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Last commit 20 Feb 2019 by 
mbed official
targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/port/quick_start/qs_port_basic.h@592:a274ee790e56, 2015-07-17 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Jul 17 09:15:10 2015 +0100
- Revision:
- 592:a274ee790e56
- Parent:
- 579:53297373a894
Synchronized with git revision e7144f83a8d75df80c4877936b6ffe552b0be9e6
Full URL: https://github.com/mbedmicro/mbed/commit/e7144f83a8d75df80c4877936b6ffe552b0be9e6/
More API implementation for SAMR21
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mbed_official | 579:53297373a894 | 1 | /** |
| mbed_official | 579:53297373a894 | 2 | * \page asfdoc_sam0_port_basic_use_case Quick Start Guide for PORT - Basic |
| mbed_official | 579:53297373a894 | 3 | * |
| mbed_official | 579:53297373a894 | 4 | * In this use case, the PORT module is configured for: |
| mbed_official | 579:53297373a894 | 5 | * \li One pin in input mode, with pull-up enabled |
| mbed_official | 579:53297373a894 | 6 | * \li One pin in output mode |
| mbed_official | 579:53297373a894 | 7 | * |
| mbed_official | 579:53297373a894 | 8 | * This use case sets up the PORT to read the current state of a GPIO pin set as |
| mbed_official | 579:53297373a894 | 9 | * an input, and mirrors the opposite logical state on a pin configured as an |
| mbed_official | 579:53297373a894 | 10 | * output. |
| mbed_official | 579:53297373a894 | 11 | * |
| mbed_official | 579:53297373a894 | 12 | * \section asfdoc_sam0_port_basic_use_case_setup Setup |
| mbed_official | 579:53297373a894 | 13 | * |
| mbed_official | 579:53297373a894 | 14 | * \subsection asfdoc_sam0_port_basic_use_case_setup_prereq Prerequisites |
| mbed_official | 579:53297373a894 | 15 | * There are no special setup requirements for this use-case. |
| mbed_official | 579:53297373a894 | 16 | * |
| mbed_official | 579:53297373a894 | 17 | * \subsection asfdoc_sam0_port_basic_use_case_setup_code Code |
| mbed_official | 579:53297373a894 | 18 | * Copy-paste the following setup code to your user application: |
| mbed_official | 579:53297373a894 | 19 | * \snippet qs_port_basic.c setup |
| mbed_official | 579:53297373a894 | 20 | * |
| mbed_official | 579:53297373a894 | 21 | * Add to user application initialization (typically the start of \c main()): |
| mbed_official | 579:53297373a894 | 22 | * \snippet qs_port_basic.c setup_init |
| mbed_official | 579:53297373a894 | 23 | * |
| mbed_official | 579:53297373a894 | 24 | * \subsection asfdoc_sam0_port_basic_use_case_setup_flow Workflow |
| mbed_official | 579:53297373a894 | 25 | * -# Create a PORT module pin configuration struct, which can be filled out to |
| mbed_official | 579:53297373a894 | 26 | * adjust the configuration of a single port pin. |
| mbed_official | 579:53297373a894 | 27 | * \snippet qs_port_basic.c setup_1 |
| mbed_official | 579:53297373a894 | 28 | * -# Initialize the pin configuration struct with the module's default values. |
| mbed_official | 579:53297373a894 | 29 | * \snippet qs_port_basic.c setup_2 |
| mbed_official | 579:53297373a894 | 30 | * \note This should always be performed before using the configuration |
| mbed_official | 579:53297373a894 | 31 | * struct to ensure that all values are initialized to known default |
| mbed_official | 579:53297373a894 | 32 | * settings. |
| mbed_official | 579:53297373a894 | 33 | * |
| mbed_official | 579:53297373a894 | 34 | * -# Adjust the configuration struct to request an input pin. |
| mbed_official | 579:53297373a894 | 35 | * \snippet qs_port_basic.c setup_3 |
| mbed_official | 579:53297373a894 | 36 | * -# Configure push button pin with the initialized pin configuration struct, to enable |
| mbed_official | 579:53297373a894 | 37 | * the input sampler on the pin. |
| mbed_official | 579:53297373a894 | 38 | * \snippet qs_port_basic.c setup_4 |
| mbed_official | 579:53297373a894 | 39 | * -# Adjust the configuration struct to request an output pin. |
| mbed_official | 579:53297373a894 | 40 | * \snippet qs_port_basic.c setup_5 |
| mbed_official | 579:53297373a894 | 41 | * \note The existing configuration struct may be re-used, as long as any |
| mbed_official | 579:53297373a894 | 42 | * values that have been altered from the default settings are taken |
| mbed_official | 579:53297373a894 | 43 | * into account by the user application. |
| mbed_official | 579:53297373a894 | 44 | * |
| mbed_official | 579:53297373a894 | 45 | * -# Configure LED pin with the initialized pin configuration struct, to enable |
| mbed_official | 579:53297373a894 | 46 | * the output driver on the pin. |
| mbed_official | 579:53297373a894 | 47 | * \snippet qs_port_basic.c setup_6 |
| mbed_official | 579:53297373a894 | 48 | * |
| mbed_official | 579:53297373a894 | 49 | * \section asfdoc_sam0_port_basic_use_case_use_main Use Case |
| mbed_official | 579:53297373a894 | 50 | * |
| mbed_official | 579:53297373a894 | 51 | * \subsection asfdoc_sam0_port_basic_use_case_code Code |
| mbed_official | 579:53297373a894 | 52 | * Copy-paste the following code to your user application: |
| mbed_official | 579:53297373a894 | 53 | * \snippet qs_port_basic.c main |
| mbed_official | 579:53297373a894 | 54 | * |
| mbed_official | 579:53297373a894 | 55 | * \subsection asfdoc_sam0_port_basic_use_case_flow Workflow |
| mbed_official | 579:53297373a894 | 56 | * -# Read in the current input sampler state of push button pin, which has been |
| mbed_official | 579:53297373a894 | 57 | * configured as an input in the use-case setup code. |
| mbed_official | 579:53297373a894 | 58 | * \snippet qs_port_basic.c main_1 |
| mbed_official | 579:53297373a894 | 59 | * -# Write the inverted pin level state to LED pin, which has been configured as |
| mbed_official | 579:53297373a894 | 60 | * an output in the use-case setup code. |
| mbed_official | 579:53297373a894 | 61 | * \snippet qs_port_basic.c main_2 |
| mbed_official | 579:53297373a894 | 62 | */ |
| mbed_official | 579:53297373a894 | 63 | /** |
| mbed_official | 579:53297373a894 | 64 | * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a> |
| mbed_official | 579:53297373a894 | 65 | */ |
