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1. Article purpose[edit | edit source]
This article provides an overview of STM32MP157X_DKX Discovery kits. It briefly describes:
- how to assemble the different elements provided in the commercial box
- what are the different components present on the board
- how to connect the board to external material
- how to configure the board for boot
- what are the configurations of the connector pins
Template:ReviewsComments This article is only an introduction to the STM32MP157X_DKX Discovery kits. Detailed information can be found in the STM32MP157X-DKX user manual.
2. Board assembly[edit | edit source]
The STM32MP15 Discovery kit packages (STM32MP157X-DKX) include the items listed below.
Please note that;
- the STM32MP157X-DK1 Discovery kit neither includes the "WLAN + Bluetooth" component (muRata LBEE5KL1DX), nor the MB1407 daughterboard DSI display
- the STM32MP157X-DK2 Discovery kit includes the "WLAN + Bluetooth" component (muRata LBEE5KL1DX), and the MB1407 daughterboard DSI display
The different variants corresponding to STM32MP157X-DK1/2 are explained by the part number codification.
| Position | Description |
|---|---|
| 1 | MB1272 motherboard ("WLAN + Bluetooth" component included only for the STM32MP157X-DK2 Discovery kit) |
| 2 | MB1407 daughterboard DSI display (480x800 pixels): only for the STM32MP157X-DK2 Discovery kit |
| 3 | microSD card |
| 4 | DSI ribbon cable: only for the STM32MP157X-DK2 Discovery kit |
| 5 | Spacer for DSI display daughterboard: only for the STM32MP157X-DK2 Discovery kit |
| 6 | USB Type-C (power 5V-3A) |
The following figures explain how to assemble the various items to obtain the STM32MP15 Discovery kit.
For STM32MP157X-DK1 kits, the assembly only consists in inserting the microSD card into the dedicated slot (step C in the below figures).
Board name: STM32MP157X-DK2
Board name: STM32MP157X-DK2 (for the STM32MP157X-DK1, the elements 2, 4 and 5 are not present)
3. Board overview[edit | edit source]
| Position | Description |
|---|---|
| 1 | MB1272 motherboard |
| 2 | MB1407 daughterboard DSI display (480x800 pixels): only for the STM32MP157X-DK2 Discovery kit |
| 3 | microSD card |
| 4 | DSI ribbon cable: only for the STM32MP157X-DK2 Discovery kit |
| 5 | Spacer for DSI display daughterboard: only for the STM32MP157X-DK2 Discovery kit |
Board name: STM32MP157X-DK2
| Position | Description |
|---|---|
| 10 (CN1) | 2 USB Type-A (host) |
| 11 (CN5) | 2 USB Type-A (host) |
| 12 (CN7) | USB Type-C (DRP) |
| 13 (CN9) | HDMI connector |
| 14 (LD4) | ST-Link LED (bicolor)[1] |
| 15 (CN11) | USB micro-B (ST-Link V2-1) |
| 16 (LD8) | User LED (blue)[2] |
| 17 (LD7) | User LED (orange)[2] |
| 18 (B4) | User button (USER2) |
| 19 (U13) | STM32MP157X 12x12 |
| 20 (LD6) | User LED (red))[2] |
| 21 (B3) | User button (USER1) |
| 22 (LD5) | User LED (green)[2] |
| 23 (B2) | Reset button |
| 24 (U20) | Audio codec (Cirrus CS42L51) |
| 25 (CN10) | Audio headset |
| 26 (B1) | Power-on button |
| 27 (CN8) | Ethernet |
Board name: STM32MP157X-DK2
| Position | Description |
|---|---|
| 10 (CN1) | 2 USB Type-A (host) |
| 26 (CN8) | Ethernet |
| 30 (LD3) | Ethernet LED (green)[3] |
| 31 (CN6) | USB Type-C (power 5V-3A) |
| 32 (LD2) | Power LED (green)[4] |
| 33 (U8) | WLAN + Bluetooth (muRata LBEE5KL1DX): only for STM32MP157X-DK2 Discovery kit |
| 34 (CN4) | DSI LCD connector |
| 35 (LD1) | USB Type-A LED (red)[5] |
| 36 (CN2) | GPIO expansion |
Board name: STM32MP157X-DK2
| Position | Description |
|---|---|
| 40 (CN13) | Arduino Uno connector (socket 10x1) |
| 41 (CN14) | Arduino Uno connector (socket 8x1) |
| 42 (LD9) | Arduino LED (green) |
| 43 (CN15) | microSD 3.0 card |
| 44 (SW1) | Boot mode selection |
| 45 (CN16) | Arduino Uno connector (socket 8x1) |
| 46 (CN17) | Arduino Uno connector (socket 6x1) |
Details about some LEDs:
- ↑ LD4: flashes red if ST-Link connection not established, else green
- ↑ Jump up to: 2.0 2.1 2.2 2.3 LD5, LD6, LD7, LD8: some user LEDs are used to reflect the system activity, while the others are left free to be used by the application, as explained in LEDs and buttons on STM32 MPU boards article
- ↑ LD3: flashes green when Ethernet connection established
- ↑ LD2: turns green if power connection established
- ↑ LD1: turns red if USB Type-A connection established
4. Board connection[edit | edit source]
The connections shown in the picture below are the ones recommended to start with the STM32MP157X_DKX Discovery kits. As shown in the board overview, other connectors are available for these boards (for example HDMI).
[edit | edit source]
The following table defines the different combination of the boot mode selection switches: Template:Info
| Boot mode | Boot 0 | Boot 1 | Boot 2 |
|---|---|---|---|
| Forced USB boot for flashing |
0 | 0 | 0 |
| Not supported | 1 | 0 | 0 |
| Engineering boot | 0 | 0 | 1 |
| microSD card | 1 | 0 | 1 |
Below the corresponding configurations of the boot related switches (SW1 on the board overview picture):
File:STM32MP157X-DKX boot switches forced USB.png Forced USB boot for flashing |
File:STM32MP157X-DKX boot switches engineering mode.png Engineering boot |
File:STM32MP157X-DKX boot switches microSD card.png Boot from microSD card |
6. GPIO mapping[edit | edit source]
6.1. GPIO expansion connector[edit | edit source]
The pins of the GPIO expansion connector (CN2 on the board overview picture) are described in the following table:
| Description | Pin number | Pin number | Description |
|---|---|---|---|
| 3V3 | 1 | 2 | VIN |
| I2C5_SDA | 3 | 4 | VIN |
| I2C5_SCL | 5 | 6 | GND |
| MCO1 | 7 | 8 | USART3_TX |
| GND | 9 | 10 | USART3_RX |
| USART3_RTS | 11 | 12 | SAI2_SCKA |
| SDMMC3_D3 | 13 | 14 | GND |
| SDMMC3_CK | 15 | 16 | SDMMC3_CMD |
| 3V3 | 17 | 18 | SDMMC3_D0 |
| SPI5_MOSI | 19 | 20 | GND |
| SPI5_MISO | 21 | 22 | SDMMC3_D1 |
| SPI5_SCK | 23 | 24 | SPI5_NSS |
| GND | 25 | 26 | PI_GPIO7 |
| ID_SD | 27 | 28 | ID_SC |
| MCO2 | 29 | 30 | GND |
| TIM5_CH2 | 31 | 32 | TIM4_CH2 |
| TIM3_CH2 | 33 | 34 | GND |
| SAI2_FSA | 35 | 36 | USART3_CTS |
| SDMMC3_D2 | 37 | 38 | SAI2_SDA |
| GND | 39 | 40 | SAI2_SDB |
6.2. Arduino Uno connector[edit | edit source]
The pins of the Arduino Uno connector are described in the following table:
| Arduino Uno connector | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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6.3. User buttons and LEDs[edit | edit source]
The GPIO assignments for the user buttons and LEDs are described in the following table. Refer to LEDs and buttons on STM32 MPU boards article to get information on the functional mapping for each one.
| LED color and label | Button label | GPIO |
|---|---|---|
| Template:Green LD5 (*) | USER1 (*) | PA14 |
| Template:Red LD6 (*) | USER2 (*) | PA13 |
| Template:Orange LD7 | - | PH7 |
| Template:Blue LD8 | - | PD11 |