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PN532: Enable 1ms ClockStretch 

Enable 1ms clock stretch as per datasheet Table 12.25 (Timing for the I2C interface)
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Andre Thomas 2019-01-05 22:05:53 +02:00 committed by GitHub
parent 9da900dfb8
commit 8d1dee8929
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1 changed files with 2 additions and 0 deletions
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sonoff/xsns_40_pn532_i2c.ino
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@ -239,6 +239,8 @@ bool PN532_SAMConfig(void)
void PN532_Detect(void) void PN532_Detect(void)
{ {
if ((pn532_i2c_detected) || (pn532_i2c_disable)) { return; } if ((pn532_i2c_detected) || (pn532_i2c_disable)) { return; }
Wire.setClockStretchLimit(1000); // Enable 1ms clock stretch as per datasheet Table 12.25 (Timing for the I2C interface)
uint32_t ver = PN532_getFirmwareVersion(); uint32_t ver = PN532_getFirmwareVersion();
if (ver) { if (ver) {