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-rw-r--r--ports/nrf/boards/PCA10040/mpconfigboard.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/ports/nrf/boards/PCA10040/mpconfigboard.h b/ports/nrf/boards/PCA10040/mpconfigboard.h
index b965bf319d..2b1c4c7ef5 100644
--- a/ports/nrf/boards/PCA10040/mpconfigboard.h
+++ b/ports/nrf/boards/PCA10040/mpconfigboard.h
@@ -64,3 +64,8 @@
#define MICROPY_HW_PWM2_NAME "PWM2"
#define HELP_TEXT_BOARD_LED "1,2,3,4"
+
+// The JLink CDC on the PCA10040 cannot accept more than 64 incoming bytes at a time.
+// That makes the UART REPL unreliable in general. But it can be improved to some
+// extent by setting the raw-paste buffer size to that limit of 64.
+#define MICROPY_REPL_STDIN_BUFFER_MAX (64)