/* 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 .
*
*/
/** BusVoodoo 1-wire mode (code)
* @file busvoodoo_onewire.c
* @author King Kévin
* @date 2018
* @note peripherals used: timer @ref onewire_master_timer
*/
/* standard libraries */
#include // standard integer types
#include // standard utilities
#include // string utilities
/* STM32 (including CM3) libraries */
#include // real-time control clock library
#include // general purpose input output library
#include // timer library
/* own libraries */
#include "global.h" // board definitions
#include "print.h" // printing utilities
#include "menu.h" // menu definitions
#include "onewire_master.h" // 1-wire methods
#include "busvoodoo_global.h" // BusVoodoo definitions
#include "busvoodoo_oled.h" // OLED utilities
#include "busvoodoo_onewire.h" // own definitions
/** mode setup stage */
static enum busvoodoo_onewire_setting_t {
BUSVOODOO_ONEWIRE_SETTING_NONE,
BUSVOODOO_ONEWIRE_SETTING_PULLUP,
BUSVOODOO_ONEWIRE_SETTING_POWER,
BUSVOODOO_ONEWIRE_SETTING_DONE,
} busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_NONE; /**< current mode setup stage */
/** if embedded pull-up resistors are used */
static bool busvoodoo_onewire_embedded_pullup = true;
/** time (in ms) between slot to provide power */
static bool busvoodoo_onewire_power = false;
/** setup 1-wire mode
* @param[out] prefix terminal prompt prefix
* @param[in] line terminal prompt line to configure mode
* @return if setup is complete
*/
static bool busvoodoo_onewire_setup(char** prefix, const char* line)
{
bool complete = false; // is the setup complete
if (NULL==line) { // first call
busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_NONE; // re-start configuration
}
switch (busvoodoo_onewire_setting) {
case BUSVOODOO_ONEWIRE_SETTING_NONE:
busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_PULLUP; // go to first setting
printf("1) use embedded pull-up resistor (2kO)\n");
printf("2) use external pull-up resistor\n");
snprintf(busvoodoo_global_string, LENGTH(busvoodoo_global_string), "pull-up mode (1,2) [%c]", busvoodoo_onewire_embedded_pullup ? '1' : '2'); // show pull-up setting
*prefix = busvoodoo_global_string; // display next setting
break;
case BUSVOODOO_ONEWIRE_SETTING_PULLUP:
if (NULL==line || 0==strlen(line)) { // use default setting
busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_POWER; // go to next setting
} else if (1==strlen(line)) { // setting provided
uint8_t pullup = atoi(line); // parse setting
if (1==pullup || 2==pullup) { // check setting
busvoodoo_onewire_embedded_pullup = (1==pullup); // remember setting
busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_POWER; // go to next setting
}
}
if (BUSVOODOO_ONEWIRE_SETTING_POWER==busvoodoo_onewire_setting) {
printf("1) don't drive 1-wire data line (target uses external or parasitic power)\n");
printf("2) power 1-wire data line at 3.3V when not communicating (not multi-master compatible)\n");
snprintf(busvoodoo_global_string, LENGTH(busvoodoo_global_string), "power source (1,2) [%c]", busvoodoo_onewire_power ? '2' : '1'); // show power setting
*prefix = busvoodoo_global_string; // display next setting
}
break;
case BUSVOODOO_ONEWIRE_SETTING_POWER:
if (NULL==line || 0==strlen(line)) { // use default setting
busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_DONE; // go to next setting
} else if (1==strlen(line)) { // setting provided
uint8_t power = atoi(line); // parse setting
if (1==power || 2==power) { // check setting
busvoodoo_onewire_power = (1==power); // remember setting
busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_DONE; // go to next setting
}
}
if (BUSVOODOO_ONEWIRE_SETTING_DONE==busvoodoo_onewire_setting) { // we have all settings, configure SPI
onewire_master_setup(); // setup 1-wire
if (busvoodoo_onewire_power) {
gpio_set_mode(GPIO(ONEWIRE_MASTER_PORT), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(ONEWIRE_MASTER_PIN)); // provide power (external pull-up resistor is still require for communication)
}
if (busvoodoo_onewire_embedded_pullup) {
if (!busvoodoo_onewire_power) {
busvoodoo_embedded_pullup(true); // set embedded pull-ups
}
printf("use LV to set pull-up voltage\n");
}
busvoodoo_led_blue_off(); // disable blue LED because there is no activity
busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_NONE; // restart settings next time
*prefix = "1-Wire"; // display mode
busvoodoo_oled_text_left(*prefix); // set mode title on OLED display
const char* pinout_io[10] = {"GND", "5V", "3V3", "LV", NULL, "1WR", NULL, NULL, NULL, NULL}; // 1-wire mode pinout
for (uint8_t i=0; i='0' && action[1]<='9') { // send decimal
return busvoodoo_onewire_action(action+1, repetition, perform); // just retry without leading 0
} else { // malformed action
return false;
}
} else if ('x'==action[0] && length>1) { // send hexadecimal value
for (uint32_t i=1; i='0' && action[i]<='9') || (action[i]>='a' && action[i]<='f') || (action[i]>='A' && action[i]<='F'))) { // check for hexadecimal character
return false; // not an hexadecimal string
}
}
if (!perform) {
return true;
}
uint32_t value = strtol(&action[1], NULL, 16); // get hex value
for (uint32_t i=0; i1) { // send binary value
for (uint32_t i=1; i'1') { // check for binary character
return false; // not a binary string
}
}
if (!perform) {
return true;
}
uint32_t value = strtol(&action[1], NULL, 2); // get binary value
for (uint32_t i=0; i='1' && action[0]<='9') { // send decimal value
for (uint32_t i=1; i'9') { // check for decimal character
return false; // not a decimal string
}
}
if (!perform) {
return true;
}
uint32_t value = strtol(&action[0], NULL, 10); // get decimal value
for (uint32_t i=0; i=2 && ('"'==action[0] || '\''==action[0]) && (action[length-1]==action[0])) { // send ASCII character
if (!perform) {
return true;
}
for (uint32_t r=0; r