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remove triggering error message based on counter values

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Since all bit errors already trigger sending a error msg,
remove the code triggering on counters going upwards, since they
are send anyway. See [1] "This if statement doesn't normally do
anything", get rid of it.

[1] https://github.com/candle-usb/candleLight_fw/pull/61
This commit is contained in:
Jeroen Hofstee 2022-08-31 22:57:07 +02:00 committed by fenugrec
parent d991308d63
commit 9a663007f5
2 changed files with 8 additions and 24 deletions
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2
include/can.h
View File

@ -57,8 +57,6 @@ bool can_send(can_data_t *hcan, struct gs_host_frame *frame);
*/
uint32_t can_get_error_status(can_data_t *hcan);
#define CAN_ERRCOUNT_THRESHOLD 15 /* send an error frame if tx/rx counters increase by more than this amount */
/** parse status value returned by can_get_error_status().
* @param frame : will hold the generated error frame
* @return 1 when status changes (if any) need a new error frame sent

30
src/can.c
View File

@ -272,7 +272,13 @@ bool can_send(can_data_t *hcan, struct gs_host_frame *frame)
uint32_t can_get_error_status(can_data_t *hcan)
{
CAN_TypeDef *can = hcan->instance;
return can->ESR;
uint32_t err = can->ESR;
/* Write 7 to LEC so we know if it gets set to the same thing again */
can->ESR = 7<<4;
return err;
}
static bool status_is_active(uint32_t err)
@ -286,6 +292,7 @@ bool can_parse_error_status(uint32_t err, uint32_t last_err, can_data_t *hcan, s
* whether there's anything worth sending. This variable tracks that final
* result. */
bool should_send = false;
(void) hcan;
frame->echo_id = 0xFFFFFFFF;
frame->can_id = CAN_ERR_FLAG | CAN_ERR_CRTL;
@ -323,23 +330,6 @@ bool can_parse_error_status(uint32_t err, uint32_t last_err, can_data_t *hcan, s
frame->data[6] = tx_error_cnt;
frame->data[7] = rx_error_cnt;
uint8_t last_tx_error_cnt = (last_err>>16) & 0xFF;
uint8_t last_rx_error_cnt = (last_err>>24) & 0xFF;
/* If either error counter transitioned to/from 0. */
if ((tx_error_cnt == 0) != (last_tx_error_cnt == 0)) {
should_send = true;
}
if ((rx_error_cnt == 0) != (last_rx_error_cnt == 0)) {
should_send = true;
}
/* If either error counter increased by 15. */
if (((int)last_tx_error_cnt + CAN_ERRCOUNT_THRESHOLD) < tx_error_cnt) {
should_send = true;
}
if (((int)last_rx_error_cnt + CAN_ERRCOUNT_THRESHOLD) < rx_error_cnt) {
should_send = true;
}
if (err & CAN_ESR_EPVF) {
frame->data[1] |= CAN_ERR_CRTL_RX_PASSIVE | CAN_ERR_CRTL_TX_PASSIVE;
if (!(last_err & CAN_ESR_EPVF)) {
@ -389,9 +379,5 @@ bool can_parse_error_status(uint32_t err, uint32_t last_err, can_data_t *hcan, s
break;
}
CAN_TypeDef *can = hcan->instance;
/* Write 7 to LEC so we know if it gets set to the same thing again */
can->ESR = 7<<4;
return should_send;
}