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chg: sc reader - get atr

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Chris 2018-07-06 15:20:21 +02:00
parent bcffde1198
commit 5dbebb3dc8
1 changed files with 31 additions and 20 deletions
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51
common/i2c.c
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@ -39,12 +39,12 @@ void __attribute__((optimize("O0"))) I2CSpinDelayClk(uint16_t delay) {
#define I2C_DELAY_XCLK(x) I2CSpinDelayClk((x)) #define I2C_DELAY_XCLK(x) I2CSpinDelayClk((x))
*/ */
// 通讯延迟函数 ommunication delay function // 通讯延迟函数 ommunication delay function
#define I2C_DELAY_1CLK I2C_DELAY_1() #define I2C_DELAY_1CLK I2CSpinDelayClk(1)
#define I2C_DELAY_2CLK I2C_DELAY_2() #define I2C_DELAY_2CLK I2CSpinDelayClk(2)
#define I2C_DELAY_XCLK(x) I2C_DELAY_X((x)) #define I2C_DELAY_XCLK(x) I2CSpinDelayClk((x))
void I2C_DELAY_1(void) { I2CSpinDelayClk(1);} //void I2C_DELAY_1(void) { I2CSpinDelayClk(1);}
void I2C_DELAY_2(void) { I2CSpinDelayClk(2);} //void I2C_DELAY_2(void) { I2CSpinDelayClk(2);}
void I2C_DELAY_X(uint16_t delay) { I2CSpinDelayClk(delay);} //void I2C_DELAY_X(uint16_t delay) { I2CSpinDelayClk(delay);}
void I2C_init(void) { void I2C_init(void) {
// 配置复位引脚，关闭上拉，推挽输出，默认高 // 配置复位引脚，关闭上拉，推挽输出，默认高
@ -113,9 +113,10 @@ void I2C_Reset_EnterBootloader(void) {
// Wait for the clock to go High. // Wait for the clock to go High.
bool WaitSCL_H(void) { bool WaitSCL_H(void) {
volatile uint16_t count = 50000; volatile uint16_t delay = 5000;
while (count--) { while (delay--) {
if (SCL_read) { if (SCL_read) {
return true; return true;
} }
@ -124,6 +125,20 @@ bool WaitSCL_H(void) {
return false; return false;
} }
// Wait max 300ms or until SCL goes LOW.
// Which ever comes first
bool WaitSCL_300ms(void){
volatile uint16_t delay = 300;
while ( delay-- ) {
if (!SCL_read)
return true;
SpinDelay(1);
}
return (delay == 0);
}
bool I2C_Start(void) { bool I2C_Start(void) {
I2C_DELAY_XCLK(4); I2C_DELAY_XCLK(4);
@ -499,35 +514,31 @@ void I2C_print_status(void) {
DbpString(" FW version................FAILED"); DbpString(" FW version................FAILED");
} }
#define WAIT_SCL_MAX_300 #define WAIT_UNTIL_SCL_GOES_HIGH { while (!SCL_read) { SpinDelay(1); } }
#define WAIT_UNTIL_SCL_GOES_HIGH while (!SCL_read) { I2C_DELAY_1CLK; }
bool WaitSCL_300(void){
volatile uint16_t delay = 300;
while ( SCL_read || delay ) {
SpinDelay(1);
delay--;
}
return (delay == 0);
}
bool GetATR(smart_card_atr_t *card_ptr) { bool GetATR(smart_card_atr_t *card_ptr) {
if ( card_ptr ) { if ( card_ptr ) {
card_ptr->atr_len = 0; card_ptr->atr_len = 0;
memset(card_ptr->atr, 0, sizeof(card_ptr->atr)); memset(card_ptr->atr, 0, sizeof(card_ptr->atr));
} }
if ( MF_DBGLEVEL > 3 ) DbpString("before sending GET_ATR");
// Send ATR // Send ATR
// start [C0 01] stop // start [C0 01] stop
I2C_WriteCmd(I2C_DEVICE_CMD_GENERATE_ATR, I2C_DEVICE_ADDRESS_MAIN); I2C_WriteCmd(I2C_DEVICE_CMD_GENERATE_ATR, I2C_DEVICE_ADDRESS_MAIN);
// variable delay here. // variable delay here.
if (!WaitSCL_300()) if (!WaitSCL_300ms()) {
if ( MF_DBGLEVEL > 3 ) DbpString(" 300ms SCL delay failed");
return false; return false;
}
// 8051 speaks with smart card. // 8051 speaks with smart card.
WAIT_UNTIL_SCL_GOES_HIGH; WAIT_UNTIL_SCL_GOES_HIGH;
if ( MF_DBGLEVEL > 3 ) DbpString("before reading");
// start [C0 03 start C1 len aa bb cc stop] // start [C0 03 start C1 len aa bb cc stop]
uint8_t len = I2C_BufferRead(card_ptr->atr, sizeof(card_ptr->atr), I2C_DEVICE_CMD_READ, I2C_DEVICE_ADDRESS_MAIN); uint8_t len = I2C_BufferRead(card_ptr->atr, sizeof(card_ptr->atr), I2C_DEVICE_CMD_READ, I2C_DEVICE_ADDRESS_MAIN);