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1. Article purpose[edit | edit source]
The purpose of this article is to briefly describe, for the STM32MP157C-EV1 Evaluation board:
- How to assemble together the different elements provided in the commercial box
- What are the different components present on the boards
- How to connect the boards to external material
- How to configure the board for boot
- How to select RS232 UART or ST-Link connectors
- What are the configurations of the connectors pins
Template:ReviewsComments This article is only an introduction to the STM32MP157C-EV1 Evaluation board: further information can be found in the STM32MP157C-EV1 user manual.
2. Board assembly[edit | edit source]
The STM32MP15 Evaluation board package (STM32MP157C-EV1) includes all the items listed below.
| Position | Description |
|---|---|
| 1 | MB1262 motherboard |
| 2 | MB1263 daughterboard |
| 3 | MB1230 DSI 720p display |
| 4 | MB1379 daughterboard camera |
| 5 | microSD card |
| 6 | Power supply block (5V, 3A) |
The following figures explain how to assemble these different items to get the STM32MP15 Evaluation board.
Board name: STM32MP157C-EV1
Board name: STM32MP157C-EV1
3. Board overview[edit | edit source]
| Position | Description |
|---|---|
| 1 | MB1262 motherboard |
| 2 | MB1263 daughterboard |
| 3 | MB1230 DSI 720p display |
| 4 | MB1379 daughterboard camera |
| 5 | microSD card |
Board name: STM32MP157C-EV1
| Position | Description |
|---|---|
| 50 (B1) | Reset button |
| 51 (LD2) | User LED (red)[1] |
| 52 (B2) | User button (PA13) |
| 53 (LD3) | User LED (green))[1] |
| 54 (B3) | User button (PA14) |
| 55 (LD5) | User LED (blue))[1] |
| 56 (LD4) | User LED (orange))[1] |
| 57 (B4) | Wakeup button |
| 58 (LD1) | Power LED (green)[2] |
| 59 (CN1) | MB1263 power 5V-3A |
| 60 (SW1) | Boot mode selection |
| 61 (U3) | PMIC (STPMIC1A) |
| 62 (LD6) | ST-Link LED (bicolor)[3] |
| 63 (CN4) | USB micro-B (ST-Link V2-1) |
| 64 (U4) | STM32MP157 18x18 |
| 65 (U5) | eMMC |
| 66 (U6/U7) | 2 x DDR3L 16 bits |
| 67 (µSD) | microSD 3.0 card (back side slot) |
| Position | Description | Position | Description |
|---|---|---|---|
| 10 (CN3) | Ethernet | 11 (CN8) | Microphone MEMS daughterboard connector |
| 12 (CN4) | Speaker audio output | 13 (CN5) | Headset audio output |
| 14 (U8) | Audio codec (Wolfson WM8994) | 15 (CN1) | SPDIF RX (input) |
| 16 (CN2) | SPDIF TX (output) | 17 (U5) | SmartCard (back side slot) |
| 18 (LD1) | Ethernet LED (green)[4] | 19 (CN6) | Ethernet daughterboard connector |
| 20 (U10) | Trace connector | 21 (CN11) | LTDC connector |
| 22 (CN12) | RS232 (UART4) | 23 (CN13) | External E2P connector |
| 24 (CN16) | USB micro-AB (OTG) | 25 (LD2) | USB OTG LED (green)[5] |
| 26 (LD3) | USB Type-A LED (red)[6] | 27 (CN17) | MFX header 4 pins |
| 28 (CN14) | JTAG connector | 29 (CN15) | CAN FD |
| 30 (CN18) | 2 USB Type-A (host) | 31 (CN20) | 2 USB Type-A (host) |
| 32 (B2) | Reset button | 33 (B1) | Joystick |
| 34 (CN22) | Motor control connector | 35 (CN21) | GPIO expansion connector |
| 4 (CN7) | Camera sensor connector |
Details about some LEDs:
- ↑ Jump up to: 1.0 1.1 1.2 1.3 LD2, LD3, LD4, LD5 (MB1263): 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
- ↑ LD1 (MB1263): turns green if power connection established
- ↑ LD6 (MB1263): flashes red if ST-Link connection not established, else green
- ↑ LD1 (MB1262): flashes green when Ethernet connection established
- ↑ LD2 (MB1262): turns green when USB OTG connection established
- ↑ LD3 (MB1262): 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 STM32MP157C-EV1 Evaluation board. As shown in the board overview, other connectors are available for this board (for example CAN).
5. Switches and jumpers[edit | edit source]
Most of default settings of the switches and jumpers shall be kept as set in the commercial box.
There are 3 main exceptions:
- the jumpers related to UART4
- the switches related to boot
- the jumper JP1 that must be removed
The picture and sections below detail the main boot switches and the UART4 jumpers.
[edit | edit source]
The STM32MP157 Evaluation board can boot from different Flash devices (microSD, eMMC...); using the microSD card is recommended.
| Boot mode | Boot 2 | Boot 1 | Boot 0 |
|---|---|---|---|
| Engineering boot | 1 | 0 | 0 |
| NOR | 0 | 0 | 1 |
| microSD card | 1 | 0 | 1 |
| eMMC | 0 | 1 | 0 |
| NAND | 0 | 1 | 1 |
| Forced USB boot for flashing |
0 | 0 | 0 |
The boot related switches (SW1 on the board overview picture) must be configured as illustrated by one of the following pictures:
File:STM32MP157C-EV1 boot switches engineering mode.png Engineering boot |
File:STM32MP157C-EV1 boot switches NOR.png Boot from NOR |
File:STM32MP157C-EV1 boot switches microSD card.png Boot from microSD card |
File:STM32MP157C-EV1 boot switches eMMC.png Boot from eMMC |
File:STM32MP157C-EV1 boot switches NAND.png Boot from NAND |
File:STM32MP157C-EV1 boot switches forced USB.png Forced USB boot for flashing |
[edit | edit source]
The UART4 is shared exclusively between 2 connectors:
- RS232, D-type, 9-pin connector (CN12 on the board overview picture), dedicated to communication through RS232,
- USB micro-B (ST-Link V2-1) (CN4 on the board overview picture), dedicated to the RS232 of ST-Link V2-1 controller
The connection is switched by setting JP4 and JP5 jumpers as shown in following pictures:
File:STM32MP157C-EV1 JP4 JP5 UART4 on DB9 CN12.png UART4 is connected to the RS232, D-type, 9-pins CN12 connector |
File:STM32MP157C-EV1 JP4 JP5 UART4 on ST-Link V2-1 CN4.png UART4 is connected to the USB micro-B ST-Link V2-1 CN4 connector |
6. GPIO mapping[edit | edit source]
6.1. Motor control connector[edit | edit source]
The pins of the motor control connector (CN22 on the board overview picture) are described in the following table: Template:Warning
| Description | Pin number | Pin number | Description |
|---|---|---|---|
| Emergency Stop | 1 | 2 | GND |
| MC_UH | 3 | 4 | GND |
| MC_UL | 5 | 6 | GND |
| MC_VH | 7 | 8 | GND |
| MC_VL | 9 | 10 | GND |
| MC_WH | 11 | 12 | GND |
| MC_WL | 13 | 14 | Bus Voltage |
| Current A | 15 | 16 | GND |
| Current B | 17 | 18 | GND |
| Current C | 19 | 20 | GND |
| NTC ByPass relay | 21 | 22 | GND |
| Dissipative Brake | 23 | 24 | GND |
| 5V Power | 25 | 26 | Heatsink Temperature |
| PFC Sync | 27 | 28 | Vdd_Micro |
| PFC PWM | 29 | 30 | GND |
| Encoder A | 31 | 32 | GND |
| Encoder B | 33 | 34 | Encoder Index |
6.2. GPIO expansion connector[edit | edit source]
The pins of the GPIO expansion connector (CN21 on the board overview picture) are described in the following table: Template:Warning
| 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 |
| SPI1_MOSI | 19 | 20 | GND |
| SPI1_MISO | 21 | 22 | SDMMC3_D1 |
| SPI1_SCK | 23 | 24 | SPI1_NSS |
| GND | 25 | 26 | RPI_GPIO7 |
| ID_SD | 27 | 28 | ID_SC |
| MCO2 | 29 | 30 | GND |
| TIM2_CH4 | 31 | 32 | TIM12_CH1 |
| TIM8_CH4 | 33 | 34 | GND |
| SAI2_FSA | 35 | 36 | USART3_CTS |
| SDMMC3_D2 | 37 | 38 | SAI2_SDA |
| GND | 39 | 40 | SAI2_SDB |
6.3. JTAG connector[edit | edit source]
The pins of the JTAG connector (CN14 on the board overview picture) are described in the following table:
| Description | Pin number | Pin number | Description |
|---|---|---|---|
| VDD | 1 | 2 | VDD |
| TRST | 3 | 4 | GND |
| TDI | 5 | 6 | GND |
| TMS | 7 | 8 | GND |
| TCLK | 9 | 10 | GND |
| ------ | 11 | 12 | GND |
| TDO | 13 | 14 | GND |
| RESET | 15 | 16 | GND |
| ------ | 17 | 18 | GND |
| ------ | 19 | 20 | GND |
6.4. 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 LD3 (*) | USER1 (*) | PA14 |
| Template:Red LD2 (*) | USER2 (*) | PA13 |
| Template:Orange LD4 | - | PD8 |
| Template:Blue LD5 | - | PD9 |