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NACK last byte when read

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The TCS34725 RGB color sensor works reliably with this change. See #535 for details.
This commit is contained in:
bbx10node 2015-07-14 21:07:35 -10:00
parent dece240830
commit 87001fea23
1 changed files with 8 additions and 7 deletions
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3
cores/esp8266/core_esp8266_si2c.c
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@ -166,7 +166,8 @@ unsigned char twi_readFrom(unsigned char address, unsigned char* buf, unsigned i
unsigned int i;
if(!twi_write_start()) return 4;//line busy
if(!twi_write_byte(((address << 1) | 1) & 0xFF)) return 2;//received NACK on transmit of address
for(i=0; i<len; i++) buf[i] = twi_read_byte(false);
for(i=0; i<(len-1); i++) buf[i] = twi_read_byte(false);
buf[len-1] = twi_read_byte(true);
if(sendStop) twi_write_stop();
i = 0;
while(SDA_READ() == 0 && (i++) < 10){