BV 1-Wire: add 1-Wire mode
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/* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/** BusVoodoo 1-wire mode (code)
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* @file busvoodoo_onewire.c
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* @author King Kévin <kingkevin@cuvoodoo.info>
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* @date 2018
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* @note peripherals used: timer @ref onewire_master_timer
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*/
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/* standard libraries */
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#include <stdint.h> // standard integer types
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#include <stdlib.h> // standard utilities
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#include <string.h> // string utilities
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/* STM32 (including CM3) libraries */
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#include <libopencm3/stm32/rcc.h> // real-time control clock library
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#include <libopencm3/stm32/gpio.h> // general purpose input output library
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#include <libopencm3/stm32/timer.h> // timer library
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/* own libraries */
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#include "global.h" // board definitions
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#include "print.h" // printing utilities
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#include "menu.h" // menu definitions
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#include "onewire_master.h" // 1-wire methods
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#include "busvoodoo_global.h" // BusVoodoo definitions
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#include "busvoodoo_oled.h" // OLED utilities
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#include "busvoodoo_onewire.h" // own definitions
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/** mode setup stage */
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static enum busvoodoo_onewire_setting_t {
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BUSVOODOO_ONEWIRE_SETTING_NONE,
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BUSVOODOO_ONEWIRE_SETTING_PULLUP,
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BUSVOODOO_ONEWIRE_SETTING_POWER,
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BUSVOODOO_ONEWIRE_SETTING_DONE,
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} busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_NONE; /**< current mode setup stage */
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/** if embedded pull-up resistors are used */
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static bool busvoodoo_onewire_embedded_pullup = true;
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/** time (in ms) between slot to provide power */
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static bool busvoodoo_onewire_power = false;
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/** setup 1-wire mode
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* @param[out] prefix terminal prompt prefix
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* @param[in] line terminal prompt line to configure mode
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* @return if setup is complete
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*/
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static bool busvoodoo_onewire_setup(char** prefix, const char* line)
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{
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bool complete = false; // is the setup complete
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if (NULL==line) { // first call
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busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_NONE; // re-start configuration
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}
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switch (busvoodoo_onewire_setting) {
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case BUSVOODOO_ONEWIRE_SETTING_NONE:
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busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_PULLUP; // go to first setting
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printf("1) use embedded pull-up resistor (2kO)\n");
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printf("2) use external pull-up resistor\n");
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snprintf(busvoodoo_global_string, LENGTH(busvoodoo_global_string), "pull-up mode (1,2) [%c]", busvoodoo_onewire_embedded_pullup ? '1' : '2'); // show pull-up setting
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*prefix = busvoodoo_global_string; // display next setting
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break;
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case BUSVOODOO_ONEWIRE_SETTING_PULLUP:
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if (NULL==line || 0==strlen(line)) { // use default setting
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busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_POWER; // go to next setting
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} else if (1==strlen(line)) { // setting provided
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uint8_t pullup = atoi(line); // parse setting
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if (1==pullup || 2==pullup) { // check setting
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busvoodoo_onewire_embedded_pullup = (1==pullup); // remember setting
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busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_POWER; // go to next setting
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}
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}
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if (BUSVOODOO_ONEWIRE_SETTING_POWER==busvoodoo_onewire_setting) {
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printf("1) don't drive 1-wire data line (target uses external or parasitic power)\n");
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printf("2) power 1-wire data line at 3.3V when not communicating (not multi-master compatible)\n");
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snprintf(busvoodoo_global_string, LENGTH(busvoodoo_global_string), "power source (1,2) [%c]", busvoodoo_onewire_power ? '2' : '1'); // show power setting
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*prefix = busvoodoo_global_string; // display next setting
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}
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break;
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case BUSVOODOO_ONEWIRE_SETTING_POWER:
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if (NULL==line || 0==strlen(line)) { // use default setting
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busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_DONE; // go to next setting
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} else if (1==strlen(line)) { // setting provided
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uint8_t power = atoi(line); // parse setting
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if (1==power || 2==power) { // check setting
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busvoodoo_onewire_power = (1==power); // remember setting
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busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_DONE; // go to next setting
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}
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}
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if (BUSVOODOO_ONEWIRE_SETTING_DONE==busvoodoo_onewire_setting) { // we have all settings, configure SPI
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onewire_master_setup(); // setup 1-wire
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if (busvoodoo_onewire_power) {
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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)
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}
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if (busvoodoo_onewire_embedded_pullup) {
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if (!busvoodoo_onewire_power) {
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busvoodoo_embedded_pullup(true); // set embedded pull-ups
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}
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printf("use LV to set pull-up voltage\n");
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}
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busvoodoo_led_blue_off(); // disable blue LED because there is no activity
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busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_NONE; // restart settings next time
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*prefix = "1-Wire"; // display mode
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busvoodoo_oled_text_left(*prefix); // set mode title on OLED display
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const char* pinout_io[10] = {"GND", "5V", "3V3", "LV", NULL, "1WR", NULL, NULL, NULL, NULL}; // 1-wire mode pinout
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for (uint8_t i=0; i<LENGTH(pinout_io) && i<LENGTH(busvoodoo_global_pinout_io); i++) {
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busvoodoo_global_pinout_io[i] = pinout_io[i]; // set pin names
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}
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if (busvoodoo_full) {
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const char* pinout_rscan[5] = {"HV", NULL, NULL, NULL, NULL}; // HiZ mode RS/CAN pinout
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for (uint8_t i=0; i<LENGTH(pinout_rscan) && i<LENGTH(busvoodoo_global_pinout_rscan); i++) {
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busvoodoo_global_pinout_rscan[i] = pinout_rscan[i]; // set pin names
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}
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}
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busvoodoo_oled_text_pinout(pinout_io, true); // set pinout on display
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busvoodoo_oled_update(); // update display to show text and pinout
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complete = true; // configuration is complete
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}
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break;
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default: // unknown case
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busvoodoo_onewire_setting = BUSVOODOO_ONEWIRE_SETTING_NONE; // restart settings next time
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break;
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}
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return complete;
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}
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/** write to 1-wire
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* @param[in] value value to write
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*/
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static void busvoodoo_onewire_write(uint8_t value)
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{
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printf("write: 0x%02x", value);
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busvoodoo_led_blue_pulse(BUSVOODOO_LED_PULSE); // pulse blue LED to show we are writing
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if (!onewire_master_write_byte(value)) { // send data bytes
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printf(" (error)");
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}
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printf("\n");
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}
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/** read from 1-wire
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*/
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static void busvoodoo_onewire_read(void)
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{
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uint8_t data; // buffer to read data
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busvoodoo_led_blue_pulse(BUSVOODOO_LED_PULSE); // pulse blue LED to show we are reading
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bool error = onewire_master_read_byte(&data); // read byte
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printf("read: 0x%02x%s\n", data, error ? "" : " (error)");
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}
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/** exit 1-wire mode
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*/
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static void busvoodoo_onewire_exit(void)
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{
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onewire_master_release(); // release peripheral
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busvoodoo_embedded_pullup(false); // disable embedded pull-ups
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}
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/** perform 1-wire action
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* @param[in] action action to perform
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* @param[in] repetition how many times to perform the action
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* @param[in] perform the action (true) or just check it (false)
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* @return true if the action has been performed, false if it is malformed
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*/
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static bool busvoodoo_onewire_action(const char* action, uint32_t repetition, bool perform)
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{
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uint32_t length = strlen(action); // remember length since it will be used a number of times
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if (NULL==action || 0==length) { // there is nothing to do
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return true;
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}
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if (1==length && 'r'==action[0]) { // read data
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if (!perform) {
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return true;
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}
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for (uint32_t i=0; i<repetition; i++) {
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busvoodoo_onewire_read(); // read from 1-wire
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}
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} else if (1==length && '['==action[0]) { // start transaction with slave presence detection
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if (!perform) {
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return true;
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}
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if (busvoodoo_onewire_power) {
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gpio_set_mode(GPIO(ONEWIRE_MASTER_PORT), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_OPENDRAIN, GPIO(ONEWIRE_MASTER_PIN)); // remove power from data line
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}
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if (!gpio_get(GPIO(ONEWIRE_MASTER_PORT), GPIO(ONEWIRE_MASTER_PIN))) {
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printf("WARNING: data line does not seem to be pulled up\n");
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}
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printf("start transaction: ");
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bool presence = onewire_master_reset(); // send reset pulse and detect slave presence
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printf("slave presence %sdetected\n", presence ? "" : "not ");
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} else if (1==length && ']'==action[0]) { // stop transaction
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if (!perform) {
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return true;
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}
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printf("end transaction%s\n", busvoodoo_onewire_power ? " and provide power on data line" : "");
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if (busvoodoo_onewire_power) {
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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)
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}
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} else if (1==length && 'u'==action[0]) { // sleep us
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if (!perform) {
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return true;
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}
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printf("wait for %u us\n", repetition);
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sleep_us(repetition); // sleep
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} else if (1==length && 'm'==action[0]) { // sleep ms
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if (!perform) {
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return true;
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}
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printf("wait for %u ms\n", repetition);
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sleep_ms(repetition); // sleep
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} else if ('0'==action[0]) { // send digit
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if (1==length) { // just send 0
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if (!perform) {
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return true;
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}
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for (uint32_t i=0; i<repetition; i++) {
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busvoodoo_onewire_write(0); // write to SPI
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}
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} else if ('x'==action[1] || 'b'==action[1]) { // send hex/binary
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return busvoodoo_onewire_action(action+1, repetition, perform); // just retry without leading 0
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} else if (action[1]>='0' && action[1]<='9') { // send decimal
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return busvoodoo_onewire_action(action+1, repetition, perform); // just retry without leading 0
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} else { // malformed action
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return false;
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}
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} else if ('x'==action[0] && length>1) { // send hexadecimal value
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for (uint32_t i=1; i<length; i++) { // check string
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if (!((action[i]>='0' && action[i]<='9') || (action[i]>='a' && action[i]<='f') || (action[i]>='A' && action[i]<='F'))) { // check for hexadecimal character
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return false; // not an hexadecimal string
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}
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}
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if (!perform) {
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return true;
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}
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uint32_t value = strtol(&action[1], NULL, 16); // get hex value
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for (uint32_t i=0; i<repetition; i++) {
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busvoodoo_onewire_write(value); // write to SPI
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}
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} else if ('b'==action[0] && length>1) { // send binary value
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for (uint32_t i=1; i<length; i++) { // check string
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if (action[i]<'0' || action[i]>'1') { // check for binary character
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return false; // not a binary string
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}
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}
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if (!perform) {
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return true;
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}
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uint32_t value = strtol(&action[1], NULL, 2); // get binary value
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for (uint32_t i=0; i<repetition; i++) {
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busvoodoo_onewire_write(value); // write to SPI
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}
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} else if (action[0]>='1' && action[0]<='9') { // send decimal value
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for (uint32_t i=1; i<length; i++) { // check string
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if (action[i]<'0' || action[i]>'9') { // check for decimal character
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return false; // not a decimal string
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}
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}
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if (!perform) {
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return true;
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}
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uint32_t value = strtol(&action[0], NULL, 10); // get decimal value
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for (uint32_t i=0; i<repetition; i++) {
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busvoodoo_onewire_write(value); // write to SPI
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}
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} else if (length>=2 && ('"'==action[0] || '\''==action[0]) && (action[length-1]==action[0])) { // send ASCII character
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if (!perform) {
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return true;
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}
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for (uint32_t r=0; r<repetition; r++) {
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for (uint32_t i=1; i<length-1; i++) { // go through string
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busvoodoo_onewire_write(action[i]); // write to SPI
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}
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}
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} else { // malformed action
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return false;
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}
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return true; // all went well
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}
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// command handlers
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/** command to perform actions
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* @param[in] argument actions to perform
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*/
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static void busvoodoo_onewire_command_actions(void* argument)
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{
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if (NULL==argument || 0==strlen(argument)) {
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printf("available actions (separated by space or ,):\n");
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printf("[\tstart transaction: send reset pulse and detect slave presence\n");
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printf("]\tend transaction%s\n", busvoodoo_onewire_power ? " and provide power on data line" : "");
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printf("0\twrite decimal byte\n");
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printf("0x0\twrite hexadecimal byte\n");
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printf("0b0\twrite binary byte\n");
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printf("\"a\"/'a'\twrite ASCII characters\n");
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printf("r\tread byte\n");
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printf("u/m\twait 1 us/ms\n");
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printf(":n\trepeat action n times\n");
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return;
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}
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// copy argument since it will be modified
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char* copy = calloc(strlen(argument)+1, sizeof(char));
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if (!copy) {
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while (true);
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}
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strncpy(copy, argument, strlen(argument)+1);
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// verify and perform actions
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if (!busvoodoo_global_actions(copy, false, &busvoodoo_onewire_action)) { // verify actions
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printf("malformed action(s)\n");
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} else { // action are OK
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busvoodoo_global_actions(argument, true, &busvoodoo_onewire_action); // perform action
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}
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free(copy); // release memory
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}
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/** command to perform ROM search
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* @param[in] argument if only ROMs with alarms should be searched
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*/
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static void busvoodoo_onewire_rom_search(void* argument)
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{
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bool alarm = false; // if only ROMs with alarms should be searched
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if (argument && 0==strcmp(argument, "alarm")) {
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alarm = true;
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}
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if (busvoodoo_onewire_power) {
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gpio_set_mode(GPIO(ONEWIRE_MASTER_PORT), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_OPENDRAIN, GPIO(ONEWIRE_MASTER_PIN)); // remove power from data line
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}
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if (!gpio_get(GPIO(ONEWIRE_MASTER_PORT), GPIO(ONEWIRE_MASTER_PIN))) {
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printf("WARNING: data line does not seem to be pulled up\n");
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}
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bool presence = onewire_master_reset(); // send reset pulse and detect slave presence
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printf("slave presence %sdetected\n", presence ? "" : "not ");
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if (presence) { // only search if a slave presence has been detected
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uint64_t code = 0; // code found
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uint64_t codes = 0; // number of codes found
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printf("searching ROM codes%s:\n", alarm ? " with alarm" : "");
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bool next; // if another ROM code is detected
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do { // search until all has been found
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busvoodoo_led_blue_pulse(BUSVOODOO_LED_PULSE); // pulse blue LED to show we are scanning
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next = onewire_master_rom_search(&code, alarm); // search for the code
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if (next) {
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presence = onewire_master_reset(); // send reset pulse and detect slave presence for the next slave
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}
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printf("0x%016X\n", code);
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codes++; // remember we found a code
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} while (presence && next);
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printf("%U ROM code(s)%s found\n", codes, alarm ? " with alarm" : "");
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}
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if (busvoodoo_onewire_power) {
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gpio_set_mode(GPIO(ONEWIRE_MASTER_PORT), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(ONEWIRE_MASTER_PIN)); // provide power on data line
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}
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}
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/** 1-wire menu commands */
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static const struct menu_command_t busvoodoo_onewire_commands[] = {
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{
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.shortcut = 'a',
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.name = "action",
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.command_description = "perform protocol actions",
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.argument = MENU_ARGUMENT_STRING,
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.argument_description = "[actions]",
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.command_handler = &busvoodoo_onewire_command_actions,
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},
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{
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.shortcut = 's',
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.name = "search",
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.command_description = "perform ROM search",
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.argument = MENU_ARGUMENT_STRING,
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.argument_description = "[alarm]",
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.command_handler = &busvoodoo_onewire_rom_search,
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},
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};
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const struct busvoodoo_mode_t busvoodoo_onewire_mode = {
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.name = "1-wire",
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.description = "1-Wire",
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.full_only = false,
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.setup = &busvoodoo_onewire_setup,
|
||||
.commands = busvoodoo_onewire_commands,
|
||||
.commands_nb = LENGTH(busvoodoo_onewire_commands),
|
||||
.exit = &busvoodoo_onewire_exit,
|
||||
};
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
/* 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 <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
*/
|
||||
/** BusVoodoo 1-wire mode (API)
|
||||
* @file busvoodoo_onewire.h
|
||||
* @author King Kévin <kingkevin@cuvoodoo.info>
|
||||
* @date 2018
|
||||
* @note peripherals used: timer @ref onewire_master_timer
|
||||
*/
|
||||
|
||||
/** 1-wire mode interface definition */
|
||||
extern const struct busvoodoo_mode_t busvoodoo_onewire_mode;
|
||||
Loading…
Reference in New Issue