avr/modules/flash: make protocol more robust

- wait for ATTN high after error receiving a packet - use different wait times when waiting for FLASH_START and FLASH_DATA
2025-05-05 21:05:07 +02:00
parent 9063962c7d
commit eecb022a0c
4 changed files with 13 additions and 5 deletions
--- a/avr/modules/flash/io_bitbang.asm
+++ b/avr/modules/flash/io_bitbang.asm
@@ -135,6 +135,11 @@ ioRawWaitForValidMsg_attnLow:
  ldi r17, FLASH_RECVBUFFER_MAXLEN-3
  rcall ioRawReceivePacketIntoBuffer
  brcs ioRawWaitForValidMsg_packetReceived
+  ; wait until ATTN is high (up to 10s)
+  ldi r16, 0xff                         ; expect ATTN high
+  ldi r17, 100
+  rcall ioWaitForAttnState100ms         ; wait for up to 10s
+  clc
  ret
 ioRawWaitForValidMsg_packetReceived:
  ldi r16, 0xff                         ; expect ATTN high