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Official Yotta target for OSHChip using gcc

Getting Started With Yotta and OSHChip

Installing Yotta

Install the latest version of Yotta from the official Yotta website for your operating system. you can run yotta in the command line with either yotta or yt

Creating your Project

Create a new directory and navigate to it in your command line using cd, then run yotta init to create a new project. answer the questions it asks, or hit enter to use the default. When it asks if you want to create an executable, say yes

Downloading Dependencies

To target the OSHChip run yotta target oshchip-gcc. Yotta will automatically download the latest version of this repository and set it as your target. Then, install the mbed environment with yotta install mbed-drivers

Writing your Code

Write your code in the Source directory of your project as .cpp files. Instead of the usual main function familiar to C and C++ programmers, mbed runs a function called app_start, which takes one int and an array of chars as arguments. You can find the full mbed docs here, or the source here.

For the OSHChip, you can use different pins either by their pin number OSHChip_Pin_1 or by an arduino-style IO name such as D0 or A0. The LEDs can be used with LED1, LED2, and LED3.

TX/D0 -| 1     16 |- VCC
RX/D1 -| 2     15 |- D8
   D2 -| 3     14 |- D7
   D3 -| 4     13 |- A0
   D4 -| 5     12 |- A1
   D5 -| 6     11 |- D9/AREF
   D4 -| 7     10 |- A2
  GND -| 8  ::  9 |- A3

below is an example project that blinks LED1 and outputs the LED's status over UART on D0 and D1

#include "mbed-drivers/mbed.h"

static void blinky(void) {
    static DigitalOut led(LED1);
    led = !led;
    printf("LED = %d \r\n",;

void app_start(int, char**) {


Yotta target for gcc and OSHChip




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