defines for GPIO pin assignments; version string

.gitignore

@@ -6,4 +6,6 @@ webpages.espfs
 espfs/espfstest/*.o
 espfs/espfstest/espfstest
 *.DS_Store
-html_compressed/
+html_compressed/
+esp-link.tgz
+tve-patch/

Makefile

@@ -1,3 +1,63 @@
+#
+# Makefile for esp-link - https://github.com/jeelabs/esp-link
+#
+# Start by setting the directories for the toolchain a few lines down
+# the default target will build the firmware images
+# `make flash` will flash the esp serially
+# `make wiflash` will flash the esp over wifi
+# `VERBOSE=1 make ...` will print debug info
+# `ESP_HOSTNAME=my.esp.example.com make wiflash` is an easy way to override a variable
+#
+# Makefile heavily adapted to esp-link and wireless flashing by Thorsten von Eicken
+# Original from esphttpd and others...
+
+# --------------- toolchain configuration ---------------
+
+# Base directory for the compiler. Needs a / at the end.
+# Typically you'll install https://github.com/pfalcon/esp-open-sdk
+XTENSA_TOOLS_ROOT ?= $(abspath ../esp-open-sdk/xtensa-lx106-elf/bin)/
+
+# Base directory of the ESP8266 SDK package, absolute
+# Typically you'll download from Espressif's BBS, http://bbs.espressif.com/viewforum.php?f=5
+SDK_BASE	?= $(abspath ../esp_iot_sdk_v1.1.0)
+
+# Esptool.py path and port, only used for 1-time serial flashing
+# Typically you'll use https://github.com/themadinventor/esptool
+ESPTOOL		?= $(abspath ../esptool/esptool.py)
+ESPPORT		?= /dev/ttyUSB0
+ESPBAUD		?= 460800
+
+# --------------- chipset configuration   ---------------
+
+ESP_SPI_SIZE        ?= 0      # 0->512KB
+ESP_FLASH_MODE      ?= 0      # 0->QIO
+ESP_FLASH_FREQ_DIV  ?= 0      # 0->40Mhz
+ESP_FLASH_MAX       ?= 241664 # max bin file for 512KB flash: 236KB
+
+# hostname or IP address for wifi flashing
+ESP_HOSTNAME        ?= esp8266
+
+# The pin assignments below are used when the settings in flash are invalid, they
+# can be changed via the web interface
+# GPIO pin used to reset attached microcontroller, acative low
+MCU_RESET_PIN       ?= 12
+# GPIO pin used with reset to reprogram MCU (ISP=in-system-programming, unused with AVRs), active low
+MCU_ISP_PIN         ?= 13
+# GPIO pin used for "connectivity" LED, active low
+LED_CONN_PIN        ?= 0
+# GPIO pin used for "serial activity" LED, active low
+LED_SERIAL_PIN      ?= 2
+
+# --------------- esp-link version        ---------------
+
+# This queries git to produce a version string like "esp-link v0.9.0 2015-06-01 34bc76"
+# If you don't have a proper git checkout or are on windows, then simply swap for the constant
+VERSION := "esp-link custom version"
+DATE    := $(shell date '+%F %T')
+BRANCH  := $(shell git rev-parse --abbrev-ref HEAD)
+SHA     := $(shell if git diff --quiet HEAD; then git symbolic-ref HEAD | cut -d"/" -f 3; \
+	else echo "development"; fi)
+VERSION := esp-link - $(BRANCH) - $(DATE) - $(SHA)
 
 # --------------- esphttpd config options ---------------
 
@@ -30,54 +90,33 @@ YUI-COMPRESSOR ?= /usr/bin/yui-compressor
 # Because the decompression is done in the esp8266, it does not require any support in the browser.
 USE_HEATSHRINK ?= yes
 
-# -------------- End of esphttpd config options -------------
+# -------------- End of config options -------------
-
 
 # Output directors to store intermediate compiled files
 # relative to the project directory
 BUILD_BASE	= build
 FW_BASE		= firmware
 
-# Base directory for the compiler. Needs a / at the end;
-XTENSA_TOOLS_ROOT ?= $(abspath ../esp-open-sdk/xtensa-lx106-elf/bin)/
-
-# Base directory of the ESP8266 SDK package, absolute
-SDK_BASE	?= $(abspath ../esp_iot_sdk_v1.1.0)
-
-#Esptool.py path and port
-ESPTOOL		?= esptool.py
-ESPPORT		?= /dev/ttyUSB0
-#ESPDELAY indicates seconds to wait between flashing the two binary images
-ESPDELAY	?= 3
-ESPBAUD		?= 460800
-
 # name for the target project
 TARGET		= httpd
 
 # espressif tool to concatenate sections for OTA upload using bootloader v1.2+
 APPGEN_TOOL	?= gen_appbin.py
-ESP_SPI_SIZE				?= 0  # 0->512KB
-ESP_FLASH_MODE 			?= 0  # 0->QIO
-ESP_FLASH_FREQ_DIV	?= 0  # 0->40Mhz
-ESP_FLASH_MAX				?= 241664 # max bin file for 512KB flash: 236KB
-ESP_HOSTNAME        ?= esp8266
-
-
 
 # which modules (subdirectories) of the project to include in compiling
-#MODULES		= driver user lwip/api lwip/app lwip/core lwip/core/ipv4 lwip/netif
 MODULES		= espfs httpd user serial
 EXTRA_INCDIR	= include . lib/heatshrink/
 
 # libraries used in this project, mainly provided by the SDK
 LIBS		= c gcc hal phy pp net80211 wpa main lwip
 
-
-
 # compiler flags using during compilation of source files
 CFLAGS		= -Os -ggdb -std=c99 -Werror -Wpointer-arith -Wundef -Wall -Wl,-EL -fno-inline-functions \
 		-nostdlib -mlongcalls -mtext-section-literals  -D__ets__ -DICACHE_FLASH -D_STDINT_H \
-		-Wno-address -DFIRMWARE_SIZE=$(ESP_FLASH_MAX)
+		-Wno-address -DFIRMWARE_SIZE=$(ESP_FLASH_MAX) \
+		-DMCU_RESET_PIN=$(MCU_RESET_PIN) -DMCU_ISP_PIN=$(MCU_ISP_PIN) \
+		-DLED_CONN_PIN=$(LED_CONN_PIN) -DLED_SERIAL_PIN=$(LED_SERIAL_PIN) \
+		"-DVERSION=$(VERSION)"
 
 # linker flags used to generate the main object file
 LDFLAGS		= -nostdlib -Wl,--no-check-sections -u call_user_start -Wl,-static
@@ -101,8 +140,6 @@ OBJCP := $(XTENSA_TOOLS_ROOT)xtensa-lx106-elf-objcopy
 OBJDP := $(XTENSA_TOOLS_ROOT)xtensa-lx106-elf-objdump
 
 
-####
-#### no user configurable options below here
 ####
 SRC_DIR		:= $(MODULES)
 BUILD_DIR	:= $(addprefix $(BUILD_BASE)/,$(MODULES))
@@ -152,7 +189,12 @@ endef
 
 .PHONY: all checkdirs clean webpages.espfs
 
-all: checkdirs $(FW_BASE) firmware/user1.bin firmware/user2.bin
+all: echo_version checkdirs $(FW_BASE) firmware/user1.bin firmware/user2.bin
+
+echo_version:
+	@echo VERSION: $(VERSION)
+
+user/version.h:
 
 $(TARGET_OUT): $(APP_AR) $(LD_SCRIPT)
 	$(vecho) "LD $@"
@@ -209,8 +251,10 @@ $(BUILD_DIR):
 wiflash: all
 	./wiflash $(ESP_HOSTNAME) firmware/user1.bin firmware/user2.bin
 
-flash: $(TARGET_OUT) $(FW_BASE)
+flash: all
-	$(Q) $(ESPTOOL) --port $(ESPPORT) --baud $(ESPBAUD) write_flash 0x00000 $(FW_BASE)/0x00000.bin 0x40000 $(FW_BASE)/0x40000.bin
+	$(Q) $(ESPTOOL) --port $(ESPPORT) --baud $(ESPBAUD) write_flash \
+	  0x00000 "$(SDK_BASE)/bin/boot_v1.4(b1).bin" 0x01000 $(FW_BASE)/user1.bin \
+	  0x7E000 $(SDK_BASE)/bin/blank.bin
 
 $(BUILD_BASE)/espfs_img.o: html/ html/wifi/ espfs/mkespfsimage/mkespfsimage
 ifeq ("$(COMPRESS_W_YUI)","yes")
@@ -245,12 +289,16 @@ build/eagle.esphttpd2.v6.ld: $(SDK_LDDIR)/eagle.app.v6.new.512.app2.ld
 			-e '/^  irom0_0_seg/ s/2B000/38000/' \
 	    $(SDK_LDDIR)/eagle.app.v6.new.512.app2.ld >$@
 
-blankflash:
-	$(Q) $(ESPTOOL) --port $(ESPPORT) --baud $(ESPBAUD) write_flash 0x7E000 $(SDK_BASE)/bin/blank.bin
-
 espfs/mkespfsimage/mkespfsimage: espfs/mkespfsimage/
 	$(Q) $(MAKE) -C espfs/mkespfsimage USE_HEATSHRINK="$(USE_HEATSHRINK)" GZIP_COMPRESSION="$(GZIP_COMPRESSION)"
 
+release: all
+	$(Q) rm -rf release; mkdir -p release/esp-link
+	$(Q) cp firmware/user1.bin firmware/user2.bin $(SDK_BASE)/bin/blank.bin \
+		   "$(SDK_BASE)/bin/boot_v1.4(b1).bin" wiflash release/esp-link
+	$(Q) tar zcf esp-link.tgz -C release esp-link
+	$(Q) rm -rf release
+
 clean:
 	$(Q) rm -f $(APP_AR)
 	$(Q) rm -f $(TARGET_OUT)

html/index.tpl

@@ -3,6 +3,7 @@
   <div id="main">
     <div class="header">
       <h1><span class="esp">esp</span> link</h1>
+		  <h2>%version%</h2>
     </div>
 
     <div class="content">

serial/serbridge.c

@@ -8,19 +8,10 @@
 
 #include "uart.h"
 #include "serbridge.h"
+#include "serled.h"
 #include "console.h"
 
-#if 1
+static uint8_t mcu_reset_pin, mcu_isp_pin;
-// GPIO for esp-03 module with gpio12->reset, gpio13->isp, gpio2->"ser" LED
-#define MCU_RESET 12
-#define MCU_ISP   13
-#define MCU_LED    2
-#else
-// GPIO for esp-01 module with gpio0->reset, gpio2->isp
-#define MCU_RESET  0
-#define MCU_ISP    2
-#undef MCU_LED
-#endif
 
 static struct espconn serbridgeConn;
 static esp_tcp serbridgeTcp;
@@ -88,6 +79,8 @@ static void ICACHE_FLASH_ATTR serbridgeSentCb(void *arg) {
 	//os_printf("%d ST\n", system_get_time());
 	conn->readytosend = true;
 	sendtxbuffer(conn); // send possible new data in txbuffer
+
+	serledFlash(50); // short blink on serial LED
 }
 
 // Telnet protocol characters
@@ -154,21 +147,21 @@ telnetUnwrap(uint8_t *inBuf, int len, uint8_t state)
 		case TN_setControl:             // switch control line and delay a tad
 			switch (c) {
 			case DTR_ON:
-				os_printf("MCU reset\n");
+				os_printf("MCU reset gpio%d\n", mcu_reset_pin);
-				GPIO_OUTPUT_SET(MCU_RESET, 0);
+				GPIO_OUTPUT_SET(mcu_reset_pin, 0);
 				os_delay_us(100L);
 				break;
 			case DTR_OFF:
-				GPIO_OUTPUT_SET(MCU_RESET, 1);
+				GPIO_OUTPUT_SET(mcu_reset_pin, 1);
 				os_delay_us(100L);
 				break;
 			case RTS_ON:
-				os_printf("MCU ISP\n");
+				os_printf("MCU ISP gpio%d\n", mcu_isp_pin);
-				GPIO_OUTPUT_SET(MCU_ISP, 0);
+				GPIO_OUTPUT_SET(mcu_isp_pin, 0);
 				os_delay_us(100L);
 				break;
 			case RTS_OFF:
-				GPIO_OUTPUT_SET(MCU_ISP, 1);
+				GPIO_OUTPUT_SET(mcu_isp_pin, 1);
 				os_delay_us(100L);
 				break;
 			}
@@ -198,16 +191,16 @@ static void ICACHE_FLASH_ATTR serbridgeRecvCb(void *arg, char *data, unsigned sh
 		if ((len == 2 && strncmp(data, "0 ", 2) == 0) ||
 				(len == 2 && strncmp(data, "?\n", 2) == 0) ||
 				(len == 3 && strncmp(data, "?\r\n", 3) == 0)) {
-			os_printf("MCU Reset=%d ISP=%d\n", MCU_RESET, MCU_ISP);
+			os_printf("MCU Reset=%d ISP=%d\n", mcu_reset_pin, mcu_isp_pin);
 			os_delay_us(2*1000L); // time for os_printf to happen
 			// send reset to arduino/ARM
-			GPIO_OUTPUT_SET(MCU_RESET, 0);
+			GPIO_OUTPUT_SET(mcu_reset_pin, 0);
 			os_delay_us(100L);
-			GPIO_OUTPUT_SET(MCU_ISP, 0);
+			GPIO_OUTPUT_SET(mcu_isp_pin, 0);
 			os_delay_us(100L);
-			GPIO_OUTPUT_SET(MCU_RESET, 1);
+			GPIO_OUTPUT_SET(mcu_reset_pin, 1);
 			os_delay_us(100L);
-			GPIO_OUTPUT_SET(MCU_ISP, 1);
+			GPIO_OUTPUT_SET(mcu_isp_pin, 1);
 			os_delay_us(1000L);
 			conn->conn_mode = cmAVR;
 
@@ -231,6 +224,8 @@ static void ICACHE_FLASH_ATTR serbridgeRecvCb(void *arg, char *data, unsigned sh
 	} else {
 		uart0_tx_buffer(data, len);
 	}
+
+	serledFlash(50); // short blink on serial LED
 }
 
 // Error callback (it's really poorly named, it's not a "connection reconnected" callback,
@@ -253,9 +248,9 @@ static void ICACHE_FLASH_ATTR serbridgeDisconCb(void *arg) {
 		{
 			if (connData[i].conn_mode == cmAVR) {
 				// send reset to arduino/ARM
-				GPIO_OUTPUT_SET(MCU_RESET, 0);
+				GPIO_OUTPUT_SET(mcu_reset_pin, 0);
 				os_delay_us(100L);
-				GPIO_OUTPUT_SET(MCU_RESET, 1);
+				GPIO_OUTPUT_SET(mcu_reset_pin, 1);
 			}
 			connData[i].conn = NULL;
 		}
@@ -303,7 +298,7 @@ serbridgeUartCb(char *buf, int length) {
 }
 
 // Start transparent serial bridge TCP server on specified port (typ. 23)
-void ICACHE_FLASH_ATTR serbridgeInit(int port) {
+void ICACHE_FLASH_ATTR serbridgeInit(int port, uint8_t reset_pin, uint8_t isp_pin) {
 	int i;
 	for (i = 0; i < MAX_CONN; i++) {
 		connData[i].conn = NULL;
@@ -314,13 +309,14 @@ void ICACHE_FLASH_ATTR serbridgeInit(int port) {
 	serbridgeTcp.local_port = port;
 	serbridgeConn.proto.tcp = &serbridgeTcp;
 
-	PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12);
+	mcu_reset_pin = reset_pin;
-	PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U , FUNC_GPIO13);
+	mcu_isp_pin = isp_pin;
-	//GPIO_OUTPUT_SET(MCU_ISP, 1);
+	// set both pins to 1 so we don't cause a reset
-	//GPIO_OUTPUT_SET(MCU_RESET, 0);
+	GPIO_OUTPUT_SET(mcu_isp_pin, 1);
-#ifdef MCU_LED
+	GPIO_OUTPUT_SET(mcu_reset_pin, 1);
-	GPIO_OUTPUT_SET(MCU_LED, 1);
+	// switch pin mux to make these pins GPIO pins
-#endif
+	makeGpio(mcu_reset_pin);
+	makeGpio(mcu_isp_pin);
 
 	espconn_regist_connectcb(&serbridgeConn, serbridgeConnectCb);
 	espconn_accept(&serbridgeConn);

serial/serbridge.h

@@ -32,7 +32,7 @@ struct serbridgeConnData {
   uint8_t        telnet_state;
 };
 
-void ICACHE_FLASH_ATTR serbridgeInit(int port);
+void ICACHE_FLASH_ATTR serbridgeInit(int port, uint8_t reset_pin, uint8_t isp_pin);
 void ICACHE_FLASH_ATTR serbridgeUartCb(char *buf, int len);
 
 #endif /* __SER_BRIDGE_H__ */

serial/serled.c

@@ -0,0 +1,79 @@
+#include <esp8266.h>
+#include <serled.h>
+
+static ETSTimer serledTimer;
+static uint8_t serledPin;
+
+static void ICACHE_FLASH_ATTR setSerled(int on) {
+  // LED is active-low
+  if (on) {
+    gpio_output_set(0, (1<<serledPin), (1<<serledPin), 0);
+  } else {
+    gpio_output_set((1<<serledPin), 0, (1<<serledPin), 0);
+  }
+}
+
+static void ICACHE_FLASH_ATTR serledTimerCb(void *v) {
+  setSerled(0);
+}
+
+void ICACHE_FLASH_ATTR serledFlash(int duration) {
+  setSerled(1);
+  os_timer_disarm(&serledTimer);
+  os_timer_setfn(&serledTimer, serledTimerCb, NULL);
+  os_timer_arm(&serledTimer, duration, 0);
+}
+
+void ICACHE_FLASH_ATTR serledInit(uint8_t pin) {
+  serledPin = pin;
+  makeGpio(pin);
+  gpio_output_set(0, 0, (1<<pin), 0);
+  serledFlash(1000); // turn it on for 1 second
+}
+
+// Make a pin be GPIO, i.e. set the mux so the pin has the gpio function
+void ICACHE_FLASH_ATTR makeGpio(uint8_t pin) {
+  uint32_t addr;
+  uint8_t func = 3;
+  switch (pin) {
+  case 0:
+    addr = PERIPHS_IO_MUX_GPIO0_U;
+    func = 0;
+    break;
+  case 1:
+    addr = PERIPHS_IO_MUX_U0TXD_U;
+    break;
+  case 2:
+    addr = PERIPHS_IO_MUX_GPIO2_U;
+    func = 0;
+    break;
+  case 3:
+    addr = PERIPHS_IO_MUX_U0RXD_U;
+    break;
+  case 4:
+    addr = PERIPHS_IO_MUX_GPIO4_U;
+    func = 0;
+    break;
+  case 5:
+    addr = PERIPHS_IO_MUX_GPIO5_U;
+    func = 0;
+    break;
+  case 6:
+  case 7:
+  case 8:
+  case 9:
+  case 10:
+  case 11:
+    addr = PERIPHS_IO_MUX_SD_CMD_U - 4 * (11-pin);
+    break;
+  case 12:
+  case 13:
+  case 14:
+  case 15:
+    addr = PERIPHS_IO_MUX_MTDO_U - 4 * (15-pin);
+    break;
+  default:
+    return;
+  }
+  PIN_FUNC_SELECT(addr, func);
+}

serial/serled.h

@@ -0,0 +1,9 @@
+#ifndef SERLED_H
+#define SERLED_H
+
+void serledFlash(int duration);
+void serledInit(uint8_t pin);
+void makeGpio(uint8_t pin);
+
+#endif
+

serial/uart.c

@@ -167,6 +167,8 @@ uart0_sendStr(const char *str)
 	}
 }
 
+static bool rx_bad; // set to true on framing error to avoid printing errors continuously
+
 /******************************************************************************
  * FunctionName : uart0_rx_intr_handler
  * Description  : Internal used function
@@ -183,23 +185,25 @@ uart0_rx_intr_handler(void *para)
 
   if(UART_FRM_ERR_INT_ST == (READ_PERI_REG(UART_INT_ST(uart_no)) & UART_FRM_ERR_INT_ST))
   {
-    os_printf("FRM_ERR\r\n");
+    if (!rx_bad) os_printf("FRM_ERR\n");
+    rx_bad = true;
     //clear rx and tx fifo
     SET_PERI_REG_MASK(UART_CONF0(uart_no), UART_RXFIFO_RST);
     CLEAR_PERI_REG_MASK(UART_CONF0(uart_no), UART_RXFIFO_RST);
-		// reset interrupt
+    // reset interrupt
     WRITE_PERI_REG(UART_INT_CLR(uart_no), UART_FRM_ERR_INT_CLR);
   }
 
   if(UART_RXFIFO_FULL_INT_ST == (READ_PERI_REG(UART_INT_ST(uart_no)) & UART_RXFIFO_FULL_INT_ST))
   {
-    //os_printf("fifo full\r\n");
+    //os_printf("fifo fullr\n");
     ETS_UART_INTR_DISABLE();
 
     system_os_post(recvTaskPrio, 0, 0);
   }
   else if(UART_RXFIFO_TOUT_INT_ST == (READ_PERI_REG(UART_INT_ST(uart_no)) & UART_RXFIFO_TOUT_INT_ST))
   {
+    rx_bad = false;
     ETS_UART_INTR_DISABLE();
     //os_printf("stat:%02X",*(uint8 *)UART_INT_ENA(uart_no));
     system_os_post(recvTaskPrio, 0, 0);

user/cgi.c

@@ -74,6 +74,10 @@ int ICACHE_FLASH_ATTR tplCounter(HttpdConnData *connData, char *token, void **ar
 	} else if (os_strcmp(token, "head")==0) {
 		printHead(connData);
 		buff[0] = 0;
+	} else if (os_strcmp(token, "version")==0) {
+#   define VERS_STR_STR(V) #V
+#   define VERS_STR(V) VERS_STR_STR(V)
+		os_sprintf(buff, "%s", VERS_STR(VERSION));
 	} else if (os_strcmp(token, "counter")==0) {
 		hitCounter++;
 		os_sprintf(buff, "%ld", hitCounter);

user/cgiflash.c

@@ -27,6 +27,7 @@ static char* ICACHE_FLASH_ATTR check_header(void *buf) {
 	return NULL;
 }
 
+#if 0
 //===== Cgi that reads the SPI flash. Assumes 512KByte flash.
 int ICACHE_FLASH_ATTR cgiReadFlash(HttpdConnData *connData) {
 	int *pos=(int *)&connData->cgiData;
@@ -48,6 +49,7 @@ int ICACHE_FLASH_ATTR cgiReadFlash(HttpdConnData *connData) {
 	*pos+=1024;
 	if (*pos>=0x40200000+(512*1024)) return HTTPD_CGI_DONE; else return HTTPD_CGI_MORE;
 }
+#endif
 
 //===== Cgi to query which firmware needs to be uploaded next
 int ICACHE_FLASH_ATTR cgiGetFirmwareNext(HttpdConnData *connData) {

user/console.c

@@ -6,20 +6,27 @@
 // Microcontroller console capturing the last 1024 characters received on the uart so
 // they can be shown on a web page
 
+// Buffer to hold concole contents.
+// Invariants:
+// - console_rd==console_wr <=> buffer empty
+// - *console_rd == next char to read
+// - *console_wr == next char to write
+// - 0 <= console_xx < BUF_MAX
+// - (console_wr+1)%BUF_MAX) == console_rd <=> buffer full
 #define BUF_MAX (1024)
 static char console_buf[BUF_MAX];
 static int console_wr, console_rd;
-static int console_pos; // offset since reset of console_rd position
+static int console_pos; // offset since reset of buffer
 
 static void ICACHE_FLASH_ATTR
 console_write(char c) {
-	int wr = (console_wr+1)%BUF_MAX;
+	console_buf[console_wr] = c;
-	if (wr == console_rd) {
+	console_wr = (console_wr+1) % BUF_MAX;
+	if (console_wr == console_rd) {
+		// full, we write anyway and loose the oldest char
 		console_rd = (console_rd+1) % BUF_MAX; // full, eat first char
 		console_pos++;
 	}
-	console_buf[console_wr] = c;
-	console_wr = wr;
 }
 
 // return previous character in console, 0 if at start
@@ -41,11 +48,13 @@ tplConsole(HttpdConnData *connData, char *token, void **arg) {
 	if (token==NULL) return HTTPD_CGI_DONE;
 
 	if (os_strcmp(token, "console") == 0) {
-		if (console_wr < console_rd) {
+		if (console_wr > console_rd) {
 			httpdSend(connData, console_buf+console_rd, console_wr-console_rd);
 		} else if (console_rd != console_wr) {
 			httpdSend(connData, console_buf+console_rd, BUF_MAX-console_rd);
 			httpdSend(connData, console_buf, console_wr);
+		} else {
+			httpdSend(connData, "<buffer empty>", -1);
 		}
 	} else if (os_strcmp(token, "head")==0) {
 		printHead(connData);

user/log.c

@@ -7,6 +7,7 @@
 // The web log has a 1KB circular in-memory buffer which os_printf prints into and
 // the HTTP handler simply displays the buffer content on a web page.
 
+// see consolse.c for invariants (same here)
 #define BUF_MAX (1024)
 static char log_buf[BUF_MAX];
 static int log_wr, log_rd;
@@ -27,11 +28,10 @@ log_uart(bool enable) {
 
 static void ICACHE_FLASH_ATTR
 log_write(char c) {
-	int wr = (log_wr+1)%BUF_MAX;
-	if (wr == log_rd)
-		log_rd = (log_rd+1) % BUF_MAX; // full, eat first char
 	log_buf[log_wr] = c;
-	log_wr = wr;
+	log_wr = (log_wr+1) % BUF_MAX;
+	if (log_wr == log_rd)
+		log_rd = (log_rd+1) % BUF_MAX; // full, eat first char
 }
 
 #if 0
@@ -74,6 +74,8 @@ tplLog(HttpdConnData *connData, char *token, void **arg) {
 		} else if (log_rd != log_wr) {
 			httpdSend(connData, log_buf+log_rd, BUF_MAX-log_rd);
 			httpdSend(connData, log_buf, log_wr);
+		} else {
+			httpdSend(connData, "<buffer empty>", -1);
 		}
 	} else if (os_strcmp(token, "head")==0) {
 		printHead(connData);

user/status.h

@@ -2,7 +2,7 @@
 #define STATUS_H
 
 void statusWifiUpdate(uint8_t state);
-void statusInit(void);
+void statusInit(uint8_t pin);
 
 #endif
 

user/user_main.c

@@ -21,6 +21,7 @@
 #include "uart.h"
 #include "serbridge.h"
 #include "status.h"
+#include "serled.h"
 #include "console.h"
 #include "log.h"
 #define MCU_RESET 12
@@ -59,7 +60,7 @@ should be placed above the URLs they protect.
 */
 HttpdBuiltInUrl builtInUrls[]={
 	{"/", cgiRedirect, "/index.tpl"},
-	{"/flash/read", cgiReadFlash, NULL},
+	//{"/flash/read", cgiReadFlash, NULL},
 	{"/flash/next", cgiGetFirmwareNext, NULL},
 	{"/flash/upload", cgiUploadFirmware, NULL},
 	{"/flash/reboot", cgiRebootFirmware, NULL},
@@ -110,9 +111,12 @@ void user_init(void) {
 	uart_init(BIT_RATE_115200, BIT_RATE_115200);
 	// say hello (leave some time to cause break in TX after boot loader's msg
 	os_delay_us(10000L);
-	os_printf("\n\nInitializing esp-link\n");
+# define VERS_STR_STR(V) #V
+# define VERS_STR(V) VERS_STR_STR(V)
+	os_printf("\n\nInitializing esp-link\n" VERS_STR(VERSION) "\n");
 	// Status LEDs
-	statusInit();
+	statusInit(LED_CONN_PIN);
+	serledInit(LED_SERIAL_PIN);
 	// Wifi
 	wifiInit();
 	// init the flash filesystem with the html stuff
@@ -121,7 +125,7 @@ void user_init(void) {
 	// mount the http handlers
 	httpdInit(builtInUrls, 80);
 	// init the wifi-serial transparent bridge (port 23)
-	serbridgeInit(23);
+	serbridgeInit(23, MCU_RESET_PIN, MCU_ISP_PIN);
 	uart_add_recv_cb(&serbridgeUartCb);
 #ifdef SHOW_HEAP_USE
 	os_timer_disarm(&prHeapTimer);

wiflash

@@ -82,7 +82,7 @@ while true; do
 	next=`curl -m 10 $v -s "http://$hostname/flash/next"`
 	if [[ $? != 0 ]]; then
 		echo "Error retrieving http://$hostname/flash/next" >&2
-		break
+		exit 1
 	fi
 	case "$next" in
 	user1.bin)
@@ -94,8 +94,8 @@ while true; do
 		fw="$user2"
 		break;;
 	*)
-	  echo "Cannot parse result of retrieving http://$hostname/flash/next" >&2
+	  echo "Error retrieving or parsing http://$hostname/flash/next" >&2
-		sleep 2
+		exit 1
 		;;
 	esac
 done