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port serbridge buffering rewrite from v1.0.3

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pull/49/head
Thorsten von Eicken 9 years ago
parent 215da43a44 2a8f7583ea
commit 6158d8f957
2 changed files with 107 additions and 85 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 174
      serial/serbridge.c
  2. 8
      serial/serbridge.h

174
serial/serbridge.c
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@ -23,15 +23,8 @@ static int8_t mcu_reset_pin, mcu_isp_pin;
extern uint8_t slip_disabled; // disable slip to allow flashing of attached MCU
static sint8 ICACHE_FLASH_ATTR espbuffsend(serbridgeConnData *conn, const char *data, uint16 len);
// Connection pool
serbridgeConnData connData[MAX_CONN];
// Given a pointer to an espconn struct find the connection that correcponds to it
static serbridgeConnData ICACHE_FLASH_ATTR *serbridgeFindConnData(void *arg) {
struct espconn *conn = arg;
return arg == NULL ? NULL : (serbridgeConnData *)conn->reverse;
}
//===== TCP -> UART
@ -135,7 +128,9 @@ telnetUnwrap(uint8_t *inBuf, int len, uint8_t state)
}
// Generate a reset pulse for the attached microcontroller
void ICACHE_FLASH_ATTR serbridgeReset() {
void ICACHE_FLASH_ATTR
serbridgeReset()
{
if (mcu_reset_pin >= 0) {
os_printf("MCU reset gpio%d\n", mcu_reset_pin);
GPIO_OUTPUT_SET(mcu_reset_pin, 0);
@ -145,8 +140,10 @@ void ICACHE_FLASH_ATTR serbridgeReset() {
}
// Receive callback
static void ICACHE_FLASH_ATTR serbridgeRecvCb(void *arg, char *data, unsigned short len) {
serbridgeConnData *conn = serbridgeFindConnData(arg);
static void ICACHE_FLASH_ATTR
serbridgeRecvCb(void *arg, char *data, unsigned short len)
{
serbridgeConnData *conn = ((struct espconn*)arg)->reverse;
//os_printf("Receive callback on conn %p\n", conn);
if (conn == NULL) return;
@ -188,8 +185,6 @@ static void ICACHE_FLASH_ATTR serbridgeRecvCb(void *arg, char *data, unsigned sh
conn->conn_mode = cmTransparent;
}
// Process return data on TCP client connections
} else if (conn->conn_mode == cmTcpClient) {
}
// write the buffer to the uart
@ -204,22 +199,24 @@ static void ICACHE_FLASH_ATTR serbridgeRecvCb(void *arg, char *data, unsigned sh
//===== UART -> TCP
// Transmit buffers for the connection pool
static char txbuffer[MAX_CONN][MAX_TXBUFFER];
// Send all data in conn->txbuffer
// returns result from espconn_sent if data in buffer or ESPCONN_OK (0)
// Use only internally from espbuffsend and serbridgeSentCb
static sint8 ICACHE_FLASH_ATTR
sendtxbuffer(serbridgeConnData *conn) {
sendtxbuffer(serbridgeConnData *conn)
{
sint8 result = ESPCONN_OK;
if (conn->txbufferlen != 0) {
//os_printf("%d TX %d\n", system_get_time(), conn->txbufferlen);
conn->readytosend = false;
result = espconn_sent(conn->conn, (uint8_t*)conn->txbuffer, conn->txbufferlen);
conn->txbufferlen = 0;
if (result != ESPCONN_OK) {
os_printf("sendtxbuffer: espconn_sent error %d on conn %p\n", result, conn);
conn->txbufferlen = 0;
} else {
conn->sentbuffer = conn->txbuffer;
conn->txbuffer = NULL;
conn->txbufferlen = 0;
}
}
return result;
@ -230,30 +227,65 @@ sendtxbuffer(serbridgeConnData *conn) {
// Returns ESPCONN_OK (0) for success, -128 if buffer is full or error from espconn_sent
// Use espbuffsend instead of espconn_sent as it solves the problem that espconn_sent must
// only be called *after* receiving an espconn_sent_callback for the previous packet.
static sint8 ICACHE_FLASH_ATTR
espbuffsend(serbridgeConnData *conn, const char *data, uint16 len) {
if (conn->txbufferlen + len > MAX_TXBUFFER) {
sint8 ICACHE_FLASH_ATTR
espbuffsend(serbridgeConnData *conn, const char *data, uint16 len)
{
if (conn->txbufferlen >= MAX_TXBUFFER) {
os_printf("espbuffsend: txbuffer full on conn %p\n", conn);
return -128;
}
os_memcpy(conn->txbuffer + conn->txbufferlen, data, len);
conn->txbufferlen += len;
if (conn->readytosend) {
return sendtxbuffer(conn);
} else {
//os_printf("%d QU %d\n", system_get_time(), conn->txbufferlen);
// make sure we indeed have a buffer
if (conn->txbuffer == NULL) conn->txbuffer = os_zalloc(MAX_TXBUFFER);
if (conn->txbuffer == NULL) {
os_printf("espbuffsend: cannot alloc tx buffer\n");
return -128;
}
return ESPCONN_OK;
// add to send buffer
uint16_t avail = conn->txbufferlen+len > MAX_TXBUFFER ? MAX_TXBUFFER-conn->txbufferlen : len;
os_memcpy(conn->txbuffer + conn->txbufferlen, data, avail);
conn->txbufferlen += avail;
// try to send
sint8 result = ESPCONN_OK;
if (conn->readytosend) result = sendtxbuffer(conn);
if (avail < len) {
// some data didn't fit into the buffer
if (conn->txbufferlen == 0) {
// we sent the prior buffer, so try again
return espbuffsend(conn, data+avail, len-avail);
}
os_printf("espbuffsend: txbuffer full on conn %p\n", conn);
return -128;
}
return result;
}
//callback after the data are sent
static void ICACHE_FLASH_ATTR
serbridgeSentCb(void *arg)
{
serbridgeConnData *conn = ((struct espconn*)arg)->reverse;
//os_printf("Sent callback on conn %p\n", conn);
if (conn == NULL) return;
//os_printf("%d ST\n", system_get_time());
if (conn->sentbuffer != NULL) os_free(conn->sentbuffer);
conn->sentbuffer = NULL;
conn->readytosend = true;
sendtxbuffer(conn); // send possible new data in txbuffer
}
void ICACHE_FLASH_ATTR
console_process(char *buf, short len) {
console_process(char *buf, short len)
{
// push buffer into web-console
for (short i=0; i<len; i++)
console_write_char(buf[i]);
// push the buffer into each open connection
for (short i=0; i<MAX_CONN; i++) {
if (connData[i].conn && connData[i].conn_mode != cmTcpClient) {
if (connData[i].conn) {
espbuffsend(&connData[i], buf, len);
}
}
@ -261,7 +293,8 @@ console_process(char *buf, short len) {
// callback with a buffer of characters that have arrived on the uart
void ICACHE_FLASH_ATTR
serbridgeUartCb(char *buf, short length) {
serbridgeUartCb(char *buf, short length)
{
if (!flashConfig.slip_enable || slip_disabled > 0) {
//os_printf("SLIP: disabled got %d\n", length);
console_process(buf, length);
@ -272,53 +305,41 @@ serbridgeUartCb(char *buf, short length) {
serledFlash(50); // short blink on serial LED
}
//callback after the data are sent
static void ICACHE_FLASH_ATTR
serbridgeSentCb(void *arg) {
serbridgeConnData *conn = serbridgeFindConnData(arg);
//os_printf("Sent callback on conn %p\n", conn);
if (conn == NULL) return;
//os_printf("%d ST\n", system_get_time());
conn->readytosend = true;
sendtxbuffer(conn); // send possible new data in txbuffer
}
//===== Connect / disconnect
// Error callback (it's really poorly named, it's not a "connection reconnected" callback,
// it's really a "connection broken, please reconnect" callback)
// Note that there is no DisconCb after a ReconCb
static void ICACHE_FLASH_ATTR serbridgeReconCb(void *arg, sint8 err) {
serbridgeConnData *sbConn = serbridgeFindConnData(arg);
if (sbConn == NULL) return;
if (sbConn->conn_mode == cmAVR) {
if (slip_disabled > 0) slip_disabled--;
}
// Close the connection
espconn_disconnect(sbConn->conn);
// free connection slot
sbConn->conn = NULL;
}
// Disconnection callback
static void ICACHE_FLASH_ATTR serbridgeDisconCb(void *arg) {
serbridgeConnData *sbConn = serbridgeFindConnData(arg);
if (sbConn == NULL) return;
// send reset to arduino/ARM
if (sbConn->conn_mode == cmAVR) {
if (slip_disabled > 0) slip_disabled--;
if (mcu_reset_pin >= 0) {
static void ICACHE_FLASH_ATTR
serbridgeDisconCb(void *arg)
{
serbridgeConnData *conn = ((struct espconn*)arg)->reverse;
if (conn == NULL) return;
// Free buffers
if (conn->sentbuffer != NULL) os_free(conn->sentbuffer);
conn->sentbuffer = NULL;
if (conn->txbuffer != NULL) os_free(conn->txbuffer);
conn->txbuffer = NULL;
conn->txbufferlen = 0;
// Send reset to attached uC if it was in programming mode
if (conn->conn_mode == cmAVR && mcu_reset_pin >= 0) {
GPIO_OUTPUT_SET(mcu_reset_pin, 0);
os_delay_us(100L);
GPIO_OUTPUT_SET(mcu_reset_pin, 1);
}
}
// free connection slot
sbConn->conn = NULL;
conn->conn = NULL;
}
// Connection reset callback (note that there will be no DisconCb)
static void ICACHE_FLASH_ATTR
serbridgeResetCb(void *arg, sint8 err)
{
os_printf("serbridge: connection reset err=%d\n", err);
serbridgeDisconCb(arg);
}
// New connection callback, use one of the connection descriptors, if we have one left.
static void ICACHE_FLASH_ATTR serbridgeConnectCb(void *arg) {
static void ICACHE_FLASH_ATTR
serbridgeConnectCb(void *arg)
{
struct espconn *conn = arg;
// Find empty conndata in pool
int i;
@ -331,16 +352,15 @@ static void ICACHE_FLASH_ATTR serbridgeConnectCb(void *arg) {
return;
}
conn->reverse = connData+i;
os_memset(connData+i, 0, sizeof(struct serbridgeConnData));
connData[i].conn = conn;
connData[i].txbufferlen = 0;
conn->reverse = connData+i;
connData[i].readytosend = true;
connData[i].telnet_state = 0;
connData[i].conn_mode = cmInit;
espconn_regist_recvcb(conn, serbridgeRecvCb);
espconn_regist_reconcb(conn, serbridgeReconCb);
espconn_regist_disconcb(conn, serbridgeDisconCb);
espconn_regist_reconcb(conn, serbridgeResetCb);
espconn_regist_sentcb(conn, serbridgeSentCb);
espconn_set_opt(conn, ESPCONN_REUSEADDR|ESPCONN_NODELAY);
@ -348,7 +368,9 @@ static void ICACHE_FLASH_ATTR serbridgeConnectCb(void *arg) {
//===== Initialization
void ICACHE_FLASH_ATTR serbridgeInitPins() {
void ICACHE_FLASH_ATTR
serbridgeInitPins()
{
mcu_reset_pin = flashConfig.reset_pin;
mcu_isp_pin = flashConfig.isp_pin;
os_printf("Serbridge pins: reset=%d isp=%d swap=%d\n",
@ -375,13 +397,13 @@ void ICACHE_FLASH_ATTR serbridgeInitPins() {
}
// 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)
{
serbridgeInitPins();
int i;
for (i = 0; i < MAX_CONN; i++) {
for (int i = 0; i < MAX_CONN; i++) {
connData[i].conn = NULL;
connData[i].txbuffer = txbuffer[i];
}
serbridgeConn.type = ESPCONN_TCP;
serbridgeConn.state = ESPCONN_NONE;

8
serial/serbridge.h
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@ -8,8 +8,8 @@
#define MAX_CONN 4
#define SER_BRIDGE_TIMEOUT 28799
//Max send buffer len
#define MAX_TXBUFFER 1024
// Send buffer size
#define MAX_TXBUFFER 2048
enum connModes {
cmInit = 0, // initialization mode: nothing received yet
@ -18,7 +18,6 @@ enum connModes {
cmARM, // ARM (LPC8xx) programming
cmEcho, // simply echo characters (used for debugging latency)
cmTelnet, // use telnet escape sequences for programming mode
cmTcpClient, // client connection (initiated via serial)
};
typedef struct serbridgeConnData {
@ -26,7 +25,8 @@ typedef struct serbridgeConnData {
enum connModes conn_mode; // connection mode
char *txbuffer; // buffer for the data to send
uint16 txbufferlen; // length of data in txbuffer
bool readytosend; // true, if txbuffer can send by espconn_sent
char *sentbuffer; // buffer sent, awaiting callback to get freed
bool readytosend; // true, if txbuffer can be sent by espconn_sent
uint8_t telnet_state;
} serbridgeConnData;

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