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jtag player: reduce serial buffer size to 62 bytes

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Values bigger than 63 bytes seem to cause issue on AVR MCUs.
This commit is contained in:
ole00 2024-04-12 22:33:21 +01:00
parent 316d103456
commit fb22c14e9f
1 changed files with 11 additions and 5 deletions
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16
jtag_xsvf_player.h
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@ -40,9 +40,8 @@ Arduino usage:
*/
//XSVF_BUF_SIZE must be power of 2 ( 4,8 16,32,64 etc)
#define XSVF_BUF_SIZE 64
//value bigger than 63 may cause reading errors on AVR MCUs.
#define XSVF_BUF_SIZE 62
#define XSVF_DEBUG 0
#define XSVF_CALC_CSUM 1
@ -307,13 +306,20 @@ static inline uint8_t jtag_port_get_veref(jtag_port_t* port) {
static uint8_t xsvf_player_next_byte(void) {
uint8_t retry = 16;
uint8_t pos = xsvf->rdpos & (XSVF_BUF_SIZE - 1);
uint8_t pos = xsvf->rdpos % XSVF_BUF_SIZE;
if (xsvf->wrpos == xsvf->rdpos) {
size_t r = 0;
while (r == 0) {
Serial.println(F("$064")); // request to receive BUF size bytes
#if XSVF_DEBUG
Serial.println("D<<< req read"); // request to receive BUF size bytes
#endif
Serial.println(F("$062")); // request to receive BUF size bytes
r = Serial.readBytes(xsvf_buf + pos, XSVF_BUF_SIZE - pos);
#if XSVF_DEBUG
Serial.print("D<<< read "); // request to receive BUF size bytes
Serial.println(r, DEC); // request to receive BUF size bytes
#endif
if (r == 0) {
retry --;
if (retry == 0) {