557 lines
14 KiB
C
557 lines
14 KiB
C
/**
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* @file app_cli.c
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* @brief CLI framework: an independent task receives command lines from the
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* USART1 RX interrupt queue, parses and executes them, and answers
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* through USART1 DMA TX.
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*
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* Line terminators: "\r\n", "\n\r", "\r" and "\n" are all accepted.
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* Editing: backspace (0x08 / 0x7F) erases the last character.
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*/
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#include "app_cli.h"
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#include "bsp_usart.h"
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#include "bsp_led.h"
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#include "app_tasks.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include "FreeRTOS.h"
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#include "task.h"
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#define CLI_TASK_STACK 1024 /* in words (printf needs more stack) */
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#define CLI_TASK_PRIO 3
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#define CLI_LINE_BUF_SIZE 64
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#define CLI_TX_BUF_SIZE 96
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#define CLI_MAX_ARGS 8
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#define CLI_HISTORY_SIZE 8 /* number of remembered command lines */
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#define CLI_PROMPT "caiic->"
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/* Key codes */
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#define CLI_KEY_TAB 0x09
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#define CLI_KEY_ESC 0x1B
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#define CLI_KEY_CTRL_Z 0x1A
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#define CLI_KEY_BACKSPACE 0x08
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#define CLI_KEY_DEL 0x7F
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typedef void (*CliCmdHandler_t)(int argc, char* argv[]);
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typedef struct
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{
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const char* name;
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const char* help;
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CliCmdHandler_t handler;
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} CliCmd_t;
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static char s_txBuf[CLI_TX_BUF_SIZE];
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/**
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* @brief Send a string through USART1 DMA TX.
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* @note Strings must contain explicit "\r\n" (no auto CR like fputc).
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*/
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static void cli_write(const char* str)
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{
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bsp_usart_write_dma((const uint8_t*)str, (uint16_t)strlen(str));
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}
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/**
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* @brief Formatted CLI output through USART1 DMA TX.
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*/
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static void cli_printf(const char* fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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vsnprintf(s_txBuf, CLI_TX_BUF_SIZE, fmt, args);
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va_end(args);
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s_txBuf[CLI_TX_BUF_SIZE - 1] = '\0';
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cli_write(s_txBuf);
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}
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/* ------------------------------------------------------------------ */
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/* Built-in commands */
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/* ------------------------------------------------------------------ */
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static void CmdHelp(int argc, char* argv[]);
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/**
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* @brief "version": show firmware and clock info.
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*/
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static void CmdVersion(int argc, char* argv[])
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{
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(void)argc;
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(void)argv;
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cli_write("N32WB031 FreeRTOS + UART(DMA) + LED + CLI demo\r\n");
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cli_printf("SystemCoreClock = %lu Hz\r\n", (unsigned long)SystemCoreClock);
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}
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/**
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* @brief "log [on|off]": show or set the active log printing switch.
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*/
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static void CmdLog(int argc, char* argv[])
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{
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if (argc < 2)
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{
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cli_printf("log is %s\r\n", AppTasks_GetLogEnabled() ? "on" : "off");
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return;
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}
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if (strcmp(argv[1], "on") == 0)
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{
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AppTasks_SetLogEnabled(1);
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}
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else if (strcmp(argv[1], "off") == 0)
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{
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AppTasks_SetLogEnabled(0);
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}
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else
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{
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cli_write("usage: log [on|off]\r\n");
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return;
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}
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cli_printf("log set to %s\r\n", AppTasks_GetLogEnabled() ? "on" : "off");
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}
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/**
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* @brief "led <1|2> <on|off|toggle>": control a board LED.
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*/
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static void CmdLed(int argc, char* argv[])
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{
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GPIO_Module* port;
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uint16_t pin;
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if (argc < 3)
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{
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cli_write("usage: led <1|2> <on|off|toggle>\r\n");
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return;
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}
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if (argv[1][0] == '1' && argv[1][1] == '\0')
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{
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port = LED1_PORT;
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pin = LED1_PIN;
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}
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else if (argv[1][0] == '2' && argv[1][1] == '\0')
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{
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port = LED2_PORT;
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pin = LED2_PIN;
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}
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else
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{
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cli_write("usage: led <1|2> <on|off|toggle>\r\n");
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return;
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}
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if (strcmp(argv[2], "on") == 0)
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{
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bsp_led_on(port, pin);
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}
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else if (strcmp(argv[2], "off") == 0)
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{
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bsp_led_off(port, pin);
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}
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else if (strcmp(argv[2], "toggle") == 0)
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{
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bsp_led_toggle(port, pin);
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}
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else
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{
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cli_write("usage: led <1|2> <on|off|toggle>\r\n");
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return;
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}
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cli_printf("led %s %s done\r\n", argv[1], argv[2]);
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}
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/* Command table; add new commands here */
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static const CliCmd_t s_cmds[] = {
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{"help", "list all commands", CmdHelp},
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{"version", "show firmware/clock info", CmdVersion},
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{"log", "log [on|off]: active printing switch (default off)", CmdLog},
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{"led", "led <1|2> <on|off|toggle>: control board LED", CmdLed},
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};
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#define CLI_CMD_COUNT (sizeof(s_cmds) / sizeof(s_cmds[0]))
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/**
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* @brief "help": list all registered commands.
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*/
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static void CmdHelp(int argc, char* argv[])
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{
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uint32_t i;
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(void)argc;
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(void)argv;
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cli_write("commands:\r\n");
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for (i = 0; i < CLI_CMD_COUNT; i++)
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{
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cli_printf(" %-8s %s\r\n", s_cmds[i].name, s_cmds[i].help);
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}
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cli_write("keys: TAB = complete, UP/DOWN = history, Ctrl+Z = log off\r\n");
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}
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/* ------------------------------------------------------------------ */
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/* Line parsing / dispatch */
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/* ------------------------------------------------------------------ */
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/**
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* @brief Tokenize a received line in place and run the matching command.
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*/
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static void cli_dispatch(char* line)
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{
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char* argv[CLI_MAX_ARGS];
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int argc = 0;
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char* p = line;
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uint32_t i;
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/* Split on spaces/tabs */
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while (*p != '\0' && argc < CLI_MAX_ARGS)
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{
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while (*p == ' ' || *p == '\t')
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{
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p++;
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}
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if (*p == '\0')
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{
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break;
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}
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argv[argc++] = p;
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while (*p != '\0' && *p != ' ' && *p != '\t')
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{
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p++;
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}
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if (*p != '\0')
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{
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*p++ = '\0';
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}
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}
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if (argc == 0)
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{
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return;
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}
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for (i = 0; i < CLI_CMD_COUNT; i++)
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{
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if (strcmp(argv[0], s_cmds[i].name) == 0)
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{
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s_cmds[i].handler(argc, argv);
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return;
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}
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}
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cli_printf("unknown command: %s (try 'help')\r\n", argv[0]);
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}
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/* ------------------------------------------------------------------ */
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/* Command history (ring buffer) */
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/* ------------------------------------------------------------------ */
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static char s_history[CLI_HISTORY_SIZE][CLI_LINE_BUF_SIZE];
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static uint8_t s_histCount = 0; /* number of valid entries */
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static uint8_t s_histHead = 0; /* next write position */
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/**
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* @brief Store a command line in the history ring (skips empty lines and
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* repeats of the most recent entry).
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*/
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static void cli_history_add(const char* line)
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{
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if (line[0] == '\0')
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{
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return;
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}
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if (s_histCount > 0)
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{
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uint8_t last = (s_histHead + CLI_HISTORY_SIZE - 1) % CLI_HISTORY_SIZE;
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if (strcmp(s_history[last], line) == 0)
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{
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return;
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}
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}
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strcpy(s_history[s_histHead], line);
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s_histHead = (s_histHead + 1) % CLI_HISTORY_SIZE;
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if (s_histCount < CLI_HISTORY_SIZE)
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{
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s_histCount++;
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}
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}
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/**
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* @brief Get a history entry; nav = 0 is the newest entry.
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*/
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static const char* cli_history_get(int nav)
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{
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int idx = ((int)s_histHead - 1 - nav + CLI_HISTORY_SIZE) % CLI_HISTORY_SIZE;
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return s_history[idx];
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}
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/* ------------------------------------------------------------------ */
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/* Line redraw / tab completion */
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/* ------------------------------------------------------------------ */
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/**
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* @brief Redraw the input line: erase `shownLen` chars, print prompt + line.
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* @return new shown length
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*/
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static uint16_t cli_redraw_line(const char* line, uint16_t shownLen)
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{
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uint16_t i;
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uint16_t len = (uint16_t)strlen(line);
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cli_write("\r" CLI_PROMPT);
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for (i = 0; i < shownLen; i++)
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{
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cli_write(" ");
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}
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cli_write("\r" CLI_PROMPT);
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if (len > 0)
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{
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bsp_usart_write_dma((const uint8_t*)line, len);
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}
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return len;
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}
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/**
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* @brief Tab completion on the first token of the line.
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* Single match: complete it and append a space.
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* Multiple matches: extend to the common prefix, or list candidates.
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*/
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static uint16_t cli_tab_complete(char* line, uint16_t len)
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{
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char common[CLI_LINE_BUF_SIZE];
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uint16_t commonLen = 0;
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int matchCount = 0;
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uint32_t i;
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/* Only complete the first token (no space typed yet) */
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if (memchr(line, ' ', len) != NULL)
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{
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return len;
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}
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line[len] = '\0';
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for (i = 0; i < CLI_CMD_COUNT; i++)
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{
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if (strncmp(s_cmds[i].name, line, len) == 0)
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{
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if (matchCount == 0)
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{
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strcpy(common, s_cmds[i].name);
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commonLen = (uint16_t)strlen(common);
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}
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else
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{
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/* shrink common to the shared prefix */
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while (commonLen > len && strncmp(common, s_cmds[i].name, commonLen) != 0)
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{
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commonLen--;
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}
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common[commonLen] = '\0';
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}
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matchCount++;
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}
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}
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if (matchCount == 0)
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{
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return len;
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}
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if (matchCount == 1)
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{
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/* complete the command name + one space */
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while (len < CLI_LINE_BUF_SIZE - 1 && len < commonLen)
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{
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bsp_usart_write_dma((const uint8_t*)&common[len], 1);
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line[len] = common[len];
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len++;
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}
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if (len < CLI_LINE_BUF_SIZE - 1)
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{
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line[len] = ' ';
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len++;
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cli_write(" ");
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}
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return len;
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}
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if (commonLen > len)
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{
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/* extend to the common prefix */
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while (len < CLI_LINE_BUF_SIZE - 1 && len < commonLen)
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{
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bsp_usart_write_dma((const uint8_t*)&common[len], 1);
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line[len] = common[len];
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len++;
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}
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}
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else
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{
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/* ambiguous: list the candidates and redraw */
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cli_write("\r\n");
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for (i = 0; i < CLI_CMD_COUNT; i++)
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{
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if (strncmp(s_cmds[i].name, line, len) == 0)
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{
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cli_write(s_cmds[i].name);
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cli_write(" ");
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}
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}
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cli_write("\r\n");
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cli_redraw_line(line, len);
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}
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return len;
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}
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/**
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* @brief CLI task: receive bytes, edit the line, dispatch on terminator.
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* Extra keys: Ctrl+Z turns off active log printing, TAB completes
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* the command name, UP/DOWN arrows walk the command history.
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*/
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static void CliTask(void* argument)
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{
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static char line[CLI_LINE_BUF_SIZE];
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uint16_t len = 0;
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uint16_t shownLen = 0; /* chars currently displayed after the prompt */
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uint8_t swallow = 0; /* complementary terminator to swallow once */
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uint8_t escState = 0; /* 0=normal, 1=got ESC, 2=got ESC '[' */
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int histNav = -1; /* -1 = editing, 0.. = history entry (0=newest) */
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uint8_t ch;
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(void)argument;
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cli_write("\r\nCLI ready. Type 'help' for commands.\r\n" CLI_PROMPT);
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for (;;)
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{
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if (bsp_usart_read_byte(&ch, BSP_USART_WAIT_FOREVER) == 0)
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{
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continue;
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}
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/* Swallow the second half of a "\r\n" / "\n\r" pair */
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if (swallow != 0)
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{
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uint8_t exp = swallow;
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swallow = 0;
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if (ch == exp)
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{
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continue;
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}
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}
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/* Escape sequences (arrow keys: ESC '[' 'A'/'B') */
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if (escState == 1)
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{
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escState = (ch == '[') ? 2 : 0;
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continue;
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}
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if (escState == 2)
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{
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escState = 0;
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if (ch == 'A') /* UP: older history entry */
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{
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if (histNav + 1 < (int)s_histCount)
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{
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histNav++;
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strcpy(line, cli_history_get(histNav));
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shownLen = cli_redraw_line(line, shownLen);
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len = (uint16_t)strlen(line);
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}
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}
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else if (ch == 'B') /* DOWN: newer entry / back to empty line */
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{
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if (histNav >= 0)
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{
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histNav--;
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if (histNav >= 0)
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{
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strcpy(line, cli_history_get(histNav));
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}
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else
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{
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line[0] = '\0';
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}
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shownLen = cli_redraw_line(line, shownLen);
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len = (uint16_t)strlen(line);
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}
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}
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/* other escape sequences are ignored */
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continue;
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}
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if (ch == CLI_KEY_ESC)
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{
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escState = 1;
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continue;
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}
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if (ch == CLI_KEY_CTRL_Z)
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{
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/* Ctrl+Z: turn off active log printing */
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AppTasks_SetLogEnabled(0);
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cli_write("\r\n[log off]\r\n");
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shownLen = cli_redraw_line(line, len);
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continue;
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}
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if (ch == CLI_KEY_TAB)
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{
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bsp_usart_tx_lock();
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len = cli_tab_complete(line, len);
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shownLen = len;
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bsp_usart_tx_unlock();
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continue;
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}
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if (ch == '\r' || ch == '\n')
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{
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/* Any of "\r", "\n", "\r\n", "\n\r" terminates the line */
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swallow = (ch == '\r') ? (uint8_t)'\n' : (uint8_t)'\r';
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bsp_usart_tx_lock();
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cli_write("\r\n");
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line[len] = '\0';
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cli_history_add(line); /* copy before dispatch tokenizes in place */
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cli_dispatch(line);
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cli_write(CLI_PROMPT);
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bsp_usart_tx_unlock();
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len = 0;
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shownLen = 0;
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histNav = -1;
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}
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else if (ch == CLI_KEY_BACKSPACE || ch == CLI_KEY_DEL)
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{
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if (len > 0)
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{
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len--;
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cli_write("\b \b");
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shownLen = len;
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}
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}
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else if (ch >= 0x20 && ch < 0x7F)
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{
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if (len < CLI_LINE_BUF_SIZE - 1)
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{
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line[len++] = (char)ch;
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bsp_usart_write_dma(&ch, 1); /* echo */
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shownLen = len;
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}
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else
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{
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cli_write("\a"); /* line full: bell */
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}
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}
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/* other control characters are ignored */
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}
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}
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/**
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* @brief Create the CLI task.
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*/
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void AppCli_Init(void)
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{
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xTaskCreate(CliTask, "CLI", CLI_TASK_STACK, NULL, CLI_TASK_PRIO, NULL);
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}
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