# FL-M32_Runtime

**Repository Path**: aleclea/FL-M32_Runtime

## Basic Information

- **Project Name**: FL-M32_Runtime
- **Description**: FL-M32软件运行环境
- **Primary Language**: C
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 1
- **Created**: 2023-04-18
- **Last Updated**: 2023-04-18

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README



# FengLin M32 (FL-M32) SoC Runtime

FL-M32 is a small and efficient, 32-bit, RISCV-based SoC for Network processing.
FL-M32_Runtime is the runtime environment for FL-M32 SoC, and has implemented some basic 
functions to simplify C-based development.

## Example

[firmware_singleCore_Replace_MAC_Addr](https://gitee.com/lixuan-abc/FL-M32_Runtime/tree/master/firmware_singleCore_Replace_MAC_Addr) is a example C-based program for replace Src and Dst MAC
address for all received packets.

## Changelog
* 2023/3/22：add RAM_SIZE_KB at Firmware_SingleCore_Runtime/Makefile.sys,
    which used to calculate RAM_SIZE, INSTR_LEN, DATA_BASE_ADDR and 
    DATA_LEN; RAM_SIZE is lines of firmware.hex, while {INSTR_LEN,...} are
    used to reconfigure memory size in link/link.ld;
    
    Modified in [Makefile.sys](https://gitee.com/lixuan-abc/FL-M32_Runtime/tree/master/Firmware_SingleCore_Runtime/Makefile.sys).
           
       RAM_SIZE_KB     = 256 #default                                 
       RAM_SIZE        = $(shell expr $(RAM_SIZE_KB) \* 256)
       INSTR_BASE_ADDR = 0
       INSTR_LEN       = $(shell expr $(RAM_SIZE_KB) \* 128)
       DATA_BASE_ADDR  = $(INSTR_LEN)
       DATA_LEN        = $(INSTR_LEN)

    ORIGIN and LENGTH (in [link.ld](https://gitee.com/lixuan-abc/FL-M32_Runtime/tree/master/Firmware_SingleCore_Runtime/link/link.ld)) are auto-configured by Makefile 
    
             ram (rwxai) : ORIGIN = 0x00000000, LENGTH = 0x10000
        ram_data (rwxai) : ORIGIN = 0x00010000, LENGTH = 0x10000

    So, you can use makefile with "make RAM_SIZE_KB=128" for 128KB Memory;

* 2023/3/22：fix the difination of 32b irq_bitmap (in global_head.v), i.e.,

       `define TIME_IRQ      7
       `define UART_IRQ      16  
       `define GPIO_IRQ      17  
       `define SPI_IRQ       18  
       `define CSR_IRQ       19  
       `define CSRAM_IRQ     20  
       `define dDMA_IRQ      21  
       `define DMA_IRQ       22  
       `define DRA_IRQ       23 


* 2023/3/25：add TIMER_IRQ_PROC_IN_ASM in [Makefile.sys](https://gitee.com/lixuan-abc/FL-M32_Runtime/tree/master/Firmware_SingleCore_Runtime/Makefile.sys), which used to compile timer irq processing writen in asm; add DRA_IRQ_PROC_IN_ASM in [Makefile.sys](https://gitee.com/lixuan-abc/FL-M32_Runtime/tree/master/Firmware_SingleCore_Runtime/Makefile.sys), which used to compile dma irq processing writen in asm;
                                                         
       TIMER_IRQ_PROC_IN_ASM   = 0
       DMA_IRQ_PROC_IN_ASM     = 0
       ifeq ("$(TIMER_IRQ_PROC_IN_ASM)", "1")
           TIMER_IRQ_IN_ASM    = -DTIMER_IRQ_IN_ASM=1
       else
           TIMER_IRQ_IN_ASM    = -DTIMER_IRQ_IN_ASM=0
       endif
       ifeq ("$(DMA_IRQ_PROC_IN_ASM)", "1")
           DMA_IRQ_IN_ASM      = -DDMA_IRQ_IN_ASM=1
       else
           DMA_IRQ_IN_ASM      = -DDMA_IRQ_IN_ASM=0
       endif

    So, you can use makefile with "make TIMER_IRQ_PROC_IN_ASM=1" to choose processing time irq in asm or "make TIMER_IRQ_PROC_IN_ASM=0" to choose processing time irq in c; it is same to DMA_IRQ_PROC_IN_ASM=1;

## Issues and Troubleshooting
If you find any problems or issues with FL-M32 Runtime or the documentation, please check out the issue tracker and create a new issue if your problem is not yet tracked.