FreeCalypso > hg > freecalypso-sw
view rvinterf/lowlevel/packetrx.c @ 923:10b4bed10192
gsm-fw/L1: fix for the DSP patch corruption bug
The L1 code we got from the LoCosto fw contains a feature for DSP CPU load
measurement. This feature is a LoCosto-ism, i.e., not applicable to earlier
DBB chips (Calypso) with their respective earlier DSP ROMs. Most of the
code dealing with that feature is conditionalized as #if (DSP >= 38),
but one spot was missed, and the MCU code was writing into an API word
dealing with this feature. In TCS211 this DSP API word happens to be
used by the DSP code patch, hence that write was corrupting the patched
DSP code.
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
---|---|
date | Mon, 19 Oct 2015 17:13:56 +0000 |
parents | 2f285f20d617 |
children |
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/* * This module handles the lowest level of serial packet Rx */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include "../include/pktmux.h" #include "../include/limits.h" extern int target_fd; u_char rxpkt[MAX_PKT_FROM_TARGET]; size_t rxpkt_len; static int in_pkt, dle_state, toobig; static void process_inbyte(inb) { char errbuf[128]; if (!in_pkt) { if (inb != STX || dle_state) { rxpkt_len++; dle_state = (inb == DLE); return; } if (rxpkt_len) { sprintf(errbuf, "Warning: Rx %u byte%s outside of a packet", (unsigned)rxpkt_len, rxpkt_len != 1 ? "s" : ""); output_line(errbuf); rxpkt_len = 0; } in_pkt = 1; toobig = 0; return; } if (dle_state) { dle_state = 0; if (inb != STX && inb != DLE) { sprintf(errbuf, "Rx framing error: %02X after DLE", inb); output_line(errbuf); in_pkt = 0; rxpkt_len = 0; return; } goto data; } if (inb == DLE) { dle_state = 1; return; } else if (inb == STX) { if (!rxpkt_len) return; in_pkt = 0; handle_rx_packet(); rxpkt_len = 0; return; } data: if (rxpkt_len >= MAX_PKT_FROM_TARGET) { if (!toobig) { output_line("Error: Rx packet too big!"); toobig = 1; } return; } rxpkt[rxpkt_len++] = inb; } void process_serial_rx() { u_char rdbuf[512]; int cc, i; cc = read(target_fd, rdbuf, sizeof rdbuf); if (cc <= 0) { perror("Error/EOF reading from target"); exit(1); } for (i = 0; i < cc; i++) process_inbyte(rdbuf[i]); }