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EPROMEmu
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Added some basic commands

This commit is contained in:
Stephen Moody 2019-08-16 15:29:22 +01:00
parent c6caaafde7
commit fdaf848014
3 changed files with 156 additions and 156 deletions
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54
Inc/commands.h
View File

@ -1,27 +1,27 @@
#ifndef DECODECOMMANDS_H
#define DECODECOMMANDS_H
#include "stm32f0xx_system.h"
enum CommsErrors
{
CMD_NO_ERROR = 0,
CMD_NOT_KNOWN = -1,
CMD_BUSY = -2,
CMD_PARAM_ERROR = -3,
CMD_RANGE_ERROR = -4
};
#define MAX_BUFFER_LENGTH 255
typedef struct
{
char *command; // Two character command code
int16_t (*function_ptr)(); // Pointer to command function
char *desc; // Pointer to description string for help
} command_entry_t;
void decode_command(char* commandStr);
#endif
#ifndef DECODECOMMANDS_H
#define DECODECOMMANDS_H
#include "stm32f0xx_system.h"
enum CommsErrors
{
CMD_NO_ERROR = 0,
CMD_NOT_KNOWN = -1,
CMD_BUSY = -2,
CMD_PARAM_ERROR = -3,
CMD_RANGE_ERROR = -4
};
#define MAX_BUFFER_LENGTH 255
typedef struct
{
char *command; // Two character command code
int16_t (*function_ptr)(); // Pointer to command function
char *desc; // Pointer to description string for help
} command_entry_t;
void decode_command(char* commandStr);
#endif

232
Src/commands.c
View File

@ -1,116 +1,116 @@
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "commands.h"
#include "gpio.h"
extern const char *firmware_version;
int16_t cmd_print_help(void);
int16_t cmd_print_version(void);
int16_t cmd_reset_state(char *params);
const command_entry_t g_command_tab[] =
{
{"??", cmd_print_help, "Displays this help with a list of available commands"},
{":S", cmd_reset_state, "Sets the reset state of the target board, params 0 or 1"},
{":V", cmd_print_version, "Displays the version number"}
};
// Number of commands in the Command Table
const uint16_t g_number_commands = sizeof(g_command_tab) / sizeof(command_entry_t);
// This allows commands from RS232 interface to control the board, format given above.
void decode_command(char* commandStr)
{
char tempCommand[3] = {0};
char *paramPtr;
// Convert command string to upper case
strupr(commandStr);
// skip whitespace characters
while (isspace(*commandStr) && (*commandStr != '\0'))
commandStr++;
if (*commandStr == '\0')
{
// no command found on
printf("%d\n", CMD_NOT_KNOWN);
return;
}
// command found search for parameter string
paramPtr = commandStr + 2;
// skip whitespace characters
while (isspace(*paramPtr) && (*paramPtr != '\0'))
paramPtr++;
// set parameter pointer to zero if no parameter found on line
if (*paramPtr == '\0')
paramPtr = 0;
// copy 1st 2 characters of command string into tempCommand
tempCommand[0] = commandStr[0];
tempCommand[1] = commandStr[1];
// search for valid command
for (int cmd = 0; cmd < g_number_commands; cmd++)
{
if (strcmp(tempCommand, g_command_tab[cmd].command) == 0)
{
// jump to matching command and save error code from command handler
int tmpErr = (*g_command_tab[cmd].function_ptr)(paramPtr);
if (tmpErr != CMD_NO_ERROR)
printf("%d\n", tmpErr);
return;
}
}
// here if no commands matched
printf("%d\n", CMD_NOT_KNOWN);
}
int16_t cmd_print_help()
{
printf("Commands available:\n");
// Print the command code and the description for each command in the table
for (uint16_t i = 0; i < g_number_commands; i++)
{
if (g_command_tab[i].command != NULL)
printf("\t%s - %s\n", g_command_tab[i].command, g_command_tab[i].desc);
else
printf("%s\n", g_command_tab[i].desc);
}
return CMD_NO_ERROR;
}
int16_t cmd_print_version()
{
printf("%d\nEPROM Emulator firmware version: %s\n", CMD_NO_ERROR, firmware_version);
return CMD_NO_ERROR;
}
int16_t cmd_reset_state(char *params)
{
int state;
int numParams = sscanf(params, "%d", &state);
if (numParams != 1)
{
printf("%d\n", CMD_PARAM_ERROR);
return CMD_PARAM_ERROR;
}
set_target_reset_state((uint8_t)state);
printf("%d\n", CMD_NO_ERROR);
return CMD_NO_ERROR;
}
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "commands.h"
#include "gpio.h"
extern const char *firmware_version;
int16_t cmd_print_help(void);
int16_t cmd_print_version(void);
int16_t cmd_reset_state(char *params);
const command_entry_t g_command_tab[] =
{
{"??", cmd_print_help, "Displays this help with a list of available commands"},
{":S", cmd_reset_state, "Sets the reset state of the target board, params 0 or 1"},
{":V", cmd_print_version, "Displays the version number"}
};
// Number of commands in the Command Table
const uint16_t g_number_commands = sizeof(g_command_tab) / sizeof(command_entry_t);
// This allows commands from RS232 interface to control the board, format given above.
void decode_command(char* commandStr)
{
char tempCommand[3] = {0};
char *paramPtr;
// Convert command string to upper case
strupr(commandStr);
// skip whitespace characters
while (isspace(*commandStr) && (*commandStr != '\0'))
commandStr++;
if (*commandStr == '\0')
{
// no command found on
printf("%d\n", CMD_NOT_KNOWN);
return;
}
// command found search for parameter string
paramPtr = commandStr + 2;
// skip whitespace characters
while (isspace(*paramPtr) && (*paramPtr != '\0'))
paramPtr++;
// set parameter pointer to zero if no parameter found on line
if (*paramPtr == '\0')
paramPtr = 0;
// copy 1st 2 characters of command string into tempCommand
tempCommand[0] = commandStr[0];
tempCommand[1] = commandStr[1];
// search for valid command
for (int cmd = 0; cmd < g_number_commands; cmd++)
{
if (strcmp(tempCommand, g_command_tab[cmd].command) == 0)
{
// jump to matching command and save error code from command handler
int tmpErr = (*g_command_tab[cmd].function_ptr)(paramPtr);
if (tmpErr != CMD_NO_ERROR)
printf("%d\n", tmpErr);
return;
}
}
// here if no commands matched
printf("%d\n", CMD_NOT_KNOWN);
}
int16_t cmd_print_help()
{
printf("Commands available:\n");
// Print the command code and the description for each command in the table
for (uint16_t i = 0; i < g_number_commands; i++)
{
if (g_command_tab[i].command != NULL)
printf("\t%s - %s\n", g_command_tab[i].command, g_command_tab[i].desc);
else
printf("%s\n", g_command_tab[i].desc);
}
return CMD_NO_ERROR;
}
int16_t cmd_print_version()
{
printf("%d\nEPROM Emulator firmware version: %s\n", CMD_NO_ERROR, firmware_version);
return CMD_NO_ERROR;
}
int16_t cmd_reset_state(char *params)
{
int state;
int numParams = sscanf(params, "%d", &state);
if (numParams != 1)
{
printf("%d\n", CMD_PARAM_ERROR);
return CMD_PARAM_ERROR;
}
set_target_reset_state((uint8_t)state);
printf("%d\n", CMD_NO_ERROR);
return CMD_NO_ERROR;
}

26
Src/shiftregister.c
View File

@ -1,4 +1,4 @@
#include "shiftregister.h"
#include "shiftregister.h"
//Global Variables
uint32_t g_output_shift_data = 0; //!< Data to be written to the shift register outputs
@ -19,16 +19,16 @@ void set_sr_data_out(uint8_t state)
{
HAL_GPIO_WritePin(SR_DATA_GPIO_Port, SR_DATA_Pin, state);
}
void set_sr_reset_state(uint8_t state)
{
HAL_GPIO_WritePin(SR_RST_GPIO_Port, SR_RST_Pin, state);
}
void set_sr_output_state(uint8_t state)
{
HAL_GPIO_WritePin(SR_OE_GPIO_Port, SR_OE_Pin, state);
void set_sr_reset_state(uint8_t state)
{
HAL_GPIO_WritePin(SR_RST_GPIO_Port, SR_RST_Pin, state);
}
void set_sr_output_state(uint8_t state)
{
HAL_GPIO_WritePin(SR_OE_GPIO_Port, SR_OE_Pin, state);
}
uint32_t read_sr_data_in(void)
{
@ -51,8 +51,8 @@ uint32_t update_shift_registers(void)
uint32_t data_out = 0;
uint32_t data_in = 0;
uint32_t bit_mask;
uint8_t i;
uint8_t i;
// Shift Data out
data_out = g_output_shift_data;
bit_mask = 0x0800;
@ -60,7 +60,7 @@ uint32_t update_shift_registers(void)
for (i = 0; i < 24; i++)
{
set_sr_clock(0);
if (data_out & bit_mask)
set_sr_data_out(1);
else