BSP fails to build for FreeRTOS on a Nios V with UART - BSP fails to build for FreeRTOS on a Nios V with UART I have a Nios V on a Max 10 with a UART (RS-232 Serial Port) Intel FPGA IP (and also JTAG UART). When I opened up the BSP editor, I selected FreeRTOS and went with all the defaults and made a BSP. However, when I try building a bare bones hello world C program, the BSP fails to build. It says that the BSP source file altera_avalon_uart_init.c has OS_FLAG_SET as undeclared, and similarly, it says the BSP file altera_avalon_uart_read.c has OS_FLAG_WAIT_SET_ANY undeclared. Also, altera_avalon_uart_write.c has OS_FLAG_CONSUME undeclared. How do I get the BSP to build? I can use UART with HAL rather than FreeRTOS, and it works fine for the Nios V. (I am using Quartus 23.1 STD.) Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART The reason for the large execution size is due to the sneaky call to printf() in the provided vApplicationStackOverflowHook in FreeRTOS: void vApplicationStackOverflowHook( TaskHandle_t xTask, char *pcTaskName ) { /* To suspress unused argument warning. */ ( void ) xTask; printf("Stack overflow task is %s \r\n",pcTaskName); taskDISABLE_INTERRUPTS(); __asm volatile( "ebreak" ); for( ;; ); } This pulls in large chunks of the standard library and completely bloats the code. Simply disabling the stack overflow check in the BSP is enough to shrink the code size enough to fit in the OCRAM on a MAX10 no problem. I'd suggest removing this and using one of the ALT_LOG functions going forward. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART I've experienced this one as well. The reason is that the do {} while(0) is surrounded by a brace due to the macro expansion in altera_onchip_flash_regs.h You can fix it by modifying each of the macros altera_onchip_flash_regs.h and removing the outermost brackets like so: Old: #define ALTERA_ONCHIP_FLASH_ENABLE_WRITE_AND_ERASE_OPERATION(base) \ ( \ IOWR_ALTERA_ONCHIP_FLASH_CONTROL((base), \ (IORD_ALTERA_ONCHIP_FLASH_CONTROL((base)) \ & \ ~( \ ALTERA_ONCHIP_FLASH_CONTROL_ALLSECTOR_WRITE_PROTECT_MSK | \ ALTERA_ONCHIP_FLASH_CONTROL_PAGE_ERASE_MSK | \ ALTERA_ONCHIP_FLASH_CONTROL_SECTOR_ERASE_MSK \ ) \ ) \ | \ ( \ ALTERA_ONCHIP_FLASH_CONTROL_ALLSECTOR_WRITE_ENABLE | \ ALTERA_ONCHIP_FLASH_CONTROL_PAGE_ERASE_NOT_SET | \ ALTERA_ONCHIP_FLASH_CONTROL_SECTOR_ERASE_NOT_SET \ ) \ ) \ ) Modified: #define ALTERA_ONCHIP_FLASH_ENABLE_WRITE_AND_ERASE_OPERATION(base) \ IOWR_ALTERA_ONCHIP_FLASH_CONTROL((base), \ (IORD_ALTERA_ONCHIP_FLASH_CONTROL((base)) \ & \ ~( \ ALTERA_ONCHIP_FLASH_CONTROL_ALLSECTOR_WRITE_PROTECT_MSK | \ ALTERA_ONCHIP_FLASH_CONTROL_PAGE_ERASE_MSK | \ ALTERA_ONCHIP_FLASH_CONTROL_SECTOR_ERASE_MSK \ ) \ ) \ | \ ( \ ALTERA_ONCHIP_FLASH_CONTROL_ALLSECTOR_WRITE_ENABLE | \ ALTERA_ONCHIP_FLASH_CONTROL_PAGE_ERASE_NOT_SET | \ ALTERA_ONCHIP_FLASH_CONTROL_SECTOR_ERASE_NOT_SET \ ) \ ) \ @EBERLAZARE_I_Intel Can you flag this to be patched as well? And any news on when the UART fix will be submitted? This is affecting me also. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART We're using external flash to do execute in place, and so it doesn't matter to us that the .elf file won't fit on the Max 10 itself. We're still planning on using the Max 10, and given our current design, we have to use FreeRTOS. We think we know what we need to do going forward. Thank you for your help. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Hi, As we do not receive any response from you on the previous question/reply/answer that we have provided. Please login to ‘ https://supporttickets.intel.com’ , view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions. p/s: If any answer from the community or Intel Support are helpful, please feel free to give best answer or rate 4/5 survey. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Hi Andrew, We apologize for any inconvenience. Given this, is it okay to proceed with the Altera HAL with your design? Or do you have other FPGA? Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART In the " freertos/drivers/src/ ": intel_lw_uart_init.c line 228~: if (sp->tx_start == ((sp->tx_end + 1) & ALT_AVALON_UART_BUF_MSK)) { ALT_FLAG_POST (sp->events, ALT_UART_WRITE_RDY, ALT_FLAG_SET ); } intel_lw_uart_read.c line 205~: ALT_FLAG_PEND (sp->events, ALT_UART_READ_RDY, ALT_FLAG_WAIT_SET_ANY_WITH_CONSUME, ALT_FLAG_WAIT_MAX_TIMEOUT ); intel_lw_uart_write.c line 192~: ALT_FLAG_PEND (sp->events, ALT_UART_WRITE_RDY, ALT_FLAG_WAIT_SET_ANY_WITH_CONSUME, ALT_FLAG_WAIT_MAX_TIMEOUT ); Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Let me try to reattach: intel_lw_uart_init.c intel_lw_uart_read.c intel_lw_uart_write.c Again, for MAX 10, making this changes will increase the size of the .elf, and it would not fit the maximum size for MAX 10's OCRAM due to its size. You may continue to use Altera HAL or in the future consider a bigger FPGA. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART I also can't click your images/links. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART all of your links are broken Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Hi, The changes for this error is to change the driver's code "\software\freertos_bsp\drivers\src"and modify the LW_UART HAL API as such (a KDB for this will be published): intel_lw_uart_init.c intel_lw_uart_read.c intel_lw_uart_write.c However, for MAX 10, making this changes will increase the size of the .elf, and it would not fit the maximum size for MAX 10's OCRAM due to its size. Thus we regret to inform you, that MAX 10 cannot support FreeRTOS due to its memory limitation. You may continue with the Altera HAL or in the future consider a bigger FPGA. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Hi, We are still working on a proper fix for this. We will update to you soon. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Hi, We are still working on a patch fix for 23.1 std, I will check again if that will include for 23.1 std lite. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Okay, thank you for looking into it, and yes, please do let me know when you have more info on it. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART The lightweight uart has the same problem. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Hi, Thanks for the feedback, I was able to replicate the issue, I will channel this to our internal team. I will update to you once we have any new info on this. Thank you for your patience. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART "On-Chip Flash Intel FPGA IP" doesnt compile either: In file included from freertos_bsp/drivers/src/altera_onchip_flash.c:32: freertos_bsp/drivers/src/altera_onchip_flash.c: In function 'alt_onchip_flash_erase_block': freertos_bsp/HAL/inc/io.h:126:34: error: expected expression before 'do' 126 | #define SWIO(BASE, OFFSET, DATA) do { \ | ^~ Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Hi, I am a bit caught up on my side, I will try to get the test in the next few days. Thank you for your patience, I shall get back to you soon. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART mailbox_simple doesnt compile either: /projects/c5_nios/software/freertos_bsp/drivers/src/altera_avalon_mailbox_simple.c:36:10: fatal error: nios2.h: No such file or directory 36 | #include "nios2.h" | ^~~~~~~~~ This is FreeRTOS for NiosV Quartus Prime Lite 23.1 Build 991. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Thanks. I'm using Quartus Pime Version 23.1std.0 Build 991 11/28/2023 SC Standard Edition Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Hi, Thanks a lot for the info provided, let me test this on our side. Also, could you provide the Quartus build version? You can find this in the "Help" tab in Quartus. Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Sure, I attached a Quartus archive of an example where the BSP won't build. The C file doesn't have to have any substance to it. The following is fine: // main.c int main() { return 0; } Open the Quartus project using Quartus 23.1 STD, and compile it. Create a BSP: enter a niosv shell and open the BSP editor select the sopcinfo file select FreeRTOS go with all other defaults generate Use the niosv-app to create a cmake file. Run cmake and then make. (I'm using Linux.) Replies: Re: BSP fails to build for FreeRTOS on a Nios V with UART Hi, Can you share the files, I would like replicate this on my side.