Dan Allen
a program to ramp the blink frequency of an analog out pin for Nucleo L432KC
Revision 0:95d8db6b6e4d, committed 2019-01-27
- Comitter:
- laserdad
- Date:
- Sun Jan 27 15:48:36 2019 +0000
- Commit message:
- ramping version full range
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.gitignore Sun Jan 27 15:48:36 2019 +0000 @@ -0,0 +1,4 @@ +.build +.mbed +projectfiles +*.py*
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FastPWM.lib Sun Jan 27 15:48:36 2019 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/Sissors/code/FastPWM/#c0b2265cff9c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/README.md Sun Jan 27 15:48:36 2019 +0000 @@ -0,0 +1,57 @@ +# Getting started with Blinky on mbed OS + +This guide reviews the steps required to get Blinky working on an mbed OS platform. + +Please install [mbed CLI](https://github.com/ARMmbed/mbed-cli#installing-mbed-cli). + +## Import the example application + +From the command-line, import the example: + +``` +mbed import mbed-os-example-blinky +cd mbed-os-example-blinky +``` + +### Now compile + +Invoke `mbed compile`, and specify the name of your platform and your favorite toolchain (`GCC_ARM`, `ARM`, `IAR`). For example, for the ARM Compiler 5: + +``` +mbed compile -m K64F -t ARM +``` + +Your PC may take a few minutes to compile your code. At the end, you see the following result: + +``` +[snip] ++----------------------------+-------+-------+------+ +| Module | .text | .data | .bss | ++----------------------------+-------+-------+------+ +| Misc | 13939 | 24 | 1372 | +| core/hal | 16993 | 96 | 296 | +| core/rtos | 7384 | 92 | 4204 | +| features/FEATURE_IPV4 | 80 | 0 | 176 | +| frameworks/greentea-client | 1830 | 60 | 44 | +| frameworks/utest | 2392 | 512 | 292 | +| Subtotals | 42618 | 784 | 6384 | ++----------------------------+-------+-------+------+ +Allocated Heap: unknown +Allocated Stack: unknown +Total Static RAM memory (data + bss): 7168 bytes +Total RAM memory (data + bss + heap + stack): 7168 bytes +Total Flash memory (text + data + misc): 43402 bytes +Image: .\.build\K64F\ARM\mbed-os-example-blinky.bin +``` + +### Program your board + +1. Connect your mbed device to the computer over USB. +1. Copy the binary file to the mbed device. +1. Press the reset button to start the program. + +The LED on your platform turns on and off. + +## Troubleshooting + +If you have problems, you can review the [documentation](https://os.mbed.com/docs/latest/tutorials/debugging.html) for suggestions on what could be wrong and how to fix it.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sun Jan 27 15:48:36 2019 +0000
@@ -0,0 +1,26 @@
+#include "mbed.h"
+
+AnalogOut base(A3);
+Serial pc(USBTX, USBRX,9600);
+// main() runs in its own thread in the OS
+float min_loop_time = 1e6;
+Timer t;
+int main() {
+ pc.printf("starting main program\r\n");
+ while (1) {
+ float delay_time = 2e6;
+ t.start();
+ while(delay_time > 1.0) {
+ base = 1;
+ wait_us(delay_time);
+ base = 0;
+ wait_us(delay_time);
+ if(t.read_us() > min_loop_time) {
+ delay_time = delay_time/2;
+ t.reset();
+ pc.printf("%.0f\r\n",delay_time);
+ }
+ }
+ }
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Sun Jan 27 15:48:36 2019 +0000 @@ -0,0 +1,1 @@ +https://github.com/ARMmbed/mbed-os/#2fd0c5cfbd83fce62da6308f9d64c0ab64e1f0d6