The author of this article is yjydyod, reproduced from: https://blog.csdn.net/yjydyod

foreword

This is an introductory tutorial about Renesas R7F0Cxxx series microcontrollers. There is very little information about this on the Internet, which may be the reason why fewer people use it. Due to work reasons, I have been in contact with this microcontroller during this time, so I wrote this blog, hoping to give you some help.

R7F0Cxxx is mainly for a series sold in mainland China and Hong Kong, it mainly includes the following products:

This series of device files are not integrated in the IDE of the official website, so the device files must be imported manually before building the project. At the same time, the plug-in that automatically generates peripheral module drivers that comes with the IDE cannot be used, and the independent software AP4 is used instead. Below I will use an example to show how to start the first R7F0Cxxx microcontroller program.

Start

This application example shows how to start the first R7F0Cxxx MCU program by controlling the flashing of LED lights with R7F0C014B microcontroller.

1 specification

This application note describes the application of using a timer array unit to control the flickering of LED lights . For related peripheral functions and uses, please refer to "Table 1.1 ".

Table 1.1 Related peripheral functions and uses

Peripheral function	use
Timer Array Unit 0 Channel 0	0.5s timer for updating led status
P70	LED light control

2 Development Conditions

The reference routines in this application note need to be executed under the following conditions.

Table 2.1 Development Conditions

project	content
Microcontroller used	R7F0C014B
Integrated Development Environment	CS+ for CA CX V4.01.00 或者 CS+ for CC V6.01.00
Peripheral circuit driver generation program	AP4 for RL78_EC V1.05.00
Emulator	EZ-CUBE
Microcontroller Device File	r7f0c014_dif.zip

2.1 Microcontroller

The minimum system board of R7F0C014B is selected, as shown in Figure 2.1.1 below:

Figure 2.1.1 Minimum System Board

The wiring method of LED is shown in Figure 2.1.2:

Figure 2.1.2 LED wiring diagram

2.2 Integrated Development Environment

Renesas has two integrated development environments, CS+ for CACX (hereinafter referred to as CA) and CS+ for CC (hereinafter referred to as CC). The difference between them is that CA will eventually be phased out. Now the CA version is 4.0, while the CC version is 6.0.

The feedback from the supplier's technical support is that CA was developed by NEC in the early days , and NEC 's IP is doing well, while Renesas' peripherals are doing well, and then combining the strengths of the two, Renesas did a good job About the RL78 series of microcontrollers. However , the compilation efficiency of the CA compiler is not very good, and then Renesas directly developed a new compiler to replace the CA compiler, which is the latter CC .

CA has higher support and richer resources. The demos on the official website are all based on CA, but I suggest that you use CC as an IDE later. The usage of CC is basically the same as that of CA, and the compiled binary files are compiled from CA. is 20% smaller, and CC can support long long type variables, while CA only supports long type variables.

I will not talk about the IDE environment download and installation here. As for the usage method, I will focus on CC V6.01, and some differences in CA configuration will also be mentioned.

2.3 Peripheral circuit driver generation program

AP4 is a standalone software tool that automatically generates peripheral module drivers based on user settings. A compilation tool (compiler) can be selected. AP4 generates suitable peripheral module control programs for the compilation tool, and also generates workspace files and project files for the integrated development environment. AP4 for RL78_EC supports MCU products for China - R7F0Cxx series, and supports CA78K0R and CC-RL compilers. Other microcontrollers can be generated with IDE.

2.4 Emulator

EZ-CUBE is an on-chip debug emulator with flash memory programming function, which can be used to debug programs or program programs into built-in flash memory microcontrollers. The emulator can be purchased from agents or Taobao, and the fare is about 200 yuan. If you need information, you can search EZ-CUBE on the official website, and all the information can be downloaded.

2.5 Microcontroller Device Files

Since the R7F0Cxxx series are dedicated chips for China, the device files are not integrated in the integrated development environment and must be imported manually. Download path (take R7F0C014 as an example):

Renesas Official Website->Products->MCU Products for China->R7F0C014->Software and Tools->Tools->Screening. As shown below:

3 Build the project

3.1 Import device file

Unzip the downloaded R7F014MCU device file:

Open the Readme.txt file:

Here's how different versions of the IDE import device files. Take me as an example, I installed CS+ for CC V6.01, so I need to copy all the files in Device_Custom to C:\Program Files (x86)\Renesas Electronics\CS+\CC\Device_Custom\RL78 path, and then When adding other types of chip device files, just overwrite it. It should be noted here: "When installing for the first time, there is no Device_Custom\RL78 path in the CC folder, so you need to create it manually".