add CORDIC

G4:G431/CORDIC/commproto.cpp

@@ -0,0 +1,224 @@
+/*
+ * This file is part of the cordic project.
+ * Copyright 2026 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <cstring>
+
+extern "C"{
+#include <stm32g4.h>
+
+#include "commproto.h"
+#include "hardware.h"
+#include "strfunc.h"
+#include "test.h"
+}
+
+// sending function
+static int (*SEND)(const char *str) = nullptr;
+
+extern volatile uint32_t Tms;
+
+//static uint8_t curbuf[MAXSTRLEN];
+
+// COMMAND(USART,      "Read USART data or send (USART=hex)")
+
+#define STR_HELPER(x) #x
+#define STR(x) STR_HELPER(x)
+
+// list of all commands and handlers
+#define COMMAND_TABLE \
+    COMMAND(help,       "show this help") \
+    COMMAND(testm,      "test math function: sin, cos, atan, sqrt, log") \
+    COMMAND(testc,      "test CORDIC function: sin, cos, atan, sqrt, log")
+
+
+typedef struct {
+    const char *name;
+    const char *desc;
+} CmdInfo;
+
+// prototypes
+#define COMMAND(name, desc)   static errcodes_t cmd_ ## name(const char*, char*);
+COMMAND_TABLE
+#undef COMMAND
+
+static const CmdInfo cmdInfo[] = { // command name, description - for `help`
+#define COMMAND(name, desc)   { #name, desc },
+        COMMAND_TABLE
+#undef COMMAND
+};
+
+static const char* errtxt[ERR_AMOUNT] = {
+    [ERR_OK]        = "OK\n",
+    [ERR_BADCMD]    = "BADCMD\n",
+    [ERR_BADPAR]    = "BADPAR\n",
+    [ERR_BADVAL]    = "BADVAL\n",
+    [ERR_WRONGLEN]  = "WRONGLEN\n",
+    [ERR_CANTRUN]   = "CANTRUN\n",
+    [ERR_BUSY]      = "BUSY\n",
+    [ERR_OVERFLOW]  = "OVERFLOW\n",
+};
+
+const char *EQ = " = "; // equal sign for getters
+
+// send `command = `
+#define CMDEQ()   do{SEND(cmd); SEND(EQ);}while(0)
+// send `commandXXX = `
+#define CMDEQP(x)   do{SEND(cmd); SEND(u2str((uint32_t)x)); SEND(EQ);}while(0)
+// the same as last but with command as option and uint value
+#define SHOWPARU(cmd, x, val)  do{SEND(cmd); SEND(u2str((uint32_t)x)); SEND(EQ); SEND(u2str(val));}while(0)
+
+/**
+ * @brief splitargs - get command parameter and setter from `args`
+ * @param args (i) - rest of string after command (like `1 = PU OD OUT`)
+ * @param parno (o) - parameter number or -1 if none
+ * @return setter (part after `=` without leading spaces) or NULL if none
+ */
+static char *splitargs(char *args, int32_t *parno){
+    if(!args) return NULL;
+    uint32_t U32;
+    char *next = getnum(args, &U32);
+    int p = -1;
+    if(next != args && U32 <= MAXPARNO) p = U32;
+    if(parno) *parno = p;
+    next = strchr(next, '=');
+    if(next){
+        if(*(++next)) next = omit_spaces(next);
+        if(*next == 0) next = NULL;
+    }
+    return next;
+}
+
+#if 0
+/**
+ * @brief argsvals - split `args` into `parno` and setter's value
+ * @param args - rest of string after command
+ * @param parno (o) - parameter number or -1 if none
+ * @param parval - integer setter's value
+ * @return false if no setter or it's not a number, true - got setter's num
+ */
+static bool argsvals(char *args, int32_t *parno, int32_t *parval){
+    char *setter = splitargs(args, parno);
+    if(!setter) return false;
+    int32_t I32;
+    char *next = getint(setter, &I32);
+    if(next != setter){
+        if(parval) *parval = I32;
+        return true;
+    }
+    return false;
+}
+#endif
+
+static errcodes_t cmd_help(const char*, char*){
+    SEND(REPOURL);
+    for(size_t i = 0; i < sizeof(cmdInfo)/sizeof(cmdInfo[0]); i++){
+        SEND(cmdInfo[i].name);
+        SEND(" - ");
+        SEND(cmdInfo[i].desc); SEND("\n");
+    }
+    return ERR_AMOUNT;
+}
+
+static const char* parse_func_name(char *args, int32_t *parno){
+    char *setter = splitargs(args, parno);
+    if(!setter) return nullptr;
+    // remove trailing spaces
+    char *p = setter;
+    while(*p && *p > ' ') ++p;
+    *p = 0;
+    return setter;
+}
+
+// test math function
+static errcodes_t cmd_testm(const char*, char *args){
+    int32_t parno;
+    const char *fname = parse_func_name(args, &parno);
+    if(!fname) return ERR_BADPAR;
+    uint32_t elapsed = 0;
+    bool ok = true;
+    if(strcmp(fname, "sin") == 0){
+        elapsed = test_math_sin();
+    }else if(strcmp(fname, "cos") == 0){
+        elapsed = test_math_cos();
+    }else if(strcmp(fname, "atan") == 0){
+        elapsed = test_math_atan();
+    }else if(strcmp(fname, "sqrt") == 0){
+        elapsed = test_math_sqrt();
+    }else if(strcmp(fname, "log") == 0){
+        elapsed = test_math_log();
+    }else{
+        ok = false;
+    }
+    if(!ok) return ERR_BADVAL;
+    SEND("TIME=");
+    SEND(u2str(elapsed));
+    SEND("\n");
+    return ERR_AMOUNT;
+}
+
+
+// test CORDIC function
+static errcodes_t cmd_testc(const char*, char *args){
+    int32_t parno;
+    const char *fname = parse_func_name(args, &parno);
+    if(!fname) return ERR_BADPAR;
+    uint32_t elapsed = 0;
+    bool ok = true;
+    if(strcmp(fname, "sin") == 0){
+        elapsed = test_cordic_sin();
+    }else if(strcmp(fname, "cos") == 0){
+        elapsed = test_cordic_cos();
+    }else if(strcmp(fname, "atan") == 0){
+        elapsed = test_cordic_atan();
+    }else if(strcmp(fname, "sqrt") == 0){
+        elapsed = test_cordic_sqrt();
+    }else if(strcmp(fname, "log") == 0){
+        elapsed = test_cordic_log();
+    }else{
+        ok = false;
+    }
+    if(!ok) return ERR_BADVAL;
+    SEND("TIME=");
+    SEND(u2str(elapsed));
+    SEND("\n");
+    return ERR_AMOUNT;
+}
+
+constexpr uint32_t hash(const char* str, uint32_t h = 0){
+    return *str ? hash(str + 1, h + ((h << 7) ^ *str)) : h;
+}
+
+const char *parse_cmd(int (*sendfun)(const char *), char *str){
+    SEND = sendfun;
+    char command[CMD_MAXLEN+1];
+    int i = 0;
+    while(*str > '@' && i < CMD_MAXLEN){ command[i++] = *str++; }
+    command[i] = 0;
+    while(*str && *str <= ' ') ++str;
+    char *restof = (char*) str;
+    uint32_t h = hash(command);
+    errcodes_t ecode = ERR_AMOUNT;
+    switch(h){
+#define COMMAND(name, desc) case hash(#name): ecode = cmd_ ## name(command, restof); break;
+        COMMAND_TABLE
+#undef COMMAND
+            default: SEND("Unknown command, try 'help'\n"); break;
+    }
+    if(ecode < ERR_AMOUNT) return errtxt[ecode];
+    return NULL;
+}