Hello everyone.
I’ve just started using Mbed Studio, but I’m already having trouble.
Is there a special procedure I need to follow?
Hi! This page has some stuff you should read if working with LPC1768: MCU Info Page: LPC1768 · mbed-ce/mbed-os Wiki · GitHub
In particular, make sure to do the firmware update, as many of these boards ship with very old debugger firmware.
MACRUM
February 28, 2025, 11:58am
3
Hi,
It may be worth to see this.
opened 07:01AM - 18 Sep 21 UTC
mirrored
Jira status: OPEN
type: bug
IOTOSM-4310
### Description of defect
LED is not blinking on some target boards.
Rec… ently, following code has been added in this example code.
```
// Initialise the digital pin LED1 as an output
#ifdef LED1
DigitalOut led(LED1);
#else
bool led;
#endif
```
The `#ifdef` detective doesn't recognize typedefed LED1 symbol, so LED doesn't blink for some target boards such as NXP LPC1768, Renesas, Nordic, Maxim and other target board which declare LED symbol as typedef.
Typical decleration for typedef is as below.
```
typedef enum {
// snip
LED1 = PF4,
LED2 = PF5,
LED3 = PF6,
LED4 = PF7,
// snip
} PinName;
```
AFAIK, C/C++ preprocessor can only handle macros and arithmetic constant expressions.
#### Target(s) affected by this defect ?
NXP LPC1768, Renesas, Nordic, Maxim, Toshiba target and others
#### Toolchain(s) (name and version) displaying this defect ?
```
arm-none-eabi-gcc (GNU Tools for Arm Embedded Processors 9-2019-q4-major) 9.2.1 20191025 (release) [ARM/arm-9-branch revision 277599]
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
```
#### What version of Mbed-os are you using (tag or sha) ?
```
mbed-os-example-blinky (#8164c4764939, tag: mbed-os-6.14.0)
`- mbed-os (#3377f083b3a6, tags: mbed-os-6.14.0, mbed-os-6.14.0-rc1)
```
#### What version(s) of tools are you using. List all that apply (E.g. mbed-cli)
```
$ mbed --version
1.10.5
$ mbed-tools --version
7.35.0
```
#### How is this defect reproduced ?
Import the example, compile and run.
```
$ mbed-tools import https://github.com/ARMmbed/mbed-os-example-blinky
$ cd mbed-os-example-blinky
$ mbed compile -m rz_a1h -t gcc_arm
```
