CoM Model: Toradex Apalis iMX8 QuadMax 8GB Wi-Fi / BT IT V1.1A
Board : Ixora Carrier Board
dear support team,
I have an issue when running Cortex-M4 and Cortex-A simultaneously. the initial condition I tried was using BSP 7.1.0 and running FreeRTOS_hello example. I followed the following guide freertos-on-the-cortex-m4-of-an-apalis-imx8 to run FreeRTOS and hello-world-cortexM to customize devicetree overlays for imx8. Then I setup u-boot to run cortex-m4_1 automatically (because on the ixora board only uart on core 1 is supported by default).
but there is no error at all during booting but there is inconsistency when booting. sometimes when rebooted cortex-A can boot immediately and the most common case is infinite booting. In both cases, the Cortex-M stops operating when cortex-A boots and the kernel repeats booting at the position like the following message (most cases).
loop_booting_when_load_M4 (71.2 KB)
and the following image is the condition of the Cortex-M4_1 serial repeating the counting I did with a 200ms delay
is there any issue related to load cortex-M4 in BSP 7? or for imx8qm it can only run in BSP 5 like the source I read below?
apalis-imx8qm-rpmsg-issue-on-bsp-5-0
but after I tried BSP 5.7.6, I also still have problems with adding overlays. whereas in BSP 7 it works fine.
Applying Overlay: apalis-imx8_M4-Core-0_UART_overlay.dtbo
1543 bytes read in 21 ms (71.3 KiB/s)
Applying Overlay: apalis-imx8_M4-Core-1_UART_overlay.dtbo
593 bytes read in 23 ms (24.4 KiB/s)
failed on fdt_overlay_apply(): FDT_ERR_NOTFOUND
10432345 bytes read in 327 ms (30.4 MiB/s)
Uncompressed size: 24695296 = 0x178D200
Bootargs: pci=nomsi root=PARTUUID=59ccb610-02 ro rootwait
ERROR: Did not find a cmdline Flattened Device Tree
FDT and ATAGS support not compiled in - hanging
### ERROR ### Please RESET the board ###
and here I attach the device tree overlays that I use
- Core 0
/dts-v1/;
/plugin/;
/* Disable UART1 Control Pins to use M4 Core 0 and 1 UART */
/ {
compatible = "toradex,apalis-imx8";
};
&iomuxc {
pinctrl-0 = <&pinctrl_cam1_gpios>, <&pinctrl_dap1_gpios>,
<&pinctrl_esai0_gpios>, <&pinctrl_fec2_gpios>,
<&pinctrl_gpio3>, <&pinctrl_gpio4>, <&pinctrl_gpio_keys>,
<&pinctrl_gpio_usbh_oc_n>,
<&pinctrl_lvds0_i2c0_gpio>, <&pinctrl_lvds1_i2c0_gpios>,
<&pinctrl_mipi_dsi_0_1_en>, <&pinctrl_mipi_dsi1_gpios>,
<&pinctrl_mlb_gpios>, <&pinctrl_qspi1a_gpios>,
<&pinctrl_sata1_act>, <&pinctrl_sim0_gpios>,
<&pinctrl_usdhc1_gpios>;
};
- Core 1
/dts-v1/;
/plugin/;
/* Disable PWM0 and PMW1 to use M4 Core 1 UART */
/ {
compatible = "toradex,apalis-imx8-v1.1-eval",
"toradex,apalis-imx8-eval",
"toradex,apalis-imx8",
"fsl,imx8qm";
};
&lsio_pwm0 {
status = "disabled";
};
&lsio_pwm1 {
status = "disabled";
};
&lpuart2 {
status = "disabled";
};
apalis-imx8_M4-Core-1_UART_overlay.dts (357 Bytes)
apalis-imx8_M4-Core-0_UART_overlay.dts (664 Bytes)
Best Regards,
Azka
