diff options
Diffstat (limited to 'drivers/avr/i2c_slave.c')
| -rw-r--r--[-rwxr-xr-x] | drivers/avr/i2c_slave.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/avr/i2c_slave.c b/drivers/avr/i2c_slave.c index 4958a0f8e..3fb684f70 100755..100644 --- a/drivers/avr/i2c_slave.c +++ b/drivers/avr/i2c_slave.c @@ -27,24 +27,24 @@ volatile uint8_t i2c_slave_reg[I2C_SLAVE_REG_COUNT]; static volatile uint8_t buffer_address; -static volatile bool slave_has_register_set = false; +static volatile bool slave_has_register_set = false; -void i2c_slave_init(uint8_t address){ +void i2c_slave_init(uint8_t address) { // load address into TWI address register TWAR = address; // set the TWCR to enable address matching and enable TWI, clear TWINT, enable TWI interrupt TWCR = (1 << TWIE) | (1 << TWEA) | (1 << TWINT) | (1 << TWEN); } -void i2c_slave_stop(void){ +void i2c_slave_stop(void) { // clear acknowledge and enable bits TWCR &= ~((1 << TWEA) | (1 << TWEN)); } -ISR(TWI_vect){ +ISR(TWI_vect) { uint8_t ack = 1; - switch(TW_STATUS){ + switch (TW_STATUS) { case TW_SR_SLA_ACK: // The device is now a slave receiver slave_has_register_set = false; @@ -53,14 +53,14 @@ ISR(TWI_vect){ case TW_SR_DATA_ACK: // This device is a slave receiver and has received data // First byte is the location then the bytes will be writen in buffer with auto-incriment - if(!slave_has_register_set){ + if (!slave_has_register_set) { buffer_address = TWDR; if (buffer_address >= I2C_SLAVE_REG_COUNT) { // address out of bounds dont ack - ack = 0; - buffer_address = 0; + ack = 0; + buffer_address = 0; } - slave_has_register_set = true; // address has been receaved now fill in buffer + slave_has_register_set = true; // address has been receaved now fill in buffer } else { i2c_slave_reg[buffer_address] = TWDR; buffer_address++; |