| Overview |
| ======== |
| The sema4 uboot example shows how to use SEMA4 driver to lock and unlock a sema gate, |
| the notification IRQ is also demonstrated in this example. |
| This example should work together with uboot. This example runs on Cortex-M core, |
| the uboot runs on the Cortex-A core. |
| |
| Toolchain supported |
| =================== |
| - IAR embedded Workbench 8.50.1 |
| - GCC ARM Embedded 9.2.1 |
| |
| Hardware requirements |
| ===================== |
| - Micro USB cable |
| - MIMX8MQ6-EVK board |
| - J-Link Debug Probe |
| - SD card with uboot |
| - 12V power supply |
| - Personal Computer |
| |
| Board settings |
| ============== |
| No special settings are required. |
| |
| Prepare the Demo |
| ================ |
| 1. Prepare an SD card with the prebuilt U-Boot image. Then, insert the SD card to the target board. |
| 2. Connect a USB cable between the host PC and the J1701 USB port on the target board. |
| 3. Connect 12V power supply and J-Link Debug Probe to the board, switch SW701 to power on the board |
| 4. Open a serial terminal with the following settings: |
| - 115200 baud rate |
| - 8 data bits |
| - No parity |
| - One stop bit |
| - No flow control |
| 4. Download the program to the target board. |
| 5. Launch the debugger in your IDE to begin running the demo. |
| |
| Running the demo |
| ================ |
| Follow the output log, lock and unlock the sema4 gate in uboot. The whole log: |
| ~~~~~~~~~~~~~~~~~~~ |
| SEMA4 uboot example start |
| Lock sema4 gate in uboot using: |
| > mw.b 0x30ac0000 1 1 |
| Unlock sema4 gate in uboot using: |
| > mw.b 0x30ac0000 0 1 |
| SEMA4 uboot example success |
| ~~~~~~~~~~~~~~~~~~~ |
| Customization options |
| ===================== |
| |
