int gpio_get_direction(uint8_t gpio_pin, uint8_t *dir)
{
char value[MAX_STR_LENGTH];
if (!check_pin(gpio_pin))
return -1;
if (dir == NULL) {
fprintf(stderr, "gpio: Cannot store direction of pin %d to null variable.\n", gpio_pin);
return -1;
}
if (!is_gpio_exported(gpio_pin))
return 0;
if (read_str_gpio_file(gpio_pin, "direction", value, MAX_STR_LENGTH) < 0)
return -1;
if (strncmp(value, "out", 3) == 0) {
*dir = GPIO_OUTPUT;
} else if (strncmp(value, "in", 2) == 0) {
*dir = GPIO_INPUT;
} else {
/*
* This should never happen because the content of /sys/class/gpio/gpioN/direction
* is set by the gpio controller (unless the driver is buggy)
*/
fprintf(stderr, "gpio: Invalid direction read from gpio %d.\n", gpio_pin);
return -1;
}
return 0;
}
/* void Arduino50::checkpoint()
* @param1: int checkpoint_id
* purpose: based on the checkpoint id, obtains the correct solution object
*/
void
Arduino50::checkpoint(int checkpoint_id)
{
// get the specific solution for this checkpoint
solution s = outputs[checkpoint_id];
// based on the ENUM to Solution.Type pairing, check the current input
switch(s.type)
{
case READ:
inputs[checkpoint_id] = check_read(s);
break;
case PIN:
inputs[checkpoint_id] = check_pin(s);
break;
case NUMBER:
inputs[checkpoint_id] = check_number(s);
break;
case MODE:
break;
default:
break;
}
}
int gpio_set_direction(uint8_t gpio_pin, uint8_t dir)
{
char str[4];
if (!check_pin(gpio_pin)) {
fprintf(stderr, "Cannot set direction to invalid pin %d\n", gpio_pin);
return -1;
}
/* Only strings "out" and "in" can be written to file /sys/class/gpio/gpioN/direction/ */
if (dir == GPIO_OUTPUT) {
/* Remove any existing IRQ on gpio */
if (write_str_gpio_file(gpio_pin, "edge", "none") < 0)
return -1;
strcpy(str, "out");
} else if (dir == GPIO_INPUT) {
strcpy(str, "in");
} else {
fprintf(stderr, "gpio: Cannot set gpio %d to invalid direction.\n", gpio_pin);
return -1;
}
if (!is_gpio_exported(gpio_pin)) {
fprintf(stderr, "gpio: Cannot set direction of uninitialised gpio %d\n", gpio_pin);
return -1;
}
return write_str_gpio_file(gpio_pin, "direction", str);
}
int gpio_release(uint8_t gpio_pin)
{
if (!check_pin(gpio_pin))
return -1;
if (!is_gpio_exported(gpio_pin))
return 0;
/* Write gpio index to /sys/class/gpio/unexport */
return unexport_pin(GPIO_DIR_BASE_PATH, gpio_pin);
}
int gpio_get_value(uint8_t gpio_pin, uint8_t *value)
{
if (!check_pin(gpio_pin))
return -1;
if (value == NULL) {
fprintf(stderr, "gpio: Cannot store value of pin %d to null variable.\n", gpio_pin);
return -1;
}
if (!is_gpio_exported(gpio_pin))
return 0;
/* The value returned by read_int_gpio_file is either 0 or 1 */
return read_int_gpio_file(gpio_pin, "value", value);
}
void bank_create_user(Bank* bank, char* args1, char* args2, char* args3) {
if (!args1 || !args2 || !args3) {
printf("Usage: create-user <user-name> <pin> <balance>\n");
return;
}
if (check_username(args1) != 0 || check_pin(args2) != 0
|| check_balance(args3) != 0) {
printf("Usage: create-user <user-name> <pin> <balance>\n");
return;
}
if ((char*)hash_table_find(bank->user_balance_ht, args1) != NULL) {
printf("Error: user %s already exists\n", args1);
return;
}
FILE *fp;
char card_name[MAX_CARD_NAME_SIZE + 1];
memset(card_name, 0, MAX_CARD_NAME_SIZE);
strcat(card_name, args1);
strcat(card_name, ".card");
fp = fopen(card_name, "w");
if (!fp) {
printf("Error creating card file for user %s\n", args1);
return;
}
printf("Created user %s\n", args1);
/* write to card*/
fprintf(fp, "%s\n", args1);
fprintf(fp, "%s\n", args2);
fclose(fp);
char* tmp;
tmp = (char*)malloc(64);
int len = strlen(args3);
if (len > 64) {
printf("Usage: create-user <user-name> <pin> <balance>\n");
return;
}
strncpy(tmp, args3, len);
hash_table_add(bank->user_balance_ht, args1, tmp);
}
int gpio_set_value(uint8_t gpio_pin, uint8_t value)
{
uint8_t dir;
if (!check_pin(gpio_pin))
return -1;
if (!is_gpio_exported(gpio_pin))
return 0;
if (gpio_get_direction(gpio_pin, &dir) < 0)
return -1;
if (dir == GPIO_INPUT) {
fprintf(stderr, "gpio: Cannot set value to an input.\n");
return -1;
}
/* Only write "0" or "1" to /sys/class/gpio/gpioN/value */
return write_int_gpio_file(gpio_pin, "value", value == 0 ? 0 : 1);
}
static void check_mode(gboolean ok, GAtResult *result, gpointer user_data)
{
GAtResultIter iter;
if (!ok) {
g_print("Checking modem mode failed\n");
exit(1);
}
g_at_result_iter_init(&iter, result);
g_at_result_iter_next(&iter, "+CFUN:");
g_at_result_iter_next_number(&iter, &oldmode);
g_print("Current modem mode is %d\n", oldmode);
if (oldmode == 1) {
check_pin(ok, result, user_data);
return;
}
g_at_chat_send(control, "AT+CFUN=1", NULL, check_pin, NULL, NULL);
}
int gpio_init(uint8_t gpio_pin)
{
if (!check_pin(gpio_pin))
return -1;
/* Ensure that PWM GPIO's are not used as PWM output at the same time */
switch (gpio_pin) {
case MIKROBUS_1_PWM:
pwm_release(MIKROBUS_1);
break;
case MIKROBUS_2_PWM:
pwm_release(MIKROBUS_2);
break;
}
/* Export a GPIO by writing its index to file /sys/class/gpio/export. */
if (!is_gpio_exported(gpio_pin)) {
if (export_pin(GPIO_DIR_BASE_PATH, gpio_pin) < 0)
return -1;
}
return gpio_set_direction(gpio_pin, GPIO_INPUT);
}
void bank_process_local_command(Bank *bank, char *command, size_t len)
{
char *comm = (char *)calloc(MAX_COMMAND_SIZE, sizeof(char));
char *name = (char *)calloc(MAX_COMMAND_SIZE, sizeof(char));
char *misc = (char *)calloc(MAX_COMMAND_SIZE, sizeof(char));
char *misc_two = (char *)calloc(MAX_COMMAND_SIZE, sizeof(char));
char temp_comm[MAX_LINE_SIZE];
char temp_name[MAX_LINE_SIZE];
char temp_misc[MAX_LINE_SIZE];
char temp_misc_two[MAX_LINE_SIZE];
if(strlen(command) >= MAX_LINE_SIZE)
{
printf("Invalid command\n");
return;
}
sscanf(command, "%s %s %s %s", temp_comm,temp_name,temp_misc,temp_misc_two);
if(strlen(temp_comm) < 1 || strlen(temp_comm) >= MAX_COMMAND_SIZE)
{
printf("Invalid command\n");
return;
}
strncpy(comm, temp_comm, strlen(temp_comm) + 1);
if(strcmp(comm, "create-user") == 0)
{
if(strlen(temp_name) < 1 || strlen(temp_misc) < 1 || strlen(temp_misc_two) < 1 || strlen(temp_name) >= MAX_NAME_SIZE)
{
printf("Usage: create-user <user-name> <pin> <balance>\n");
return;
}
strncpy(name, temp_name, strlen(temp_name) + 1);
if(check_username(name) == 0)
{
printf("Usage: create-user <user-name> <pin> <balance>\n");
return;
}
if(hash_table_find(bank->user_bal, name) != NULL)
{
printf("%s already exists\n", name);
return;
}
if(strlen(temp_misc) != 4 || strlen(temp_misc_two) > 10)
{
printf("Usage: create-user <user-name> <pin> <balance>\n");
return;
}
strncpy(misc, temp_misc, strlen(temp_misc) + 1);
if(check_pin(misc) == 0)
{
printf("Usage: create-user <user-name> <pin> <balance>\n");
return;
}
strncpy(misc_two, temp_misc_two, strlen(temp_misc_two) + 1);
if(check_bal(misc_two) == 0)
{
printf("Usage: create-user <user-name> <pin> <balance>\n");
return;
}
// create card
int filelen = strlen(name) + 6;
char cardfile[filelen];
memset(cardfile, '\0', filelen);
strncpy(cardfile, name, strlen(name));
strncat(cardfile, ".card", 5);
FILE *card = fopen(cardfile, "w");
if(card == NULL){
printf("Error creating card file for user %s\n", name);
remove(cardfile);
return;
}
unsigned char *buff = (unsigned char *)calloc(BLOCK_SIZE+1, sizeof(char));
do_crypt(bank, (unsigned char *)misc, buff, 1);
fputs((char *)buff, card);
fclose(card);
hash_table_add(bank->user_bal, name, misc_two); //username balance
hash_table_add(bank->user_pin, name, misc); //username pin
printf("Created user %s\n", name);
return;
}
else if(strcmp(comm, "deposit") == 0)
{
if(strlen(temp_name) < 1 || strlen(temp_misc) < 1 || strlen(temp_name) >= MAX_NAME_SIZE)
{
printf("Usage: deposit <user-name> <amt>\n");
return;
}
strncpy(name, temp_name, strlen(temp_name) + 1);
if(check_username(name) != 1 || strlen(temp_misc) > 10)
{
printf("Usage: deposit <user-name> <amt>\n");
return;
}
if(hash_table_find(bank->user_bal, name) == NULL)
{
printf("No such user\n");
return;
}
strncpy(misc, temp_misc, strlen(temp_misc) + 1);
if(check_bal(misc) == 0)
{
printf("Usage: deposit <user-name> <amt>\n");
return;
}
char *ptr;
char* curr_bal = (char*) hash_table_find(bank->user_bal, name);
unsigned int curr_bal_int = (unsigned int)strtoul(curr_bal, &ptr, 10);
unsigned int amt = (unsigned int)strtoul(misc, &ptr, 10);
unsigned int new_bal = (unsigned int)amt + (unsigned int)curr_bal_int;
//checks if new_bal was capped
if( new_bal > UINT_MAX || (new_bal - amt) != curr_bal_int || new_bal < curr_bal_int){
printf("Too rich for this program\n");
return;
}
char *new_bal_char = (char *)calloc(MAX_MISC_SIZE, sizeof(char));
sprintf(new_bal_char, "%u", new_bal);
hash_table_del(bank->user_bal, name);
hash_table_add(bank->user_bal, name, new_bal_char);
printf("$%s added to %s's account\n", misc, name);
return;
}
else if(strcmp(comm, "balance") == 0)
{
if(strlen(temp_name) < 1)
{
printf("Usage: balance <user-name>\n");
return;
}
if(strlen(temp_name) >= MAX_NAME_SIZE)
{
printf("Usage: balance <user-name>\n");
return;
}
strncpy(name, temp_name, strlen(temp_name) + 1);
if(check_username(name) != 1)
{
printf("Usage: balance <user-name>\n");
return;
}
char *curr_bal = (char *) hash_table_find(bank->user_bal, name);
if(curr_bal == NULL)
{
printf("No such user\n");
return;
}
printf("$%s\n", curr_bal);
return;
}
else
{
printf("Invalid command\n");
return;
}
}
/**
* Initialize the driver.
* \param drvthis Pointer to driver structure.
* \retval 0 Success.
* \retval -1 Error.
*/
int
hd_init_rpi(Driver *drvthis)
{
PrivateData *p = (PrivateData *) drvthis->private_data;
const int *allowed_gpio_pins = NULL;
int used_pins[GPIO_PINS] = {};
if ((allowed_gpio_pins = check_board_rev(drvthis)) == NULL)
return -1;
/* Get GPIO configuration */
p->rpi_gpio = malloc(sizeof(struct rpi_gpio_map));
if (p->rpi_gpio == NULL) {
report(RPT_ERR, "hd_init_rpi: unable to allocate memory");
return -1;
}
p->rpi_gpio->en = drvthis->config_get_int(drvthis->name, "pin_EN", 0, RPI_DEF_EN);
p->rpi_gpio->rs = drvthis->config_get_int(drvthis->name, "pin_RS", 0, RPI_DEF_RS);
p->rpi_gpio->d7 = drvthis->config_get_int(drvthis->name, "pin_D7", 0, RPI_DEF_D7);
p->rpi_gpio->d6 = drvthis->config_get_int(drvthis->name, "pin_D6", 0, RPI_DEF_D6);
p->rpi_gpio->d5 = drvthis->config_get_int(drvthis->name, "pin_D5", 0, RPI_DEF_D5);
p->rpi_gpio->d4 = drvthis->config_get_int(drvthis->name, "pin_D4", 0, RPI_DEF_D4);
debug(RPT_INFO, "hd_init_rpi: Pin EN mapped to GPIO%d", p->rpi_gpio->en);
debug(RPT_INFO, "hd_init_rpi: Pin RS mapped to GPIO%d", p->rpi_gpio->rs);
debug(RPT_INFO, "hd_init_rpi: Pin D4 mapped to GPIO%d", p->rpi_gpio->d4);
debug(RPT_INFO, "hd_init_rpi: Pin D5 mapped to GPIO%d", p->rpi_gpio->d5);
debug(RPT_INFO, "hd_init_rpi: Pin D6 mapped to GPIO%d", p->rpi_gpio->d6);
debug(RPT_INFO, "hd_init_rpi: Pin D7 mapped to GPIO%d", p->rpi_gpio->d7);
if (check_pin(drvthis, p->rpi_gpio->en, allowed_gpio_pins, used_pins) ||
check_pin(drvthis, p->rpi_gpio->rs, allowed_gpio_pins, used_pins) ||
check_pin(drvthis, p->rpi_gpio->d7, allowed_gpio_pins, used_pins) ||
check_pin(drvthis, p->rpi_gpio->d6, allowed_gpio_pins, used_pins) ||
check_pin(drvthis, p->rpi_gpio->d5, allowed_gpio_pins, used_pins) ||
check_pin(drvthis, p->rpi_gpio->d4, allowed_gpio_pins, used_pins)) {
free(p->rpi_gpio);
return -1;
}
if (p->numDisplays > 1) { /* For displays with two controllers */
p->rpi_gpio->en2 = drvthis->config_get_int(drvthis->name, "pin_EN2", 0, RPI_DEF_EN2);
debug(RPT_INFO, "hd_init_rpi: Pin EN2 mapped to GPIO%d", p->rpi_gpio->en2);
if (check_pin(drvthis, p->rpi_gpio->en2, allowed_gpio_pins, used_pins)) {
free(p->rpi_gpio);
return -1;
}
}
if (p->have_backlight) { /* Backlight setup is optional */
p->backlight_bit = drvthis->config_get_int(drvthis->name, "pin_BL", 0, RPI_DEF_BL);
debug(RPT_INFO, "hd_init_rpi: Backlight mapped to GPIO%d", p->backlight_bit);
if (check_pin(drvthis, p->backlight_bit, allowed_gpio_pins, used_pins) != 0) {
report(RPT_WARNING, "hd_init_rpi: Invalid backlight configuration - disabling backlight");
p->have_backlight = 0;
}
}
/* Now that configuration should be correct, set up the GPIO pins */
if (setup_io(drvthis) < 0) {
report(RPT_ERR, "hd_init_rpi: Failed to set up GPIO");
free(p->rpi_gpio);
return -1;
}
setup_gpio(drvthis, p->rpi_gpio->en);
setup_gpio(drvthis, p->rpi_gpio->rs);
setup_gpio(drvthis, p->rpi_gpio->d7);
setup_gpio(drvthis, p->rpi_gpio->d6);
setup_gpio(drvthis, p->rpi_gpio->d5);
setup_gpio(drvthis, p->rpi_gpio->d4);
p->hd44780_functions->senddata = lcdrpi_HD44780_senddata;
p->hd44780_functions->close = lcdrpi_HD44780_close;
if (p->have_backlight) {
setup_gpio(drvthis, p->backlight_bit);
p->hd44780_functions->backlight = lcdrpi_HD44780_backlight;
}
if (p->numDisplays > 1) {
setup_gpio(drvthis, p->rpi_gpio->en2);
}
/* Setup the lcd in 4 bit mode: Send (FUNCSET | IF_8BIT) three times
* followed by (FUNCSET | IF_4BIT) using four nibbles. Timing is not
* exactly what is required by HD44780. */
p->hd44780_functions->senddata(p, 0, RS_INSTR, 0x33);
p->hd44780_functions->uPause(p, 4100);
p->hd44780_functions->senddata(p, 0, RS_INSTR, 0x32 );
p->hd44780_functions->uPause(p, 150);
common_init(p, IF_4BIT);
return 0;
}