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chg: sc reader - get atr

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This commit is contained in:
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))
*/
// 通讯延迟函数 ommunication delay function
#define I2C_DELAY_1CLK I2C_DELAY_1()
#define I2C_DELAY_2CLK I2C_DELAY_2()
#define I2C_DELAY_XCLK(x) I2C_DELAY_X((x))
void I2C_DELAY_1(void) { I2CSpinDelayClk(1);}
void I2C_DELAY_2(void) { I2CSpinDelayClk(2);}
void I2C_DELAY_X(uint16_t delay) { I2CSpinDelayClk(delay);}
#define I2C_DELAY_1CLK I2CSpinDelayClk(1)
#define I2C_DELAY_2CLK I2CSpinDelayClk(2)
#define I2C_DELAY_XCLK(x) I2CSpinDelayClk((x))
//void I2C_DELAY_1(void) { I2CSpinDelayClk(1);}
//void I2C_DELAY_2(void) { I2CSpinDelayClk(2);}
//void I2C_DELAY_X(uint16_t delay) { I2CSpinDelayClk(delay);}
void I2C_init(void) {
// 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.
bool WaitSCL_H(void) {
volatile uint16_t count = 50000;
volatile uint16_t delay = 5000;
while (delay--) {
while (count--) {
if (SCL_read) {
return true;
}
@ -124,6 +125,20 @@ bool WaitSCL_H(void) {
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) {
I2C_DELAY_XCLK(4);
@ -499,17 +514,7 @@ void I2C_print_status(void) {
DbpString(" FW version................FAILED");
}
#define WAIT_SCL_MAX_300
#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);
}
#define WAIT_UNTIL_SCL_GOES_HIGH { while (!SCL_read) { SpinDelay(1); } }
bool GetATR(smart_card_atr_t *card_ptr) {
if ( card_ptr ) {
@ -517,17 +522,23 @@ bool GetATR(smart_card_atr_t *card_ptr) {
memset(card_ptr->atr, 0, sizeof(card_ptr->atr));
}
if ( MF_DBGLEVEL > 3 ) DbpString("before sending GET_ATR");
// Send ATR
// start [C0 01] stop
I2C_WriteCmd(I2C_DEVICE_CMD_GENERATE_ATR, I2C_DEVICE_ADDRESS_MAIN);
// variable delay here.
if (!WaitSCL_300())
if (!WaitSCL_300ms()) {
if ( MF_DBGLEVEL > 3 ) DbpString(" 300ms SCL delay failed");
return false;
}
// 8051 speaks with smart card.
WAIT_UNTIL_SCL_GOES_HIGH;
if ( MF_DBGLEVEL > 3 ) DbpString("before reading");
// 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);