diff options
Diffstat (limited to 'avr/cmd_cpu.c')
| -rw-r--r-- | avr/cmd_cpu.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/avr/cmd_cpu.c b/avr/cmd_cpu.c index 1b1982c..1627d9f 100644 --- a/avr/cmd_cpu.c +++ b/avr/cmd_cpu.c @@ -97,7 +97,7 @@ static void test_delay(uint32_t count) { uint32_t ts = get_timer(0); - while (get_timer(ts) < count); + while (get_timer(ts) <= count); } command_ret_t do_cpu_test(cmd_tbl_t *cmdtp UNUSED, uint_fast8_t flag UNUSED, int argc, char * const argv[]) @@ -133,6 +133,31 @@ command_ret_t do_cpu_test(cmd_tbl_t *cmdtp UNUSED, uint_fast8_t flag UNUSED, int return CMD_RET_SUCCESS; } +command_ret_t do_busack_test(cmd_tbl_t *cmdtp UNUSED, uint_fast8_t flag UNUSED, int argc UNUSED, char * const argv[] UNUSED) +{ + + if ((z80_bus_state() & ZST_ACQUIRED) != RESET) + cmd_error(CMD_RET_FAILURE, ERUNNING, NULL); + + z80_bus_cmd(Request); + uint32_t result = z80_get_busreq_cycles(); + test_delay(20); + z80_bus_cmd(Release); + +#if 0 + long div; + + pinconf = gpio_config_get(pin); + if (pinconf == OUTPUT_TIMER) { + div = gpio_clockdiv_get(pin); +#endif + + + printf_P(PSTR("cycles: %lu, time: %luus\n"), result, (uint32_t) (result * 1000000LL / F_CPU)); + + return CMD_RET_SUCCESS; +} + #if 0 command_ret_t do_cpu_freq(cmd_tbl_t *cmdtp UNUSED, int flag UNUSED, int argc, char * const argv[]) { @@ -250,6 +275,11 @@ CMD_TBL_ITEM( "Do bus request/release cycles", "[-t pulsewidth]" ), +CMD_TBL_ITEM( + busack, 2, 1, do_busack_test, + "Get time from /Reset high to /BUSACK low", + "" +), #if 0 CMD_TBL_ITEM( freq, CONFIG_SYS_MAXARGS, 1, do_cpu_freq, |