This article baed on "pca10040", nRF52832
example code path "examples/ble_peripheral/ble_app_uart"
board config file of this example located in "components/boards/pca10040.h"
and uart pin defined in this file, like this:
#define RX_PIN_NUMBER 8
#define TX_PIN_NUMBER 6
So, the KEY point of this example is uart character goes through PIN#8 an PIN#6
if you don't know where are they, see schematic of you board
I spend whole night to figure out why I can't see anything through my JLink uart
thats because my JLink uart using PIN#15 and PIN#16 as UART
after I changed my code to :
#define RX_PIN_NUMBER 16
#define TX_PIN_NUMBER 15
problem resolved(if nothing happened , try swap RX TX pin)
my JLink Jack Schematic
Windows Step Flow
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