init commit

.editorconfig

@@ -0,0 +1,12 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = crlf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

.gitignore

@@ -0,0 +1,93 @@
+# File created using '.gitignore Generator' for Visual Studio Code: https://bit.ly/vscode-gig
+
+# Created by https://www.toptal.com/developers/gitignore/api/c,cmake,ninja,vscode
+# Edit at https://www.toptal.com/developers/gitignore?templates=c,cmake,ninja,vscode
+
+### C ###
+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.conf
+
+### CMake ###
+CMakeLists.txt.user
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Testing
+Makefile
+cmake_install.cmake
+install_manifest.txt
+compile_commands.json
+CTestTestfile.cmake
+_deps
+CMakeUserPresets.json
+
+### CMake Patch ###
+# External projects
+*-prefix/
+
+### Ninja ###
+.ninja_deps
+.ninja_log
+
+### vscode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+
+# End of https://www.toptal.com/developers/gitignore/api/c,cmake,ninja,vscode
+
+# Custom rules (everything added below won't be overriden by 'Generate .gitignore File' if you use 'Update' option)
+!.vscode/c_cpp_properties.json

.vscode/c_cpp_properties.json

@@ -0,0 +1,24 @@
+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "C:/Users/HP/scoop/apps/sdcc/4.1.0/include",
+                "C:/Users/HP/scoop/apps/sdcc/4.1.0/non-free/include/pic14",
+                "${workspaceFolder}/**"
+            ],
+            "defines": [
+                "__code=",
+                "interrupt=",
+                "__sfr=char",
+                "__at(x)=",
+                "_DEBUG",
+                "UNICODE",
+                "_UNICODE"
+            ],
+            "cStandard": "c99",
+            "intelliSenseMode": "clang-x86"
+        }
+    ],
+    "version": 4
+}

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    "files.associations": {
+        "*.h": "c",
+    }
+}

CMakeLists.txt

@@ -0,0 +1,42 @@
+cmake_minimum_required(VERSION 3.18.0)
+
+set(CMAKE_USER_MAKE_RULES_OVERRIDE cmake/override.cmake)
+
+set(CMAKE_C_COMPILER "C:/Users/HP/scoop/apps/sdcc/4.1.0/bin/sdcc.exe")
+
+# make CMake happy with sdcc
+set(CMAKE_C_COMPILER_WORKS TRUE)
+set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
+set(CMAKE_SYSTEM_NAME Generic)
+
+set(CMAKE_BUILD_TYPE Debug)
+# set(CMAKE_BUILD_TYPE MinSizeRel)
+
+project(firmware
+    LANGUAGES C
+)
+
+add_executable(${PROJECT_NAME} main.c)
+
+# set(PROG_TOOL "pk3")
+set(PROG_TOOL "icd3")
+set(MCU_ID "12f617")
+set(IPECMD "C:/Program Files (x86)/Microchip/MPLABX/v3.55/mplab_ipe/ipecmd.exe")
+
+set(CMAKE_C_FLAGS "--use-non-free -mpic14 -p${MCU_ID}")
+
+# Enable the target power supply - VDD = 4.75 volts.
+# -W4.75
+
+add_custom_target(erase
+    COMMAND
+    ${IPECMD} -TP${PROG_TOOL} -P${MCU_ID} -E -W4.75
+    COMMENT "erase ${MCU_ID} with ${PROG_TOOL}..."
+)
+
+add_custom_target(flash
+    COMMAND
+    ${IPECMD} -TP${PROG_TOOL} -P${MCU_ID} -M -W4.75 -F\"${CMAKE_BINARY_DIR}/firmware.hex\"
+    DEPENDS all
+    COMMENT "flash ${MCU_ID} with ${PROG_TOOL}..."
+)

README.md

@@ -0,0 +1,18 @@
+# SDCC PIC12F617 example
+
+## Requirement
+
+1. [SDCC](https://sourceforge.net/projects/sdcc/files/)
+2. [GPUTILS](https://sourceforge.net/projects/gputils/files/)
+3. [CMake](https://github.com/Kitware/CMake/releases)
+4. [Ninja](https://github.com/ninja-build/ninja/releases)
+
+## How to Build
+
+modify the `CMAKE_C_COMPILER` variable in `CMakeLists.txt`
+
+```bash
+$ cd build
+$ cmake -G Ninja ..
+$ ninja
+```

build/.gitignore

@@ -0,0 +1,8 @@
+*.ninja
+*.cod
+*.lst
+log.0
+log.1
+log.2
+MPLABXLog.xml
+MPLABXLog.xml.lck

cmake/override.cmake

@@ -0,0 +1 @@
+set(CMAKE_C_OUTPUT_EXTENSION ".o")

main.c

@@ -0,0 +1,72 @@
+#include <stdint.h>
+#include <pic12f617.h>
+
+__code uint16_t __at(_CONFIG) __configword = _FOSC_INTOSCIO &
+                                             _WDTE_OFF &
+                                             _PWRTE_OFF &
+                                             _MCLRE_OFF &
+                                             _CP_OFF &
+                                             _IOSCFS_4MHZ &
+                                             _BOREN_ON &
+                                             _WRT_OFF;
+
+volatile uint8_t tick_reached;
+volatile uint8_t sys_ticks = 0;
+
+/* make VSCode happy */
+#ifdef __SDCC
+#define ISR __interrupt 0
+#else
+#define ISR
+#endif
+
+void isr(void) ISR
+{
+    if (TMR1IF == 1)
+    {
+        TMR1IF = 0;       /* clear timer1 interrupt flag */
+        TMR1H = 0xD8;     /* ((55535 >> 8) & 0xff) 10ms */
+        TMR1L = 0xEF;     /* ((55535 >> 0) & 0xff) 10ms */
+        tick_reached = 1; /* set tick flag */
+    }
+}
+
+int main(void)
+{
+    /* LED is on GP5 */
+    TRISIO &= ~(1u << 5); /* config GP5 output */
+    ANSEL &= ~(1u << 5);  /* config GP5 digital I/O */
+    WPU &= ~(1u << 5);    /* disable GP5 pullup */
+
+    /**
+     * 10ms = 0.01s
+     * (0.01 * (fOSC/4/pre)) = 65535 - TMR1
+     * TMR1 = 65535 - (0.01 * (fOSC/4/pre))
+     *      = 65535 - (0.01 * (4000000/4/1))
+     *      = 55535
+     */
+    TMR1CS = 0;   /* Timer1 clock source INTOSC */
+    T1CKPS1 = 0;  /* Timer1 prescale 1 */
+    T1CKPS0 = 0;  /* Timer1 prescale 1 */
+    TMR1H = 0xD8; /* ((55535 >> 8) & 0xff) 10ms */
+    TMR1L = 0xEF; /* ((55535 >> 0) & 0xff) 10ms */
+    TMR1ON = 1;   /* enable timer1 */
+    TMR1IE = 1;   /* enable timer1 interrupt */
+
+    PEIE = 1; /* enable peripheral interrupt */
+    GIE = 1;  /* enable global interrupt */
+
+    while (1)
+    {
+        if (tick_reached)
+        {
+            tick_reached = 0;
+            sys_ticks++;
+            if (sys_ticks == 50) /* blink the LED every 10 * 50 ms */
+            {
+                GPIO ^= (1u << 5); /* toggle GP5 output */
+                sys_ticks = 0;
+            }
+        }
+    }
+}