reprap: Added a 'relief' sleep

Tweaked Marlin to do a spurious write to GPIOR0 so allow
the simulator to get some usleep() and not use 100% cpu

Signed-off-by: Michel Pollet <buserror@gmail.com>

diff --git a/examples/board_reprap/src/reprap.c b/examples/board_reprap/src/reprap.c
index 387c571..c93829a 100644 (file)
--- a/examples/board_reprap/src/reprap.c
+++ b/examples/board_reprap/src/reprap.c
@@ -200,6 +200,20 @@ mongoose_callback(
        }
 }
 
+#define MEGA644_GPIOR0 0x3e
+
+static void
+reprap_relief_callback(
+               struct avr_t * avr,
+               avr_io_addr_t addr,
+               uint8_t v,
+               void * param)
+{
+//     printf("%s write %x\n", __func__, addr);
+       usleep(1000);
+}
+
+
 int main(int argc, char *argv[])
 {
        int debug = 0;
@@ -233,13 +247,13 @@ int main(int argc, char *argv[])
                uint32_t base, size;
 //             snprintf(path, sizeof(path), "%s/%s", pwd, "ATmegaBOOT_168_atmega328.ihex");
                strcpy(path, "marlin/Marlin.hex");
-               //strcpy(path, "marlin/bootloader-644-20MHz.hex");
+               strcpy(path, "marlin/bootloader-644-20MHz.hex");
                uint8_t * boot = read_ihex_file(path, &size, &base);
                if (!boot) {
                        fprintf(stderr, "%s: Unable to load %s\n", argv[0], path);
                        exit(1);
                }
-               printf("Firmware %04x: %d\n", base, size);
+               printf("Firmware %04x(%04x in AVR talk): %d bytes (%d words)\n", base, base/2, size, size/2);
                memcpy(avr->flash + base, boot, size);
                free(boot);
                avr->pc = base;
@@ -256,6 +270,10 @@ int main(int argc, char *argv[])
                avr_gdb_init(avr);
        }
 
+       // Marlin doesn't loop, sleep, so we don't know when it's idle
+       // I changed Marlin to do a spurious write to the GPIOR0 register so we can trap it
+       avr_register_io_write(avr, MEGA644_GPIOR0, reprap_relief_callback, NULL);
+
        uart_pty_init(avr, &uart_pty);
        uart_pty_connect(&uart_pty, '0');