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-rw-r--r--tests/adc-power/README.md4
1 files changed, 4 insertions, 0 deletions
diff --git a/tests/adc-power/README.md b/tests/adc-power/README.md
index 7da8ad7..3f36045 100644
--- a/tests/adc-power/README.md
+++ b/tests/adc-power/README.md
@@ -3,6 +3,10 @@ For most boards, adc channels 1 and 5 are PA1 and PA5.
Not the F3. oh no, that board is cray cray. PA0 and PF4
+For boards with a Cortex-M3 or better, debug output is on ITM
+channel 0 (Yay!)
+For M0/M0+ boards, debug is via a tx only UART on PA9.
+
https://github.com/libopencm3/libopencm3/pull/471
https://github.com/libopencm3/libopencm3/pull/457
https://github.com/libopencm3/libopencm3/pull/534