arduino/esp8266
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Improve i2c waveforms

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This commit is contained in:
Ivan Grokhotkov 2015-03-19 23:45:03 +03:00
parent 71c705a187
commit c3b428162f
1 changed files with 1 additions and 4 deletions
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5
cores/esp8266/i2c.cpp
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@ -132,7 +132,6 @@ void i2c_set_ack(int ack)
int i2c_get_ack() int i2c_get_ack()
{ {
i2c_wait();
i2c_set_scl(1); i2c_set_scl(1);
i2c_wait(); i2c_wait();
int result = i2c_get_sda(); int result = i2c_get_sda();
@ -153,9 +152,7 @@ uint8_t i2c_read(void)
i2c_wait(); i2c_wait();
result <<= 1; result <<= 1;
result |= i2c_get_sda(); result |= i2c_get_sda();
i2c_wait(); // <- remove
i2c_set_scl(0); i2c_set_scl(0);
i2c_wait();
} }
return result; return result;
} }
@ -170,8 +167,8 @@ void i2c_write(uint8_t val)
i2c_set_scl(1); i2c_set_scl(1);
i2c_wait(); i2c_wait();
i2c_set_scl(0); i2c_set_scl(0);
i2c_wait();
} }
i2c_wait();
i2c_set_sda(1); i2c_set_sda(1);
} }