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keep WDT happy

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This commit is contained in:
iceman1001 2020-09-15 17:26:24 +02:00
parent 2ae3a84db6
commit edebf17be5
1 changed files with 3 additions and 2 deletions
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5
armsrc/legicrfsim.c
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@ -53,7 +53,7 @@ static uint32_t last_frame_end; /* ts of last bit of previews rx or tx frame */
#define RWD_TIME_PAUSE 4 /* 18.9us */
#define RWD_TIME_1 21 /* RWD_TIME_PAUSE 18.9us off + 80.2us on = 99.1us */
#define RWD_TIME_0 13 /* RWD_TIME_PAUSE 18.9us off + 42.4us on = 61.3us */
#define RWD_CMD_TIMEOUT 120 /* 120 * 99.1us (arbitrary value) */
#define RWD_CMD_TIMEOUT 400 /* 120 * 99.1us (arbitrary value) */
#define RWD_MIN_FRAME_LEN 6 /* Shortest frame is 6 bits */
#define RWD_MAX_FRAME_LEN 23 /* Longest frame is 23 bits */
@ -68,6 +68,7 @@ static uint32_t last_frame_end; /* ts of last bit of previews rx or tx frame */
// Note: inlining this function would fail with -Os
static bool wait_for(bool value, const uint32_t timeout) {
while ((bool)(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_DIN) != value) {
WDT_HIT();
if (GetCountSspClk() > timeout) {
return false;
}
@ -215,7 +216,7 @@ static int32_t rx_frame(uint8_t *len) {
last_frame_end -= 2;
// wait for first pause (start of frame)
for (uint8_t i = 0; true; ++i) {
for (uint16_t i = 0; true; ++i) {
// increment prng every TAG_BIT_PERIOD
last_frame_end += TAG_BIT_PERIOD;
legic_prng_forward(1);