add open/send/close, fix disable echo, use memcmp instead of memmem
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a84484d215
commit
1f895138b1
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@ -23,6 +23,7 @@
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#include <stdint.h> // standard integer types
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#include <stdint.h> // standard integer types
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#include <stdlib.h> // general utilities
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#include <stdlib.h> // general utilities
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#include <string.h> // string and memory utilities
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#include <string.h> // string and memory utilities
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#include <stdio.h> // string utilities
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/* STM32 (including CM3) libraries */
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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/rcc.h> // real-time control clock library
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@ -49,6 +50,25 @@ static volatile uint16_t tx_used = 0; /**< number of bytes used in transmit buff
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volatile bool radio_esp8266_activity = false;
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volatile bool radio_esp8266_activity = false;
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volatile bool radio_esp8266_success = false;
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volatile bool radio_esp8266_success = false;
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/** transmit data to radio
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* @param[in] data data to transmit
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* @param[in] length length of data to transmit
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*/
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static void radio_esp8266_transmit(uint8_t* data, uint8_t length) {
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while (tx_used || !usart_get_flag(USART(RADIO_ESP8266_USART), USART_SR_TXE)) { // wait until ongoing transmission completed
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usart_enable_tx_interrupt(USART(RADIO_ESP8266_USART)); // enable transmit interrupt
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__WFI(); // sleep until something happened
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}
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usart_disable_tx_interrupt(USART(RADIO_ESP8266_USART)); // ensure transmit interrupt is disable to prevent index corruption (the ISR should already have done it)
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radio_esp8266_activity = false; // reset status because of new activity
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for (tx_used=0; tx_used<length && tx_used<LENGTH(tx_buffer); tx_used++) { // copy data
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tx_buffer[tx_used] = data[length-1-tx_used]; // put character in buffer (in reverse order)
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}
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if (tx_used) {
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usart_enable_tx_interrupt(USART(RADIO_ESP8266_USART)); // enable interrupt to send bytes
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}
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}
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void radio_esp8266_setup(void)
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void radio_esp8266_setup(void)
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{
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{
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/* enable USART I/O peripheral */
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/* enable USART I/O peripheral */
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@ -77,38 +97,53 @@ void radio_esp8266_setup(void)
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radio_esp8266_activity = false;
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radio_esp8266_activity = false;
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radio_esp8266_success = false;
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radio_esp8266_success = false;
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radio_esp8266_send((uint8_t*)"AT\r\n",4); // verify if module is present
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radio_esp8266_transmit((uint8_t*)"AT\r\n",4); // verify if module is present
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while (!radio_esp8266_activity || !radio_esp8266_success) { // wait for response
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while (!radio_esp8266_activity || !radio_esp8266_success) { // wait for response
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__WFI(); // sleep until something happened
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__WFI(); // sleep until something happened
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}
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}
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radio_esp8266_send((uint8_t*)"AT+RST\r\n",8); // reset module
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radio_esp8266_transmit((uint8_t*)"AT+RST\r\n",8); // reset module
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while (!radio_esp8266_activity || !radio_esp8266_success) { // wait for response
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while (!radio_esp8266_activity || !radio_esp8266_success) { // wait for response
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__WFI(); // sleep until something happened
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__WFI(); // sleep until something happened
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}
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}
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radio_esp8266_send((uint8_t*)"ATE0\r\n",6); // disable echoing
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while(rx_used<13 || memcmp((char*)&rx_buffer[rx_used-13], "WIFI GOT IP\r\n", 13)!=0) { // wait to have IP
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while (!radio_esp8266_activity || !radio_esp8266_success) { // wait for response
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__WFI(); // sleep until something happened
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}
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while(rx_used<13 || !memmem((char*)rx_buffer, rx_used, "WIFI GOT IP\r\n", 13)) { // wait to have IP
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__WFI(); // sleep until something happened
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__WFI(); // sleep until something happened
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}
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}
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radio_esp8266_transmit((uint8_t*)"ATE0\r\n",6); // disable echoing
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while (!radio_esp8266_activity || !radio_esp8266_success) { // wait for response
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__WFI(); // sleep until something happened
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}
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}
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}
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void radio_esp8266_send(uint8_t* data, uint8_t length) {
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void radio_esp8266_tcp_open(char* host, uint16_t port)
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while (tx_used || !usart_get_flag(USART(RADIO_ESP8266_USART), USART_SR_TXE)) { // wait until ongoing transmission completed
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{
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usart_enable_tx_interrupt(USART(RADIO_ESP8266_USART)); // enable transmit interrupt
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char command[256] = {0}; // string to create command
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__WFI(); // sleep until something happened
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int length = snprintf(command, LENGTH(command), "AT+CIPSTART=\"TCP\",\"%s\",%u\r\n", host, port); // create AT command to establish a TCP connection
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if (length>0) {
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radio_esp8266_transmit((uint8_t*)command, length);
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}
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}
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usart_disable_tx_interrupt(USART(RADIO_ESP8266_USART)); // ensure transmit interrupt is disable to prevent index corruption (the ISR should already have done it)
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}
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radio_esp8266_activity = false; // reset status because of new activity
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for (tx_used=0; tx_used<length && tx_used<LENGTH(tx_buffer); tx_used++) { // copy data
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void radio_esp8266_send(uint8_t* data, uint8_t length)
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tx_buffer[tx_used] = data[length-1-tx_used]; // put character in buffer (in reverse order)
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{
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}
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char command[16+1] = {0}; // string to create command
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if (tx_used) {
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int command_length = snprintf(command, LENGTH(command), "AT+CIPSEND=%u\r\n", length); // create AT command to send data
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usart_enable_tx_interrupt(USART(RADIO_ESP8266_USART)); // enable interrupt to send bytes
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if (command_length>0) {
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radio_esp8266_transmit((uint8_t*)command, command_length); // transmit AT command
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while (!radio_esp8266_activity || !radio_esp8266_success) { // wait for response
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__WFI(); // sleep until something happened
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}
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if (!radio_esp8266_success) { // send AT command did not succeed
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return; // don't transmit data
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}
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radio_esp8266_transmit(data, length); // transmit data
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}
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}
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}
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}
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void radio_esp8266_close(void)
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{
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radio_esp8266_transmit((uint8_t*)"AT+CIPCLOSE\r\n", 13); // send AT command to close established connection
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}
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/** USART interrupt service routine called when data has been transmitted or received */
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/** USART interrupt service routine called when data has been transmitted or received */
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void USART_ISR(RADIO_ESP8266_USART)(void)
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void USART_ISR(RADIO_ESP8266_USART)(void)
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{
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{
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@ -126,13 +161,12 @@ void USART_ISR(RADIO_ESP8266_USART)(void)
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rx_used--; // update used buffer information
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rx_used--; // update used buffer information
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}
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}
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rx_buffer[rx_used++] = usart_recv(USART(RADIO_ESP8266_USART)); // put character in buffer
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rx_buffer[rx_used++] = usart_recv(USART(RADIO_ESP8266_USART)); // put character in buffer
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// if the used send a packet with these strings during the commands I'm fucked (AT commands are hard to handle perfectly)
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// if the used send a packet with these strings during the commands detection the AT command response will break (AT commands are hard to handle perfectly)
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// ideally memmem would not be done in ISR (takes quite long)
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if (rx_used>=4 && memcmp((char*)&rx_buffer[rx_used-4], "OK\r\n", 4)==0) { // OK received
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if (rx_used>=4 && memmem((char*)rx_buffer, rx_used, "OK\r\n", 4)) { // OK received
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radio_esp8266_activity = true; // response received
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radio_esp8266_activity = true; // response received
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radio_esp8266_success = true; // command succeeded
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radio_esp8266_success = true; // command succeeded
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rx_used = 0; // reset buffer
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rx_used = 0; // reset buffer
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} else if (rx_used>=7 && memmem((char*)rx_buffer, rx_used, "ERROR\r\n", 7)) { // ERROR received
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} else if (rx_used>=7 && memcmp((char*)&rx_buffer[rx_used-7], "ERROR\r\n", 7)==0) { // ERROR received
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radio_esp8266_activity = true; // response received
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radio_esp8266_activity = true; // response received
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radio_esp8266_success = false; // command failed
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radio_esp8266_success = false; // command failed
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rx_used = 0; // reset buffer
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rx_used = 0; // reset buffer
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@ -34,7 +34,7 @@ void radio_esp8266_setup(void);
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* @param[in] port TCP port to connect to
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* @param[in] port TCP port to connect to
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* @note wait for activity to get success status
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* @note wait for activity to get success status
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*/
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*/
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void radio_esp8266_tcp_open(char* host, uint32_t port);
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void radio_esp8266_tcp_open(char* host, uint16_t port);
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/** send data (requires established connection)
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/** send data (requires established connection)
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* @param[in] data data to send
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* @param[in] data data to send
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* @param[in] length size of data to send
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* @param[in] length size of data to send
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