diff --git a/lib/busvoodoo_onewire.c b/lib/busvoodoo_onewire.c
new file mode 100644
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+++ b/lib/busvoodoo_onewire.c
@@ -0,0 +1,390 @@
+/* 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.
+ *
+ */
+/** BusVoodoo 1-wire mode (API)
+ * @file busvoodoo_onewire.h
+ * @author King Kévin
+ * @date 2018
+ * @note peripherals used: timer @ref onewire_master_timer
+ */
+
+/** 1-wire mode interface definition */
+extern const struct busvoodoo_mode_t busvoodoo_onewire_mode;