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Commit 55786418 authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
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SoftI2C: Support Clock Stretching

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src/driver/soft_i2c.cc
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...@@ -54,6 +54,7 @@ bool SoftI2C::tx(unsigned char byte) ...@@ -54,6 +54,7 @@ bool SoftI2C::tx(unsigned char byte)
byte <<= 1; byte <<= 1;
// //
SCL_HIGH; SCL_HIGH;
while (!gpio.read(scl)) ;
// //
if (i == 8) { if (i == 8) {
if (!gpio.read(sda)) { if (!gpio.read(sda)) {
...@@ -73,6 +74,7 @@ unsigned char SoftI2C::rx(bool send_ack) ...@@ -73,6 +74,7 @@ unsigned char SoftI2C::rx(bool send_ack)
for (unsigned char i = 0; i <= 8; i++) { for (unsigned char i = 0; i <= 8; i++) {
// //
SCL_HIGH; SCL_HIGH;
while (!gpio.read(scl)) ;
// //
if ((i < 8) && gpio.read(sda)) { if ((i < 8) && gpio.read(sda)) {
byte |= 1 << (7 - i); byte |= 1 << (7 - i);
...@@ -137,7 +139,7 @@ signed char SoftI2C::xmit(unsigned char address, ...@@ -137,7 +139,7 @@ signed char SoftI2C::xmit(unsigned char address,
#ifdef MULTIPASS_ARCH_esp8266 #ifdef MULTIPASS_ARCH_esp8266
SoftI2C i2c(GPIO::d7, GPIO::d8); SoftI2C i2c(GPIO::d7, GPIO::d8);
#elif MULTIPASS_ARCH_arduino_nano #elif MULTIPASS_ARCH_arduino_nano
SoftI2C i2c(GPIO::pc5, GPIO::pc4); SoftI2C i2c(GPIO::pc4, GPIO::pc5);
#elif MULTIPASS_ARCH_msp430fr5969lp #elif MULTIPASS_ARCH_msp430fr5969lp
SoftI2C i2c(GPIO::p1_6, GPIO::p1_7); SoftI2C i2c(GPIO::p1_6, GPIO::p1_7);
#endif #endif
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