How to check and modify the register status by PinView and lua script? Issue Date：2019-10-02

The PinView can access MCU memory with lua file without using KEIL μVision or IAR EWARM. Also, the PinView supports the following operations by lua script:

(1) Access register to verify hardware circuit

(2) Dump SRAM data

(3) Support lua script to quickly implement test program

Lua web site: https://www.lua.org/

Scenario:

(1) User is debugging a customer project but cannot access the source project.

(2) User only has KEIL μVision now but customer uses IAR EWARM to develop projects.

1. Create a lua file. (Lua Example 1)

2. Open the PinView

3. Run the lua file script

4. The PinView log window shows the changes

Lua Example 1: my1.lua – Access GPIOA register to toggle I/O

-- Config

local write_data = 0

local RegAdd = 0x50004008 -- GPIOA_DOUT

-- Print setting

local ext = require("ext")

local print = ext.redirect_print

print(string.format('Hello Nuvoton'));

-- Read register

local read_data = ice:ReadMem32(RegAdd)

print(string.format("ReadMem: addr 0x%08X, data 0x%08X", RegAdd, read_data))

-- Write register

write_data = 0xFFFF-read_data; -- Invert GPIOA data

ice:WriteMem32(RegAdd, write_data)

print(string.format("WriteMem addr 0x%08X, data 0x%08X", RegAdd, write_data))

Lua Example 2: my.lua – Dump SRAM data

-- Config

local RegAdd = 0x20000000 -- SRAM address

local total_size = 256 -- Data length

-- Print setting

local ext = require("ext")

local print = ext.redirect_print

print(string.format('Hello Nuvoton'));

-- Dump SRAM data

local i = 0

while i < total_size do

            local read_data = ice:ReadMem32(RegAdd+i)

            print(string.format("ReadMem: addr 0x%08X, data 0x%08X", RegAdd+i, read_data))

            i = i + 4

end