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chg:'i2c' timeouts..

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This commit is contained in:
Chris 2018-07-06 16:01:23 +02:00
parent 5dbebb3dc8
commit a5d1ec0b22
1 changed files with 10 additions and 8 deletions
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18
common/i2c.c
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@ -111,12 +111,8 @@ void I2C_Reset_EnterBootloader(void) {
// 等待时钟变高
// Wait for the clock to go High.
bool WaitSCL_H(void) {
volatile uint16_t delay = 5000;
bool WaitSCL_H_delay(uint32_t delay) {
while (delay--) {
if (SCL_read) {
return true;
}
@ -125,6 +121,9 @@ bool WaitSCL_H(void) {
return false;
}
bool WaitSCL_H(void) {
return WaitSCL_H_delay(5000);
}
// Wait max 300ms or until SCL goes LOW.
// Which ever comes first
bool WaitSCL_300ms(void){
@ -514,7 +513,6 @@ void I2C_print_status(void) {
DbpString(" FW version................FAILED");
}
#define WAIT_UNTIL_SCL_GOES_HIGH { while (!SCL_read) { SpinDelay(1); } }
bool GetATR(smart_card_atr_t *card_ptr) {
if ( card_ptr ) {
@ -530,12 +528,16 @@ bool GetATR(smart_card_atr_t *card_ptr) {
// variable delay here.
if (!WaitSCL_300ms()) {
if ( MF_DBGLEVEL > 3 ) DbpString(" 300ms SCL delay failed");
if ( MF_DBGLEVEL > 3 ) DbpString(" 300ms SCL delay - timed out");
return false;
}
// 8051 speaks with smart card.
WAIT_UNTIL_SCL_GOES_HIGH;
// 50ms timeout?
if (!WaitSCL_H_delay(1500*50) ) {
if ( MF_DBGLEVEL > 3 ) DbpString("wait for SCL HIGH - timed out");
return false;
}
if ( MF_DBGLEVEL > 3 ) DbpString("before reading");