Henry-Hiles/qmk_userspace
1
0
Fork 0
forked from mirrors/qmk_userspace
Code Pull requests Activity

clang-format changes

Browse source
This commit is contained in:
skullY 2019-08-30 11:19:03 -07:00 • committed by skullydazed
parent 61af76a10d
commit b624f32f94
502 changed files with 32259 additions and 39062 deletions
Download patch file Download diff file Expand all files Collapse all files

18
drivers/avr/i2c_slave.c Executable file → Normal file
View file

@ -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++;