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Removed buffer allocation for telnet escaping of IAC bytes. Baudrate setting is now correctly reported on the web page.

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pull/140/head
Christophe Duparquet 9 years ago
parent 076391bb62
commit b61eb276e2
1 changed files with 94 additions and 127 deletions
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  1. 221
      serial/serbridge.c

221
serial/serbridge.c
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@ -3,28 +3,30 @@
/* Modified by Christophe Duparquet: extended implementation of RFC 2217 /* Modified by Christophe Duparquet: extended implementation of RFC 2217
* *
* Verified on ESP-WROOM-02 with the following configuration: * Verified on ESP-WROOM-02 with the following configuration:
* Reset: gpio5 * Reset: gpio5
* ISP/Flash: disabled * ISP/Flash: disabled
* Conn LED: gpio4 * Conn LED: gpio4
* Serial LED: disabled * Serial LED: disabled
* UART pins: swapped * UART pins: swapped
* RX pull-up: yes * RX pull-up: yes
* *
* ESP connections: * ESP connections:
* GPIO2 (#7) / 3V3 (#1) -> 1kR * GPIO2 (#7) / 3V3 (#1) -> 1kR
* GPIO0 (#8) / 3V3 (#1) -> 1kR * GPIO0 (#8) / 3V3 (#1) -> 1kR
* GPIO0 (#8) = USB serial RTS * GPIO0 (#8) = USB serial RTS
* GPIO13 (#5) / GPIO15 (#6) -> 1kR * GPIO13 (#5) / GPIO15 (#6) -> 1kR
* GPIO15 (#6) / GND (#9) -> 10kR * GPIO15 (#6) / GND (#9) -> 10kR
* EN (#2) / 3V3 (#1) -> 10 kR * EN (#2) / 3V3 (#1) -> 10 kR
* #18 = #13 = #1 = GND * #18 = #13 = #1 = GND
* RST (#15) -> USB serial RTS * RST (#15) -> USB serial RTS
* *
* ATtiny85 (3V3) connections: * ATtiny85 (3V3) connections:
* RESET (#1) -> ESP pin GPIO5 (#14) * RESET (#1) -> ESP pin GPIO5 (#14)
* RXTX (#2) -> ESP pin GPIO13 (#5) * RXTX (#2) -> ESP pin GPIO13 (#5)
* *
* Command: diabolo -t rfc2217://192.168.1.78:23 * Commands (using pyserial-3.0):
* python -m serial.tools.miniterm rfc2217://192.168.1.78:23
* diabolo -t rfc2217://192.168.1.78:23 --keep-txd-low 0.1 --read-flash
*/ */
#include "esp8266.h" #include "esp8266.h"
@ -41,28 +43,34 @@
#define SKIP_AT_RESET #define SKIP_AT_RESET
/* ESP8266 /* ESP8266 hardware registers
*/ */
#define IROM ICACHE_FLASH_ATTR
#define REG_BRR (*(volatile uint32_t*)0x60000014) #define REG_BRR (*(volatile uint32_t*)0x60000014)
#define REG_CONF0 (*(volatile uint32_t*)0x60000020) #define REG_CONF0 (*(volatile uint32_t*)0x60000020)
#define REG_CONF1 (*(volatile uint32_t*)0x60000024) #define REG_CONF1 (*(volatile uint32_t*)0x60000024)
#ifdef SERBR_DBG
# define DBG(...) do { os_printf(__VA_ARGS__); }while(0)
#else
# define DBG(...) do{}while(0)
#endif
static struct espconn serbridgeConn1; // plain bridging port static struct espconn serbridgeConn1; // plain bridging port
static struct espconn serbridgeConn2; // programming port static struct espconn serbridgeConn2; // programming port
static esp_tcp serbridgeTcp1, serbridgeTcp2; static esp_tcp serbridgeTcp1, serbridgeTcp2;
static int8_t mcu_reset_pin, mcu_isp_pin; static int8_t mcu_reset_pin, mcu_isp_pin;
extern uint8_t slip_disabled; // disable slip to allow flashing of attached MCU extern uint8_t slip_disabled; // disable slip to allow flashing of attached MCU
void (*programmingCB)(char *buffer, short length) = NULL; void (*programmingCB)(char *buffer, short length) = NULL;
// Connection pool // Connection pool
serbridgeConnData connData[MAX_CONN]; serbridgeConnData connData[MAX_CONN];
static sint8 IROM espbuffsend(serbridgeConnData *conn, const char *data, uint16 len) ; static sint8 ICACHE_FLASH_ATTR espbuffsend(serbridgeConnData *conn, const char *data, uint16 len) ;
static sint8 IROM espbuffsend_tn(serbridgeConnData *conn, const char *data, uint16 len) ; static sint8 ICACHE_FLASH_ATTR espbuffsend_tn(serbridgeConnData *conn, const char *data, uint16 len) ;
// Telnet protocol (RFC854) characters // Telnet protocol (RFC854) characters
@ -88,13 +96,6 @@ static sint8 IROM espbuffsend_tn(serbridgeConnData *conn, const char *data, uint
#define PURGE_DATA 12 // suboption "PURGE" #define PURGE_DATA 12 // suboption "PURGE"
#ifdef SERBR_DBG
# define dbgf(...) do { os_printf(__VA_ARGS__); }while(0)
#else
# define dbgf(...) do{}while(0)
#endif
/* Telnet state machine states /* Telnet state machine states
*/ */
enum { enum {
@ -115,7 +116,8 @@ enum {
/* Telnet state machine: process one byte comming from a telnet connection /* Telnet state machine: process one byte comming from a telnet connection
*/ */
static void IROM telnet_process_char ( serbridgeConnData *conn, char c ) static void ICACHE_FLASH_ATTR
telnet_process_char ( serbridgeConnData *conn, char c )
{ {
#define state conn->tn_state #define state conn->tn_state
#define opt conn->tn_opt #define opt conn->tn_opt
@ -167,7 +169,7 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
} }
if ( state == ST_NEGO ) { if ( state == ST_NEGO ) {
dbgf("TELNET: IAC NEGO (%02X)", c); DBG("TELNET: IAC NEGO (%02X)", c);
if ( c == BINARY || if ( c == BINARY ||
c == ECHO || c == ECHO ||
c == SUPPRESS_GO_AHEAD || c == SUPPRESS_GO_AHEAD ||
@ -175,7 +177,7 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
/* /*
* Acknowledge positive requests for known options * Acknowledge positive requests for known options
*/ */
dbgf(": OK\n"); DBG(": OK\n");
if ( opt == DO ) if ( opt == DO )
opt = WILL ; opt = WILL ;
else if ( opt == WILL ) else if ( opt == WILL )
@ -185,14 +187,14 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
/* /*
* Deny positive requests for unknown options * Deny positive requests for unknown options
*/ */
dbgf(": REJECTED\n"); DBG(": REJECTED\n");
if ( opt == DO ) if ( opt == DO )
opt = WONT ; opt = WONT ;
else if ( opt == WILL ) else if ( opt == WILL )
opt = DONT ; opt = DONT ;
} }
/* /*
* Send reply * Send reply
*/ */
espbuffsend( conn, (char[]){IAC,opt,c}, 3 ); espbuffsend( conn, (char[]){IAC,opt,c}, 3 );
state = ST_NORMAL ; state = ST_NORMAL ;
@ -215,26 +217,26 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
if ( state == ST_COMPORT ) { if ( state == ST_COMPORT ) {
if ( c == SET_BAUDRATE ) { if ( c == SET_BAUDRATE ) {
dbgf(" BAUDRATE:"); DBG(" BAUDRATE:");
vlen = 0 ; vlen = 0 ;
state = ST_BAUDRATE ; state = ST_BAUDRATE ;
} else if ( c == SET_DATASIZE ) { } else if ( c == SET_DATASIZE ) {
dbgf(" DATASIZE:"); DBG(" DATASIZE:");
state = ST_DATASIZE ; state = ST_DATASIZE ;
} else if ( c == SET_PARITY ) { } else if ( c == SET_PARITY ) {
dbgf(" PARITY:"); DBG(" PARITY:");
state = ST_PARITY ; state = ST_PARITY ;
} else if ( c == SET_STOPSIZE ) { } else if ( c == SET_STOPSIZE ) {
dbgf(" STOPSIZE:"); DBG(" STOPSIZE:");
state = ST_STOPSIZE ; state = ST_STOPSIZE ;
} else if ( c == SET_CONTROL ) { } else if ( c == SET_CONTROL ) {
dbgf(" CONTROL:"); DBG(" CONTROL:");
state = ST_CONTROL ; state = ST_CONTROL ;
} else if ( c == PURGE_DATA ) { } else if ( c == PURGE_DATA ) {
dbgf(" PURGE:"); DBG(" PURGE:");
state = ST_PURGE ; state = ST_PURGE ;
} else { } else {
dbgf("UNKNOWN: %02X\n", c); DBG("UNKNOWN: %02X\n", c);
state = ST_WAIT_IAC ; state = ST_WAIT_IAC ;
} }
return ; return ;
@ -242,9 +244,9 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
if ( state == ST_BAUDRATE ) { if ( state == ST_BAUDRATE ) {
/* /*
* Get 4 bytes of baudrate (MSB first) * Get 4 bytes of baudrate (MSB first)
*/ */
dbgf(" %02X", c); DBG(" %02X", c);
value <<= 8 ; value <<= 8 ;
value += c ; value += c ;
@ -258,18 +260,22 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
*/ */
if ( value == 0 ) if ( value == 0 )
/* /*
* Get actual baudrate * Get baudrate
*/ */
value = (int)(0.5 + 80e6/REG_BRR); //value = (int)(0.5 + 80e6/REG_BRR);
value = flashConfig.baud_rate ;
else else
/* /*
* Set baudrate * Set baudrate
*/ */
REG_BRR = (int)(0.5 + 80e6/value); //REG_BRR = (int)(0.5 + 80e6/value);
//UART_SetBaudrate(0,value); /* Not supported? */
flashConfig.baud_rate = value ;
uart0_baud( value );
/* Acknowledge /* Acknowledge
*/ */
dbgf(" = %ld\n", value); DBG(" = %ld\n", value);
char v0 = value ; char v0 = value ;
char v1 = value >> 8 ; char v1 = value >> 8 ;
char v2 = value >> 16 ; char v2 = value >> 16 ;
@ -286,8 +292,7 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
if ( state == ST_DATASIZE ) { if ( state == ST_DATASIZE ) {
if ( c >= 5 && c <= 8 ) { if ( c >= 5 && c <= 8 ) {
/* /*
* Set data size * Set data size: CONF0 bits 3..2
* Store databits in bits 3..2 of register conf0
*/ */
REG_CONF0 = (REG_CONF0 & ~0xC) | ((c-5)<<2) ; REG_CONF0 = (REG_CONF0 & ~0xC) | ((c-5)<<2) ;
} }
@ -298,9 +303,9 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
c = 5 + ((REG_CONF0>>2) & 0x03) ; c = 5 + ((REG_CONF0>>2) & 0x03) ;
} }
/* Acknowledge datasize /* Acknowledge datasize
*/ */
dbgf(" %d\n", c ); DBG(" %d\n", c );
espbuffsend( conn, (char[]){IAC,SB,COM_PORT_OPTION,100+SET_DATASIZE,c,IAC,SE},7 ); espbuffsend( conn, (char[]){IAC,SB,COM_PORT_OPTION,100+SET_DATASIZE,c,IAC,SE},7 );
state = ST_WAIT_IAC ; state = ST_WAIT_IAC ;
return ; return ;
@ -343,9 +348,9 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
return ; return ;
} }
/* Acknowledge parity /* Acknowledge parity
*/ */
dbgf(" %d\n", c ); DBG(" %d\n", c );
espbuffsend( conn, (char[]){IAC,SB,COM_PORT_OPTION,100+SET_PARITY,c,IAC,SE},7 ); espbuffsend( conn, (char[]){IAC,SB,COM_PORT_OPTION,100+SET_PARITY,c,IAC,SE},7 );
state = ST_WAIT_IAC ; state = ST_WAIT_IAC ;
return ; return ;
@ -384,9 +389,9 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
return ; return ;
} }
/* Acknowledge stop bits /* Acknowledge stop bits
*/ */
dbgf(" %d\n", c ); DBG(" %d\n", c );
espbuffsend( conn, (char[]){IAC,SB,COM_PORT_OPTION,100+SET_STOPSIZE,c,IAC,SE},7 ); espbuffsend( conn, (char[]){IAC,SB,COM_PORT_OPTION,100+SET_STOPSIZE,c,IAC,SE},7 );
state = ST_WAIT_IAC ; state = ST_WAIT_IAC ;
return ; return ;
@ -418,84 +423,68 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
else if ( c == 8 ) { else if ( c == 8 ) {
#ifdef USE_UART_CONTROL_LINES #ifdef USE_UART_CONTROL_LINES
/* /*
* Set DTR Signal State ON * Set DTR Signal State ON: CONF0 bit 7 = 1
*
* Assert DTR: CONF0 bit 7
*/ */
REG_CONF0 |= (1ULL<<7) ; REG_CONF0 |= (1ULL<<7) ;
#else #else
/* /*
* Set DTR Signal State ON * Set DTR Signal State ON: drive MCU reset LOW
*
* Drive MCU reset LOW
*/ */
if (mcu_reset_pin >= 0) { if (mcu_reset_pin >= 0) {
dbgf("MCU reset gpio%d\n", mcu_reset_pin); DBG("MCU reset gpio%d\n", mcu_reset_pin);
GPIO_OUTPUT_SET(mcu_reset_pin, 0); GPIO_OUTPUT_SET(mcu_reset_pin, 0);
} }
else else
dbgf("MCU reset: no pin\n"); DBG("MCU reset: no pin\n");
#endif #endif
} }
else if ( c == 9 ) { else if ( c == 9 ) {
#ifdef USE_UART_CONTROL_LINES #ifdef USE_UART_CONTROL_LINES
/* /*
* Set DTR Signal State OFF * Set DTR Signal State OFF: CONF0 bit 7 = 0
*
* Assert DTR: CONF0 bit 7
*/ */
REG_CONF0 &= ~(1ULL<<7) ; REG_CONF0 &= ~(1ULL<<7) ;
#else #else
/* /*
* Set DTR Signal State OFF * Set DTR Signal State OFF: drive MCU reset HIGH
*
* Drive MCU reset HIGH
*/ */
if (mcu_reset_pin >= 0) { if (mcu_reset_pin >= 0) {
dbgf("MCU reset gpio%d\n", mcu_reset_pin); DBG("MCU reset gpio%d\n", mcu_reset_pin);
GPIO_OUTPUT_SET(mcu_reset_pin, 1); GPIO_OUTPUT_SET(mcu_reset_pin, 1);
} }
else else
dbgf("MCU reset: no pin\n"); DBG("MCU reset: no pin\n");
#endif #endif
} }
else if ( c == 11 ) { else if ( c == 11 ) {
#ifdef USE_UART_CONTROL_LINES #ifdef USE_UART_CONTROL_LINES
/* /*
* Set RTS Signal State ON * Set RTS Signal State ON: CONF0 bit 6 = 1
*
* Assert RTS: CONF0 bit 6 = 1
*/ */
REG_CONF0 |= (1ULL<<6) ; REG_CONF0 |= (1ULL<<6) ;
#else #else
/* /*
* Set RTS Signal State ON * Set RTS Signal State ON: drive MCU ISP pin LOW
*
* Drive MCU ISP pin LOW
*/ */
if (mcu_isp_pin >= 0) { if (mcu_isp_pin >= 0) {
dbgf("MCU ISP gpio%d\n", mcu_isp_pin); DBG("MCU ISP gpio%d\n", mcu_isp_pin);
GPIO_OUTPUT_SET(mcu_isp_pin, 0); GPIO_OUTPUT_SET(mcu_isp_pin, 0);
os_delay_us(100L); os_delay_us(100L);
} }
else else
dbgf("MCU isp: no pin\n"); DBG("MCU isp: no pin\n");
slip_disabled++; slip_disabled++;
#endif #endif
} }
else if ( c == 12 ) { else if ( c == 12 ) {
#ifdef USE_UART_CONTROL_LINES #ifdef USE_UART_CONTROL_LINES
/* /*
* Set RTS Signal State OFF * Set RTS Signal State OFF: CONF0 bit 6 = 0
*
* Assert RTS: CONF0 bit 6 = 0
*/ */
REG_CONF0 &= ~(1ULL<<6) ; REG_CONF0 &= ~(1ULL<<6) ;
#else #else
/* /*
* Set RTS Signal State OFF * Set RTS Signal State OFF: drive MCU ISP pin HIGH
*
* Drive MCU ISP pin HIGH
*/ */
if (mcu_isp_pin >= 0) { if (mcu_isp_pin >= 0) {
GPIO_OUTPUT_SET(mcu_isp_pin, 1); GPIO_OUTPUT_SET(mcu_isp_pin, 1);
@ -512,9 +501,9 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
return ; return ;
} }
/* Acknowledge control /* Acknowledge control
*/ */
dbgf(" %d\n", c ); DBG(" %d\n", c );
espbuffsend( conn, (char[]){IAC,SB,COM_PORT_OPTION,100+SET_CONTROL,c,IAC,SE},7 ); espbuffsend( conn, (char[]){IAC,SB,COM_PORT_OPTION,100+SET_CONTROL,c,IAC,SE},7 );
state = ST_WAIT_IAC ; state = ST_WAIT_IAC ;
return ; return ;
@ -542,17 +531,15 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
return ; return ;
} }
/* Acknowledge purge /* Acknowledge purge
*/ */
dbgf(" %d\n", c ); DBG(" %d\n", c );
espbuffsend( conn, (char[]){IAC,SB,COM_PORT_OPTION,100+PURGE_DATA,c,IAC,SE},7 ); espbuffsend( conn, (char[]){IAC,SB,COM_PORT_OPTION,100+PURGE_DATA,c,IAC,SE},7 );
state = ST_WAIT_IAC ; state = ST_WAIT_IAC ;
return ; return ;
} }
/* Unexpected char /* Unknown state */
*/
state = ST_WAIT_IAC ;
#undef state #undef state
#undef opt #undef opt
@ -563,7 +550,8 @@ static void IROM telnet_process_char ( serbridgeConnData *conn, char c )
/* Process bytes comming from a telnet connection /* Process bytes comming from a telnet connection
*/ */
static void IROM telnet_process_buf ( serbridgeConnData *conn, uint8_t *buf, int len ) static void ICACHE_FLASH_ATTR
telnet_process_buf ( serbridgeConnData *conn, uint8_t *buf, int len )
{ {
#ifdef SERBR_DBG #ifdef SERBR_DBG
os_printf("TELNET:"); os_printf("TELNET:");
@ -615,14 +603,14 @@ serbridgeRecvCb(void *arg, char *data, unsigned short len)
// If the connection starts with the Arduino or ARM reset sequence we perform a RESET // If the connection starts with the Arduino or ARM reset sequence we perform a RESET
if ((len == 2 && strncmp(data, "0 ", 2) == 0) || if ((len == 2 && strncmp(data, "0 ", 2) == 0) ||
(len == 2 && strncmp(data, "?\n", 2) == 0) || (len == 2 && strncmp(data, "?\n", 2) == 0) ||
(len == 3 && strncmp(data, "?\r\n", 3) == 0)) { (len == 3 && strncmp(data, "?\r\n", 3) == 0)) {
startPGM = true; startPGM = true;
conn->conn_mode = cmPGM; conn->conn_mode = cmPGM;
// If the connection starts with a telnet negotiation we will do telnet // If the connection starts with a telnet negotiation we will do telnet
} }
// else if (len >= 3 && strncmp(data, (char[]){IAC, WILL, COM_PORT_OPTION}, 3) == 0) { // else if (len >= 3 && strncmp(data, (char[]){IAC, WILL, COM_PORT_OPTION}, 3) == 0) {
else if ( len>2 && data[0]==IAC && (data[1]==WILL || data[1]==DO) ) { else if ( len>2 && data[0]==IAC && (data[1]==WILL || data[1]==DO) ) {
conn->conn_mode = cmTelnet; conn->conn_mode = cmTelnet;
conn->tn_state = ST_NORMAL; conn->tn_state = ST_NORMAL;
@ -669,7 +657,7 @@ serbridgeRecvCb(void *arg, char *data, unsigned short len)
if ( conn->conn_mode == cmTelnet ) { if ( conn->conn_mode == cmTelnet ) {
/* /*
* Process Telnet protocol * Process Telnet protocol
*/ */
telnet_process_buf( conn, (uint8_t *)data, len ); telnet_process_buf( conn, (uint8_t *)data, len );
} else { } else {
@ -714,37 +702,16 @@ sendtxbuffer(serbridgeConnData *conn)
static sint8 ICACHE_FLASH_ATTR static sint8 ICACHE_FLASH_ATTR
espbuffsend_tn ( serbridgeConnData *conn, const char *data, uint16 len ) espbuffsend_tn ( serbridgeConnData *conn, const char *data, uint16 len )
{ {
// How many bytes for the new buffer? sint8 r ;
//
int n = 0 ; for ( char const *p=data ; p<data+len ; p++ ) {
for ( int i=0 ; i<len ; i++ ) if ( (r = espbuffsend( conn, p, 1 )) != 0 )
if ( data[i] == 0xFF ) return r ;
n++ ; if ( *p == '\xFF' && (r = espbuffsend( conn, p, 1 )) != 0 )
return r ;
// Allocate and populate new buffer if necessary
//
if ( n ) {
char *tnbuf = os_zalloc(len+n);
if ( tnbuf == NULL ) {
os_printf("espbuffsend: could not allocate buffer for telnet escape\n");
return -128;
}
n = 0 ;
for ( int i=0 ; i<len ; i++ ) {
tnbuf[n++] = data[i] ;
if ( data[i] == 0xFF )
tnbuf[n++] = 0xFF ;
}
// Send buffer
//
sint8 result = espbuffsend( conn, tnbuf, n );
os_free( tnbuf );
return result ;
} }
return espbuffsend( conn, data, len ); return 0;
} }
@ -937,23 +904,23 @@ serbridgeInitPins()
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, 4); PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, 4);
PIN_PULLUP_DIS(PERIPHS_IO_MUX_MTCK_U); PIN_PULLUP_DIS(PERIPHS_IO_MUX_MTCK_U);
if (flashConfig.rx_pullup) PIN_PULLUP_EN(PERIPHS_IO_MUX_MTDO_U); if (flashConfig.rx_pullup) PIN_PULLUP_EN(PERIPHS_IO_MUX_MTDO_U);
else PIN_PULLUP_DIS(PERIPHS_IO_MUX_MTDO_U); else PIN_PULLUP_DIS(PERIPHS_IO_MUX_MTDO_U);
system_uart_swap(); system_uart_swap();
} else { } else {
PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, 0); PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, 0);
PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, 0); PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, 0);
PIN_PULLUP_DIS(PERIPHS_IO_MUX_U0TXD_U); PIN_PULLUP_DIS(PERIPHS_IO_MUX_U0TXD_U);
if (flashConfig.rx_pullup) PIN_PULLUP_EN(PERIPHS_IO_MUX_U0RXD_U); if (flashConfig.rx_pullup) PIN_PULLUP_EN(PERIPHS_IO_MUX_U0RXD_U);
else PIN_PULLUP_DIS(PERIPHS_IO_MUX_U0RXD_U); else PIN_PULLUP_DIS(PERIPHS_IO_MUX_U0RXD_U);
system_uart_de_swap(); system_uart_de_swap();
} }
// set both pins to 1 before turning them on so we don't cause a reset // set both pins to 1 before turning them on so we don't cause a reset
if (mcu_isp_pin >= 0) GPIO_OUTPUT_SET(mcu_isp_pin, 1); if (mcu_isp_pin >= 0) GPIO_OUTPUT_SET(mcu_isp_pin, 1);
if (mcu_reset_pin >= 0) GPIO_OUTPUT_SET(mcu_reset_pin, 1); if (mcu_reset_pin >= 0) GPIO_OUTPUT_SET(mcu_reset_pin, 1);
// switch pin mux to make these pins GPIO pins // switch pin mux to make these pins GPIO pins
if (mcu_reset_pin >= 0) makeGpio(mcu_reset_pin); if (mcu_reset_pin >= 0) makeGpio(mcu_reset_pin);
if (mcu_isp_pin >= 0) makeGpio(mcu_isp_pin); if (mcu_isp_pin >= 0) makeGpio(mcu_isp_pin);
} }
// Start transparent serial bridge TCP server on specified port (typ. 23) // Start transparent serial bridge TCP server on specified port (typ. 23)

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