#endif
-// ¶¨ÒåÁ¬½ÓÒý½Å
#define GPIO_RST AT91C_PIO_PA1
#define GPIO_SCL AT91C_PIO_PA5
#define GPIO_SDA AT91C_PIO_PA7
for (c = delay * 2; c; c--) {};
}
-// ͨѶÑÓ³Ùº¯Êý communication delay function
+// communication delay functions
#define I2C_DELAY_1CLK I2CSpinDelayClk(1)
#define I2C_DELAY_2CLK I2CSpinDelayClk(2)
#define I2C_DELAY_XCLK(x) I2CSpinDelayClk((x))
-
#define ISO7618_MAX_FRAME 255
+// try i2c bus recovery at 100kHz = 5uS high, 5uS low
+static void I2C_recovery(void) {
+
+ DbpString("Performing i2c bus recovery");
+
+ // reset I2C
+ SDA_H; SCL_H;
+
+ //9nth cycle acts as NACK
+ for (int i = 0; i < 10; i++) {
+ SCL_H; WaitUS(5);
+ SCL_L; WaitUS(5);
+ }
+
+ //a STOP signal (SDA from low to high while CLK is high)
+ SDA_L; WaitUS(5);
+ SCL_H; WaitUS(2);
+ SDA_H; WaitUS(2);
+
+ bool isok = (SCL_read && SDA_read);
+ if (!SDA_read)
+ DbpString("I2C bus recovery error: SDA still LOW");
+ if (!SCL_read)
+ DbpString("I2C bus recovery error: SCL still LOW");
+ if (isok)
+ DbpString("I2C bus recovery complete");
+}
+
static void I2C_init(void) {
// Configure reset pin
AT91C_BASE_PIOA->PIO_PPUDR = GPIO_RST; // disable pull up resistor
// configure all three pins as output, controlled by PIOA
AT91C_BASE_PIOA->PIO_OER |= (GPIO_SCL | GPIO_SDA | GPIO_RST);
AT91C_BASE_PIOA->PIO_PER |= (GPIO_SCL | GPIO_SDA | GPIO_RST);
-}
+ bool isok = (SCL_read && SDA_read);
+ if ( !isok )
+ I2C_recovery();
+
+}
-// ÉèÖø´Î»×´Ì¬
// set the reset state
static void I2C_SetResetStatus(uint8_t LineRST, uint8_t LineSCK, uint8_t LineSDA) {
if (LineRST)
LOW(GPIO_SDA);
}
-// ¸´Î»½øÈëÖ÷³ÌÐò
// Reset the SIM_Adapter, then enter the main program
// Note: the SIM_Adapter will not enter the main program after power up. Please run this function before use SIM_Adapter.
static void I2C_Reset_EnterMainProgram(void) {
- I2C_SetResetStatus(0, 0, 0); // ÀµÍ¸´Î»Ïß
- SpinDelay(30);
- I2C_SetResetStatus(1, 0, 0); // ½â³ý¸´Î»
- SpinDelay(30);
- I2C_SetResetStatus(1, 1, 1); // À¸ßÊý¾ÝÏß
- SpinDelay(10);
+ StartTicks();
+ I2C_init();
+ I2C_SetResetStatus(0, 0, 0);
+ WaitMS(30);
+ I2C_SetResetStatus(1, 0, 0);
+ WaitMS(30);
+ I2C_SetResetStatus(1, 1, 1);
+ WaitMS(10);
}
-// µÈ´ýʱÖÓ±ä¸ß
// Wait for the clock to go High.
static bool WaitSCL_H_delay(uint32_t delay) {
while (delay--) {
uint8_t bits = 8;
while (bits--) {
- SCL_L; I2C_DELAY_1CLK;
+ SCL_L;
+ I2C_DELAY_1CLK;
if (data & 0x80)
SDA_H;
}
bool I2C_is_available(void) {
- I2C_init();
I2C_Reset_EnterMainProgram();
if (!I2C_Start()) // some other device is active on the bus
return true;
}
#ifdef WITH_SMARTCARD
-// ¸´Î»½øÈëÒýµ¼Ä£Ê½
// Reset the SIM_Adapter, then enter the bootloader program
// Reserve£ºFor firmware update.
static void I2C_Reset_EnterBootloader(void) {
- I2C_SetResetStatus(0, 1, 1); // ÀµÍ¸´Î»Ïß
- SpinDelay(100);
- I2C_SetResetStatus(1, 1, 1); // ½â³ý¸´Î»
- SpinDelay(10);
+ I2C_SetResetStatus(0, 1, 1);
+ WaitMS(100);
+ I2C_SetResetStatus(1, 1, 1);
+ WaitMS(10);
}
-// Wait max 300ms or until SCL goes LOW.
+// Wait max 1800ms or until SCL goes LOW.
+// It timeout reading response from card
// Which ever comes first
-static bool WaitSCL_L_300ms(void) {
- volatile uint16_t delay = 310;
+bool WaitSCL_L_timeout(void){
+ volatile uint16_t delay = 1800;
while ( delay-- ) {
// exit on SCL LOW
if (!SCL_read)
return true;
- SpinDelay(1);
+ WaitMS(1);
}
return (delay == 0);
}
static bool I2C_WaitForSim() {
- // variable delay here.
- if (!WaitSCL_L_300ms())
+ // wait for data from card
+ if (!WaitSCL_L_timeout())
return false;
// 8051 speaks with smart card.
do {
if (!I2C_Start())
return false;
- //[C0]
+
I2C_SendByte(device_address & 0xFE);
if (!I2C_WaitAck())
break;
return true;
}
-// дÈë1×Ö½ÚÊý¾Ý £¨´ýдÈëÊý¾Ý£¬´ýдÈëµØÖ·£¬Æ÷¼þÀàÐÍ£©
// Sends 1 byte data (Data to be written, command to be written , SlaveDevice address ).
static bool I2C_WriteByte(uint8_t data, uint8_t device_cmd, uint8_t device_address) {
bool bBreak = true;
return true;
}
-// дÈë1´®Êý¾Ý£¨´ýдÈëÊý×éµØÖ·£¬´ýдÈ볤¶È£¬´ýдÈëµØÖ·£¬Æ÷¼þÀàÐÍ£©
//Sends a string of data (Array, length, command to be written , SlaveDevice address ).
// len = uint8 (max buffer to write 256bytes)
static bool I2C_BufferWrite(uint8_t *data, uint8_t len, uint8_t device_cmd, uint8_t device_address) {
return true;
}
-// ¶Á³ö1´®Êý¾Ý£¨´æ·Å¶Á³öÊý¾Ý£¬´ý¶Á³ö³¤¶È£¬´ø¶Á³öµØÖ·£¬Æ÷¼þÀàÐÍ£©
// read 1 strings of data (Data array, Readout length, command to be written , SlaveDevice address ).
// len = uint8 (max buffer to read 256bytes)
static int16_t I2C_BufferRead(uint8_t *data, uint8_t len, uint8_t device_cmd, uint8_t device_address) {
// extra wait 500us (514us measured)
// 200us (xx measured)
- SpinDelayUs(600);
+ WaitUS(600);
bool bBreak = true;
uint16_t readcount = 0;
}
I2C_Stop();
+
// return bytecount - first byte (which is length byte)
return --readcount;
}
if (!I2C_WaitAck())
break;
- // msb
I2C_SendByte(msb);
if (!I2C_WaitAck())
break;
- // lsb
I2C_SendByte(lsb);
if (!I2C_WaitAck())
break;
if (!I2C_WaitAck())
break;
- // msb
I2C_SendByte(msb);
if (!I2C_WaitAck())
break;
- // lsb
I2C_SendByte(lsb);
if (!I2C_WaitAck())
break;
void I2C_print_status(void) {
DbpString("Smart card module (ISO 7816)");
uint8_t resp[] = {0,0,0,0};
- I2C_init();
I2C_Reset_EnterMainProgram();
uint8_t len = I2C_BufferRead(resp, sizeof(resp), I2C_DEVICE_CMD_GETVERSION, I2C_DEVICE_ADDRESS_MAIN);
if ( len > 0 )
// Send ATR
// start [C0 01] stop start C1 len aa bb cc stop]
I2C_WriteCmd(I2C_DEVICE_CMD_GENERATE_ATR, I2C_DEVICE_ADDRESS_MAIN);
- uint8_t cmd[1] = {1};
- LogTrace(cmd, 1, 0, 0, NULL, true);
// wait for sim card to answer.
// 1byte = 1ms, max frame 256bytes. Should wait 256ms at least just in case.
if ( !sc_rx_bytes(card_ptr->atr, &len) )
return false;
- uint8_t pos_td = 1;
- if ( (card_ptr->atr[1] & 0x10) == 0x10) pos_td++;
- if ( (card_ptr->atr[1] & 0x20) == 0x20) pos_td++;
- if ( (card_ptr->atr[1] & 0x40) == 0x40) pos_td++;
-
- // T0 indicate presence T=0 vs T=1. T=1 has checksum TCK
- if ( (card_ptr->atr[1] & 0x80) == 0x80) {
-
- pos_td++;
-
- // 1 == T1 , presence of checksum TCK
- if ( (card_ptr->atr[pos_td] & 0x01) == 0x01) {
- uint8_t chksum = 0;
- // xor property. will be zero when xored with chksum.
- for (uint8_t i = 1; i < len; ++i)
- chksum ^= card_ptr->atr[i];
- if ( chksum ) {
- if ( MF_DBGLEVEL > 2) DbpString("Wrong ATR checksum");
- }
- }
- }
-
- // for some reason we only get first byte of atr, if that is so, send dummy command to retrieve the rest of the atr
- if (len == 1) {
-
- uint8_t data[1] = {0};
- I2C_BufferWrite(data, len, I2C_DEVICE_CMD_SEND, I2C_DEVICE_ADDRESS_MAIN);
-
- if ( !I2C_WaitForSim() )
- return false;
-
- uint8_t len2 = I2C_BufferRead(card_ptr->atr + len, sizeof(card_ptr->atr) - len, I2C_DEVICE_CMD_READ, I2C_DEVICE_ADDRESS_MAIN);
- len = len + len2;
- }
-
card_ptr->atr_len = len;
LogTrace(card_ptr->atr, card_ptr->atr_len, 0, 0, NULL, false);
LED_D_ON();
clear_trace();
set_tracing(true);
- I2C_init();
I2C_Reset_EnterMainProgram();
bool isOK = GetATR( &card );
cmd_send(CMD_ACK, isOK, sizeof(smart_card_atr_t), 0, &card, sizeof(smart_card_atr_t));
if ((flags & SC_CONNECT)) {
- I2C_init();
I2C_Reset_EnterMainProgram();
- if ( !(flags & SC_NO_SELECT) ) {
+ if ((flags & SC_SELECT)) {
smart_card_atr_t card;
bool gotATR = GetATR( &card );
//cmd_send(CMD_ACK, gotATR, sizeof(smart_card_atr_t), 0, &card, sizeof(smart_card_atr_t));
}
}
- if ((flags & SC_RAW)) {
+ if ((flags & SC_RAW) || (flags & SC_RAW_T0)) {
LogTrace(data, arg1, 0, 0, NULL, true);
// Send raw bytes
// asBytes = A0 A4 00 00 02
// arg1 = len 5
- I2C_BufferWrite(data, arg1, I2C_DEVICE_CMD_SEND, I2C_DEVICE_ADDRESS_MAIN);
-
- if ( !I2C_WaitForSim() )
- goto OUT;
+ bool res = I2C_BufferWrite(data, arg1, ((flags & SC_RAW_T0) ? I2C_DEVICE_CMD_SEND_T0 : I2C_DEVICE_CMD_SEND), I2C_DEVICE_ADDRESS_MAIN);
+ if ( !res && MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
// read bytes from module
len = ISO7618_MAX_FRAME;
- sc_rx_bytes(resp, &len);
- LogTrace(resp, len, 0, 0, NULL, false);
+ res = sc_rx_bytes(resp, &len);
+ if ( res ) {
+ LogTrace(resp, len, 0, 0, NULL, false);
+ } else {
+ len = 0;
+ }
}
OUT:
cmd_send(CMD_ACK, len, 0, 0, resp, len);
+ BigBuf_free();
set_tracing(false);
LEDsoff();
}
// write. Sector0, with 11,22,33,44
// erase is 128bytes, and takes 50ms to execute
- I2C_init();
I2C_Reset_EnterBootloader();
bool isOK = true;
}
// writing takes time.
- SpinDelay(50);
+ WaitMS(50);
// read
res = I2C_ReadFW(verfiydata, size, msb, lsb, I2C_DEVICE_ADDRESS_BOOT);
}
cmd_send(CMD_ACK, isOK, pos, 0, 0, 0);
LED_C_OFF();
+ BigBuf_free();
}
// unfinished (or not needed?)
void SmartCardSetClock(uint64_t arg0) {
LED_D_ON();
set_tracing(true);
- I2C_init();
I2C_Reset_EnterMainProgram();
// Send SIM CLC
projects / proxmark3-svn / blobdiff