 | 2 | 3 - ``Serial3`` | 29 | 30 | 31 | 32 | 33 - -.. _maple-adc-bank: - -Low-Noise ADC Pins -^^^^^^^^^^^^^^^^^^ - -The six pins at the bottom right of the board (D15—D20) generally -offer lower-noise ADC performance than other pins on the board. If -you’re concerned about getting good ADC readings, we recommend using -one of these pins to take your measurements. - -Maple has an electrically isolated analog power plane with its own -regulator, and a geometrically isolated ground plane. Pins D15—D20 are -laid out to correspond with these analog planes, and our measurements -indicate that they generally have the lowest noise of all the analog -lines. However, analog performance may vary depending upon the -activity of the other GPIOs. Consult the :ref:`Maple hardware design -files <maple-hardware>` for more details. - -Board-Specific Values ---------------------- - -This section lists the Maple's :ref:`board-specific values -<lang-board-values>`. - -- ``CYCLES_PER_MICROSECOND``: 72 -- ``BOARD_BUTTON_PIN``: 38 -- ``BOARD_LED_PIN``: 13 -- ``BOARD_NR_GPIO_PINS``: 44 (however, :ref:`pin D43 is not usable - <maple-nrst-pb4>`) -- ``BOARD_NR_PWM_PINS``: 15 -- ``boardPWMPins``: 0, 1, 2, 3, 5, 6, 7, 8, 9, 11, 12, 14, 24, 27, 28 -- ``BOARD_NR_ADC_PINS``: 15 -- ``boardADCPins``: 0, 1, 2, 3, 10, 11, 12, 15, 16, 17, 18, 19, 20, 27, 28 -- ``BOARD_NR_USED_PINS``: 7 -- ``boardUsedPins``: ``BOARD_LED_PIN``, ``BOARD_BUTTON_PIN``, - ``BOARD_JTMS_SWDIO_PIN``, ``BOARD_JTCK_SWCLK_PIN``, - ``BOARD_JTDI_PIN``, ``BOARD_JTDO_PIN``, ``BOARD_NJTRST_PIN`` -- ``BOARD_NR_USARTS``: 3 -- ``BOARD_USART1_TX_PIN``: 7 -- ``BOARD_USART1_RX_PIN``: 8 -- ``BOARD_USART2_TX_PIN``: 1 -- ``BOARD_USART2_RX_PIN``: 0 -- ``BOARD_USART3_TX_PIN``: 29 -- ``BOARD_USART3_RX_PIN``: 30 -- ``BOARD_NR_SPI``: 2 -- ``BOARD_SPI1_NSS_PIN``: 10 -- ``BOARD_SPI1_MOSI_PIN``: 11 -- ``BOARD_SPI1_MISO_PIN``: 12 -- ``BOARD_SPI1_SCK_PIN``: 13 -- ``BOARD_SPI2_NSS_PIN``: 31 -- ``BOARD_SPI2_MOSI_PIN``: 34 -- ``BOARD_SPI2_MISO_PIN``: 33 -- ``BOARD_SPI2_SCK_PIN``: 32 -- ``BOARD_JTMS_SWDIO_PIN``: 39 -- ``BOARD_JTCK_SWCLK_PIN``: 40 -- ``BOARD_JTDI_PIN``: 41 -- ``BOARD_JTDO_PIN``: 42 -- ``BOARD_NJTRST_PIN``: :ref:`43 <maple-nrst-pb4>` - -.. _maple-hardware: - -Hardware Design Files ---------------------- - -The hardware schematics and board layout files are available in the -`Maple GitHub repository <https://github.com/leaflabs/maple>`_. The -design files for Rev 1, Rev 3, and Rev 5 are respectively in the -``maple-r1``, ``maple-r3``, and ``maple-r5`` subdirectories. A -schematic for a JTAG adapter suitable for use with Maple is available -in the ``jtagadapter`` directory. - -From the GitHub repository main page, you can download the entire -repository by clicking the "Download" button. If you are familiar -with `Git <http://git-scm.com/>`_, you can also clone the repository -at the command line with :: - - $ git clone git://github.com/leaflabs/maple.git - -.. _maple-failure-modes: - -Failure Modes -------------- - -The following are known failure modes. The failure modes aren't -design errors, but are easy ways to break or damage your board -permanently. - -* **High voltage on non-tolerant pins**: not all header pins are 5V - compatible; so e.g. connecting certain serial devices in the wrong - way could over-voltage the pins. The :ref:`pin-mapping master table - <maple-pin-map-master>` details which pins are :ref:`5 V tolerant - <gpio-5v-tolerant>`. - -Errata ------- - -This section documents design flaws and other errors. - -General -^^^^^^^ - -.. _maple-barrel-jack: - -* **Barrel jack power supply voltage mistake**: The acceptable voltage - range given next to the barrel jack on the Maple through Rev 5s - manufactured in Spring 2011 is **incorrect**. The given range is 7 - V — 18 V. In fact, **18 V is too high** and should not be supplied - to your board. The recommended maximum voltage you should apply is - **12 V**. - - The original voltage regulators used on the Maple were rated up to - 18 V. However, the voltage regulators on current Maple Revs are - rated up to 16 V. Our tests indicate that they operate correctly - through 12 V. We do not recommend higher input voltages. - -.. _maple-nrst-pb4: - -* **Reset and PB4 tied together**: The Maple's reset line is also - connected to PB4, which is labeled on the silkscreen as pin 43. - Thus, attempting to use pin 43 as a GPIO can reset your board. This - has other implications. Since PB4 is also the JTAG NJTRST line, - this prevents the :ref:`JTAG <jtag>` "reset halt" command from - working properly. - -.. _maple-power-supply: - -* **Power supply marketing mistake**: We originally sold the Maple - advertising that it was capable of supplying up to 800 mA; the - correct value is 500 mA. - -.. _maple-pwm-marketing: - -* **PWM marketing mistake**: We originally advertised the Maple as - having 22 PWM-capable pins; the correct number is 15. - -.. _maple-adc-marketing: - -* **ADC marketing mistake**: We originally advertised the Maple as - having 16 analog input pins. Due to :ref:`the following issue - <maple-adc-led>`, the correct number is 15. - -.. _maple-adc-led: - -* **ADC on BOARD_LED_PIN**: We originally sold the Maple RET6 Edition - advertising 16 analog input lines. However, one of them (the one on - pin 13) is also connected to the built-in LED. The voltage drop - across the LED means that the analog to digital converter on that - pin is not really useful. While it is still usable, its readings - will be incorrect. - - -By Rev -^^^^^^ - -The following subsections lists known issues and warnings for each -revision of the Maple board. - -Rev 5 -~~~~~ - -* **Pin 3 AIN missing**: Pin 3 is capable of analog input, but on Rev - 5s manufactured during Fall 2010, the corresponding "AIN" is missing - from its silkscreen. This mistake was fixed in later manufacturing - runs. - -Rev 3 -~~~~~ - -* **Pin 3 AIN missing**: Pin 3 is capable of analog input, but the - corresponding "AIN" is missing from the Rev 3 silkscreen. - -.. _maple-rev3-bad-buttons: - -* **Bad/Sticky Buttons**: a number of Rev 3 boards sold in May-June 2010 - have questionable RESET and BUT buttons. - - What seems to have happened is that the flux remover we used to - clean the boards before shipping eroded the plastic internals, which - resulted in intermittent functionality. All buttons on all shipped - boards did function in testing, but some may have been unreliable in - regular use. - - If you have this problem, we will be happy to ship you new buttons - if you think you can re-solder them yourself, or you can ship us - your board and we will swap out that part. - - For reference, the button part number is KMR211GLFS and the flux - remover we used is "Precision Electronics Cleaner" from RadioShack, - which is "Safe on most plastics" and contains Dipropylene glycol - monomethyl ether, hydrotreated heavy naphtha, dipropylene glycol - methyl ether acetate, and carbon dioxide. - -* **Resistors on pins 0 and 1**: these header pins, which are RX/TX on - USART2 (:ref:`Serial2 <lang-serial>`), have resistors in-line - between the STM32 and the headers. These resistors increase the - impedance of the lines for ADC reads and affect the open drain GPIO - functionality of the pins. - - These resistors were accidentally copied over from older Arduino USB - designs, where they appear to protect the USB-Serial converter from - TTL voltage on the headers. - -* **Silkscreen Errors**: the silkscreen on the bottom indicated PWM - functionality on pin 25 and listen the external header GND pin as - number 38 (actually 38 is connected to the BUT button). We manually - sharpied over both of these mistakes. - -Rev 1 -~~~~~ - -* **ADC noise**: generally very high, in particular when the USB port - is being used for communications (including keep-alive pings when - connected to a computer). - - This issue was resolved in Rev 3 with a 4-layer design and a - :ref:`geometrically isolated ADC Vref plane <maple-adc-bank>`. - -* **Resistors on pins 0 and 1**: these header pins, which are RX/TX on - USART2 (:ref:`Serial2 <lang-serial>`), have resistors in-line - between the STM32 and the headers. These resistors increase the - impedance of the lines for ADC reads and affect the open drain GPIO - functionality of the pins. - - These resistors were accidentally copied over from older Arduino USB - designs, where they appear to protect the USB-Serial converter from - TTL voltage on the headers. - -* **Silkscreen Differences**: the pin numbering scheme on Rev 1 is - different from Rev 3, and thus Rev 3 software is difficult to use - with Rev 1 boards. Notably, the analog input bank is labeled A0-A4 - on Rev 1 but 15-20 on Rev 3, and the extra header bank does not have - a pinout table on the bottom. - -* **No BUT Button**: the BUT button, useful for serial bootloading, - was only added in Rev 3. As a workaround, you can directly short the - appropriate MCU pin to Vcc; see `this forum posting - <http://forums.leaflabs.com/topic.php?id=32#post-126>`_. - -Recommended Reading -------------------- - -STMicro documentation for STM32F103RB microcontroller: - -* `Datasheet - <http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00161566.pdf>`_ - (PDF); covers STM32F103x8, STM32F103xB. -* `Reference Manual RM0008 - <http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/REFERENCE_MANUAL/CD00171190.pdf>`_ - (PDF); general, definitive resource for STM32F1 line. -* `Programming Manual PM0056 - <http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/PROGRAMMING_MANUAL/CD00228163.pdf>`_ - (PDF); assembly language and register reference. -* `STM32F103RB <http://www.st.com/internet/mcu/product/164487.jsp>`_ - overview page with links to further references. - -.. rubric:: Footnotes - -.. [#frev2_4] Revs 2 and 4 were prototypes that didn't pass internal - testing. |