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authorGravatar William Chang <william@factual.com>2019-11-20 22:17:07 -0800
committerGravatar William Chang <william@factual.com>2019-11-20 22:17:07 -0800
commite7f4d56592b3975c38af329e77b4efd9108495e8 (patch)
tree0a416bccbf70bfdbdb9ffcdb3bf136b47378c014 /quantum/serial_link/protocol/byte_stuffer.c
parent71493b2f9bbd5f3d18373c518fa14ccafcbf48fc (diff)
parent8416a94ad27b3ff058576f09f35f0704a8b39ff3 (diff)
downloadqmk_firmware-e7f4d56592b3975c38af329e77b4efd9108495e8.tar.gz
Merge remote-tracking branch 'upstream/master'
Diffstat (limited to 'quantum/serial_link/protocol/byte_stuffer.c')
-rw-r--r--quantum/serial_link/protocol/byte_stuffer.c55
1 files changed, 24 insertions, 31 deletions
diff --git a/quantum/serial_link/protocol/byte_stuffer.c b/quantum/serial_link/protocol/byte_stuffer.c
index 2c87d64c2..d3a91d828 100644
--- a/quantum/serial_link/protocol/byte_stuffer.c
+++ b/quantum/serial_link/protocol/byte_stuffer.c
@@ -34,21 +34,21 @@ SOFTWARE.
typedef struct byte_stuffer_state {
uint16_t next_zero;
uint16_t data_pos;
- bool long_frame;
- uint8_t data[MAX_FRAME_SIZE];
-}byte_stuffer_state_t;
+ bool long_frame;
+ uint8_t data[MAX_FRAME_SIZE];
+} byte_stuffer_state_t;
static byte_stuffer_state_t states[NUM_LINKS];
void init_byte_stuffer_state(byte_stuffer_state_t* state) {
- state->next_zero = 0;
- state->data_pos = 0;
+ state->next_zero = 0;
+ state->data_pos = 0;
state->long_frame = false;
}
void init_byte_stuffer(void) {
int i;
- for (i=0;i<NUM_LINKS;i++) {
+ for (i = 0; i < NUM_LINKS; i++) {
init_byte_stuffer_state(&states[i]);
}
}
@@ -57,9 +57,9 @@ void byte_stuffer_recv_byte(uint8_t link, uint8_t data) {
byte_stuffer_state_t* state = &states[link];
// Start of a new frame
if (state->next_zero == 0) {
- state->next_zero = data;
+ state->next_zero = data;
state->long_frame = data == 0xFF;
- state->data_pos = 0;
+ state->data_pos = 0;
return;
}
@@ -70,33 +70,28 @@ void byte_stuffer_recv_byte(uint8_t link, uint8_t data) {
if (state->data_pos > 0) {
validator_recv_frame(link, state->data, state->data_pos);
}
- }
- else {
+ } else {
// The frame is invalid, so reset
init_byte_stuffer_state(state);
}
- }
- else {
+ } else {
if (state->data_pos == MAX_FRAME_SIZE) {
// We exceeded our maximum frame size
// therefore there's nothing else to do than reset to a new frame
- state->next_zero = data;
+ state->next_zero = data;
state->long_frame = data == 0xFF;
- state->data_pos = 0;
- }
- else if (state->next_zero == 0) {
+ state->data_pos = 0;
+ } else if (state->next_zero == 0) {
if (state->long_frame) {
// This is part of a long frame, so continue
- state->next_zero = data;
+ state->next_zero = data;
state->long_frame = data == 0xFF;
- }
- else {
+ } else {
// Special case for zeroes
- state->next_zero = data;
+ state->next_zero = data;
state->data[state->data_pos++] = 0;
}
- }
- else {
+ } else {
state->data[state->data_pos++] = data;
}
}
@@ -105,7 +100,7 @@ void byte_stuffer_recv_byte(uint8_t link, uint8_t data) {
static void send_block(uint8_t link, uint8_t* start, uint8_t* end, uint8_t num_non_zero) {
send_data(link, &num_non_zero, 1);
if (end > start) {
- send_data(link, start, end-start);
+ send_data(link, start, end - start);
}
}
@@ -113,24 +108,22 @@ void byte_stuffer_send_frame(uint8_t link, uint8_t* data, uint16_t size) {
const uint8_t zero = 0;
if (size > 0) {
uint16_t num_non_zero = 1;
- uint8_t* end = data + size;
- uint8_t* start = data;
+ uint8_t* end = data + size;
+ uint8_t* start = data;
while (data < end) {
if (num_non_zero == 0xFF) {
// There's more data after big non-zero block
// So send it, and start a new block
send_block(link, start, data, num_non_zero);
- start = data;
+ start = data;
num_non_zero = 1;
- }
- else {
+ } else {
if (*data == 0) {
// A zero encountered, so send the block
send_block(link, start, data, num_non_zero);
- start = data + 1;
+ start = data + 1;
num_non_zero = 1;
- }
- else {
+ } else {
num_non_zero++;
}
++data;